Audi Fault Codes DTC AUDI Fault Codes DTC

Download

Volkswagen/Audi

Vehicle Communication

Software Manual

August 2013

EAZ0031B01E Rev. A

Trademarks

Snap-on is a trademark of Snap-on Incorporated. All other marks are trademarks or registered tr ademarks of th eir resp ective hold ers.

Disclaimer

The information, specifications and illustrations in this manual are based on the latest information available at the time of printing.

Snap-on reserves the right to make changes at any time without notice.

Visit our website at:

http://diagnostics.snapon.com (North America)

For Technical Assistance Call:

1-800-424-7226 (North America)

Safety Information

DANGER

WARNING

CAUTION

For your own safety and the safety of others, and to prevent damage to the equipment an d vehicles upon which it is used, it is important that the accompanying Safety Information be read and understood by all persons operating, or coming into contact with, the equ ipment. We suggest you store a copy near the unit in sight of the operato r

This product is intended for use by properly trained and ski lled pro fessional automo tive technicians. The safety messages presented throughout this manual are reminders to the operator to exercise extreme care when using this test instrument.

There are many variations in procedures, techniques, tools, and p art s for servicing vehicles, as well as in the skill of the individual doing the work. Because of the vast number of test applications and variations in the products that can be tested with this instrument, we cannot possibly anticipate or provide advice or safety messages to cover every situation. It is the automotive technician’s responsibility to be knowledgeable of the system being tested. It is essential to use proper service methods and test procedures. It is import ant to perform tests in an appropriate and acceptable manner that does not endanger your sa fety, the safety of others in the wor k area, the equipment being used, or the vehicle being tested.

It is assumed that the operator has a thorough underst anding of vehicle systems before using this product. Understanding of these system principl es and oper ating theor ies is nece ssary for competent, safe and accurate use of this instrument.

Before using the equipment, always refer to and follow the safety messages and app licable te st procedures provided by the manufacturer of the vehicle or equipment being tested. Use the equipment only as described in this manual.

Read, understand and follow all safety messag es and instructio ns in this manual, the accompanying safety manual, and on the test equi pment.

Safety Message Conventions

Safety messages are provided to help prevent personal injury and equipm ent damage. All safety messages are introduced by a signal word indicating the haza rd level.

Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury to the operator or to bystanders.

Indicates a potentially hazardous situation which, if n ot avoided, could result in death o r serious injury to the operator or to bystanders.

Indicates a potentially hazardous situation which, if not a voided, may r esult in modera te or mino r injury to the operator or to bystanders.

iii

Safety Information Important Safety Instructio ns

WARNING

Safety messages contain three different type styles.

• Normal type states the hazard.

• Bold type states how to avoid the hazard.

• Italic type states the possible consequences of not avoid ing th e hazard.

An icon, when present, gives a graphical description of the potential hazard. Example:

Risk of unexpected vehicle movement.

• Block drive wheels before performing a test with engine running.

A moving vehicle can cause injury.

Important Safety Instructions

For a complete list of safety mess ages, refer to the accomp anying safety manual.

SAVE THESE INSTRUCTIONS

Table of Contents

Safety Information..................................................................................................................... iii

Chapter 1: Using This Manual................................................................................................... 1

Conventions.................................................................................................................................. 1

Bold Text ................................................................................................................................ 1

Terminology............................................................................................................................ 1

Notes and Important Messages....................................................................................................2

Notes...................................................................................................................................... 2

Important................................................................................................................................ 2

Chapter 2: Introduction.............................................................................................................. 3

Chapter 3: Operations................................................................................................................ 4

Identifying the Vehicle................................................................................................................... 4

Engine ID Codes........... .... ... ... ... ... .... ...................................... .... ... ... ... .... ... ........................... 5

Vehicle Identification.............................................................................................................11

Connecting to a Vehicle...............................................................................................................11

Selecting a System..................................................................................................................... 15

Demonstration Programs............................................................................................................ 17

Chapter 4: Expert Mode ........................................................................................................... 18

Using Expert Mode..................................................................................................................... 18

Initiating Expert Mode ....................................... ... ... ....................................... ... ... .... ... ... ... ...19

Selecting a System ..............................................................................................................19

Expert Mode Function Selection Menu............................. ... ... .... ... ... ... .... ... ... ... ....... ... ... ... ... 20

Testing in Expert Mode............... ... ....................................... ... ... ... .... ... ... ................................... 29

Chapter 5: Testing .................................................................................................................... 30

VW/Audi Software Application List ............................................................................................. 30

Testing Engine Systems............................................................................................................. 32

VW/Audi Application Coverage............................................................................................ 32

Clearing Codes .................................................................................................................... 40

Data...................................................................................................................................... 42

Functional Tests................................... ... ... ....................................... ... .... ... ... ... ... ................ 43

Testing Transmission Systems................................................................................................... 53

Digimat Control Module Identification—Golf & Jetta, 1993–97............................................ 58

4-Speed Automatic Transmission—01N .............................................................................. 60

VW Series—095, 096, 01M . ... ....................................... ... ... ... .... ... ... ................................... 60

Audi Transmission—01F, 01K.............................................................................................. 61

Important Tips for Transmission Codes ............................................................................... 62

Transmission Basic Settings................................................................................................ 63

Functional Tests—VW Passat 01V ...................................................................................... 64

VW/Audi Transmission Emergency Operation—01V........................................................... 66

Testing Electronic Throttle Systems ........................................................................................... 67

Throttle V alve Control Module Adaptation............................................................................ 67

Table of Content s T abl e of Contents

Electronic Throttle Types ..................................................................................................... 69

Testing ABS Systems................................................................................................................. 72

ABS Basic Settings..............................................................................................................75

Testing Immobilizer Systems...................................................................................................... 75

Important Tips for Testing Immobilizer III Systems............................................................... 76

Audi Immobilizers................................................................................................................. 77

Immobilizer Adaptation Procedures............................ ... ... ... ... .... ... ... ... .... ... ... ... ... ....... ... ... ... 77

Radio Frequency Remote Control Functions....................................................................... 81

Immobilizer Frequently Asked Questions.......................................... ... .... ... ...... ... .... ... ... ... ... 82

Testing Electronic Instrument Panel Systems ............................................................................ 83

Electronic Instrument Panel Types....................................................................................... 83

Testing Airbag (SRS) Systems................................................................................................... 88

Testing CAN Data Bus Systems................................................................................................. 89

Sources of Interference........................................................................................................ 90

Powertrain CAN Bus............................................................................................................ 90

CAN Data Bus in the Convenience System......................................................................... 91

Chapter 6: Data Parameters .................................................................................................... 92

Alphabetical Parameter List..................... ...................................... .... ... ... ... .... ... ......................... 93

Gas Engine Parameters............. ... ... ... ....................................... ... .... ... ... ... .... .......................... 105

Diesel Engine Parameters........................................................................................................ 136

Transmission Parameters......................................................................................................... 140

Transmission Expert Mode Parameters ................................................................................... 148

ABS Parameters....................................................................................................................... 150

Appendix A: Terms and Acronyms....................................................................................... 151

Terms........................................................................................................................................ 151

Acronyms.................................................................................................................................. 151

Appendix B: Troubleshooting............................................................................................... 154

Communication Problems ........................................................................................................ 154

The Aftermarket Radio Problem............................................................................................... 154

The Problem ...................................................................................................................... 154

Testing for this Problem ..................................................................................................... 155

Appendix C: Fuel Control Learning Adaptation Values...................................................... 157

Long-Term Fuel Control............................................................................................................ 157

Additive Adaptation.............. ... ... ... .... ... ... ... ....................................... ... .... ... ... ... ... .............. 157

Multiplicative Adaptation ......................... ... .... ... ... ... ....................................... ... ... .... ... ... ... . 158

Examples of Display Groups for Long Term FT Adaptive Value ........................................ 158

Important Tips for Long Term Fuel Control......................................................................... 160

Short-Term Fuel Control........................................................................................................... 160

Examples Short Term FT O2 Regulation ........................................................................... 160

Important Tips for Short-Term Fuel Control........................................................................ 161

Oxygen Sensor Voltage............................................................................................................ 162

Early Vehicle Oxygen Sensor Reading..................................................................................... 162

Example: Motronic 2.9 (1993–1995)

.................................................................................. 163

Late Model Oxygen Sensor Reading........................................................................................ 163

Oxygen Sensor Aging Test ................................................................................................ 164

Oxygen Sensor Control-Dwell Time Test........................................................................... 165

CAT Test Parameters......................................................................................................... 165

Table of Content s T abl e of Contents

Index........................................................................................................................................ 170

vii

Chapter 1 Using This Manual

This manual contains instructions for testing Audi and Volkswagen vehicles. Some of the Illustrations shown in this manual may contain mo dules and optional equip ment that ar e not included on your system. Contact your sales representative for availability of accessories, other modules, and optional equipment.

1.1 Conventions

This manual uses the conventions described below.

1.1.1 Bold Text

Bold text is used for emphasis and to highlight selectable items such as buttons and me nu options.

Example:

• Select OK to continue.

1.1.2 Terminology

Certain terms are used to command specific acti ons throug hout this m anual. Tho se terms are described below .

Select

The term “select” means to highlight a menu item or othe r option, then pressing the Y/a, OK, Accept, or similar button to activate it.

Example:

• Select Functional Tests.

Scroll

The term “scroll” means moving the cursor or changing dat a by using the directiona l arro w buttons, scroll bars, or other means.

Example:

• Scroll to see any other codes and the data list.

Using This Manual Notes and Important Messages

NOTE:

IMPORTANT:

Scan T ool

The term “scan tool” is used to refer to any tool that communicate s dire ctly with th e vehicle dat a stream. When necessary, the term “Scanner” is used to distinguish Snap-on equipment from another diagnostic device, such as the Audi or Volkswagen factory scan tool.

1.2 Notes and Important Messages

The following messages appear throughout this manual.

1.2.1 Notes

A NOTE provides helpful information such as explanations, tips, and comment s. Example:

i For additional information refer to...

1.2.2 Important

IMPORTANT indicates a situation which, if not avoided, may result in damage to the test equipment or vehicle.

Example:

To avoid incorrect TPS adju stment or co mponen t damage, b e sure to follow th e on-screen instructions. Refer to a vehicle service manual for complete test or adjustme nt procedures.

Chapter 2 Introduction

This manual contains instructions for testing Volkswagen and Audi vehicles. Some of the illustrations shown in this manual may contain modules and optional equipment that

are not included on your system. Contact a Snap-on Sales Representative for availability of other modules and optional equipment.

This chapter provides an overview of the conventi o ns used in th is man ual. The rema inder of this guide is divided into the following chapters:

• Operations, on page 4—explains how to begin using the basic scan tool test functions, such

as identifying a vehicle, selecting a system for testing, and connecting to a vehicle.

• Expert Mode, on page 18—details enhanced factory tool capabilities and special functions,

such as setting adaptations and control module coding.

• Testing, on page 30—provides information and procedures for using the scan tool with

specific control systems.

• Data Parameters, on page 92—provides definitions and operating ranges for the

Volkswagen a nd Audi veh icle dat a stream parameters.

• T erms and Acrony ms, on page 151—defines common terms and acronyms used in this

manual.

• Troubleshooting, on page 154—contains information for troubleshooting specific problems

that may arise when using the scan tool.

• Fuel Control Learning Adapt ation Values, on page 157—explains OBD-II short and long

term FT terminology applied to VW/Audi fuel control terminology.

Chapter 3 Operations

Identify the Vehicle by Entering VIN Digits

Stop CommunicationFunctional Tests Review ECU IDCodes Only Data

Select Make

Select Market

Connect to the Vehicle

Select the System for Testing

System Main Menu

Select Volkswagen/Audi

Test the Same Vehicle?

YES NO

This chapter explains how to begin using the basic scan tool test functions, such as identifying a vehicle, selecting a system for testing, and connecting to a vehicle. This information is specific to VW/Audi vehicles. For general scan tool functionality, see the manual for your diagnostic tool.

3.1 Identifying the Vehicle

The scan tool typically identifies a vehicle using cert ain charac ters of the vehicle ide ntification number (VIN). The scan tool vehicle identification (ID) process prompts to you enter VIN characters and answer questions about the vehicle to be tested.

Figure 3-1

Basic Volkswagen Audi test routine

Operations Identifying the Vehicle

3.1.1 Engine ID Codes

The vehicle identification process includes entering the test vehicle’s engine ID code. Th e exact engine ID code selection is usually not required for vehicle communications, ho wever , in ord er for the scan tool to communicate with all installed systems, we recommend that you identify the correct engine code. The scan tool has to match all possible control module identities with the exact control module installed in the vehicle. In addition, the engine ID code is required to select the correct OBD-II Readiness Monitor setting procedures. See the Volkswagen/Audi OBD-II Readiness Charts for more information.

VW/Audi specific engine differences are determined by a th ree-digit en gine ID code. In any particular year, there could be multiple engine ID codes for any one engine . The engin e codes may represent different horsepower, torque rating or emission p ackag e.

Engine ID codes are stamped on the engine block in three-digit alph a characters followed b y a series of numbers (usually six), for example, “AEG 029452". If more tha n 999,999 engines with the same engine code are produced, the first number is replaced by a letter. Newer models may al so have an adhesive label located on the timing belt cover. The engine ID code can be dif ficu lt to locate on older engines with excessive oil and grea se. Here a re typi cal older m odel 4- and 6-cylinder locations:

• 4-cylinder engine codes and numbers are usually st amped into the rear of the cylinder block

casting near the oil filter flange near the engine/transmission joint.

• 6-cylinder engine codes are usually located on the left side of th e engine blo ck below the

camshaft timing chain tensioner. The code numbers should be visible when looking d own

between the throttle valve control module and the valve cover.

Note the following when looking for an engine ID code:

• Alternatively , look in the owners “maintena nce” man ual for a n adhesive sticke r.

• For most engines, the engine ID code is also included on the vehicle data plate, typically

located in the trunk near the spare tire. This ma y be the easie st way to find the engine co de. Table 3-1 contains engine ID code locations for Audi models.

Table 3-1

Model Year Engine Code Location

Beetle

Volkswagen engine ID code locations (part 1 of 4)

1999 and

later

1998–2002

2003

2004 and

later

1.8L

1.9L 4-cyl 2V TDI

2.0L 4-cyl

1.8L

Turbo

1.9L TDI

APH, AWP, AWV: Near the engine/transmission joint. Also on a sticker on the toothed belt guard.

ALH: Between the diesel injection pump and the exhaust manifold on the engine block. Also on a sticker on the timing belt guard.

BBW, BDC: On the front of the engine near the engine/ transmission joint. Also on a sticker on the cylinder head cover and vehicle data plate.

AWU: Unknown at this time. BKF: The engine number can be found on the joint between

engine/gearbox. BNU: The engine number can be found on the joint between

engine/gearbox. BEW: The engine number can be found on the joint between

engine/gearbox.

Operations Identifying the Vehicle

Table 3-1 Volkswagen engine ID code locations (part 2 of 4)

Model Year Engine Code Location

AZG: Near the engine/transmission joint. Also on a sticker on the

cylinder head cover and vehicle data plate. BDC: Front of the engine near the engine/transmission joint. Also

on a sticker on the cylinder head cover and vehicle data plate.

BER: Unknown at this time. BEV: The engine number can be found on the flange between

engine/transmission. AEG: Near the engine/transmission joint. Also on a sticker on the

cylinder head cover and vehicle data plate. AVH: Near the eng ine/transmission joint. Also on a sticker on the

cylinder head cover and vehicle data plate.

BHP: Unknown at this time. BGD: The engine number can be found at the front next to the joint

between engine/transmission AAF, ACU: Between cylinders 1 and 3 on the cylinder block. Also

on a sticker on the toothed belt guard. AES: Behind the cylinder head cover on the cylinder block. Also on

a sticker attached to the cylinder head cover.

AXK: The engine code is located next to the vibration damper on the cylinder head.

AFP: On the engine block next to the vibration damper. The engine ID number is found here from 06.27.99 production and from engine AFP-019059.

Also on a sticker on the back of the intake manifold upper section near the vacuum connection. Remove the engine cover to view.

AWD, AWP, AWW: Near the engine/transmission joint. Also on a sticker on the toothed belt guard.

ALH: Between the diesel injection pump and the exhaust manifold on the engine block. Also on a sticker on the toothed belt guard.

sticker on the cylinder head cover and vehicle data plate. BDF: Next to the vibration damper on the cylinder block. Also on a

sticker on the intake manifold. AFP: On the engine block next to the cylinder head, beneath the

chain tensioner for the camshaft roller chain. It can be seen by looking down between heating resistor N79 and the throttle valve control unit. Also on a sticker on the valve cover.

BBW: Near the engine/transmission joint. Also on a sticker on the cylinder head cover and vehicle data plate.

BEK: Unknown at this time.

rbo

BEW: The engine number can be found on the joint between engine/gearbox.

BKC: Unknown at this time. BRM: Unknown at this time.

Beetle

(continued)

Eurovan

Golf, Jetta,

GTI

2004 and

later

(continued)

1999 and

earlier

2000 and

later

2001 to

2004

1999 and

earlier

1999 and

later

2000 and

later

2003 2.0L

2004 and

later

2.0L

2.5L

2.8L

2.8L AES: On the cylinder block next to the vibration damper.

2.8L

2.8L VR6 2V

1.8L 4-cyl 5V Turbo

1.9L 4-cyl

2V TDI

2.0L 4-cyl 2VAEG, AVH, AZG: Near the engine/transmission joint. Also on a

2.8L

2.8L VR6

1.8L

1.9L TDI

Operations Identifying the Vehicle

Table 3-1 Volkswagen engine ID code locations (part 3 of 4)

Model Year Engine Code Location

BEV: The engine number can be found on the flange between

engine/transmission.

BER: Unknown at this time. BHP: Unknown at this time. BFM: Unknown at this time. BML: Unknown at this time. BJS: The engine number is located next to the vibration damper on

cylinder block under coolant pump.

BGQ: Unknown at this time. BGP: Unknown at this time. AAZ, 1Z: On the cylinder block between the diesel injection pump

and the exhaust. Also on a sticker on the toothed belt guard.

sticker on the cylinder head cover. AEB, ATW, AUG, AWM: On the left side of the cylinder block. Also

on a sticker on the cylinder head cover. The engine code is also stamped on the front of the engine lifting eye (visible after removing the cover above the fuel injectors).

the right cylinder head. BDP: On the left of the cylinder block. Also on a sticker on the

cylinder head cover. BHW: The engine number can be found on the joint between

engine/transmission.

BGW: Unknown at this time. AMX: Unknown at this time. BBG: Unknown at this time.

AZZ: Unknown at this time BKJ: Unknown at this time BAA: The engine number is located on cylinder block next to the

vibration damper and under coolant pump. BMX: The engine number is located next to the harmonic balancer

on the cylinder block under the coolant pump AXQ: The engine number is stamped on the right side of the

cylinder block. BHX: The engine number is stamped on the right hand side of the

engine block.

AYH: Unknown at this time. BKW: The engine number is located on the cylinder below the

cylinder head of cylinder bank 2. BGJ: The engine number is stamped on the right side of the

cylinder block BGH: The engine number is stamped on the right side of the

cylinder block

BAP: The engine number is located at left on cylinder block BAN: Unknown at this time. BRP: The engine number is located at left on cylinder block

Golf, Jetta,

GTI

(continued)

Passat

Touareg

Phaeton

2004 and

later

(continued)

2005 and

later

1995–97

1998 and

later

2004 and

later

2004 and

later

and

2004

later

2.0L

3.2L

2.5L

1.9L 4-cyl

2V TDI

2.8L VR6 2VAAA: On the vibration damper end of the cylinder block. Also on a

1.8L 4-cyl 5V Turbo

2.8L V6 5VAHA, ATQ: On the flat surface of the cylinder block, on the front of

W8, 4.0L

2.0L

2.8L

4.0L BDN: Unknown at this time.

3.2L

4.2L

5.0L TDI

4.2L

6.0L

Operations Identifying the Vehicle

Table 3-1 Volkswagen engine ID code locations (part 4 of 4)

Model Year Engine Code Location

BRM: The engine number can be found on the joint between

engine/transmission. BGP: The engine code and serial number are located on the

backside of the engine, above the separation point of the engine block/upper point of oil pan.

BGQ: The engine code and serial number are located on the backside of the engine, above the separation point of the engine block/upper point of oil pan.

New Jetta

2005 and

later

1.9L TDI

2.5L

Table 3-2 Audi engine ID code locations (part 1 of 3)

Model Year Engine Code Location

AUG, AWM: The engine ID code is stamped on the front of the

1998 and

later

2001

2003 4.2L BHF: On the right of the intake manifold.

2003 and

later

1.8L 4-cyl 5V Turbo

1.8L

2.8L

1.8L

3.0L

engine lifting eye, which is visible after removing the cover above the fuel injectors. The Code is also printed on a sticker attached to the driver-side cylinder head.

AEB, ATW: On the left side of the cylinder block between the transmission and above the oil filter. Also on a sticker on the timing belt guard. The engine ID is also stamped on the front of the engine mounting bracket (visible after removing cover above fuel injectors).

AFC: On the right-hand side of the engine block between the cylinder head and the power steering pump. Also on a sticker on the drive belt cover.

AHA, ATQ: On the block in front of the right cylinder head. AHA Only: In vehicles with VINs up to 8D-V-205 000, the oil pump

is mounted on the front of the engine and driven directly by the crankshaft. In vehicles with VINs from 8D-V-205 001 on, the oil pump is driven via a chain by the crankshaft and mounted inside the oil pan. Also, oil supply lines are mounted on the camshaft bearing caps.

AMB: On the rear left of the cylinder block. Also on a sticker on the toothed belt guard and stamped on the front lifting eye (visible when engine cover panel is removed).

AVK: Remove the front engine cover; there is a sticker with the engine code and production number on the housing for vacuum diaphragm for intake manifold adjustment. If the sticker is not present and the engine identification is required, remove the rear engine cover; engine codes are stamped on the rear of the cylinder block, left side.

If there is no sticker and the engine identification and production numbers are required, remove the bolts and vacuum diaphragm for intake manifold adjustment. Next, remove the compression spring and move the vacuum diaphragm aside with the lines connected. The engine code and production number are located at the front of the cylinder head, on top.

Operations Identifying the Vehicle

Table 3-2 Audi engine ID code locations (part 2 of 3)

Model Year Engine Code Location

BKB: Unknown at this time. BFB: Unknown at this time. BEX: Unknown at this time. AMB: The engine number can be found on the rear left of the

cylinder block. BPG: The engine number can be found on the joint between

engine/transmission.

ASN: Unknown at this time. BBJ: Unknown at this time. BKH: The engine number is located on the front of the cylinder

block below the right cylinder head.

BHF: A sticker arrow with engine code and serial number is located on the intake manifold on th e ri ght side.

APB, AHA, ATQ: On the machined surface on the cylinder block, at the front of the right cylinder bank.

ART, AWN, BBD: On the left side of the cylinder block. Also on a sticker on the belt cover.

AVK: Remove the front engine cover; there is a sticker on the housing for the vacuum diagram for intake manifold adjustment. Also if the rear engine cover is removed engine codes are stamped on the rear of the cylinder block, lef t side .

AWN: Unknown at this time. BBD: The engine number is located at left on the cylinder block. ASN: Unknown at this time. BBJ: Unknown at this time. BKH: The engine number is located on the front of the cylinder

block below the right cylinder head.

ANK: Unknown at this time. ASG: Unknown at this time. BNK: A sticker with the engine and serial number is affixed to the

cylinder head cover on the right hand side.

On the right-hand side at the rear of the cylinder head.

AAN:

BCY: On top of the cylinder block. Also on a sticker on the drive

belt cover.

BHT: Unknown at this time. BSB: The engine number is located on the front of the cylinder

block below the left cylinder head.

(continued)

A6/S6

2004 and

later

1998 and

later

2000 and

later

2002 and

later

2004 and

later

Sedan

(1995–97)

Wagon

(1995–98)

2003

2004 and

later

1.8 L

Turbo

1.8 L

Turbo

2.0L

3.0L

3.2L

4.2L BBK: Unknown at this time.

4.2L

2.7L, 2.8L

4.2L

3.0L

4.2L

3.0L

3.2L

2.7L BES: Unknown at this time.

4.2L

2.2L AAN: On the right-hand side at the rear of the cylinder head.

2.7L BEL: On the cylinder block at the front of the right cylinder bank.

2.2L

2.7L BEL: On the cylinder block at the front of the right cylinder bank.

4.2L BAS: On the right-hand side at the rear of the cylinder head.

4.2L BFM: The engine number is located at left on cylinder block.

6.0L

Operations Identifying the Vehicle

Table 3-2 Audi engine ID code locations (part 3 of 3)

Model Year Engine Code Location

4.2L

A8/S8

3.7L, 4.2L

Cabriolet 2.8L

1.8L

2000

2.8L

2004 and

later

2003 and

earlier

2004 and

later

1.8L

Turbo

3.0L

4.2L

1.8L, 3.2L

1.8L BAM: Unknown at this time.

3.2L

AKB, AUX, AYS: On the left side of the cylinder block. Also on a sticker on the belt cover.

ABZ, AEW: On the left side of the cylinder block directly above the power steering pump. Also on a sticker on the toothed belt guard.

AAH, AFC: On the right-hand side of the engine block between the cylinder head and the power steering pump. Also on a sticker on the drive belt cover.

AEB, ATW: On the left side of the cylinder block between the transmission and above the oil filter. Also on a sticker on the timing belt guard and stamped on the front of the engine mounting bracket (visible after removing cover above fuel injectors).

AFC: On the right-hand side of the engine block between the cylinder head and the power steering pump. Also on a sticker on the drive belt cover.

AHA, ATQ: On the flat surface of the cylinder block in front of the right cylinder head.

AHA Only: In vehicles with VINs up to 8D-V-205 000 the oil pump is mounted on the front of the engine and driven directly by the crankshaft. In vehicles with VINs from 8D-V-205 001 on, the oil pump is driven via a chain by the crankshaft and mounted inside the oil pan. Also, oil supply lines are mounted on the camshaft bearing caps.

AMB: Unknown at this time. BKB: Unknown at this time. BFB: Unknown at this time. ASN: Unknown at this time. BGN: Remove the front engine cover; there is a sticker on the

housing for the vacuum diagram for intake manifold adjustment. Also if the rear engine cover is removed engine codes are stamped on the rear of the cylinder block, lef t side .

BBJ: Unknown at this time. AVK: Remove the front engine cover; there is a sticker on the

housing for the vacuum diagram for intake manifold adjustment. Also if the rear engine cover is removed engine codes are stamped on the rear of the cylinder block, lef t side .

BBK: Unknown at this time. BHF: On the right of the intake manifold.

AMW, ATC, AWP, BEA, BHE: At the front next to the joint between

engine and transmission. Also on a sticker on the cylinder head cover.

BHE: The engine number can be found on the joint between engine/transmission.

Operations Connecting to a Vehicle

NOTE:

IMPORTANT:

3.1.2 V ehicle Identification

If you are powering up the scan tool after just installing the Volkswagen/Audi software, or if you exited from the Current Vehicle Identification screen, the Software Selection screen displays.

z To enter vehicle identification:

1. Select to continue. The Manufacturer Selection menu displays.

2. Either select Audi or scroll and select Volkswagen from the menu. The mode menu displays.

i An Expert Mode button may also display during vehicle identification. Expert Mode is an

alternative diagnostic strategy that more closely resemble s the factory tool , refer to “Chapter 4 Expert Mode” on page 18 for instructions on using Expert Mode.

3. Select Vehicle Selec tion from the mode. A market selection screen displays that allows you to choose between models built for

operation in the United S tates (US) or Europe (Euro).

4. Select a market option and the model year menu d isplays.

5. Select the correct year for the vehicle. The model menu displays.

6. Select the model of the test vehicle. Identification screens varies from this point depending on the e quipment options available for

the selected model. The screen instructions guide you throug h the selection p rocess.

7. Enter any further VIN character requests and answer an y yes or no qu estions. At the end of vehicle identification, the scan tool displays the complete model a nd engine

identification.

8. If the ID is correct, continue to store the identification in memory. If the ID is not completely correct, exit to return to the star t of t he ide ntif ica tion s teps.

3.2 Connecting to a Vehicle

Once a vehicle has been identified, a scan tool connection message appears, instructing yo u to use the supplied vehicle test adapters to connect the sca n tool for testing.

Before connecting the scan tool to 1997 and later vehicles, read “The Af termarket Radio Problem” on page 154 in order to avoid seriously damaging your scan tool.

The following adapters are available to connect the scan too l to VW/Audi vehicles:

• VW-1—test adapter for 1991–94 VW and Audi vehicles. Hooks up to the white/black

connector only (Connector for 1991–94 vehicles requires VW1 adap ter).

• DL-16—test adapter with Personality Key S-7 for 1994 and late r vehicles (DL) . This OBD-II

style connector is used for all vehicles. The S-44 key is used for CAN communications.

Operations Connecting to a Vehicle

NOTE:

Figure 3-2 VW-1 adapter

Figure 3-3 DL-16 adapter with S-7 Personality Key

The following vehicle connectors are found on VW/Audi vehicl es.

1— White connector 2— Blue (“K”) 3— Yellow (“L”) 4— Black connector 5— Red (+12) 6— Black or Brown (ground)

Figure 3-4

Connector for 1991–94 vehicles, requires VW-1 adapter

i There may be other connectors with the white/black connector . Audi may have a yellow (A/T blink

codes) or blue (not used) connector, and VW may have a red connector for Airbag I system s. It may be possible to hook the white connector of the VW-1 adapter to these other connectors and read codes (without definitions).

Operations Connecting to a Vehicle

12345678

9 10111213141516

Figure 3-5 16-pin OBD-II connector, requires DL-16 adapter

Refer to Table 3-3 for Volkswagen diagnostic co nnecto r locatio ns and to Table 3-4 for Audi diagnostic connector locations.

Follow the on-screen connection instructions to connect to th e vehicle .

Table 3-3

Winnebago

Volkswagen diagnostic connector locations (part 1 of 2)

Model Year Connector Location

On the instrument panel center section, on the right side of the

Cabrio 1994–97

Cabriolet

Corrado All

Eurovan

Camper &

Rialta

Fox

1991–93

(California only)

1992–93

1994

1995–2003 Under the steering column.

1995

1991–93

(California only)

ashtray, behind the cover. To access, remove the ashtray and slide the cover off.

Manual transmission: On the center console under the shifter boot. To access, pull firmly to dislodge the boot.

Automatic transmission: On the center console under the selector indicator cover. To access, remove the handle from the shifter, and then unsnap the indicator cover. The shifter can also be lifted up and turned without removing the handle.

Manual transmission: On the center console under the shifter boot. To access, pull firmly to dislodge the boot.

Behind the parcel shelf. To access, release the catch button, pull the shelf out from top, and lift out.

One of three locations: (1) behind the fold-down storage panel in front of the relay/fuse panel, (2) behind the panel in the dashboard, or (3) under the steering column.

Behind the parcel shelf. To access, release the catch button, pull the shelf out from top, and lift out.

On the center console under the shifter boot. To access, pull firmly to dislodge the boot.

Operations Connecting to a Vehicle

Table 3-3 Volkswagen diagnostic connector locations (part 2 of 2)

Model Year Connector Location

Manual transmission: On the center console under the shifter

boot. To access, pull firmly to dislodge the boot.

1990–92

1993

Golf/Jetta/GTI

1994

1995–97

1998–2004

1993–94

Passat

1995–97

1998–2005

New Jetta 2004-2005 Connector located near bonnet release handle.

Touareg 2004-2005 Connector located near bonnet release handle, behind cover. Phaeton 2004-2005 Connector located near bonnet release handle.

New Beetle 1998-2005 Connector located near bonnet release handle.

On the instrument panel center section, below the heater controls behind the blank switch covers.

One of two locations: (1) on the instrument panel center section, below the heater controls behind the blank switch covers, or (2) on the instrument panel center section, on the right side of the ashtray, behind the cover.

On the instrument panel center section, on the right side of the ashtray, behind the cover. To access, remove the ashtray and slide the cover off.

One of two locations: (1) below the dashboard near the hood release, or (2) on the instrument panel center section, below heater controls behind blank switch covers.

Manual transmission: On the center console under the shifter boot. To access, pull firmly to dislodge the boot.

On the instrument panel, on the right side of the steering wheel, behind the cover.

One of two locations: (1) below the dashboard near the hood release, or (2) between the front seats near the parking brake under a rubber cover.

Table 3-4 Audi diagnostic connector locations (part 1 of 2)

Model Year Connector Location

One of two locations: (1) in the fuse box under the hood near the

100/A6 1992–97

200/V8 1990–94

firewall, or (2) between the front seats near the parking brake under a rubber cover.

One of three locations: (1) under the carpet in the passenger side footwell (2) in the fuse box under the hood near the firewall (3) between the front seats near the parking brake under a rubber

cover.

Operations Selecting a System

NOTE:

Table 3-4 Audi diagnostic connector locations (part 2 of 2)

Model Year Connector Location

90 1993–95 In the fuse box under the hood near the firewall.

A3 1997–2003 Under the dashboard.

A6/Allroad/S6/

RS6

A8 1997–2005 Under the dashboard.

Cabriolet

S3 1999–2003 Under the dashboard.

S4/S6 1992–95

S4/RS4

S8 2001–02 Under the dashboard. TT 2000–03 Under the dashboard.

1996–2001

2002–05 Under the dashboard.

1998–2005

1994–1999

2004-2005 Connector located near bonnet release handle.

2000–02

2003 Under the dashboard.

One of two locations: (1) under the dashboard, or (2) under the sliding cover in the rear ashtray.

One of two locations: (1) under the dashboard, or (2) between the front seats near the parking brake under rubber cover.

One of three locations: (1) in the fuse box under the hood near the firewall, or (2) under the sliding cover in the rear ashtray, or (3) under the dashboard.

One of two locations: (1) in the fuse box under the hood near the firewall, or (2) between the front seats near the parking brake under a rubber cover.

One of two locations: (1) under the dashboard, or (2) under the sliding cover in the rear ashtray.

Note the following when connecting to VW/Audi vehicles:

• “Bonnet” is European for hood.

• Do not assume that the scan tool ID screen is correct if the scan tool communicates. If there

are multiple selections, the scan tool will automatically identify the electronic control module, which means that scan tool communication does not dep end on a cor rect engine ID cod e selection.

3.3 Selecting a System

Once you have confirmed a vehicle identification and connected to a vehicle (see previous sections), the Select System menu displays.

The items that appear on this menu vary dependi ng on the veh icle you are te sting, howe ver, not all of the systems will be present—some of them are optional and others are mutually exclusive. For example, when an integrated immobilizer is present, there will be no separate immobilizer available.

i Some early control modules may require an engine speed below 2000 RPM and a closed throttle

(closed CTP switch) to initialize communication. However, once communication has initialized, higher engine speeds have no effect.

Operations Selecting a System

The following systems can be selected for VW/Audi vehicles:

• Engine Management

• Electronic Instrument Panel

• Abs/eds/esp/tcs

• Airbag/pretensioners

• Airbag USA Golf-cabrio

• Air-conditioning

• Alarm System Interior

• Audio System

• Automatic Transmission

• Central Door Lock System

• Immobilizer (Separated)

• Immobilizer (If Not Separated)

• Steering Whee l Electronics

• Steering Help ( Sep ar ated)

• Steering Help (If Not Separated)

• 4wd Electronics

• Comfort Systems

• Seat Adjustment Driver’s Side

• Seat & Mirror Adjusting

• Central Electronic Unit

• Can Bus Interface

• Add. Heater/parking Heater

• Electronic Level Control

• Level Control Xenon Lights

• Tire Pressure Monitoring

• Parking Help

• Radio

• Navigation Systems

• Electronic Roof Control

• Distance Control

• Suspension Electronics

• Back Spoiler

• Emergency Control

• Speech Control

• Light Control Left

• Light Control Right

• Auto Light Switch

Note the following when selecting a VW/Audi system for testing:

• If a system is listed on the Select System menu, that does not mean it is installed on the

vehicle. To determine the inst alled systems, perform an Au tomatic System Test in Expert Mode (see “00-Automatic System Test” on p age20).

Operations Demonstration Programs

• “Separated” means a standalone control module . “Not Sep arated” me ans that the system is

integrated with another control module.

• The 25-Immobilizer (Separated) and 44-Steering Help (Sep arated) systems can give the

following ECU identification: “Bitte Adresse 17 eingeben”. This means that the selected system is integrated in the instrument panel and that you n eed to select 17-Electro nic Instrument Panel for diagnostics. Although it is possible to continue and select the functions, the information retrieved is not valid.

• The numbers that precede each system selection (for example, “0 1” in front of “Eng ine

Management”) are for use with the manufacture r scan tool only. These numbe rs are not used for Snap-on

scan tool operations.

z To select a system for testing:

1. Select the system you would like to test. An instructions screen displays.

2. Follow the on-screen instructions to continue. The Connection In Progress screen displays while the scan to ol attempt s to commu nicate

with the vehicle.

3. When the scan tool communicates with the vehi cle, accept the default s until the Main Menu displays.

3.4 Demonstration Programs

The Volkswagen/Audi software cont ains programs that demonstrate test capabilities without connecting to a vehicle. The demonstration program can help you become familiar with scan tool menus and operations by providing mock data a nd test results for a sample vehicle ID.

The demonstration program is accessed at the vehicle identification phase of scan tool operations.

z To access a demonstration:

1. Select Demonstration US. A screen displays, prompting you to identify a vehicle with “Demo” on line 1.

2. Select the defaults until the System Selection menu displays. You are now in demonstration mode.

Chapter 4 Expert Mode

IMPORTANT:

01-Read ECU Identification 02-Check DTC Memory 03-Actuator Tests 04-Basic settings 05-Clear DTC Memory 06-Stop Communication 07-ECU Coding 08-Read Measuring Value Block 09-Read ADC Channel 10-Adaptation 11-Login Request 15-Check readiness Code Setting 16-Security Access

Select a System to Test

Connect to the Vehicle

Select Expert Mode

Select a Function

In addition to providing the same capability as standard or vehicle ID mode, Expert Mode has enhanced factory tool capabilities, giving the user special functions, such as setting adaptations and control module coding. Scan tool display screens in Expert Mode give n o information ab out the specific procedures nor how to perform these special functions. Aftermarket information is limited in performing these functions. Expert Mode should only be used if the user is experienced in Volkswagen or Au di diagn ostics and has th e require d info rmation.

It is possible to change and clear system settings with this function. Some functions can be disabled and/or the control module could be corrupte d by incorrect u se!

Expert Mode functionality in this manual describes only the basic operation of some of the capabilities. Factory procedures for specific vehicles and systems must be followed to prevent any damage or inadvertent change in critical driveability , security and safety settings. For example, adaptation functions can disable or enable airbags, a major liability to a shop should there be a future accident with this vehicle.

4.1 Using Expert Mode

This section explains how to start using Expert Mode. The following is an outlin e of scan tool Expert Mode operation, starting with identifying the vehicle. Step 2 is described in “Chapter 3 Operations” on page 4.

Figure 4-1

Expert Mode basic operations

Expert Mode Using Expert Mode

NOTE:

The remaining steps are described in greater detail in this chapter.

1. Select Expert Mode—Instead of selecting Vehicle Systems US as you wou ld for st and ard scan tool operations, select Expert Mode. See “Initiating Exper t Mode” on page 19.

2. Connect the scan tool—Follow the connection instructions displayed after selecting Expert Mode to connect the scan tool with the vehicle. See “Connecting to a Vehicle” on page 1 1.

3. Select the system—Enter the system to be tested (engine, transmission, ABS, etc.). See “Selecting a System” on page 19.

4. Select the Expert Mode function—The scan tool d isplays th e functions ava ilable on the identified vehicle electronic control module. Select the appropriate functions for the vehicle you have identified. See “Expert Mode Function Selection Men u” on page 20.

4.1.1 Initiating Expert Mode

After you have selected a manufacturer, you can initiate Expert Mode.

z To initiate Expert Mode:

1. Select Expert Mode. A warning screen displays.

2. Select to continue. Instructions to connect the scan tool to the vehicle display. See “Connecting to a Vehicle” on page 11 for information about conn ecting the sca n tool to

VW/Audi diagnostic connectors, or ID the vehicle in standard mode (see “Iden tifying the Vehicle” on page 4) until model-specific connection instructions display.

3. Connect to the correct diagnostic connector on the vehicle, then continue. The System Selection menu displays.

4.1.2 Selecting a System

There are two special items on the Expert Mode System Sele ction menu that do not display on the standard System Selection menu:

• 00-Automatic System Test

• 01-Engine Management Master (1 1-Engine Management Slave is not used for US vehicles)

The rest of the items on the menu are the same as in st anda rd mod e (“Selectin g a System” on page 15).

z To select a system for testing:

1. Select the system you would like to test. The communication instruction screen displays.

i Selecting 00-Automatic System Test displays a different screen (see 00-Automatic Syste m Test).

2. Select to continue. A warning message displays.

Expert Mode Using Expert Mode

NOTE:

3. Select to continue. The scan tool displays the vehicle’s electronic control module identificatio n.

4. Select to go to the Expert Mode Function Selection menu (see “Expert Mode Function Selection Menu” on page 20).

00-Automatic System Test

The Automatic System Test is always the first menu choice in Expert Mode. This selection interrogates all installed controllers and automatically prints out all control module IDs and any DTCs stored there.

i A printer must be connected for an Automatic System Test to run.

This test may take ten minutes or longer depen ding on the number of control modules. DTCs may be set in multiple controllers, therefore, all control modules need to be checked fo r DTCs and have DTCs cleared after repairs. Automatic System Test is a good wa y to know wh ich contro llers are installed on the vehicle and to obta in DTC information .

z To perform an Automatic System Test:

1. Select 00-Automatic System Test from the System Selection menu. A screen displays, prompting you to select Y to begin the test or N to return to the previous menu.

2. Select to begin the Automatic System Test. The Printing in progre ss screen d isplays.

The scan tool prints the result when the test is finished.

4.1.3 Expert Mode Function Selection Menu

When the scan tool has established a connection with the ve hicle, the scan tool displa ys a Function Selection menu, such as the Expert Mode Function Selection me nu.

The Expert Mode Function Selection menu allows you to select from the fo llowing gen eral functions:

• 01-Read ECU Identification—displays the control module identification string, the control

module coding, and Work Shop Code (see p age 21).

• 02-Check DTC Memory—displays all current diagnostic trouble cod es present ( see

page 22).

• 03-Actuator Tests—activates dif ferent actuator tests fo r about 30 seconds in sequence (se e

page 22).

• 04-Basic Setting—performs a Basic Setting, depending on the entered block number

(000-255) (see page 22).

• 05-Clear DTC Memory—clears any existing trouble codes and checks if the trouble codes

are really cleared (see page 22).

• 06-Stop Communication—stops the commun ication and exits Expert Mode (see page 22).

• 07-ECU Coding—changes the existing control module coding by entering a new coding (see

page 23).

Expert Mode Using Expert Mode

NOTE:

• 08-Read Measuring V alue Block —displays measur ing value blocks a f te r entering a valid

block number (see page 23).

• 09-Read ADC Channel—displays data from a single ADC channel (see page 27).

• 10-Adaptation—changes adapt at ion values from th e control m odule (se e p age 27).

• 11-Login Requ est—performs a login request to the control module afte r entering a valid login

code (see page 28).

• 15-Check Readiness Code Setting—displays a readiness code and whether it is set or not

(see page 28).

• 16-Security Access— performs a security access request to the control module (see

page 29).

Note the following when using Expert Mode:

• There is no Custom Setup available in Expert Mode ( for example, yo u cannot cha nge th e

temperature readings from Celsius to Fahrenheit).

• There are no Movie or Print Frame options, only Print Scr een and Pr int Codes. Printe r

communication settings must be configured in standard mode using vehicle ID or in Demonstration mode to have the possibility to print. Expert Mode also will not work with Snap-link™ or ScanGrafix PC graphing programs.

• When using Expert Mode, supplemental informa tion found in VAG service manua ls is

necessary to interpret displayed data values and to kn ow the prop er pr ocedure to perfor m a specific test, coding, or adaptation.

01-Read ECU Information

This function displays the control module identification string, the control mod ule codin g, and Work Shop Code. Also, some systems will display some extra control module identification if selected.

VW/Audi part numbers for this controller conta in a version number for the con troller's interna l firmware. Shop number identifies the Work Shop Code stored in the scan tool that last recoded this control module.

i Some older control modules are not “codeable” and you may see a Bosch part number or other

information in theses fields.

The Extra ECU identification fields can store VIN and immobilizer information on some vehicles.

Work Shop Code

World Wide, every VW/Audi dealer is assigned a unique Work Shop Code (WSC). Factory scan tools require a valid WSC to function, and once it has been entered, it cann ot be chang ed. Whenever a control module is coded, or adaptations are performed, the scan to ol sends its WSC to the control module and the control module records it. If a factory scan tool was used to perform specific functions, such as disabling an airbag through the WSC, it may be possible to identify which dealer performed this procedure.

Expert Mode Using Expert Mode

NOTE:

IMPORTANT:

i The Snap-on

sends it back unchanged after a procedure ha s been pe rformed .

V AG so f tware does n ot change o r al ter the WSC. It reads the existing WSC and

02-Check DTC Memory

This function displays all diagnostic trouble codes (DTCs) curren tly presen t or stored in memory.

03-Actuator Tests

This function activates different actuator test s for about 30 secon ds in sequence, or depending on the ECU you may select which available test to run. The user can abort or continue to the next test.

Some tests display a command to the user . For example, if “Press Brake Peda l” displays, the user has to press and hold the brake pedal and then continue. The sequence, number , and type of tests are dictated by the control module.

T o perform the actuator tests, the entry conditions must be correct. For the correct entry conditions refer to the V AG system specific workshop manual. On some systems, the actuator tests cannot be restarted until the ignition key is switched of f fo r some time. Alte rnativel y, briefly star t and run the engine, shut down, turn the ignition to the run position, then re-initiate the actu ator tests.

04-Basic Settings

This function can put a system in basic mode or performs a Basic Setting. This depends on the entered block number (000–255). After entering a valid block numbe r, data values or text can be displayed. There is no description of the dat a value, only the value and u nit is displayed. For interpretation of the values, refer to the VAG system-specific workshop m anual. See “Basic Settings” on page 45 for more information.

05-Clear DTC Memory

This function attempts to clear all current and stored DTCs. After clearing, the scan tool rechecks for DTCs, and any that reset from current problems will re-display .

06-Stop Communication

This function stops the communication and leaves the Exp ert Mode. If the scan tool ge t s accidently disconnected, go back to the same controller and then exit prope rly using 06. T his is the equivalent of selecting Other Systems in standar d mode.

Always exit out of any one module using 06-Stop Communication before selecting another module. Failure to do so may cause communication problems, corrupt data , or cause a p arasitic draw on the battery.

Expert Mode Using Expert Mode

07-ECU Coding

This function can change the existing control module coding by ente ring a new coding. The range of coding can be 0–127, 0–32767 or 0–1048575. Th e codi ng number can tell a co ntrol mod ule about the configuration, for example, if cruise control is available or not.

After entering a new coding, it is sent to the control module and the scan tool reports if the new coding is accepted or not. A coding will not be accepted if it is an unknown number or if a control module cannot be coded. However, be aware that a control module usually d oes accept an incorrect coding number.

Some special codings require an unlocked control module. The control module can be un locked with a Log-in or Security Access request.

Note the following regarding control module coding:

• The following login information is subject to change and is not guara nteed to work on every

application. A common VW login is 01283; a common Audi login is 13861. Specific vehicle logins are found in that vehicle’s service manual.

• 2002 vehicles using the new CAN Bus communication network may not require control

modules to be version coded, as the version coding information is obt ain ed from th e other controllers sharing the CAN Bus. However, if the engine control module is replaced it will need to be adapted to the immobilizer (see “Testing Immobilizer Systems” on page 75).

08-Read Measuring V alue Block

This function displays measuring value blocks. After entering a valid block number, data values or text are displayed. There is no description of the data value, only the value a nd unit i s displayed. For interpretation of the values, r efer to the VAG system specific workshop manua l. Press N to enter the print exit menu. Scroll to change the block number . The disp layed data is the actual dat a received from the control module.

VW/Audi Display Group Data

Instead of one long data list, VW and Audi data is or ganized into display g roup s (Table 4-1). However, these groups are not determined by a scan tool. Instead, these are manufacturer predetermined groups which change depe nding on the vehicle an d engin e. Table 4-1 provides some examples of group categories available on a late model VW and Audi.

Table 4-1

Display Group Number Display Group Category

VW/Audi display group categories (part 1 of 2)

1–9 General engine activity data 10–19 Ignition 20–29 Knock control 30–39 O2 sensor control system 40–49 Three-way CAT 50–59 Engine speed control 60–69 Throttle drive 70–79 Emissions reduction 80–89 S pecial function 90–97 Power increase

Expert Mode Using Expert Mode

NOTE:

Table 4-1 VW/Audi display group categories (part 2 of 2)

Display Group Number Display Group Category

98–100 Compatibility 101–109 Fuel Ignition 110–119 Boost pressure control 120–129 Control unit communication 130–150 Special info

The following sections provide information that give examples of engine data interpretation. Note that data available varies by year, engine, engine code, and management system.

i The display groups available using vehicle ID may vary from the total number o f display gr oup s

available in Expert Mode. Display groups in standard vehicle ID mod e are pre selected b ased on priority of use. All possible display groups can b e viewed using Expert Mode. To view a particular display group in Expert Mode, the specific group number must be ma nually entered .

The following examples may have additional display group s availabl e in Expert Mode.

Example 1: 2002 VW Jetta Drive-by-Wire, Bosch ME 7.5 Control System

Group=1, Basic Functions (1)

•

• Group=2, Basic Functions (2)

• Group=3, Basic Functions (3)

• Group=4, Basic Functions (4)

• Group=5, Operating Mode Engine

• Group=6, Altitude Correction

• Group=10 Ignition

• Group=20, Ignition, Knock Control Cyl 1-4

• Group=22, Ignition, Knock Control Cyl 1+2

• Group=23, Ignition, Knock Control Cyl 3+4

• Group=28, Knock Control

• Group=30, O2 St atu s

• Group=32, Learn Values O2

• Group=33, O2 Regulation Before Cat

• Group=37, Diagnose O2 Control System

• Group=41, O2 Sensor Heater

• Group=50, Idle Spe ed Control

• Group=54, Idle Spe ed Control

• Group=55, Idling Stabilization (1)

• Group=56, Idling Stabilization (2)

• Group=60, Adaptation Epc-system

• Group=61, Epc-system (1)

• Group=62, Epc-system (2)

• Group=99, O2 Loop

Expert Mode Using Expert Mode

Example 2: 2002 Audi TT Drive-by-Wire, Bosch ME 7.1 Control System

•

Group=1, Basic Functions (1)

• Group=2, Basic Functions (2)

• Group=4, Basic Functions (3)

• Group=5, Basic Functions (4)

• Group=6, Basic Functions (4)

• Group=10, Ignition

• Group=22, Ignition, Knock Control Cyl 1+2

• Group=23, Ignition, Knock Control Cyl 3+4

• Group=28, Diagnose Knock Sensors

• Group=30, O2 St atu s

• Group=32, Learn Values O2

• Group=33, O2 Regulation

• Group=41, O2 Sensor Heater

• Group=50, Idle Spe ed Control

• Group=54, Idle Spe ed Control

• Group=55, Idling Stabilization

• Group=56, Idling Stabilization

• Group=60, Adaptation Epc-system

• Group=60, Throttle Valve Adjuster

• Group=61, Throttle Valve Adjuster

• Group=62, Epc-system

• Group=63, Kickdown Function

• Group=66, Cruise Control S t atus

• Group=99, O2 Loop

• Group=113, Control Turbo Pressure

• Group=114, Control Turbo Pressure

• Group=115, Control Turbo Pressure

• Group=117, Control Turbo Pressure

• Group=118, Control Turbo Pressure

• Group=120, Tcs System

• Group=125, Can Bus Communication

Example 3: Motronic 2.9 (1993–1995)

Display group 000 has 10 channels or display fields, listed below.

1. Coolant temperature

2. Engine load

3. RPM

4. O2 factor

5. Idle Adapt

6. Part throttle adapt

7. Low load adapt

Expert Mode Using Expert Mode

8. IAC adapt

9. Not used

10. IGN timing The display fields are output in binary numbers. To understand the binary number, visualize a

clock with 0 at the top center. The number 12 8 is at the center bottom. The binary clock coun t s from 0 to 255, a rich/lean correction from base midpoint (0).

In binary output 0–255, based on O2S output, numbers fluctuate between rich (high num bers) and lean (low numbers).

The number can theoretically range from 0 to 255 with 0 as the mid p oint. A numbe r of 13 to 128 indicates that the control module has commanded an overall lean mixture correction. A number of 128 to 243 indicates that the control module has commanded an overall rich mi xture corr ection.

Example 4: Late Model Motronic 7.5

The following example concerns display group 000 for 1 -bank systems:

1. Engine coolant temperature

2. Load

3. RPM

4. Voltage

5. Throttle valve potentiometer

6. Idle air control valve

7. Idle air control valve learning value

8. Lambda control

9. Lambda control learning value idle

10. Lambda control learning value partial load Display group 000 for 2-bank systems:

1. Engine coolant temperature

2. Load

3. RPM

4. Throttle valve angle

5. Idle air control

6. Idle air control valve learning value

7. Lambda control Bank 1

8. Lambda control Bank 2

9. Lambda adaptation (add) Ban k 1

10. Lambda adaptation (add) Bank 2

Example 5: Central Electronic Unit (09)

The four display fields for display group 012 indicate the following:

• Display field 1: Check bus—This field indicates whether the data bus is OK or faul ty (e.g.

fault in single wire).

Expert Mode Using Expert Mode

NOTE:

IMPORTANT:

• Display field 2: Equipment front—This field indicates which front control units are fitted and

participate in data transfer.

• Display field 3: Equipment rear—This field indicates which rear co ntrol unit s are fitted a nd

participate in data transfer.

• Display field 4: Accessories—This field indicates whether the seat and mirror adjustment

memory system is fitted. Both sy stems (convenience system and memory system) interchange data.

i Inter-module CAN data transfer currently cannot be checked.

09-Read ADC Channel (Except KW20001)

This function displays data from a single ADC channel. This function allows you to look at r eal-time data from control modules that support it. Currently, this dat a ha s no interp ret ation or scaling information.

z To set the Read ADC Channel function:

1. Enter a valid channel number A number from 0 to 65535 displays.

2. Scroll to change the channel number.

10-Adaptation

This function can change adaptation values from the control module and allows you to alter certain values and/or settings in control modules which support it.

Function 10 changes baseline settings. Do not proceed with this function unle ss you kn ow the exact procedure. Be aware that some Channels may not be documented.

Examples of things you can do with the adaptation selection:

• Alter the Idle Spee d (e.g., 01- Engine Manag ement > 10-Ada pt ation > 000 /000 1).

• Change the Service Intervals and resetting the Serv ice Remind er In dicators (n ewer

instrument clusters).

• Disable/enable various components of the airbag (SRS) system.

• Change the sensitivity of the Interior Monitor (Sonar Scan) component of the alarm system in

many newer Audi models.

• Swap control modules and rematch keys (newer immobilizer-equipped cars).

• Select certain Central Locking options in newer vehicles.

“KW2000” stands for Key Word 2000, and refers to a communication protocol which was used beginning in 2002 on limited vehicles, such as the VW Passat 1.8L turbo, the Audi A4 1.8L and 3.0L, and the Audi A6 3.0L.

Expert Mode Using Expert Mode

NOTE:

T o ch ange ada ptation values:

1. Read the adaptation.

2. Test the adaptation.

3. Save the adaptation.

T o se t an ada ptation:

1. Select a valid channel. The actual adaptation value is displayed. On some adaptation channels, there will be data

displayed on the last line.

2. Scroll for manual input. The new adaptation value can be te sted or changed. For example, the engine speed is raised

to numbers greater than 128 or lowered to numbers le ss than 12 8.

3. To exit and store a new value, select to confirm or abort. Selecting channel 000 clears all adaptation valu es af ter confir ming the r equest.

1 1-Login Request (Except KW2000)

This function performs a login request to the control module. After entering a valid login code, the control module is ready to perform a special coding or ada pt ation function .

Used on some (mostly 1996 and later) control modules, Login Request is necessary before you can recode or change adaptation values. On others, it “enables” certain features like cruise control. Valid login codes can be found in the workshop manual for the car.

The following login information is subject to change and is not g uaranteed to work o n every application:

• A common VW login is 01283

• A common Audi login is 13861

i You get on ly one chance to enter the corr ect login number . If you enter the wrong number , turn off

the ignition and wait 10 seconds before another attempt.

1 1-ECU Coding 2 (KW2000 Only)

This function can change the special control module coding b y entering a new valid cod ing.

15-Check Readiness Code Setting (Except KW2000)

If the system has a readiness code, this function displays that readiness code and whether it is set or not. If the system has no special readiness block, sometimes the same information can be found in function 08 by selecting group 86 and checking Channel 1 .

Expert Mode Te stin g i n Ex pert Mode

NOTE:

16-Security Access (KW2000 Only)

This function performs a security access request to the control mo dule. After entering a valid code, the control module is ready to perform a special coding or ad apt ation func tion.

Note the following when using 16-Security Access:

• The Snap-on scan tool currently performs only 5-digit security codes.

• Some early systems cannot communicate if the engine is running.

• Some early systems cannot communicate or communication is lost if engin e or vehicle speed

exceeds a certain specification. Refer to the VAG system-specific manual for details.

4.2 Testing in Expert Mode

The functions available depend on the communication prot ocol. Functions that ca n be execute d depend on the system and entry conditions. Some functions need a logi n or security access before executing the particular function. Not all systems support all functions.

i The 25-Immobilizer (Separated) and 44-Steering Help (Separated) systems give the following

control module identification: Bitte Adresse 17 eingeben. Although it is possible to continue and select the functions, the information retrieved is not valid and should b e discarded. The selecte d system is integrated in the instrument panel. Please select 17 -Electronic Instrument Panel for diagnostics.

For more testing information, see “Chapter 5 Testing” on page 30.

Chapter 5 Testing

This chapter provides information and procedures for using the scan to ol with specific contro l systems. Control systems discussed in this chapter are:

• T est ing Engine Syst ems, on page 32

• T est ing Transmission Systems, on page 53

• T est ing Electron ic Thrott le Systems, o n p age67

• T est ing ABS Syst ems, on p age 72

• T est ing Immobilizer Systems, on p age 75

• T est ing Electron ic Inst rument Panel Sy stems , on p age83

• T est ing Airbag (SRS) Sys tems, on p age 88

• T est ing CAN Data Bus Systems, on page 89

5.1 VW/Audi Sof tware Application List

Table 5-1 provides VW/Audi systems covered by the scan tool.

Table 5-1

ABS/EDL/ESP/TCS Standard & Expert Mode Expert Mode Only

Add. Heater/Parking

Airbag/Pretensioners

Alarm System Interior

Automatic Transmission Standard & Expert Mode

CAN Bus Interface

Central Door Lock

Central Electronic Unit

VW/Audi software application list (part 1 of 2)

Control Systems Codes Data Advanced Functions

heater

Air-conditioning

Anti-slip Control

Audio System

Auto Light Switch

Back Spoiler

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Expert Mode Only Expert Mode Only

Testing VW/Audi Software Application List

Table 5-1 VW/Audi software application list (part 2 of 2)

Control Systems Codes Data Advanced Functions

Clutch Electronics

Comfort Systems

Distance Control

Electronic Instrument

Panel

Electronic Level Control

Electronic Roof Control

Emergency Unit

Engine Management Standard & Expert Mode

Immobilizer

Level Control Xenon

Lights

Light Control Left

Light Control Right

Navigation

Parking Help

Radio

Seat Adjustment

Driver Side

Seat and Mirror

Adjustment

Speech Control

Steering Help

Steering Wheel

Electronics

Suspension Electronics

Tire Pressure

Monitoring

4WD Electronics

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Standard & Expert

Mode

Expert Mode Only Expert Mode Only

Expert Mode Only

Expert Mode Only Expert Mode Only

Standard & Expert

Mode

Testing T esting Engine Systems

5.2 Testing Engine Systems

The following sections contain scan tool testing information for en gine systems. Testing Engine Systems first lists the VW/Audi engines that communicate with the scan tool, and continues to provide procedures and tips for certa in testi ng functions.

5.2.1 VW/Audi Application Coverage

The following sections contain US vehicle coverage for 19 91–20 05 VW a nd Audi.

Table 5-2

CIS-E or K-Jetronic/CIS (1990–92) Digifant 1 (CA only) (1991–93) Motronic M2.9 (1993–95) Motronic M5.9 (1995–2000) Motronic M5.9.2 (1997–2005) Motronic M7.0 (1999–2001) Motronic M7.1 (2000–01) Motronic M7.1.1 (2002–05) Motronic M7.5 (2001–05) Motronic M7.5.1 (2002) Diesel TDI (1996–2003)

VW/Audi application coverage

Volkswagen Audi

CIS-E or K-Jetronic/CIS (1990–92) MPI (1990–95) Motronic M2.3 (1991–94) Motronic M2.3.2 (1993–95) Motronic M2.4 (1990–94) Motronic M2.9 (1993–95) Motronic M5.4.2 (1995–96) Motronic M5.9 (1996–98) Motronic M5.9.2 (1998–2000) Motronic ME7.1 (2000–01) Motronic ME7.5.1 (2002–03)

US Volkswagen Application Coverage

Table 5-3 provides application coverage for US V o lkswagen e ngines.

Table 5-3 US VW application coverage (part 1 of 4)

Model Year Volume

Cabriolet (15) 1990–92 1.8 2H YES CA Only Cabriolet (1E) 1995–2001 2.0 ABA YES Cabriolet (1V) 2000–02 2.0 ABA YES

Corrado (50)

Eurovan (70)

Fox (30) 1991–93 1.8 ABG YES CA Only

1992–1995 2.8 AAA YES

1991–92 1.8 PG G60 YES CA Only 1992–95 2.5 AAF 5L YES

1995 2.5 ACU 5L YES

1997–2000 2.8 AES VR6 YES

2001–04 2.8 AXK VR6 YES

Engine

Code

Engine Info Supported Notes

1992 Canada

Only

1995 Only

Winnebago/

Rialta

Testing T esting Engine Systems

Table 5-3 US VW application coverage (part 2 of 4)

Model Year Volume

Golf/Jetta/GTI

(1G) MK II

Golf/Jetta/GTI

(1H) MK III

Golf/Jetta/GTI

(1J) MKIV

New Beetle

(1C)

1991–92

1993–99

1993–97 1.8 ACC YES Canada Only

1998–99 1.9

1999–2002 2.8 AFP VR6 YES 1999–2001 2.0 AEG YES 1999–2003 1.9 ALH TDI YES

2000–01 1.8 AWD Turbo YES

2001–03

2002 2.8 AFP VR6 YES

2003–05

2004–05

1999–2000 1.8 APH Turbo YES

2001–05 1.8 AWV Turbo YES 1998–2005 1.9 ALH TDI YES 1998–2002 2.0 AEG YES

2000–03 2.0 AVH YES

2001–05 2.0 AZG YES

2003 2.0 BDC Convertible YES

2004–05

2.0 9A 16V YES

1.8 PF NO

1.8 RV YES CA Only

2.8 AAA VR6 YES

2.0 ABA YES

2.0 AVH YES

1.8 AWW Turbo YES

1.8 AWP Turbo YES

2.0 AZG YES

2.0 BBW SULEV YES

2.8 BDF VR6 YES

1.8 BEK Turbo YES

1.9 BEW TDI YES

2.0

3.2

1.8

1.9 BEW TDI YES

2.0

Engine

Code

IZ TDI YES

AHU TDI YES

AZG YES BEV YES BER YES

BJS YES BML YES BFM YES

AWU Turbo YES AWP Turbo YES

AZJ YES BDC YES BEV YES

Engine Info Supported Notes

Testing T esting Engine Systems

Table 5-3 US VW application coverage (part 3 of 4)

Model Year Volume

New Beetle

(1C)

(continued)

New Jetta

(9M) MK IV

Passat (31)

Passat (3A)

New Passat

(3B)

2004–05 2.0

1999–2001 1.8 AWD Turbo YES 1999–2005 1.9 ALH TDI YES 1999–2001 2.0 AEG YES

2000–03 2.0

1999–2002 2.8 AFP VR6 YES

2003 2.8 BDF YES

2004–05 1.9 BEW TDI YES

2005 1.9

2000–05 2.0

2004–05 2.0

2003-2005 2.8 BDF YES

2005 2.5

1991–93 2.0 9A 16V YES 1993–94 2.8 AAA VR6 YES 1996–97 1.9 1Z TDI YES

1995–97

1998–99 1.8 AEB Turbo YES

1998–2000 2.8 AHA V6 YES

2000–03 2.8 ATQ V6 YES

1999–2001 1.8 ATW

2003 4.0 BDP W8 YES

2004–05

2.8 AAA YES

2.0 ABA YES

2.0 BHW YES

2.8

4.0 BDN YES

Engine

Code

BER YES

BGD YES

BHP YES

AVH YES AZG YES

BKC TDI YES

BRM TDI YES

AVH YES AZG YES

BBW YES

BER YES BEV YES BHP YES

BGP YES

BGQ YES

BGW YES

AMX YES

BBG YES

Engine Info Supported Notes

Turbo with

variable

valve timing

YES

Testing T esting Engine Systems

Table 5-3 US VW application coverage (part 4 of 4)

Model Year Volume

4.2

Phaeton 2004–05

6.0

3.2

Touarag 2004–05

4.2 AXQ YES

5.0

Engine

Code

BGH YES

BGJ YES BAN YES BAP YES

AZZ YES BAA YES

BKJ YES

AYH TDI YES

BKW TDI YES

Engine Info Supported Notes

VW/Audi On-board Diagnostic Availability: 1990–1995 Gas, 1992–2002 Diesel

The VW/Audi software starts VW/Audi US VIN ID in 1991 (US vehicle systems) and only identifies those vehicles with Codes and Data (does not retrieve blink codes). Table 5-4 on page 36 depicts many early year models with some vehicles having scan tool diagnostics depending o n Emission certification or country, engine system description, including emission certification and early systems without diagnostic capability .

Star ting in 1990, VW and Audi started using digit al engine management systems on some models that were sold only in California.

Note the following when determining diagnostic availability:

• Only some of these early systems may have codes and rapid or serial data.

• There are some early blink code only systems not listed in Table 5-4 on page 36.

• For 1991–93, certain engine codes have d at a on California (CA) models only. Federal

vehicles with the same engine code will display a “no communication” message and an additional message stating “Federal Vehicles are not capable of communicating.” Federal Vehicles may have blin k co des.

• If the underhood emission label is missing, distinguishing between CA or Federal ve hicles

may be difficult. Also, Federal vehicles may still have the white/black diagnostic connector (under shifter boot). This connector ma y not be functional or may be for transmission (4-speed only) or ABS data. Only the 9A Federal emission equipped engine has engine data. To help identify a CA emission engine, check for a functional Malfunction Ind icator Lamp (ignition on , engine off) or check for an exhaust gas recirculation (EGR) valve inst a lled on the engine .

• European IDs can be used where the VIN cannot. The following systems can not be identified

using US VIN ID. Use the alternate IDs below.

– For the 1990 Golf/Jetta/GTI/Corrado/Passat using the 2.0L (9A) with CIS-E Motronic, ID

as a 1991 Passat or use European ID for 1990 Golf or Jetta.

– For the 1993–1994 Golf 1.8L (ACC), ID as a 1995 model year or use European ID and

select 1993 or 1994 Golf 1.8L ACC.

Testing T esting Engine Systems

NOTE:

i The scan tool vehicle ID provides connector messages and system information but because the

control modules are identified automatically , an incorrect VIN or vehicle ID does not stop scan tool communication.

In addition, be aware that Expert Mode can also be used on any vehicle with diagnostic capability and does not require any vehicle ID.

Table 5-4

Model Year

Cabriolet

Corrado

Eurovan

Golf/GTI

Early VW engine system coverage (part 1 of 2)

Fox

Jetta

Engine

Code

1995 ABA 2.0L 4-cyl Motronic M2.9 YES 1990–92 2H 1.8L 4-cyl Digifant California YES 1992–95 AAA 2.8L (VR6) Motronic M2.9 YES 1990–92 PG 1.8L 4-cyl (G60) Digifant California YES

1992–93

1995 ACU

1995–97 AAB 2.4L 5-cyl Diesel Canada NO

1990 JN 1.8L 4-cyl CIS-E (KA Jetronic) NO

1991–93 ABG 1.8L 4-cyl Digifant

1993–97 ACC 1.8L 4-cyl Mono-Motronic Canada YES 1994–95 AAA 2.8L (VR6) Motronic M2.9 YES 1993–95 AAZ 1.9L 4-cyl Turbo Diesel Canada NO

1990–92

1991 PF/RV 1.8L 4-cyl Digifant NO

1993–99

1994–95 AAA 2.8L 4-cyl Motronic M2.9 YES

1993–95

1990–92

1991–92 RV 1.8L 4-cyl Digifant California YES

1990–91

AAF 2.5L 5-cyl Digifant AAB 2.4L 5-cyl Diesel Canada NO

9A 2.0L 4-cyl (16V) CIS-E Motronic YES

PF/RV 1.8L 4-cyl Digifant NO

RV 1.8L 4-cyl Digifant California YES

ABA 2.0L 4-cyl Motronic M2.9 YES

ABA 2.0L 4-cyl Motronic M2.9 YES AAZ 1.9L 4-cyl Turbo Diesel Canada NO

PF/RV 1.8L 4-cyl Digifant NO

9A 2.0L 4-cyl (16V) CIS-E Motronic YES

ME 1.6L 4-cyl Diesel NO MF 1.6L 4-cyl Turbo Diesel Canada NO

1F 1.6L 4-cyl ECO Diesel Turbo NO

Displacement

2.5L 5-cyl

(Winnebago,

Rialta)

Engine

Management

Digifant Tier 1 YES

Emission

Cert. Only

Canada Only

for 1992

California YES

Federal NO

Diagnostics

Scan Tool

YES

Testing T esting Engine Systems

Table 5-4 Early VW engine system coverage (part 2 of 2)

Model Year

1995 ABA 2.0L 4-cyl Motronic M2.9 YES

Passat

Vanagon 1990–91 MV 2.1L 4-cyl Digifant NO

1993–95

1991–94 PG 1.8L 4-cyl (G-60) Digifant Canada NO 1990–93 9A 2.0L 4-cyl (16V) CIS-E Motronic YES

Engine

Code

AAA 2.8L (VR6) Motronic M2.9 YES AAZ 1.9L 4-cyl Turbo Diesel Canada NO

Displacement

Engine

Management

Emission

Cert. Only

Scan Tool

Diagnostics

US Audi Application Coverage

Table 5-5 provides early US Audi engines applications.

Table 5-5 US Audi engine system application coverage (part 1 of 3)

Model Year Volume Engine Info

1986–91 2.2 K-Jetronic MC Turbo NO

1986 2.2 KE-Jetronic KZ NO

1991–95 2.2 Turbo 20V AAN YES

100 S4

200

1986–1990 2.3 KE3-Jetronic NF/NG NO

1990–94 2.8 V6 12V AAH YES

1994 2.8 V6 12V AFC YES 1986–91 2.2 K-Jetronic MC Turbo NO 1989–90 2.2 20V 3B Turbo YES

1988–90

(Type 89)

1992–94

(Type B4)

1988–89

(Type 89)

1992–94

(Type B4)

1993–94

(Type B4)

1987–91 2.3 KE3-Jetronic NG

1988 2.3 20V 7A 1989–93 2.3 20V 7A YES 1992–94

(Type B4)

1993–95 2.8 V6 12V AFC YES

2.0 Motronic 3A

2.3 KE3-Jetronic NG

2.3 20V 7A

2.8 V6 12V AAH YES

2.8 V6 12V AFC YES

2.8 V6 12V AAH YES

Engine

Code

Supported Notes

Manual blink

codes

Manual blink

codes

Manual blink

codes

Manual blink

codes

Manual blink

codes

Testing T esting Engine Systems

Table 5-5 US Audi engine system application coverage (part 2 of 3)

Model Year Volume Engine Info

1995–99 1.8 Turbo AEB YES

2000 1.8 Turbo ATW YES 1994–97 2.8 V6 12V AAH YES 1995–97 2.8 V6 12V AFC YES 1996–97 2.8 V6 30V AHA YES 2000–01 2.8 V6 30V ATQ YES

2002–05 3.0 V6 30V AVK YES

A4/S4

A6/S6

2002–05 1.8 Turbo AMB YES

2001–03 2.7

1.8

2004–05

1993–95 2.8 V6 12V AAH YES 1994–96 2.8 V6 12V AFC YES 1997–99 2.8 V6 30V AHA YES 2000–01 2.8 V6 30V ATQ YES

2000 4.2 V8 ART YES 2000–03 2.7

2000–05

2003–05 4.2 V8

2002–05 3.0

2004–05 2.7

2002–03 4.2 ART YES

2004–05

3.0

4.2

3.0 V6 30V AVK YES

4.2 V8 AWN YES

4.2 V8 BBD YES

4.2 ANK YES

Turbo V6

30V Turbo BEX YES Turbo BFB YES Turbo BKB YES

Turbo V6

30V

Engine

Code

APB YES

ASN YES

BBJ YES BBK YES BHF YES

APB YES

BAS YES BCY YES ASN YES

BBJ YES BEL YES BES YES

ASG YES

Supported Notes

2003 A4

Cabriolet

2003 A4

Cabriolet

Testing T esting Engine Systems

Table 5-5 US Audi engine system application coverage (part 3 of 3)

Model Year Volume Engine Info

1997–99 4.2 V8 ABZ YES

1999-2003 4.2 V8 AKB YES

1997–99 3.7 V8 AEW YES

A8/S8

All-road Quattro

Cabrio

Cabriolet 2004–05

2001–03 4.2 V8 AUX YES

2002–03 4.2 V8

2004–05

2000–03 2.7 1994–95 2.8 V6 12V AAH YES

1994–97 2.8 V6 12V AFC YES

2000–03 1.8 Turbo AMU YES 2000–01 1.8 Turbo ATC YES 2000–03 1.8 Turbo AWP YES

2003 1.8 Turbo BEA YES

2004–05 1.8 Turbo BAM YES

4.2 BFM YES

6.0 BHT YES Turbo V6

30V

1.8 Turbo

3.0

4.2 BBK YES

Engine

Code

ABZ YES AYS YES

APB YES

AMB YES

BFB YES BKB YES

ASN YES

AVK YES

BBJ YES

BEN YES

BHF YES

Supported Notes

Audi Early Model Application 1990–1995

The VW/Audi primary cartridge starts VW/Audi US VIN ID in 1991 (US vehicle systems) and only identifies those vehicles with Codes and Data (does not retrieve b link code s). The mod els in Table 5-6 on page 40 have diagnostic capability with the scan tool.

Testing T esting Engine Systems

Table 5-6

200/2000 Quattro

100/1000 Quattro 1992–94 V6 2.8L 12V AAH MPI

Audi early model application 1990–95

Model Year Displacement

Turbo 20V

V8 Quattro

S4 1993–94 A6 1995

90/90 Quattro 1993–95

Cabrio 1994–95

5.2.2 Clearing Codes

This function attempts to clear all current and stored DTCs. Af ter clearing, the scan tool re-checks for DTCs, and any that reset from current problems will re-display .

z To clear DTCs:

1. From any codes display, press N to display the Exit menu.

2. Select Clear Codes. The Initiate Code Clearing screen displays.

3. Select to initiate code clearing. A code-clearing message displays. This message varies depending on the contr ol module.

4. Select to clear the codes automatically, if applicable for the vehicle under test. The display indicates that codes are cleared by displaying the No Codes screen. If the code-clearing operation fails for any reason, the prev ious codes reappear at the top of

the data list when returning to Codes.

5. Exit to return to the Exit menu and repeat the Clear Codes ope ration if ne cessa ry.

Engine

Code

1991 Turbo 2.2L 20V 3B M2.3

1992–94 V8 4.2L 32V ABH 1990–91 V8 3.6L 32V PT

2.2L AAN M2.3

V6 2.8L 12V AAH MPI

Engine Management

M2.4

z To clear multiple DTCs:

1. Record all codes.

2. Clear all codes using the previous procedure. Codes that re-display are current problems. Fix these first.

3. After repairs, clear codes again.

4. Perform a road test.

5. Re-check for codes.

6. Repair any codes that set.

z To test drive a VW or Audi to verify repairs after DTCs are erased:

1. Warm the engine up to n ormal ope rating tempera ture.

2. Allow the engine to idle (1 or 2 minutes).

3. Road test at part throttle.

Testing T esting Engine Systems

4. Road test at Wide Open Throttle (attain at least 3500 RPM).

5. Decelerate.

6. Perform all steps several times. Remember that all modules should be re-checked for codes after the test drive. Use automatic

test mode to automatically print out all interrogated modules and codes ( “00-Automatic System Test” on page 20).

Important Tips for Codes

• The message on the scan tool states that to clear codes, th e engine mu st be off. Input from

field technicians indicates that this is not always necessary.

• Intermittent codes have the message “Error Occurs Intermittent” after the code description

(VW calls these codes “sporadic”). Codes are considered intermitten t if they occur for a maximum of five seconds. Intermittent codes do not turn the Check Engine Light on. They are automatically erased from memory after 40 drive cycles if they do not occur again. When a malfunction is first detected, it is stored as a static or pe nding malfunction . If the malfu nction no longer exists after a pre-de termined time or distance travelled, then it is labelled intermittent.

• Most 1995 and earlier Bosch control modules may show you a false DTC “00513 - Engine

Speed Sensor (G28)” if the engine is not runn ing. Th is fault co de should disap pear o nce the engine is started. With a defective sensor, the engine would not start. In addition, many automatic transmission control modules may show a DTC that indicates a faulty brake light switch. This usually can be ignored and usually will not appear if you press the brakes once before checking for fault codes.

• Disconnecting the battery may erase fault codes and basic settings on pre-OBD-II vehicles,

which may result in driveability problems. Disconnecting the battery on OBD-II vehicles does not erase stored codes or turn the MIL off. Ho wever, intermittent codes and control unit adaptation learned values may be erased in bo th the e ngine and tra nsmission.

• Disconnecting the battery may require resetting of convenience electronics such as alarm,

interior lights, radio, etc. It is recommended to use a jumper batter y or battery char ger to maintain power when replacing a batter y.

• Readiness Codes need to be reset after codes are cle ared or th e battery has b een

disconnected. Throttle body adaptation relearn is essential and may prevent the engine from starting. See “Testing Electronic Throttle Systems” on page 67 for more information.

• Be aware that clearing codes may not change throttle body ada pt ation status to “not ready”

(060 or 098), but throttle body reset is highly recommended to ensure no problems. See the Volkswagen/Audi OBD-II Readiness Co de Char t s for additional infor mation.

• Sometimes a fault code is displayed for a component which is n ot inst alled in the vehi cle

under test (i.e., a cruise control). This code cannot be cleared. Always make sure th e component the code refers to is present when a code cannot be cle ared.

• Performing activation tests may set false codes. Always ch eck and clear codes af te r

performing activation tests.

• Vehicles with Dr ive-by-Wire (no throttle cable) cannot be power -braked. The Brake On signal

notifies the control module to command the throttle closed and may also set false codes.

• Vehicles with fu ll Drive-by-Wire (n o throttle cable), usually have a EPC ( Electronic Power

Control) indicator light. The EPC light should come on if there is any problem in the Drive-by-Wire system. Faults detected by the EPC set duplicate fault codes in the ECM.

• Electronic Instrument Clusters may store only up to four fault codes. Intermittent fault codes

are automatically erased if they do not reoccur in the next 50 engine starts.

Testing T esting Engine Systems

NOTE:

• Diesel Only: Late model Diesel TDI engines (1996 and newer) may have three different

code-setting MILs. All three of the following lamps set codes in the ECM memory.

– Engine Management Check Engine Lamp – Glow Plug Warning Lamp

This lamp has dual functions: the lamp is on when st arting a cold engine, which normally indicates that glow plugs are on; blinking lamps indicate malfunctions that affect driveability.

– Exhaust Warning Lamp

This lamp is switched on with faults that adversely affect emissions (not all exhaust gas faults turn the lamp on; always check for codes regardless of lamp).

5.2.3 Data

A Data selection is available from the Main Menu of most ve hicles, but only wh en “Engin e Management” is selected from the System Selection menu (see “Selecting a System” on page 15). Viewing data in standard mode with the scan tool doe s not affect vehicle operation.

The Data selection displays the following choices:

• Data Groups displays data in diagnostic groups to make problem solving easier .

• Codes & Data displays all data pa rameters a nd codes together but the scr een data has a

slower refresh rate.

• Return To Main Menu takes you back to the Main Menu.

i Some late model vehicles may communicate with the scan tool with the ignition switched off,

though communication is limited to the ECM, and data values received may be er roneous. Always communicate with the ignition on.

Data Groups

The Data Groups mode first displays a Gro up Selection scre en. The data group items available will vary from one vehicle to another. For some vehicles, the dat a

groups list may be as short as two groups, or it may b e as long a s 25 groups.

i It is possible to read any display group like the factory tool by selecting Readiness Code from the

Functional Tests menu or by selecting Expert Mode > 08-Read Measuring Value Block and entering the display group. Data is displayed in a four-channel format, like the factory tool.

z To display data groups:

1. Select any specific group. A Data Group screen displays. When the scan tool first enters the group, it displays the group title and three lines of data.

Scroll down and the scan tool displays the rest of the group data, until End Of Group displays.

Testing T esting Engine Systems

NOTE:

IMPORTANT:

2. Scroll past the last line and the scan tool attempts to communicate with the next group in the list and displays the Requesting Data Group screen.

3. After communication has been reest ablishe d, the next group for that vehicle displays. In this way it is possible to scroll though all the data groups, scrolling in the opposite direction

moves through the groups in reve rse ord er.

Codes & Data

Selecting Codes & Data displays codes and data together.

i The data in the Codes & Data display are preselected from the individu al display groups. It is

important to note that except for a few early m odels ( with only o ne display gr oup 000) the preselected “codes and data” represen t s a limited list that may not includ e all possible display groups. There may be more display groups available in Expert Mode than in standard mode. Check Expert Mode for any missing display groups.

Reading Codes & Data or individual d isplay group dat a (Measuring Value Blocks 08) can be used for testing as the engine operates normally . The scan to ol does not affect the control module when reading data (08). This is not true for 0 4-Basic Se ttings (see pa ge 22).

5.2.4 Functional Tests

The Functional Tests menu gives you the ability to activate components of the engine management system.

Initiate Actuator T ests

Which actuators can be activated depends on the control mo dule under test and the vehicle itself. Actuators can include the following:

• Fuel pump relay

• EV AP cani ster purg e valve

• Injector valves (odd and even cylinders)

• Oxygen sensor (O2S) heater relay

The Fuel Pump will run continuously while the Actuator tests are in progress.

The scan tool commands the control module to activate a component, but it do es not check whether the component is actually operating correctl y.

In most cases, the effect can be clearly heard: a relay clicks or a pump runs. Be aware, actuators can be mounted anywhere within the vehicle, (i.e., under the dashboard , unde r the hoo d, and even in the trunk). If no reaction can be heard at all, measure the actuator with an oscilloscope or a multimeter. This in dicates whether the contr ol module is co ntrolling the comp onent pr operly.

Testing T esting Engine Systems

When Initiate Actuator T est s is selected, the scan tool sequentially activates each of the actua tors for 30 seconds. For example, running actuator te st s on a 200 2 W8 Passat would activate the following actuators in the following sequence:

1. TAnk Vent Valve

2. Secondary Air Control

3. Secondary Air Pump

4. Bank 1 Camshaft Adjustment

5. Evaporative Emission Control System L.D.P.

6. V alve Engine Mounting

7. Bank 2 Camshaft Adjustment

8. Exhaust Cam Timing V alve B1

9. Exhaust Cam Timing V alve B2

10. Control Vacuum Pump Brake

1 1. Cooling Fan High Speed

12. Cooling Fan Low Speed

13. Cooling Fan Low Speed Deactivated

14. Relay Additional Coolant Pump

15. Injector 1 Activated

16. Injector 1 Deactivated

17. Injector 2 Activated

18. Injector 2 Deactivated

19. Injector 3 Activated

20. Injector 3 Deactivated

21. Injector 4 Activated

22. Injector 4 Deactivated

23. Injector 5 Activated

24. Injector 5 Deactivated

25. Injector 6 Activated

26. Injector 6 Deactivated

27. Injector 7 Activated

28. Injector 7 Deactivated

29. Injector 8 Activated

30. Injector 8 Deactivated

Before the actuator tests can be r e-initiated, the vehicle ignition must be turned off. Then, start the engine, turn the engine off, then turn the ignition switch on again. If the actuator tests are re-initialized without the ignition being cycled, the Actuator Test Not Possible screen displays.

z To run actuator tests:

1. Select Initiate Actuator Test s from the Functional Tests menu. A warning message displays.

2. Select to continue.

Testing T esting Engine Systems

WARNING

The scan tool proceeds directly to the first actuator test available for the current vehicle ID. This test automatically activates all the actuators applicable to the vehicle for approximately 30 seconds each. The current test displays on-screen.

Important Tips for VW/Audi Engine Actuator Tests

•

The Output Test Function is only available when the engine is not running.

• Exiting and reselecting actuator tests will not re-initiate actuator tests on some engines. It is

not recommended to interrupt the test sequence once it h as been st arted. Exitin g while an output is activated causes a “Close Controller” command to be issued. If e xiting and reselecting the actuator test does not work, turn the key off for 10 seconds, then start the engine, then shut the engine off. T urn the ignition on, then reselect Initiate Actuator Tests from the Functional Test menu. Most control modules will permit the Output Test Sequence to be run only one time per session. Therefore, each new session will usually require an ignition reset and engine start. Verify that the component is present on the vehicle you are testing.

• Have the engine running only when instructed to do so by the scan tool and always follow the

instructions displayed on the scan tool.

• With some engines, it is very difficult to hear the injectors click. Use a multimeter, scope, or

stethoscope to make sure the injectors are activated proper ly (if injectors can be reached, it is sometimes possible to feel the injectors working).

• The sequence in which the tests are performed and the availability of the tests are controlled

by the control module under test. Output test s availab le are n ot determin ed by th e scan tool .

• On some engines, before the actuator test can be re-initiated, the engine has to r un at least

30 seconds prior to the test.

• Some automatic transmission systems do not have actuator test s. If Initiate Actua tor Tests is

selected one of these systems, an Actuator Test Not Possible message displays.

• Some outputs require additional action befor e they become active. Fu el injecto rs are a

common example. To activate a fuel injector, you must press ( and in some cases release) the accelerator pedal.

Risk of erratic vehicle response.

• Do not use the Output Tests function on any system while the car is in motion.

Erratic vehicle response can cause serious injury.

Review ECU ID

This menu item displays the identification data o f the control mo dule under test. Th e dat a displayed may be required when ordering repl acement compone nt s for th e vehicle. Supplemental control module information may be available, if so, it can consist of the VIN number, module numbers for additional control units , or other info rmation sen t by th e control module .

The Review ECU ID screen should display when selected, follow screen instructions.

Basic Settings

Basic Settings has different functions depending on the year, make, and model. Generally, it involves invoking a specific control module to run in a special mode of operation that either sets

Testing T esting Engine Systems

NOTE:

the conditions to perform an adjustment or interna lly run a test. When in Basic Settin gs, the user may be required to:

• Command the scan tool by entering the correct numbers and makin g the correc t on-screen

selections.

• Create the correct vehicle conditions for a diagnostic test to run.

• Operate the vehicle for Accelerated Adaptive Learning.

• Perform an adjustment procedure.

i Basic Setting mode is also used to run system or subsystem Readiness Codes, which verify repair

work (see Readiness Code supplement for more information).

You can select BASIC SETTING from three different menu choices on the scan tool:

• Functional T est menu > Basic Settings—This Basic Setting selection will only have one or

two preselected tests with help screens. This selection for Basic Settings is different from the “Expert Mode” Basic Settings. This

selection will list only one or two important procedures with help screens to guide you through the process. Note that in “Expert mode” neither Basic Settings nor any other selection have any help screens available.

• Functional T est menu > Readiness Code > 04-Bas ic Setting—This Readiness Code mini

Expert Mode has some but not all of the functions available under the main Exper t Mode.

• Expert Mode > 01-Engine Management Maste r > 04-Basic Setting—Viewing data in Basic

Settings (04) is very similar to viewing data in display group mo de (08, Measur ing Value Blocks). The display group numbers and the specific data displayed are the same, however, the difference is that in Basic Settings the Control Module performs various calibrations or activates certain tests which should be reflected in th e read ings.

Engine Management Functional Test Menu

The following Basic Settings can be selected if available:

• Throttle Valve Adjuster/Idling Control/Ada ptation EPC-System (Electronic Throttle

Body Adaptation). In this Bas ic Sett ing, the cont rol module relear ns t he th rottle p ositio n using an automatic procedure. See “Testing Electronic Throttle Systems” on page 67.

i If possible, the factory procedure recommends performing this test with the engine cold.

• Kickdown Function. In this Basic Setting, the control module relearns the kickdown position

for the automatic transmission. The procedure must be followed exactly. Hold the throttle for 3 seconds, by pressing down the throttle fully to the floor , then relea se (make sure you feel the kickdown switch engage).

– Always check for kickdown selection in the Engine Functional Test menu, as kickdown

adaptation is not always included in the Readiness Code Charts.

– Kickdown may also be selected in Expert Mode. In engine or transmission, se lect basic

settings 04/000. Remember that in Expert mode there are no help screens. Once in Basic Settings, depress the throttle to the floor for three seconds, the n release. Press N to e xit. New kickdown learn settings should be set (no feedback on-screen).

Testing T esting Engine Systems

IMPORTANT:

NOTE:

On some models, kickdown relearn may not set properly using Basic Settings in the transmission controller . There is no way to ve rify that the kickdown reset test has been completed by looking at the transmission data. A test drive before and after may ve rify that the test was completed. Alternately, select engine management data and select display group

063. If kickdown adaptation status reports an e rr or, go back and select Basic Settings in the Engine Management Functional Tests menu, then select kickdown as stated above.

• Ignition Timing. While in Basic Settings mode the ignition timing is fixed; the control module

will not attempt to compensate for any variation in ignition timing or idle speed. After any adjustments, cancel to return engine control to the control module.

• Start of Delivery (Diesel En gines). In this Basic Se tting, the en gine is se t in a mode so th e

start of delivery can be checked or manually adjusted. Th e actual va lue as we ll as the minimum and maximum values are displayed (values di splayed dep end on te mpera ture).

Basic Setting Screen

With most Basic Settings, data displays with the required instructions. Always end the Basic Setting session by selecting Other Systems to be sure that the settings are

stored. Turn the ignition key off and wait 60 seconds, to ensure that adaptation has occurred .

Y ou sho uld refer to the Service Manual for a specific vehicle and engine before attempting to u se the Basic Settings function. Using an incorrect procedure can have negative consequences.

In Basic Settings, certain functions are disabled or stabilized to avoid learning interference and to allow specific tests to run or adaptive learning to ha ppen. Learning usually start s 20 seconds after the initiation of Basic Settings if the engine is at normal operating temperature. Exactly what Basic Setting controls varies by year, vehicle and engine.

Example 1: 1993–1995 engine code AAA or ABA

1. Stabilizes ignition

2. Stabilizes Idle Speed

3. Disables the A/C

4. Disables the Evaporative Control System

Example 2: All Late Model OBD-II

1. A/C is shut off

2. No idle stabilization

3. Disables the Evaporative Control System

4. Runs Readiness Code Monitors

5. Enables accelerated learning

i In Basic Settings, Evaporative and Leak Detection functions are usually only temporarily disabled

depending on the function.

Testing T esting Engine Systems

NOTE:

Basic Settings and Adaptive Learned Values

Operating parameter values are preprogra mmed into the control module as default va lues. Control module adaptive learning adjusts to these default va lues as changes in engine conditions occur. If the batter y or control module is disconn ected or fault co des are erased, lea rned values are erased and the control module reverts back to the default values. The engine runs, but the default values may not match the current needs of the engine, which can result in poor performance. Also, when repairs are made, the defau lt values ma y not match the cu rrent n eeds of the engine. The control module has to relearn new adaptive valu es over time as the vehicle is driven. To expedite the learning process, the scan tool in Basic Settings can force th e control module to learn current conditions in several minutes comp ared to normally taking several days of extended driving to meet all the different conditions.

Basic Settings and Fuel Trim Accelerated Learning

After repairs, Long Term Fuel Trim adaptation settings need to be relearned or the vehicle ma y not operate properly. Basic Settings can be used to accelerate learning, greatly reducing the normal time under standard operating conditions that it would take for adaptation to readjust itself. Note that Audi repair strategy usually includes basic settings accelerated learning, but VW is limited to specific models and systems. However, because VW and Audi share the same technology, Basic Settings may work similarly on VW . For Fuel Trim accelerated Learning on both VW and Audi, initiate basic settings for accelerated learning in the appro priate fuel trim di splay group (see “Appendix C Fuel Control Learning Adaptation Values” on page 157). After selecting a display group in Basic Settings, check that the scan tool does not report an error, which usually indicates that Basic Settings is not available for that display group. If no error is reported and the engine is fully warmed up, perform a short road test and moni tor if the rea dings ch ange. If an er ror is reported, then Basic Settings cannot be used for accelerated learning and a longer road test will be necessary for proper fuel control learning to occur.

Example: Using basic settings for accelerated learning to assist in diagnosis.

After replacement of a faulty Mass Air Flow (MAF) sensor on a late model Audi, a technician wants to validate the repair and reset the Long-term fuel trim values. Being careful not to clear codes before road testing because this resets the learned values to 0, the technician recor ds the fuel trim adaptation values (idle and p art throttle adaptation) for after rep air comparison. With the engine is at operating temperature, Basic Setting in display group 032 is selected, and idle for 3–5 minutes. Then a short road test (1–2 miles) is performed, which includ es a few stop- an d-go p art thro ttle accelerations. The new MAF should substantially change the fuel trim adaptation values. If values are normal, clear codes and then set all the readiness codes to the OK status. If they all set OK, the technician is very confident that there are no other pro blems. A final road test is always a good idea, checking for any possible intermittent problems.

i Out-of-range adaptation readings resulting from a faulty component like a MAF sensor usually will

not set a code or turn the MIL on until values ar e excessive (±14). Normal adaptation readings with a good MAF sensor should not exceed ±5% Clearing codes or initializing Basic Settings reset s the adaptation values back to base or zero. Recording the previou s reset readings for comparison is helpful to verify that the repair has correcte d the pr oblem.

Testing T esting Engine Systems

NOTE:

Basic Settings and Readiness Codes on OBD-II Vehicles

Basic Settings is also used on OBD-II vehicles to set Readiness Codes. These are OBD-II Readiness monitor tests that are commanded b y the scan tool using Ba sic Settings.

All Readiness Code tests are run using Basic Settings. OBD-II Readiness Code tests automate many of the previous OBD-I and some early Audi OBD-II adaptation learn procedu res that previously required driving the vehicle. Now many of these relearn procedures can be accomplished in the shop without a complex test drive.

On OBD-II vehicles with electronic throttle bodies, the most common use for the Basic Settings function is to recalibrate the throttle position sensors. This is accomplished using Group 098 (electronic throttle with a cable) or 060 (electronic throttle without a cable—full, Drive-by-Wire).

Basic Settings learning is prohibited when:

• Malfunction codes are stored.

• Engine idle is uneven (surging).

• Engine coolant temperature is below 176° F (80° C) or above 23 0°F (110°C).

• Fuel Mixture is too rich or lean (an excessive difference betwee n the richest and lea nest

oxygen sensor learning values).

• During acceleration and at Wide Open Throttle. Learning takes place only at idle (650–900

RPM) and at 1500–3000 RPM. Road test the vehicle at steady cruise to set the pa rt throttle fuel trim adaptation.

i During the diagnosis, if a vehicle has a possible fuel control related problem, it is recom mended

to record both the idle and part throttle adapt ation values (usually display g roup 032) before clearing codes or performing basic settings. Out of specification adapt ation readings may n ot always set a code. Clearing codes resets the adaptation values and basic settings initiates accelerated learning. Using the previous readings for comp arison is helpful to verify that the rep air has corrected the problem.

i Always end the Basic Settings session by selecting Other Systems in standard mode or 06-Stop

Communication in Expert Mode to be sure that the settings are stored. T urn the ignition key off and wait 60 seconds.

Other Basic Setting System Functions

Crankshaft Sensor Wheel Learn ing. Correction for flywheel gear teeth inconsistency for misfire detection. When the scan tool is connected to the vehicle during a roa d test in Basic Settings with the appropriate display group for a specific vehicle, the CKP Se nsor whee l is tested dur ing a deceleration fuel shutoff at 2200–4000 RPM. After the learning ha s occurred, Channel 4 changes to “OK” or learned status “YES”.

Basic Ignition Timing Check. Availabl e on most late 1 980s to mid- 1990s veh icles with adjustable ignition timing. In 04-Basic Setting, the DIS (digital Idle stabilization) is shut down. Base ignition timing can now be checked. On some early vehicles, Basic Se tting may also force an open loop operation to allow for mixture adjustment.

Testing T esting Engine Systems

NOTE:

Xenon Lights base setting level control a djustment . Basic setting is required for Automatic

vertical headlight aim control which keeps the tilt angl e of the low beam const ant regar dless of acceleration or load shift.

Problems with Basic Settings

If the adaptation status displays Err or, or other problems occur, read the trouble codes fo r more information. Check the required conditions and try the basic setting again.

Service Interval Reset

This section includes different service reset procedures for various typ es of electronic instrument clusters. However, most of these will apply to Audi only and also depend on whether a high or low end cluster is installed (optional equipment on some models).

i Use Expert Mode for communication problems with the Electronic Instrument service interval

reset or if Service Interval Reset is not on the menu. Select 17-Electronic Instrumen t Panel > 10-Adaptation, then select channel 5 (005), scroll in the 8 for 8,000 kilometers (5,000 miles). Channel 6 is the distance value (24 = 24,000 kilometers or 15,000 miles). Channel 7 is the time value until the next Inspection 1 (36 = 360 days). Channel 8 is the time to Inspection 2 (72 = 720 days). See “Chapter 4 Expert Mode” on page 18 for more information.

Vehicles with Manual Mechanical SRI Reset (1995–2000)

Most VWs have mechanical SRI reset; Audi may have electronic SRI reset depending on model and instrument cluster.

z To mechanically reset the oil light:

1. Switch the ignition on.

2. Press and hold the odometer reset button loca ted be low the speedome ter.

3. Switch the ignition off and release the odometer reset button. OEL (Oil Engine Lamp) appears in the SRI display.

4. Press and hold the lower digital clock re set button or the an alog clock reset bu tton until 5 dashes (-----) appear in the display.

OEL SRI is now reset to 7500 miles or 6 months.

i Once the OEL is reset, the other displays can be reset without switching the ignition on.

z To reset the service light:

1. Press the odometer reset button to perform the inspection 01. IN 01 should be displayed in the SRI display .

2. Reset by pressing the clock button.

3. If necessary, repeat the procedure for Inspection 02.

4. Turn ignition on.

Testing T esting Engine Systems

When IN 01 appears in the SRI display, switch the ignition off, procedure is completed.

Vehicles with Electronic Service Interval Reset

On VW/Audi vehicles with electronic dashboards, the following functions may be available from the Functional T est s menu:

• Reset Service Interval

• Reset Service Interval Oil(Km)

• Reset Service Interval Insp1(Km)

• Reset Service Interval Insp1(Days)

• Reset Service Interval Insp2(Days)

• Reset Days And Km After Service

• Pre-set V alue Oil(Km)

• Pre-set V alue Oil(Days)

• Pre-set Value Insp1(Km)

• Pre-set Va lue Insp1(Days)

• Pre-set Value Insp2(Km)

• Pre-set V alue Min Oil(Km)

• Pre-set V alue Max Oil(Km)

• Pre-set V alue Oil Quality(Km)

• Read, Set Km Remaining To Oil Service

• Read, Set Days Remaining To Oil Service

• Read, Set Km Remaining To Insp1

• Read, Set Days Remaining To Insp1

• Read, Reset Km After Oil Service

• Read, Reset Days After Oil Serv .

• Read, Reset Days After Insp1

• Read, Reset Km After Insp2

Note the following when performing an electronic service int erval reset .

• Depending on the type of Electronic Instrume nt Panel, there are 4 to 9 functions available for

Service Resetting.

• The service intervals are measured/set/reset in kilometers even when the speedometer

shows miles. The scan tool will calculate the equivalence in miles wh en showing kilometer s.

• Remember that the service intervals can be changed in step s of 100 or 1000 kilometers on ly.

It is not always possible to set them to a round number of miles. The only exceptions are some new instrument panels, Type H and J, which use miles as base value.

• Depending on the type of Instrument Panel, up to thre e different types of service inter vals are

available:

– Oil Service— Oil Change – Inspection 1— Yearly Inspection – Inspection 2— Bi-yearly Inspection

• Depending on the type of Instrument Panel, the limit values for the above type of inspections

are in kilometers and/or days.

Testing T esting Engine Systems

z To perform an electronic service interval reset:

1. Select 17-Electronic Instrument Panel from the System Selection menu.

2. From the Main Menu, select Functional Tests. The Functional Tests menu displays.

3. Select Reset Service Interval. The scan tool displays a warning message.

4. Select to continue. The Reset Service Interval screen displays. The number displayed is the recommended value by the facto ry. This value can be changed

by scrolling.

5. Select the correct amount. The new value is entered into the control module and the sca n tool returns to the Fun ctional

Tests menu.

Pre-set Functions

The Pre-Set functions are used to specify the total length in kilometers and o r days between the service intervals. These functions only specify the time or dist ance between inter vals, they do not reset the interval.

z To use pre-set functions:

1. Select the desired function from the Functional Tests menu. The scan tool displays a warning message.

2. Select to continue. The number displayed is the current value.

3. If the value is not to be changed, return to the Functional Tests menu. If the value requires changing, select continue to open the Change Confirmation screen.

4. Select continue. The Change Preset Value screen displays. The number displayed is the current value. When it has never been changed , it is the factory

setting. This value can be changed by scrolling.

5. Select the correct amount. The new value is entered into the control module and the sca n tool returns to the Fun ctional

Tests menu.

Read, Set/Reset Functions

The Read, Set and Read, Reset functions can be used to read the kilome ters or da ys since the last service set them to the required value. These functions are only needed when an insp ection has been carried out prematurely (before the service interval is required). These functions work the same as the Pre-Set functions. See “Pre-set Functions” on page 52.

Testing T e sting Transmission Systems

5.3 Testing Transmission Systems

The V AG so f tware cartrid ge covers the following tr ansmissions:

• AG4 Getriebe 001

• AG4 Getriebe 018

• AG4 Getriebe 01F

• AG4 Getriebe 01K

• AG4 Getriebe 01M

• AG4 Getriebe 01N

• AG4 Getriebe 01P

• AG4 Getriebe 096

• AG4 Getriebe 097

• AG4 Getriebe 098

• AG5 Getriebe 01L

• AG5 Getriebe 01V

• AG5 Getriebe 09A

• AG5 Getriebe 09B

• Digimat 0842

• Direkt-Schaltgetriebe DS085

• Multitronic V30 01J

VW automatic transmission controllers started using digital dia gnostics in 1989 on the Passat with the 095 transmission (4-speed) and continued with 096/01M and 098/01P. 5-speeds include the 01V and 09A. All VW transmissions use digital controllers with codes.

Audi started with the 097 transmi ssion (4-speed) in 1990 on 80/90/100 models and continu ed with 01F, 01K, 01N 5-speeds, which includes the 01L and 01V transmissions. The newest transmission called the Constant Velocity Transmission (CVT) is designated the 01J.

The VW/Audi vehicle communication software st a rt s VIN ID in 1991 (US vehicle system s). On early 1990–1992 vehicles, using VIN ID regular mode the scan tool may display codes only.

Using regular mode, transmission data may not be available until 1993, but you can use Expert Mode to read transmission data on pre-1993 vehicles. See Table 5-8 for coverage.

Table 5-7 lists Volkswagen/Audi transmissions from 1988 to 2003 and their features, and Table 5-8 on page 57 lists Volkswagen/Audi transm issions with the mode ls where they are foun d.

Table 5-7

Transmission Transmission Features Notes

018 (ZF4HP24)

01F (ZF4HP18)

01J

Transmission types and system descriptions (part 1 of 4)

• 4-speed longitudinal AWD

• TCC On/Off Solenoid

• 4-speed longitudinal AWD

• TCC variable lockup

• TCM: 54-pin, 55-pin, or 88-pin connector

• 5 shift programs

• 2 emergency running modes

• CVT longitudinal FWD

• TCM inside transmission rear cover

Testing T e sting Transmission Systems

Table 5-7 Transmission types and system descriptions (part 2 of 4)

Transmission Transmission Features Notes

• 4-speed longitudinal FWD

01K (ZF4HP18)

01L (ZF5HP24)

01M

01N

01P

• TCC variable lockup

• TCM: 54-pin, 55-pin, or 88-pin connector

• 5-speed longitudinal AWD

• TCC variable lockup

• Lifetime oil

• TCM: 88-pin connector

• 4-speed transverse FWD

• Fuzzy logic, 253 constantly adapting shift strategies

• Cold start & limp home programs

• TCM: 68-pin connector

• Converter clutch in torque converter and uses PWM solenoid for variable lockup

• Sun shell speed sensor (trans VSS) added for shift timing

• Trans ID stamped in case at top of starter boss

• Dipstick replaced with fluid level plug

• 4-speed longitudinal FWD

• Used mid-1995 to present

• Lifetime oil

• TCM: 68-pin connector

• Dynamic shift program

• Convertor clutch in torque converter and Uses PWM solenoid for variable lockup

• Sun shell speed sensor added for shift timing

• Dipstick replaced with fluid level plug

• 4-speed transverse FWD

• Fuzzy logic, 253 constantly adapting shift strategies

• Cold start & limp home programs

• TCM: 68-pin connector

•TCC-PWM

• Sun shell speed sensor

• Used mid-year 1995 to present

• 098 renamed 01P.

• Converter clutch in torque converter and uses PWM solenoid

• Sun shell speed sensor added for shift timing

• Dipstick replaced with fluid level plug

Tiptronic appeared on some models in 1998. E17 was the earliest control system. E18/2 started late 1998 on some models. CAN bus appear in some models in 1998.

096 was renamed 01M and used from mid-1995 to present; year model 1995 may have 096 Phase 1 or 01M Phase 2 trans.

097 was renamed 01N in mid-1995; year model 1995 may have 097 Phase 1 or 01N Phase 2 trans.

Model year 1995 may have either 098 Phase 1 or 01P Phase 2 trans.

Testing T e sting Transmission Systems

Table 5-7 Transmission types and system descriptions (part 3 of 4)

Transmission Transmission Features Notes

(Used for VW and Audi) FL = FWD, FLA = AWD VW/Audi: Tiptronic appeared on some models in 1998. E17 was the earliest control system. E18/2 control system started late 1998 on some models. CAN bus appear in some models in 1998.

VW Only: Replaces 01M transmission starting 1998 Passat model year.

VW introduced the transverse 4-speed, electronically-controlled 095 automatic transmission in model year 1989. It was soon replaced by the 096 transmission in mid-1990.

096 replaced the 095 transmission in mid-1990; year model 1993 may have 096 Phase 0 or Phase 1 trans; 1995 may have 096 phase 1 or 01M phase 2.

01V (ZF5HP19)

095

096

• 5-speed longitudinal

•FWD or AWD

• TCC variable lockup

• Lifetime oil

• TCM: 88-pin connector

• 4-speed transverse FWD

• Economy/Sport switch on console near shift lever.

• K3 clutch locks gear train one to one with torque converter for lockup with On/Off solenoid.

• Trans ID stamped at top of bell housing on some.

• External transmission oil filter (If not updated “removed” with bulletin #37-91-03).

• 4-speed transverse FWD

Phase 0

• Used to mid-1993

• TCM: 38-pin connector

• Economy/Sport switch on console near shift lever

• K3 clutch locks gear train one to one with torque converter for lockup with On/Off solenoid

• Trans ID stamped at top of bell housing

Phase 1

• Used mid-year 1993 to mid year 1995

• Fuzzy logic, 253 constantly adapting shift strategies

• Cold start & limp home programs

• TCM: 38-pin or 68-pin connector

• K3 clutch locks gear train one to one with torque converter for lockup with On/Off solenoid

• Economy/Sport switch deleted

• Sport shift map in TCM

Testing T e sting Transmission Systems

Table 5-7 Transmission types and system descriptions (part 4 of 4)

Transmission Transmission Features Notes

• 4-speed longitudinal FWD

Phase 0:

• TCM: 38-pin connector

• Used to mid-1993

• Economy/Sport switch on console near shift lever

097

098

09A

09G

• K3 clutch locks gear train one to one with torque converter hub for lockup with On/Off solenoid

Phase 1:

• TCM: 38-pin connector

• Used mid-1993 to mid-1995

• K3 clutch locks gear train one to one with torque converter for lockup. Uses On/Off solenoid

• Economy/Sport switch deleted

• Sport shift map in TCM

• 4-speed transverse FWD

• Fuzzy logic, 253 constantly adapting shift strategies

• Cold start & limp home programs

• TCC On/Off

Phase 0:

• TCM has 38-pin connector

• Used to mid-1993

• Economy/Sport switch on console near shift lever

• K3 clutch locks gear train one to one with torque converter hub for lockup with On/Off solenoid

Phase 1:

• TCM: 38-pin or 68-pin connector

• Used mid-1993 to mid-1995

• K3 clutch locks gear train one to one with torque converter for lockup and Uses On/Off solenoid

• Economy/Sport switch deleted

• Sport shift map in TCM

• 5-speed transverse FWD

• Lifetime oil

• TCM: 68-pin connector

• 6-speed automatic transmission

• 6 hydraulically activated forward gears

• 2nd, 3rd, 4th, and 6th gears mechanically driven with TCC locked.

• ATF oil is filled for life and is not changed.

• Uses fuzzy logic adaptation to driving with infinitely variable gear switch points.

Model year 1993 may have either 097 Phase 0 or Phase 1 trans.; 1995 may have either 097 or 01N.

Introduced when Eurovan replaced Vanagon in 1992; year model 1993 may have 098 Phase 0 or Phase 1 trans.; 1995 also has 01P.

2002 Golf/Jetta has either 01M or 09A

Testing T e sting Transmission Systems

Table 5-8 Transmission applications (part 1 of 2)

Transmission Model Engine Year

018 (ZF4HP24) V8

01F (ZF4HP18)

01J

01K (ZF4HP18)

01L (ZF5HP24)

01M

01N

01P Eurovan

01V (ZF5HP19)

095

A6 2.8L 1995–98

100 2.8L 1992–94

A6 3.0L A6 2.8L 1994–98

100 2.8L 1992–94

A6 4.2L 1999–2005 A8 4.2L 1997–2005

Phaeton

VW Cabrio 2.0L 1995–2002

Golf/Jetta/GTI

New Beetle

Passat

Audi Cabriolet 2.8L 1995–98

90 2.8L 1995

Golf/GTI/Jetta 1.8L, 2.8L 2001–03

Passat FWD

Passat AWD

Corrado/

Passat

3.6L 1990–92

4.2L 1993–94

1.8L, 1.9L,

2.0L, 2.4L,

2.5L, 3.0L

4.2L 2004–05

6.0L 2004–05

L4 1.8L 1995–2005

1.9L TD 1995–2005

2.0L, V6 2.8L 1995–2005

1.8L, 1.9L,

2.0L

1.8L, 1.9L,

2.0L, V6 2.8L

2.4L, L5 2.5L,

2.8L

1.8L 1997–2003

2.8L 1996–2001

3.0L 2002

2.7L 2000–03

2.8L 1998–2003

1.8L, 2.8L,

4.0L

2.8L

4.0L

2003–05 Multitronic

1998–2005

1995–97

1995–2005

1998–2005 E17, E18/2

1989–90 Phase 0

Control System

Version

E17–E18/2

All 01M trans. are

Phase 2

All 01N trans. are

Phase 2

All 01P trans. are

Phase 2

E17–E18/22.7L 1998–2003

E18/2

E17–E18/2A8 3.7L 1997–99

Testing T e sting Transmission Systems

Table 5-8 Transmission applications (part 2 of 2)

Transmission Model Engine Year

1.8L 1989–92

Corrado

Golf/Jetta

096

Passat

VW Cabrio 2.0L early 1995

Audi Cabriolet 2.8L 1994–95 Phase 1

80 2.3L

097

098 Eurovan

09A

09G

100 1990–92 Phase 0

Golf/Jetta

Golf GTI

Jetta

Jetta Wago n

R32

VW New

Beetle/Audi TT

Passat, Jetta

2.8L

1.8L

2.0L

2.8L

2.0L

V6 2.8L

2.3L

2.8L

L5 2.5L

2.4L 1993–95

1.8L 132 KW,

2.8L 147 KW,

2.8L 150 KW

1.8L, 2.0L,

1.9TDI, 2.8L,

3.2 VR6

1.8/2.0L,

1.9 TDI, 2.5L,

3.6L

1992–93 1993–95 Phase 1

1993 Phase 0

1993–95 Phase 1

1993 Phase 0

1993–95 Phase 1

1993 Phase 0 1993–95 Phase 1 1990–93 Phase 0 1993–95 Phase 1

1993 Phase 0 1993–95

1990–92

1992–mid-93 mid-1993–95 Phase 1

1992–93 Phase 0 1993–95

2002

1999–05

1998 (Beetle)

2005 (TT)

Control System

Version

Phase 0

Phase 1

Phase 0

Phase 1

6-speed

5.3.1 Digimat Control Module Identification—Golf & Jetta, 1993–97

Use T able 5-9 and Table 5-10 to identify which TCMs are available for various 50 state ECM/TCM combinations. Do not update a vehicle unless a sp ecific condition has be en identifie d.

Testing T e sting Transmission Systems

When replacing a TCM for any reason, the TCM must be paired with the ECM according to the chart. VIN numbers are for general reference only. Most VINs shown are approximate.

When multiple TCM part numbers are listed for a particular ECM/TCM combination, they are shown in order of development, the earliest TCM at the top. Part numbers are for reference only. Always check a Volkswagen parts department for the latest information.

Table 5-9

Model

Year

1995

1996 021906259A From: 1H_T_000001

1997

* German-built vehicles

Engine code AAA

ECU

Part Number

021906258BM 021906258EA 021906258CR

California

021906259K

021906259AA

Vin

From: 1H_S_012883

To: 1H_S_012952*

From: 1H_S_012883

To: 1H_S_072798

From: 1H_S_072799

To: 1H_S_999000

From: 1H_V_000001

To: 1H_V_073027

From: 1H_V_073028

To: 1H_V_999000

Table 5-10 Engine code ABA (part 1 of 2)

Model

Year

1993

1994

1995

ECU

Part Number

037906258T 037906258AA 037906258AH 037906258AE

Vin

From: 1H_P_012601

To: 1H_P_999000

From: 1H_R_000001

To: 1H_R_999000

From: 1H_S_000001

To: 1H_S_012952

From: 1H_S_012953

To: 1H_S_066798

From: 1H_S_066799

To: 1H_S_999000

TCM Part

Number

096927731CE 1.0

096927733AC 096927733BA

01M927733F 2.0

01M927733FJ 2.1 01M927733AC 2.0 01M927733CB 2.1

01M927733CB

01M927733DM

TCM Part

Number

096927731BH 1.0 CFH Phase 1

096927731BH 1.0

096927733AB

096927733AT

01M927733BA

01M927733CD

01M927733EB 2.1

Digimat

2.0

2.1

Digimat

2.0

Trans Code

& Phase

CFF Phase

CLB Phase 27DK

DMA Phase

Trans Code &

Phase

CFH Phase 1

CNK Phase 1

CLK Phase 2 CLA Phase 2

Valve Body Code

QBA

QCA

QEA

Valve Body Code

QBA

7DK

QCA

Testing T e sting Transmission Systems

Table 5-10 Engine code ABA (part 2 of 2)

Model

Year

1996

1997

ECU

Part Number

037906259

037906259X

037906259JX

037906259D

Tier 1 (w/LDP)*

037906259E

TLEV (w/air

pumps & LDP)*

037906259D

Tier 1 (w/LDP)*

037906259E

TLEV (w/air

pumps & LDP)*

037906259M

Tier 1 (w/LDP)*

037906259N

TLEV (w/air

pumps & LDP)*

Vin

From: 1H_T_000001

To: See footnote

From: 1H_T_118928

To: 1H_T_999000

From: 1H_T_117284

To: 1H_T_999000

From: 1H_V_000001

To: See footnote

From: 1H_V_070133

To: 1H_V_999000

From: 1H_V_074116

To: 1H_V_999000

TCM Part

Number

01M927733M 2.0

01M927733DN

01M927733EA

01M927733CA

01M927733DL

Digimat

2.1

Trans Code &

Phase

CLK Phase 2 7DK

DLZ Phase 2

“ETA”

Valve Body Code

QEA

5.3.2 4-Speed Automatic Transmission—01N

The 01N transmission is an electronically-contro lled transmission with adaptive control. Shif t points are automatically regulated to provide three distinct operating characteristics:

• Comfort driving, maximum fuel economy (shift point s are kep t low)

• Average driving (shif t points are slightly raised)

• High-performance driving (shift points increase to allow higher engine speed between gears)

The transmission control module can tune the shift program incrementally between these modes with up to 244 variations. This is referred to as the DSP (Dynamic Shift Pr ogra m). Each of these 244 variations can be seen using the scan tool. Tapping the accelerator twice will raise the program one level, which means that the transmission shift points will occur at a higher engine RPM. These increments are indicated on the scan tool by numbers 0– 244, with 0 representing the lowest RPM shift points and 244 indi cating the hig hest.

5.3.3 VW Series—095, 096, 01M

These TCMs have gear changes based on driving situatio n (Fuzzy Logic) . Depending on th e driving situation and driving force resistance, gear change points are determined automatically.

These transmissions have the following advantages:

• Gear changes are fuel consumption orientated.

• Maximum engine output is always available.

Testing T e sting Transmission Systems

NOTE:

• Individual adaptation of gear change p oint s in all driving situatio ns.

• Gear change points are infinitely variable.

A gear change map automatically select s gear chan ges for gradients depending on accelerator pedal position and driving speed, which has the following advant ages:

• Gear change map for extreme uphill stretches is matched to engine output.

• Gear change map for extreme downhill stretches is matched to the engine braking effect.

5.3.4 Audi T ransmission—01F, 01K

i Audi transmission Fuzzy Logic Shift Adaptation features are usua lly more complicated tha n

Volkswagen tr ansmissions.

The Dynamic Selection Program (DSP) represents a new form of intelligent switching logic. DSP eliminates the program switch. It can choose automatically between five different selection programs and makes for optimum adaptation of the g ear selection char acteristic to vehicle handling and usage conditions. The signals for Throttle-valve Opening, Engi ne Speed, Road Speed and Vehicle Longitudinal Acceleration/deceleration are used by the TCM to determine a characteristic response number which forms the basis for selection of one of the five progr ams. Control of the shift points can be a long-term or a shor t-term function.

DSP offers the following advantages:

• Better adaptation of shift points to dr iving habits and traffic situations (five instead of two

selection programs).

• No driver-selected program switch.

• Better handling in extreme situations, for example when towing a trailer or on a steep hill.

• Greater fuel economy than previous “Economy” driving program in urban traffic.

• Further improved power potential in selection program 5 as o pposed to the pr evious “spor t”

driving program.

Long-term functions include the following:

• A normal driving style results in a low characteristic response number which result s in a more

fuel-economic selection program where the gears ar e shif te d in avera ge time.

• A sporty driving style results in a high characteristic response nu mber and a selection

program where switching up a gear is delayed and switching down a ge ar is d one sooner.

Short-term functions include the following:

• Instant selection program at a road speed in exce ss of 34MPH (55 KPH).

• With rapid acceleration, a shift-down to the lowest possible gea r without fully d epressing th e

kickdown switch.

• Returns to the original selection program following initiatio n of an upwa rd gea rshif t o r af te r

dropping below a fixed throttle-valve value.

Testing T e sting Transmission Systems

5.3.5 Important Tips for Transmission Codes

• For both VW and Audi, on 1996 and newer models, when emission or limp-hom e relate d

transmission faults are stored, all the d ash transmission gear selector indicator light s may turn on and stay on until fault is cleared. For some pre-OBD-II models, the PRND321 lig ht may turn on or flash. Some may reverse video foreground/backgr ound (black background/white letters) when transmission codes are stored.

• For both VW and Audi, transmission limp-home mode default s to a fi xed ge ar (2nd o r 3rd

gear). Certain stored codes initiate limp-ho me mode . The transmission stays in limp-home until the fault or faults are repaired.

• Multifunction switch-related faults usually turn the transmission MIL on. Other faults are less

predictable.

• Transmission codes af fe cting emi ssions may no t turn on the transmission MIL.

• For some sensor-related faults, the tran smission contr ol unit may substitu te a fixed valu e.

• Not all faults initiate limp-home mode. There are dif f erent d egrees o f limp-hom e mode

depending on the problem.

• After repairs, solenoid-related faults usually clear failsafe mode. Other faults usually require a

clear codes function before the failsafe clears. In addition, the transmission may not shif t correctly until codes are cleared. Always clear codes after repa irs which reset any modified shift operation or failsafe mode.

• On 1996 or newer models, disconnecting the vehicle battery will not turn out the engine or the

transmission MIL.

• Intermittent faults have “Error Occurs Intermittent” after the code description. Intermittent

codes are faults usually not reoccurring within a minimum of 3 miles or 6 minutes and a maximum of 12 miles or 24 minutes. When a malfunction is first detected, it is stored as a static or pending malfunction. If the malfunction no longer exist s af te r the above listed pre-determined time or distance travele d, then it is labeled intermittent. Intermittent faults usually auto erase after 625 miles or 20 h ours of opera tion.

• Codes may set if the vehicle battery is disconnected or if the transmission is removed fr om

vehicle for service.

• Most 1995 and earlier Bosch control modules may display a false DTC, such as

“00513-Engine S peed Sensor (G2 8)” or “0 0526-Bra ke Light Implausib le Signal” if th e engine is not running. These fault codes should disappear once the engine is started. With a defective sensor, the engine wo uld not st art.

• If DTC memory cannot be cleared, check that the ignition switch position was not altere d

during DTC retrieval. The ignition switch must remain on during DTC retrieval and the clearing procedure.

• DTCs need to have the test followed exactly. First, check DTC memory and repair

malfunctions. Next, erase DTC memory.

• On early transmissions (1989–1992), use Expert Mode for dat a parameters. With some 198 9

models with the scan tool hooked up, the vehi cle may only accelera te to 19 00 RPM. This is normal vehicle software operation. Use Expert mode to obtain the data group binary readings and get help with interpretation in “Transmission Expert Mode Parameters” on page 148.

Testing T e sting Transmission Systems

NOTE:

5.3.6 T ransmission Basic Settings

This selection for Basic Settings is different from the “Expert Mode” Basic Settings. This selection will only list up to two adaptation tests with help. See “Basic Settings” on page 45 for a complete description of Basic Settings.

The following selections are available from the Basic Setting menu. The first selection, Throttle Body Adaptation, must be done in Engine testing (see “Engine Managemen t Function al Test Menu” on page 46). Kickdown Function may be done in Transmission testing.

Restore a system to Basic Setting (adaptation) af ter p erforming the following rep a irs:

• Engine exchange

• Throttle position adjustment

• Throttle valve conversion

• Replacement of throttle position sensor

• Replacement of transmission control module

• Transaxle shifting co ncern

i Check for any codes present and clear before starting this procedure.

• Throttle Body Adaptation. In this Basic Setting, the control module le arns the thr ottle

position with an automatic procedure. The electronic th rottle body n eeds to be r eadapte d every time codes are cleared or control module power is disconnected.

• Throttle Body and Transm ission kickdo wn adaptations (also included as part of Readiness

Codes) must be set to avoid driveability problems. The other OBD-II Readiness Codes will set on their own eventually and not produce driveability problems. Clearing codes may not necessarily change throttle body adaptation status to NOT OK, however, driveability problems may occur after an extended road test.

• Kickdown Function. In this Basic Setting, the control module relearns the kickdown position

for the automatic transmission. In addition, shift learned values are reset to base settings. Resetting can be very useful for various driving styles causing learn ed erratic shifting. The procedure must be followed exactly. Hold the throttle for 3 seconds, by pressing down the throttle fully to the floor, then release (make sure you feel the kickdown switch eng age).

– Always check for kickdown selection in the Engine Functional Test menu, as kickdown

adaptation is not always included in the Readiness Code Charts.

– Kickdown may also be selected in Expert Mode. In engine or transmission, select Basic

Setting 04/000. Remember that in Expert mode there are no screen prompts. Once in Basic Settings, depress the throttle to floor for three seconds, then release. Press N to exit. New kickdown learn settings should be set (no feedback on-screen).

– On some models, kickdown relearn may not set properly using Basic Settings in the

transmission controller. There is no way to verify that the kickdown reset test has been completed by looking at the transmission data. A test drive before and after may verify that the test was completed or select engine man agement data and select display group 06 3. If kickdown adaptation status reports an error, go back and select Basic Settings in the Engine Management Functional Tests menu, then select kickdown as stated above.

Testing T e sting Transmission Systems

NOTE:

i VW added a resistor to the brake pedal circuit that activates the kickdown relearn procedure when

the brake pedal has been depressed. This reset s transmission adaptation on so me models during brake apply.

Important Tips for Transmission Basic Settings

• Basic Settings 04/000 also resets transmission learned shifting adapt ation to 0 or base point.

Some early transmissions have no Basic Setting selection. To reset adaptation on these, switch the ignition on without starting the engine and press the accelerator all the way to the floor, turn ign ition of f, let up on accelerator, restart engine. Drive the car and monitor shifting. It should shift at default with no learning. Early transmissions may requ ire an e xtende d road test to learn new shift adaptation.

5.3.7 Functional Tests—VW Passat 01V

A differentiation is made between two types 01V transmissions:

• Type I has the transmission input speed sensor (inductive sensor) secured to the underside

of the valve body (E17).

• Type II has the input speed sensor secured behind the valve body at the transmission hou sing

(E 18-2).

Both types have the following output diagnostic tests available in Functional Tests:

• The output diagnostic test mode is a part of a system electric test. The output dia gnostic test

mode checks the solenoid valves, the shift lock solenoid, the kickdown switch, and the relay for the solenoid valves.

• The output diagnostic test mode can only be perform ed when the selector lever is position “P”,

the engine is not running and the vehicle is stationary.

• The output diagnostic will be terminated if the engine is started.

• The function of the solenoid valves 1-N88-, 2-N89-, 3-N90- and the solenoids for the selector

lever lock are checked acoustically during the output diagnostic test mo de. Avoid noise in the surrounding area during the acoustic check because the switching noise (clicking) of the final controls is very quiet.

• The solenoid valves 4 –N91-, 5-N92-, 6-N93- and 7 –N94- ar e activated dur ing the ou tput

diagnostic test mode. A direct functional check of these valves is not possible . But a possible electrical fault, which occurs during the activation, will be recognized by the on-board diagnostic (OBD) and stored in the DTC memory.

• Only one complete output diagnostic test mode is possible after switching th e ignition on. To

repeat the output diagnostic test mode, the ignition must be switched off and o n again (sometimes this may require engine to be started).

Testing T e sting Transmission Systems

NOTE:

Type I Transmission (E17) Solenoid Activation

Activation sequence:

1. Solenoid valve 1 –N88-

2. Solenoid valve 2 –N89-

3. Solenoid valve 3 –N90

4. Shift lock solenoid –N110-

5. Solenoid valve 4 –N91-

6. Solenoid valve 5 –N92-

7. Solenoid valve 6 –N93-

8. Solenoid valve 7 –N94-

9. Kickdown switch –F8- (Kickdown for air conditioner)

10. Solenoid valves relay

i If the kickdown switch is operated, the transmission control module briefly switches off th e air

conditioner compressor.

Type II Transmission (E18/2) Solenoid Activation

Activation sequence:

1. Solenoid valve 1 –N88-

2. Solenoid valve 2 –N89-

3. Solenoid valve 3 –N90

4. Shift lock solenoid –N110-

5. Pressure control valve 1 –N215-

6. Pressure control valve 2 –N216-

7. Pressure control valve 3 –N217-

8. Pressure control valve 4 –N218-

9. Vo lt age su pply for Sole noid valves

i Pressure-regulating valve –5- for automatic transmission –N233- co uld be d isplayed

erroneously—valve –5- does not exist on the –N233-.

Fail-safe Functions of the TCM

If individual or several components or sensors fail, the transmission control module (TCM) activates corresponding substitute functions or backup programs to ensure the automatic transmission operates, allowing a vehicle to be driven to a safe location. The respective ef fe ct is noticeable on the operation and quality of the gear shif t s.

Testing T e sting Transmission Systems

If critical malfunctions occur and the TCM is active, the gear eng aged a t that moment is maintained initially . The TCM activates the “Fail-safe mode with active co ntrol module” as soon as the driving situation permits it while ensuring transmission security and road safety.

Fail-safe Mode with Active Control Module

•

Transmission shif ts out of all forward gears into hydraulic 4th gea r . Torque converter clutch is open. All solenoid valves are de-energized.

• Maximum shift pressure applied to the power-transmitting elem ent s.

• Reverse gear can be engaged. Selector lever lock is ina ctive (In “P” and “N”)

• All the segments of the gear display light up completely.

If the TCM fails, the transmission immediately continues to operate in “Fail-safe m ode with non-active control module”.

Fail-safe Mode with Non-active Control Module

Transmission shif ts out of all forward gears into hydraulic 4th gea r . Torque converter clutch is

•

open. All solenoid valves are de-energized.

• Maximum shift pressure applied to the power-transmitting elem ent s.

• Reverse gear can be engaged. Selector lever lock is ina ctive (“P” and “N”).

• All the segments of the gear display are dark.

• The TCM is completely inoperative and it is not possible to initiate the on-board diagnostic.

5.3.8 VW/Audi T ransmission Emergency Operation—01V

If an electrical fault occurs, and depending on the TCM, eme rgency operation m ay use two different limp-home programs to preve nt transmission da mage while re t aining the ability of the vehicle to move. In either mode, all segments of gear indicator usually light up.

Emergency Operation 1

In the absence of certain signals, the TCM switches to maximum modulation p ressure (pr essure for actuating shift elements). Clutches and b rakes in the transmission ar e rapidl y operated and protected against damage. The transmission will shift harshly in this mode.

Emergency Operation 2

In the absence of certain signals or actuator circuits, the TCM de-energizes the relay for the solenoid valves. The solenoid valves in the valve assembly are deactivated, thus preventing gear selection. If this occurs while the engine is running, 4th gear is enga ged. If the vehicle is braked to a standstill, the engine cuts out since 4th gear is a direct mechanical drive with no converter action. On restarting the engine, it is possible to dr ive in 2nd g ear and r everse.

Testing T esting Electronic Throttle Systems

NOTE:

i Two important relays are hou sed in the con trol modu le. The solen oid-valve r elay serves as a

safety relay and is de-energized in limp-home mode as is the relay for the cruise control system.

5.4 Testing Electronic Throttle Systems

The following sections contain scan tool testing information for VW/Au di electroni c throttle systems.

5.4.1 Throttle V alve Control Module Adaptation

All 1996 VW/Audi electronic throttle systems require adaptation. T here are dif fe rent electronic throttle types as described further in this section, but all types r equire the a dapt ation procedure whenever one of the following has occurred:

• Throttle V alve Control Module, ECM, or TCM is removed or replaced.

• Power supply to control module is interrupted.

• Low or disconnected battery.

• Codes are cleared.

What the Adaptation Process Does

The adaptation process involves the control mo dule lea rning the different throttle valve positions so that it knows the exact throttle position. It compares previous voltage readings with new voltage reading inputs from two angle position sensors located inside the thro ttle actuator ho using. If the adaptation procedure is successful, these new positions are stored in the control module. Simply put, throttle adaptation is the control module learning exact throttle positions against p revious preprogrammed values. If the two sets of readings exceed the range of tolerance, an error is reported.

Typica l conditio ns befo re thro ttle adap t ation includ e the following:

• Key on engine off.

• No stored DTCs.

• Battery Volt ag e of at least 11.5 volts.

• All electrical consumers switched off (lights, he ater fan, etc.) .

• Throttle must be in closed position (foot off accelerator pedal).

• Engine coolant temperature between 41–212°F (5 –100°C). Ce rt ai n vehicles may req uire

above 176°F (80°C).

• Intake temperature less than 212°F (100°C).

Performing throttle body adaptation

Throttle body adaptation is performed using Basic Se ttings listed under th e Functional Test menu (“Basic Settings” on page 45) or in Expert Mode (“04-Basic Settings” on page 22). If selected in

Testing T esting Electronic Throttle Systems

NOTE:

Functional T est s, the automated menu will prompt you through the process. If using Expert Mode, see the Readiness Code Chart Manual for the exact application procedure. If applicable, throttle adaptation is always one of the first step s in the ch art.

Readiness Codes always need to be reset after codes are cle ared or the battery has be en disconnected. Throttle body adaptatio n relearn (p ar t of Readin ess Code p rocedu re) is essential and may prevent the engine from starting (it can also cause MIL to go on or cause driveability problems). Clearing codes using a Generic OBD-II scan tool has the same effect.

i Clearing codes may not change throttle body adaptation status to NOT READY (060 or 098), but

performing a throttle body adaptation af ter clearing cod es is recommende d to ensure no problems. See the Volkswagen/Audi OBD-II Readiness Code Charts for more informa tion.

An unsuccessful adaptation may be caused by any of the following:

• Throttle valve is unable to close because of dirt or carbon b uildup.

• Battery voltage is too low.

• Throttle body actuator connector is loose or cont act s are corro ded or dam aged.

• Throttle valve housing is distorted (check bolts for prope r torque) .

• Engine was started or throttle was depressed d uring the adapt a tion.

The scan tool performs the adaptation proc ess by sending the co rrect co mmand to the co ntrol module using a special operation mode called Basic Settings ( see “Basic Settings” o n p age 45). After the scan tool sends the command to st a rt the test, th e control modul e sends the test measurements and the final adapt ation result back to the sca n tool.

i Throttle body faults may also cause misfire faults.

If a throttle body faults occur , try to set adapt ation again. If errors still occur, check and clean the throttle body . Attempt to set the ad apt ation again. If errors are still present, check for wiring and connection problems between the throttle body and the control module.

What should I do if I get pedal position faults?

If pedal position faults occur , first check the wiring by using scan tool in measuring block 62, which will allow you to see both pedal sensors. Look for one pedal position sensor not responding.

Next, check the connectors at throttle body and the control module. Check the wiring for continuity . Throttle body or pedal position faults ma y be cause d by any of the follo wing:

• If the MIL stays on after the engine starts, the throttle body may be failing self-test at st artup.

• Cell phone antennas and cables can cause electromagnetic interfer ence pro blems.

Electronic throttle systems are sensitive to a low or disconnected battery, especially if the ignition was left on. With a low battery , adapt ation settings may erase, wh ich may cause poor idle or poor throttle response (emergency run mode). On the 2000/20 01 Type III throttle actuator, this may cause a start and die condition. With this condition, the MIL may be on with a fault code set. The fault code will not clear until throttle body adaptation is performed. Throttle body adaptation reset procedure is done in Basic Settings Mode (04). See “Basic Settings” on p age45.

Testing T esting Electronic Throttle Systems

In an emergency, there is an alternative, less reliable method. Turn the ignition on for at least six seconds without operating the starter or depr essing the accelerato r peda l. The contr ol module must register a Learning Requirement in order for this pro cedure to work be cause p reviously stored voltage readings from the angle se nsors do no t correspo nd to the ne w volt age readings.

Electronic throttle valves are sealed units and are not se rviceable. In ternal compon ent failure means replacing a complete unit.

5.4.2 Electronic Throttle Types

Due to availability at the time of this writing, the information below references VW, but the information regarding the three electronic throttle control systems is applicable to Audi (throttle system type by years is the same for Audi). The types listed below were deve loped for VW only.

Type I

VW Electronic Throttle V alve Control started in 1996 with the M5.9 management system. This first design replaced the separate Throttle Position Sensor and Idle Air Control Valve. This first electronic throttle body module still has a throttle cable (not full Drive-by-Wire system). This early style controls idle speed only by means of a movable throttle stop controlled by an electric servo motor which is connected to the throttle plate. Within the sealed housing (no adjustment capability) are the following 4 components:

• Throttle Position Sensor (G69)

• Closed Throttle Position (CTP) switch (F60)

• Throttle Position (TP) sensor (G88)

• Throttle Position (TP) actuator (V60)

The G69 sensor has a full range (reads actual throttle plate position) 0.5–5.0V reference signal (called Throttle Position Sensor (V) on the scan tool). Voltage is high at idle, about 4.0–4.5V and low, about 0.3–0.8V, at wide open throttle (WOT).

The G88 sensor reads the position of the idle or bottom throttle stop position of the actuator. On this sensor (called Throttle V alve Adjuster (V) on the scan tool), voltage no rmally reads in the 3–4 V range. This type of sensor provides feedback on the throttle positio n actuator and the throttle stop position. Input voltage is crosschecked against the input vo lt age fr om the G6 9 sensor for plausibility . This G88 sensor, which has a reduced voltage range, changes minimally when the throttle is moved and the engine is running. The actuator only controls idle speed and opens during deceleration. Scan tool display group 060 or 098 (Throttle Valve Adjuster) at idle, part-throttle, and WOT:

Idle: THROTTLE POSITION SENSOR (V)______________________________________ 4.380

THROTTLE VALVE ADJUSTER (IDLE)____________________________________ 3.680 THROTTLE ADJUSTER MODE___________________________________________IDLE ADAPTATION STATUS___________________________________________________ OK

Testing T esting Electronic Throttle Systems

Part-throttle: THROTTLE POSITION SENSOR (V)_______________________________________ 3.90

THROTTLE VALVE ADJUSTER (IDLE) (V)__________________________________ 2.28 THROTTLE ADJUSTER MODE__________________________________________PART ADAPTATION STATUS___________________________________________________ OK

WOT: THROTTLE POSITION SENSOR (V)________________________________________ 0.8

THROTTLE VALVE ADJUSTER (IDLE) (V)__________________________________ 1.66 THROTTLE ADJUSTER MODE________________________________________ENRICH ADAPTATION STATUS___________________________________________________ OK

With the key on and the engine off, Thro ttle V alve Adjuster ( Idle) (V) voltage does not change with throttle movement. With the engine running and throttle movement, volt age change is minimal and lags behind the actual Throttle Position Sensor . Also note that actual Throttle Position Sensor has opposite voltage graph patte rn to eng ine speed (high at idle and low at WOT) .

Type II

The next type of electronic throttle system came out in 1998 with the VW M5.9.2 engine management system. It is similar to Type 1 (still has a throttle cable) except that cruise control is now integrated into the throttle valve control module. The important difference from Type I is that the scan tool does not display throttle position voltages. Instead, the scan tool disp lay reads throttle angle (degrees) and percent. Also diff erent fro m Type I, Throttle Valve Angle now increases with engine speed (moves up and down in the same direction), while Thr Valve Adjuster moves in the opposite direction to throttle or engine speed.

Some vehicles may also read Display group 054 (Idle control) which includes Thr Valve Adjuster in degrees (THR ADJ (°) in a Codes & Data screen). Scan tool display group 060 (Th rottle Valve Adjuster):

THROTTLE VALVE ANGLE (degrees) ________________________________________2 THR VALVE ADJUSTER (%) _____________________________________________ 75.2 OPERATING MODE ENGINE_____________________________________________IDLE ADAPTATION STATUS___________________________________________________ OK THROTTLE VALVE ANGLE (degrees) _______________________________________36 THR VALVE ADJUSTER (%) _____________________________________________ 57.6 OPERATING MODE ENGINE____________________________________________PART ADAPTATION STATUS___________________________________________________ OK THROTTLE VALVE ANGLE (degrees) _______________________________________85 THR VALVE ADJUSTER (%) _____________________________________________ 39.2 OPERATING MODE ENGINE____________________________________________ FULL ADAPTATION STATUS___________________________________________________ OK

Type III

The third type is the full Drive-by-Wire electronic throttle module that came out in 2000 (VW) on the M7.0, M7.1, M7.5.1 engine management systems. This system is easily recognized by the absence of a throttle cable. The accelerator pedal has two position sensors (variable resistors) both installed in a single housing and connected to the accelerator pedal. Th e throttle valve is actuated by a servo motor (throttle valve positioner) which is control module-controlled. There are two throttle valve angle sensors which measure throttle valve position. Each one sends its own

Testing T esting Electronic Throttle Systems

NOTE:

signal to the control module. Dual sensors are used for backup plausibility on both the accelerator position and throttle actuator position sensors in case one fails.

Emergency Running or Limp-Home Mode

There are two emergency running modes for accelerator p edal sensor failu re; one for when on e accelerator pedal sensor fails, and one for when both accelera tor peda l sensor s fail.

When one accelerator pedal sensor fails:

• Accelerator position is limited to a predefined value.

• Brake pedal switch on indicates idling speed.

• If there are implausible signals between sensors, then the lower value is used.

• Comfort functions are disabled.

• Electronic Engine Power (EPC) light is illuminated.

When both accelerator pedal sensors fail:

• EPC light is illuminated.

• Engine runs only at idle speed.

There are three emergency running modes for throttle actuator module failure. One for when one throttle valve angle sensor fails, one for when the throttle valve actuator fails or malfunctions, and one for when throttle valve position is not recognize d.

When one throttle valve angle sensor fails, engine power output is greatly red uced. When the throttle valve actuator fails or malfunctions (both ang le sensors are g ood) a nd when

throttle valve position is not recognized (implausible signals):

• Volt age to the actuator is shu tof f.

• Throttle valve defaults to mechanical stop position.

• Engine speed is limited to 1200 RPM.

It is important to note that the control module can open and close the throttle valve indepen dently of the driver. For example, under certain conditions, such as during traction control or electronic transmission shift optimization controlling engine torque, the driver’s foot may have little or no affect on acceleration. This system is an integrated subsystem, complete with its own on-board monitoring system and EPC indicator light.

EPC Indicator Light Operation

The EPC dash warning lamp is used for the Electronic Throttle Control System (Drive-by-Wire). The control module checks the throttle contro l system and turns the EPC light of f if all checks out OK. It also turns the EPC light on if it detects a malfunction. Codes are stored and read at the control module.

i Field technicians note that in addition to Drive-by-Wire faults, th e EPC light may also be turned on

for other engine non-emission related faults. If a fault is emission-r elated an d EPC-related, th en both MIL and EPC lights may be on.

Testing Te stin g ABS Syst ems

NOTE:

i At idle, neither the Throttle Valve Angle Sensor nor the Accele rato r Pedal Position Sensor are

monitored for faults. If the accelerator pedal modu le becomes disconnected, it may not set a code nor turn the EPC light on (field reports indicate that in some cases a throttle body code may set). In this condition, the engine only idles and does not respond to accelerator input.

Here is an example of a late model Drive-by-Wire dat a as r ead on the sca n tool in displa y group 062 (EPCSYSTEM):

IDLE: THROTTLE VALVE ANGLE SNS 1 (%) _______________________________________11

THROTTLE VALVE ANGLE SNS 2 (%) _______________________________________87 ACCEL.PEDAL POSITION SNS 1 (%)________________________________________14 ACCEL.PEDAL POSITION SNS 2 (%)_________________________________________7

WOT: THROTTLE VALVE ANGLE SNS 1 (%) _______________________________________87

THROTTLE VALVE ANGLE SNS 2 (%) _______________________________________11 ACCEL.PEDAL POSITION SNS 1 (%)________________________________________76 ACCEL.PEDAL POSITION SNS 2 (%)________________________________________38

Readings for Throttle V alve Angle Sns 1 & 2 are inverse to each other at idle and WOT. Also note that Accel Pedal Position Sns 1 is double Accel Pedal Position Sns 2 (this is true for any pedal position).

5.5 Testing ABS Systems

The following sections contain scan tool testing information for VW/Audi antil ock brake systems (ABS).

i The VW/Audi vehicle communication software starts VW/Aud i US VIN ID in 1991 a nd only

identifies those ABS systems with Codes and Data (does not retrieve blink codes).

The scan tool communicates with the VW ABS systems in Table 5-11.

Table 5-11

VW ABS system applications (part 1 of 2)

ABS Systems Codes Data

ABS 20 IE CAN YES YES ABS 30 IE CAN YES YES

ABS 5.3 Front YES YES ABS 5.7 Front YES YES

ABS Bosch 5 YES YES

ABS Front MK60 YES YES

ABS ITT AE 20 DI YES YES

ABS Teves 04 YES NO

ABS/ASR 5.3 Front YES YES

Testing Te stin g ABS Syst ems

Table 5-11 VW ABS system applications (part 2 of 2)

ABS Systems Codes Data

ABS/EDS 20 IE CAN YES YES

ABS/EDS 5.3 YES YES

ABS/EDS 5.3 Front YES YES

ABS/EDS 5.3 Quattro YES YES

ABS/EDS Bosch 5 YES YES

ABS/EDS ITT AE 20 GI YES YES

ABS/EDS Teves 02 YES NO ABS/EDS Teves 04 YES NO

ABS/ESP Allrad YES YES

ABS/ESP Front YES YES ASR 20 IE CAN YES YES

ASR Front MK60 YES YES

Bremson-Elektronik YES YES

ESP 20 CAN YES YES

ESP 5.3 T4 Front YES YES

ESP 5.7 Allrad YES YES

ESP 5.7 Front YES YES

ESP 5.7 RS YES YES

ESP Allrad MK60 YES YES

ESP Front MK60 YES YES

Table 5-12 lists VW ABS systems and Table 5-13 lists Audi ABS systems.

Table 5-12 VW ABS types and system descriptions (part 1 of 2)

ABS T ype Year/Model Codes/Data Connector

• 1990 Jetta GLI (9A) Blink codes

TEVES MK II

ABS/EDL

TEVES MK IV

ABS/EDL

EDL = Electronic Differential Lock; ASR = Anti-Slip Regulation; ESP = Electronic Stability Program

• 1991–92 Jetta GLI (9A) Codes and Data

• 1989–91 Corrado (PG) Blink codes

• 1992 Corrado (AAA) Codes and Data

• 1994–95 Jetta VR6 (AAA)

• 1995 Cabriolet (ABA)

• 1993–95 Golf (ABA)

• 1995 Golf/GTI VR6 (AAA)

• 1993–94 Corrado (AAA)

• 1992–95 Passat (AAA)

Codes and Data

Gear lever box under shift lever cover. White/ Black connector

The connector may be in one of three locations. See Table 3-3 on page 13 for connector location information.

Testing Te stin g ABS Syst ems

Table 5-12 VW ABS types and system descriptions (part 2 of 2)

ABS T ype Year/Model Codes/Data Connector

TEVES ITT MARK 20

ABS/EDL

Smaller pump than

TEVES MK IV

TEVES 60 IE/EDL/

ASR/ESP/Front

wheel drive or

4Motion

ABS/EDL/ASR/ESP

No mechanical brake

pressure regulator

EDL = Electronic Differential Lock; ASR = Anti-Slip Regulation; ESP = Electronic Stability Program

• 1996 Passat (AAA)

• 1997/8–2000 all models

• 1998–2005 New Beettle

• All 2003 models

• 2005 New Golf GTI

• 1997–2003 Eurovan (Bosch

5.0/5.3)

• Up to 2001 Passat (Bosch 5.3)

• 2002–03 Passat (Bosch 5.7)

• 2004–05 Phaeton (Bosch 5.7)

Codes and Data

OBD-II DLC under left side of dash

Table 5-13 Audi ABS types and system descriptions

ABS T ype Year/Model Codes/Data Connector

• 1996–88 5000 Quattro

• 1988–92 90/90 Quattro

BOSCH II ABS

BOSCH 5.0

ABS/EDL

BOSCH 5.3

ABS/EDL/ASR/ESP

BOSCH 5.7

ABS/EDL/ASR/ESP

ABS/EDL/ASR ITT

Mark 20 IE

MARK 60 IE

ABS/EDP/ESP ITT

EDP = Electronic Brake Distribution

• 1992–94 80

• 1992–94 S4

• 1994 100

• 1995 A6/A6 Quattro

• 1996–97 A6 Codes and Data

• 1998–2002 A4/A6/A8

• 2002-2004 A4

• 2003-2004 A4 Cabrio

• 2004 S4

• 2004 A8L

• 2001–02 A4

• 2001–04 A6

• 2005 TT

• 2003–05 TT

• 2005 A3

None None

Codes

Codes and Data

Auxiliary relay station 1 at rear of engine compartment

OBD-II DLC under left side of dash

Testing Testing Immobilizer Systems

WARNING

NOTE:

Important Tips for Audi ABS Testing

• In many of the newer models, there will be a series of beeps from the dash when you access

the ABS controller (and the ABS light will be on during diagnostics). This is normal and is done to notify the driver that the ABS is nonfunctional while in diagnostic mode.

Risk of erratic vehicle response.

• Do not use the Output Tests function on any system while the car is in motion. Running Output Tests on the ABS can temporarily disable brakes entirely and cause individual wheels to lock and unlock.

Erratic vehicle response can cause serious injury.

5.5.1 ABS Basic Settings

Basic Setting must be selected from Expert Mode to perform the following for late model traction and stability control:

• Zero position adjustment of steering angle sensor.

• Test the plausibility of sensor signals (yaw and press) for transverse acceleration.

• Any brake bleeding on systems equipped with Electronic Stability Control (ESP) (ESP

hydraulic pump requires basic settings to bleed).

i ABS/ESP Basic Setting brake bleeding usually requires login.

z To login for ABS/ESP Basic Setting brake bleeding:

1. Select 03-ABS/EDL/ESP/TCS.

2. Select 11 Login.

3. Enter Login Code from Service Manual (varies with model a nd year).

4. Select channel 002.

5. Follow procedure from the Service Manual.

5.6 Testing Immobilizer Systems

i All Immobilizer functions must be done in Expert Mode.

In the US, Volkswagen has th ree generation s of antithef t syste ms. The first syste m was used in the early 1990 s. The 1996–99 Golf/Jett a may have a key fob with a

transmitter used for remote activation of the Pneumatic Central Locking System. This system has no self-diagnostic capability and is nothing more than series of micro switches in the doors, hood and trunk and a starter lockout. When arme d, the alarm would sou nd if a door, hood or trunk was opened and the starter circui t would b e deactiva ted. The import a nt aspect to reme mber here is that this system does not have an ignition key immobilizer, it is an alarm system only.

Testing Testing Immobilizer Systems

The second system, Immobilizer II. It came out on some 1999 models, but was used only on the 2000/2001 Golf, Jetta and New Beetle. Immobilizer II uses an electronic key that prevents the engine from starting without a matching key microchip. There is a symbol in the instrument cluster showing a key inside a car. If a new (or different control module) is installed in the vehicle, the Immobilizer prevents the engine from running and causes the symbol to flash. The scan tool performs all of the adaptation functions on the Immobilizer II system including new key adaptation, but only if the 4-digit security code is available for that specific vehicle. This security code may be found under a scratch-off ta g on th e key fob or a scratch-off tab on the instrument cluster (which has to be removed to inspect).

The third system, called Immobilizer III, came out on some VW mo dels in ap proxi mately 1999. Electric door locks replaced the pneumatic locks and Radio Remote Key fobs are r eplaced with either a straight or switchblade-type key that has an embedded transmitter. Immobilizer III also uses an electronic key . The Immobi lizer prevents the engine from running without a matching key microchip. There is a symbol in the instrument cluster showing a key inside a car. If a new (or different control module) is installed in the vehicle, the Immobilizer prevents the car from running and causes the symbol to flash. The Immobilizer III system has self-diagnostic capability for both the remote and Locking Security System. The Immobilizer III system incorporates 4 systems:

• Central Door Lock System (35)

• Comfort System (46)

• Electronic Instrument Panel (17)

• Engine Control Module (01)

5.6.1 Important Tips for Testi ng Immobilizer III Systems

• Key matching is performed using an adaptation func tion in the Comfort System (46). With this

system, a 7-digit secret key code (SKC) is required in order to perform any adaptation routine on most models. However , so me early (199 9) models use the 4-digi t security cod e from the Immobilizer II system.

• The 7 digit security code routine changes depending on whether you are usin g a brand n ew

control module that has never been in any other car , or if you are using a used control module that has been previously matched to another car. See “Immobilizer II Engine Control Module Replacement Adaptation” on page 77.

• The scan tool does not perform the Immobilizer III key adaptation function. The system

requires a special 7-digit secret key code (SKC) currently only obtain ed from the VW or Audi dealer. In the future, the factory tool may be hooked directly to a VW site and eliminate the need for the dealer to obtain the code. Howe ver, the scan tool does read the 14-digit Immobilizer control module identification number which must be provided along with the VIN to obtain the 7-digit security code. The scan tool also can perform ignitio n key matching to the key remote control system (see “Radio Frequency Remote Control Functions” on p age 81). The information on Immobilizer III key adaptation is only to help you understand the process given the extreme importance and ne ed. Please understand that this information is subject to change and is only current for the date at the time this manu al was written.

Testing Testing Immobilizer Systems

5.6.2 Audi Immobilizers

In the US, some early Audi models (1995–1996 A6) use the Infrared Remote key system a nd Pneumatic Central Locking that has no diagnostic capability . The 1997 A6, may have remote keys or a key fob with a transmitter to activate the central locking system. The remote key fob does not have diagnostic capability but the Central Locking does. Audi started using the Immobilizer III system in 1998.

5.6.3 Immobilizer Adaptation Procedures

The following sections provide Immobilizer adaptation procedures.

Immobilizer II Engine Control Module Replacement Adaptation

The following procedure introduces a new control module to the in strument clus ter. This must be performed each time the engine control module is replaced on a system with Immobilizer II.

z To perform control module replacement adaptation with Immobilizer II:

1. Install the new control module in the car.

2. Connect the scan tool to the vehicle and select Expert Mode (see “Initiating Expert Mode” on

page 19 for more information). The Expert Mode System Selection menu displays.

3. Select 17-Electronic Instrument Panel.

The Expert Mode Function Selection menu displays.

4. Select 10-Adaptation.

The Select Adaptation Channel screen displays.

5. Scroll in Channel 000 and press Y.

The Clear Adaptation Values confirmation screen displays.

6. Select to clear adaptation values.

The Adaptation Value Stored screen displays.

7. Select exit.

8. Select 06-Stop Communication.

9. Turn the ignitio n off for 10 seconds, then back on again. Lea ve the ignition on for two minutes

without starting the engine. After two min utes, st art the veh icle.

Key Coding (Adaptation)

The following procedure outlines the key coding (adaptation) procedure for the Immobilizer II (early Immobilizer III) systems that use a 4-digit security code. Currently, the scan tool cannot perform key matching or adapting using the 7-digit security code obtained from the dealer. The 4-digit security code was available through 1999 (Immobilizer II) and may be found under a scratch-off tag on the key fob, or on a scratch-off tab on the instrument cluster (which has to be removed to inspect). Al l ke ys mus t be av aila ble at the start of the adaptation procedure.

Testing Testing Immobilizer Systems

NOTE:

z To perform a key adaptation:

1. Connect the scan tool to the vehicle and select Expert Mode (see “Initiating Expert Mode” on

page 19 for more information).

2. Select 17-Electronic Instrument Panel (integrated immobilizer) or 25-Immobilizer if

separated. The Function Selection menu displays.

3. Select 11- Login Request.

4. Scroll in the 4-digit security code preceded with a zero (for example, 0XXXX).

5. Select to return to the Function Selection menu.

6. Select 10-Adaptation.

7. Scroll in 021 (or 001 for separate Immobilizer 25).

8. Scroll in the number of keys to be programmed and select to store.

After 2 seconds, the Immobilizer warning light in the dashboard should go off. The key in the ignition is now matched (adapted).

9. Select to return to the Function Selection menu.

10. Turn the ignition off and remove the key fr om the ignition switch

1 1. Insert the next key into the ignition switch and turn the ignition switch on.

The dashboard Immobilizer warning light should go on for about 2 seconds, then go out.

12. As soon as the warning light goes out, turn the ignition off and remove the key.

This key is now matched (adapted).

13. Insert the next key into the ignition switch and turn the ignition switch on (within 30 second s)

and repeat procedure.

i All keys must be inserted and the ignition switch turned on within 30 seconds after removing the

last key .

14. After all keys are adapted, exit to return to the Function Selectio n menu.

15. Select 06-Stop Communication before disconnecting the scan tool.

i Any keys that are not present for the adaptation will not be recognized by the vehicle after the

matching has completed. Any keys that are not adapted cause the Immobilizer light to flash. If a mismatched or unadapted key is used to start the car, the engine starts, runs for 2 seconds, and then dies.

Immobilizer III Engine Control Module Replacement Adaptation

The following procedure introduces a new control module to the in strument clus ter. This must be performed when the engine control module is replaced on an Immobilizer III system.

z To perform control module replacement adaptation with Immobilizer III:

1. Measure battery voltage.

Volt age should be maint ain ed at 12.5V o r higher.

2. Install the new control module in the vehicle.

Testing Testing Immobilizer Systems

3. Connect the scan tool to the vehicle and select Expert Mode (see “Initiating Expert Mode” on

page 19 for more information). The System Selection menu displays.

4. Select 01-Engine Management Master.

The ECU ID screen displays.

5. Verify that the VIN and the 14-digit Immobilizer serial number have been written to the new

control module by checking the ECU ID. If they have not been written automatically to the new control module from the instru ment

cluster, a row of Xs displays, indica ting that this action cannot be performed with the scan tool (requires 7-digit security code). If the VIN and the 14-digi t serial number display , continue with the following steps to validate that the control module was coded correctly.

6. Select to proceed to the Function Selection menu.

7. Select 07-ECU Coding to make sure the control module coding is correct.

8. Select to return to the Function Selection menu.

9. Perform a Readiness Code Setting. See the “Volkswagen/Audi OBD-II Readiness Code

Charts” supplement manual for det ails.

Immobilizer II and III Adaptation: Remote Key Programming (Integrated Remote)

New or additional ignition keys must be matched to the Immobilizer and comfort system control electronics. The matching procedure must always be carried out for all the ignition keys, including the existing ones. The number of keys already matched will be displayed when the adaptation (matching) function is selected. You must have all ignition keys available to perform this procedure. If there is no existing ignition key, contact your VW/Audi dealer.

z To match ignition keys to radio frequency remote control:

1. Insert correct profile (mechanically-programmed key mar ked “W”) key into the ignition lock

(usually there is one mechanical key and 2 switchblade-type remote keys marked “W3”).

2. Connect the scan tool to the vehicle and select Expert Mode (see “Initiating Expert Mode” on

page 19 for more information).

3. Select 46-Comfort System.

4. Select 10-Adaptation.

5. Enter Channel 000 (erase all keys with channel number 000 ).

It is not possible to match new or additional keys without erasing existing keys.

6. Select to confirm the deletion of learned values.

7. Scroll in Channel 001.

All keys are “learned” with channel number 001.

8. Scroll to select the number of keys, including the existing mechanical key in the ignition

switch, (e.g. 00003) and select to confirm. There is a maximum of four possible keys that can be matched.

9. Select to exit back to the Function Selection menu.

10. Press the lock or unlock button for one second, once on each of the radio frequency keys to

be “learned” (in the example above, two keys). This must be completed within 15 seconds after exiting.

1 1. After all the remote keys are adapted, select 06-Stop Communication.

Testing Testing Immobilizer Systems

NOTE:

12. Switch off the ignition and remove the ignition key.

13. Test the remote keys for proper operation.

VW 1996–99 Remote Key Programming (Separate Remote)

Two keys and all remote controls that will be programmed are needed. A maximum of four keys can be programmed (old and new keys included).

z To program 1996–99 mechanical keys:

1. Insert the first key into the ignition switch and turn it to “ignition on.”

2. Insert the second key into the outer door handle and turn it to th e unlocked position for

10 seconds. The system alarm will beep three times.

3. Press button 1 on the first remote control to be programmed.

The system alarm will beep two times.

4. Press button 1 on the second remote control to be programme d.

The system alarm will beep two times.

5. Do the same for any further keys you wish to program.

i All remote controls must be programmed within one minute, otherwise the new programming will

be cancelled.

6. Turn the key in the oute r door ha ndle to the u nlocked po sition for 1 0 seconds.

The system alarm will beep once.

7. Switch the ignition off.

Important Tips for Setting Immobilizer Adaptations

• All keys are “learned” in one matching sequence.

• 15 seconds must not be exceeded when matching all ignition keys (pressing either the lock or

unlock button).

• A successful adaptation can be determined via Read Measured Value Block, function 08,

display group number 013. The operation of th e radio fr equen cy unit measure ment values must have the status OK. Simultaneously , the last measurement value will show the positional number of the key (i.e. first, second, third, fourth).

• If the remote control key is operated several times, th e third display “n o measur ed value”

changes to “OK.”

• The matching of ignition keys is automatically terminated when: – Number of keys to be matched is reached. – A button of one of the keys to be “learned” is pressed frequently. – Permissible matching period of 15 seconds is exceeded (DTC is stored).

• Select function 02-Check DTC Memory. If there is no DTC stored, the matching of the keys

has been successfully completed.

Testing Testing Immobilizer Systems

NOTE:

5.6.4 Radio Frequency Remote Control Functions

The functions in Table 5-14 on page 81 are examples of remote control variations that can be adapted by selecting 46-Comfort Systems > 10-Adapt ation > chan nels 003–010 .

z To change the battery in the remote key:

1. Insert a screwdriver in the slot between the transmitter unit -1- and the main key.

2. Move the screwdriver to unclip the transmitter unit from the main key.

3. Pry the transmitter unit apart o n the two locatin g lugs.

4. Unclip the upper battery from the ret ainers with a screwdrive r. The contact plate has two straight edges. When these edges are turned towa rd the retainers,

the contact plate can be removed. The contact plate can also be unclipped with a screwdriver .

5. Unclip the lower battery from the retainers with a scre wdriver.

Table 5-14

Channel 1998 1999–2000 Condition

Sample remote key option settings

Passat, New Beetle, New Jetta, New Go lf

05 Unlock: Horn sounds 06 Lock: Horn sounds Unlock: Horn sounds 07

08 Lock: Turn signals flash once 09 — Lock: Turn signals flash once 10 —

Auto-lock: Vehicle is locked at 10 MPH (15 KPH)

Interior monitoring switch off (if equipped)

Unlock: Turn signals flash twice

Auto-lock: Vehicle is locked at 10 MPH (15 KPH)

Auto-unlock: Vehicle is unlocked when key is removed

Interior monitoring switch off (if equipped)

Lock: Horn sounds Unlock: Turn signals flash

twice

Not for North American vehicles

1 = On 0 = Off

—

6. Place the battery with the positive terminal downward into the transmitter (positive terminal is marked on the housing).

Note the polarity and correct position when installing the batteries.

7. Place the contact plate on the battery.

8. Place the battery, with the positive terminal downward, onto the contact plate and secure.

9. Place the transmitter halves together and clip to fasten.

10. Engage the transmitter unit with the main key.

i When operating a radio wave remote control, the LED must flash briefly . If the LED does not flash,

the battery is discharged and must be replaced.

Testing Testing Immobilizer Systems

5.6.5 Immobilizer Frequently Asked Questions

Refer to the following frequently asked questions for additional info rmation.

How do you tell if you have an Immobilizer?

With the key on and engine off, look for a yellow key dash light which shou ld come on momentarily and then off.

What does a flashing key dash light mean?

If it does not go out and starts flashing, then the Immobilizer has detected a problem and most likely the engine will not start.

What are the possible causes for the Immobilizer light to flash?

• Wrong ignition key was inserted into the ignition switch

• Faulty key transponder

• Faulty control module

• Faulty Instrument Cluster

What should always be done after working on the Immobilizer system?

• Check and clear any engine faults.

• Check and clear any Immobilizer (25) faults.

• Check and clear any CAN bus (19) faults.

• Check and clear any Instrument Cluster (17) faults.

How do you tell if you have Immobilizer II or III?

Immobilizer III knows the VIN, which is imbedded in the CAN bus control unit.

z To distinguish between Immobilizer II or III:

1. Connect the scan tool to the vehicle and select Expert Mode (see “Initiating Expert Mode” on page 19 for more information).

2. Select 17-Electronic Instrument Panel or 25-Immobilizer (Sep a rated) .

3. Select until the ECU ID screen displays. If you see something like “Immo-ID VWZ7Z0W0648696”, you have Immobilizer II. If you see something like “WVZKB58001H231169 VWZ7Z0W0648696”, you have

Immobilizer III. The first 17-digit string is the VIN. The second 14-digit string is the Immobilizer identification number.

What does the scan tool do on Immobilizer II?

It can perform all Immobilizer functions if the 4-digit, vehicle-specific security code is known.

T esting Testing Electronic Instrument Panel Systems

Does the scan tool work on Immobilizer III?

Yes. The scan tool can do key matching to the remote system and remote key adaptation. However, the scan to ol cannot adapt ne w keys or adapt either an control module or Instrument Cluster to the Immobilizer III system.

Is the key matching to the remote system the same procedure for Immobilizer II or III?

Yes, although there may be different remote key option configurations depending on the vehicle.

5.7 Testing Electronic Instrument Panel Systems

The following sections provide information for testing electronic instrument panel systems.

5.7.1 Electronic Instrument Panel Types

There are several types of Electronic Instrument Panels and the possibilities of each type are described in the following sections.

Electronic Instrument Panel, Type A

The available functions are:

• Reset Service Interval Oil(Km)

• Reset Service Interval Insp1(Km)

• Reset Service Interval Insp1(Days)

• Reset Service Interval Insp2(Days)

After an Oil Service, the following must be used:

• Reset Service Interval Oil(Km)

After an Inspection 1, the following must be used:

• Reset Service Interval Oil(Km)

• Reset Service Interval Insp1(Km)

• Reset Service Interval Insp1(Days)

After an Inspection 2, the following must be used:

• Reset Service Interval Oil(Km)

• Reset Service Interval Insp1(Km)

• Reset Service Interval Insp1(Days)

• Reset Service Interval Insp2(Days)

T esting Testing Electronic Instrument Panel Systems

Electronic Instrument Panel, Type B

The available functions are:

• Reset Service Interval

• Pre-set V alue Oil(Km)

• Pre-set Value Insp1(Km)

• Pre-set Va lue Insp1(Days)

• Read, Set Km Remaining To Oil Service

• Read, Set Km Remaining To Insp1

• Read, Set Days Remaining To Insp1

After any service, with the dashboard service indication on, th e followin g must be used :

• Reset Service Interval

After an Oil Service, with the dashboard service indication off, such as a premature service, use the following function:

• Read, Set Km Remaining To Oil Service

After an Inspection 1, with the dashboard se rvice indication of f, such as a premature se rvice, use the following functions:

• Read, Set Km Remaining To Insp1

• Read, Set Days Remaining To Insp1

Electronic Instrument Panel, Type C

The available functions are:

• Pre-set V alue Oil(KM)

• Pre-set V alue Oil(Days)

• Pre-set Va lue Insp1(Days)

• Pre-set Value Insp2(KM)

• Read, Reset Km After Oil Service

• Read, Reset Days After Oil Serv .

• Read, Reset Days After Insp1

• Read, Reset Km After Insp2

After performing the Oil Service, the following functions must be used:

• Read, Reset Km After Oil Service

• Read, Reset Days After Oil Serv .

After performing the Inspection 1, the following function must be used:

• Read, Reset Days After Insp1

After performing the Inspection 2, the following function must be used:

• Read, Reset Km After Insp2

T esting Testing Electronic Instrument Panel Systems

Electronic Instrument Panel, Type D

The available functions are:

• Pre-set V alue Oil(Km)

• Pre-set Va lue Insp1(Days)

• Read, Reset Km After Oil Service

• Read, Reset Days After Insp1

After an Oil Service, the following function must be used:

• Read, Reset Km After Oil Service

After an Inspection 1, the following function must be used:

• Read, Reset Days After Insp1

Electronic Instrument Panel, Type E

The available functions are:

• Reset Service Interval

• Pre-set V alue Oil(Km)

• Pre-set Va lue Insp1(Days)

• Read, Reset Km After Oil Service

• Read, Reset Days After Insp1

After any service, with the dashboard service indication on, th e followin g must be used :

• Reset Service Interval

After an Oil Service, with the dashboard service indication off, i.e. a premature service, the following function must be used:

• Read, Reset Km After To Oil Service

After an Inspection 1, with the dashboard service indication off, i.e. a premature service, the following function must be used:

• Read, Reset Days After Insp1

Electronic Instrument Panel, Type F

The Type F Instru ment Panel can be progr ammed to us e fixed or flexible Service Intervals (Table 5-15). For a fixed interval, the variables are set15,000 KM. For flexible Service Intervals, minimum distance is set to 15,000 KM and Maximum is set to 30,0 00, 3 5,000 or 50 ,000 KM.

Table 5-15

Vehicles with fixed intervals (Oil Quality 1) Fixed intervals (15000 kilometers, 9300 miles) Gasoline engines (Oil Quality 2) Flexible intervals (30000 kilometers, 18600 miles) 6-cylinder diesel engines (Oil Quality 3) Flexible intervals (35000 kilometers, 21700 miles) Diesel engines (Oil Quality 4) Flexible intervals (50000 kilometers, 31000 miles) Insp1 has a factory setting of 365 days (1 year) for fixed intervals and 730 days (2 years) for flexible

intervals.

Service intervals

Vehicl e Type Interval Type Required

T esting Testing Electronic Instrument Panel Systems

The available functions are:

• Reset Service Interval

• Pre-set V alue Oil Quality(Km)

• Pre-set V alue Min Oil(Km)

• Pre-set V alue Max Oil(Km)

• Pre-set Va lue Insp1(Days)

After the Inspection the following functions must be used:

• Pre-set V alue Oil Quality(Km)

Even when this number stays the same, this value must be changed. It is necessary for the internal housekeeping of the Instrument Panel. When the Oil Quality has been chang ed, check Minimum, Maximum and Insp1 for correct values, then reset the rest of the Instrument Panel.

• Reset Service Interval

Electronic Instrument Panel, Type G

The Typ e G Instrument Pa nel can be program med to use fixed or flexible Service Intervals. Interval variables are the same as for a Type F Instrument Panel. See Ta ble 5-15 on page 85 for service intervals.

The available functions are:

• Reset Service Interval

• Pre-set V alue Oil Quality(Km)

• Pre-set V alue Min Oil(Km)

• Pre-set V alue Max Oil(Km)

• Pre-set V alue Min Insp(Days)

• Pre-set Va lue Max Insp(Days)

After the Inspection the following functions must be used:

• Pre-set V alue Oil Quality(Km)

Even when this number stays the same, this value must be changed. It is necessary for the internal housekeeping of the Instrument Panel. When the Oil Quality has been chang ed, check Minimum, Maximum Oil and Minimum, Maximum Insp for correct values, then reset the rest of the Instrument Panel.

• Reset Service Interval

Electronic Instrument Panel, Type H

The available functions are:

• Reset Service Interval

• Pre-set V alue Oil(Miles)

• Pre-set Va lue Insp1(Days)

• Read, Reset Miles After Oil Service

• Read, Reset Days After Insp1

T esting Testing Electronic Instrument Panel Systems

After any service, with the dashboard service indication ON, the following must be u sed:

• Reset Service Interval

After an Oil Service, with the dashboard service indication OFF (a premature service), the following function must be used:

• Read, Reset Miles After Oil Service

After an Inspection 1, with the dashboard service indication OFF, (a premature service), the following function must be used:

• Read, Reset Days After Insp1

Electronic Instrument Panel, Type I

The available functions are:

• Reset Service Interval

• Pre-set V alue Min Oil(Km)

• Pre-set V alue Max Oil(Km)

• Pre-set V alue Min Insp(Days)

After the service the following must be used:

• Reset Service Interval

Electronic Instrument Panel, Type J

The Ty pe J Instrument Panel can be programmed to u se fixed or flexible Service Interval s. Interval variables are the same as for a Type F Instrument Panel (see Table 5-15 on page 85).

The available functions are:

• Reset Service Interval

• Pre-set V alue Oil Quality(Miles)

• Pre-set V alue Min Oil(Mi les)

• Pre-set V alue Max Oil(Miles)

• Pre-set Va lue Insp1(Days)

After the Inspection the following functions must be used:

• Pre-set V alue Oil Quality(Miles)

Even when this number stays the same, this value must be changed. It is necessary for the internal housekeeping of the Instrument Panel. When the Oil Quality has been chang ed, check Minimum, Maximum Oil and Minimum, Maximum Insp for correct values, then reset the rest of the Instrument Panel.

• Reset Service Interval

Electronic Instrument Panel, Type K

The available functions are:

• Reset Service Interval

Testing T est ing Air bag (SRS ) Syst ems

NOTE:

IMPORTANT:

After the service the following function must be used:

• Reset Service Interval

Refer to the vehicle owner’s manual for the actual values of the Service Interval settings.

5.8 Testing Airbag (SRS) Systems

There are currently three types of airbag (SRS) systems on VW/Audi vehicles. Airbag I came out in 1989 and was used until about 1993 for both VW and Audi. This system had

only one driver’s side airbag and limited diagnostics—codes only (no dat a). California emission equipped vehicles may have red, white and black connecto rs. The red connector is for the Airbag I system. If the vehicle is Federal emission equipped, then it may only have a red and bla ck connector. The airbag module on this system is p re-coded a t the facto ry (no ver sion coding) .

i T o read Airbag I codes without code definitions by hooking the white connector of the VW-1

adapter to the red vehicle connector and th e black VW-1 connector to the black vehicle connector.

Airbag II was used from 1994 to 1995 for Audi models and from 1 996 to 1998 for VW models. This SRS system displays codes and data and the module is ve rsion co ded. This system u ses pyrotechnics for seatbelt retraction and has dual airbags, one for the driver (steering whe el) and one for the passenger (front dash).

Airbag III is used from 1996 to 2003 for Audi models and from 1998 to 2003 for VW models. This system displays codes and data and the module is version coded. This system also uses pyrotechnics for seatbelt retraction and has dual airbags fo r the drive r (ste ering wheel) and passenger (front dash).

Note the following when working on SRS systems:

• 1993–94 VW vehicles may have no airbag systems.

• For Airbag I, Audi has recalled KF for a static electricity deployment problem. The re call

converts the system to an Airbag II module with codes and data but still has only the one driver’s side airbag. To see if recall has been done, lift up the rear seat and look for two separate modules bolted to the body sheet met al. If both modules have been removed and the harnesses are taped, then the recall has been performed. If th ese two module s are present, then recall has not been performed and should be don e.

• Airbag II and III systems are version coded. Be sure to use the late st version cod ing t able s

and that the battery is fully charged before coding the airba g modules. Cod ing is performe d with the key on, engine off. Battery voltage should not drop below 11.6V. High quality battery chargers with noise and voltage spiking suppression ar e recommend ed.

Coding and module corruption may occur if the battery goes dead du ring the co ding pr ocess.

• SRS components made for European vehicles are no t the same as fo r the US. Cer t ain

aftermarket sport steering wheels with SRS may be available for sale that do not meet U.S. SRS deployment specifications. Always identify the correct airbag system and verify the correct component configuration prior to version coding.

Testing Testing CAN Dat a Bus Systems

Data

Check

Data

Receive

Data

Check

Data

Receive

Data

Check

Data

Receive

Data

Provide

Data

Send

Data

Data Bus Line

5.9 Testing CAN Data Bus Systems

Late 2001 and early 2002 models started using a CAN (Controller Area Network) data bus, which affects diagnostics and how and when the scan tool is used. The CAN data bus ensures that the electronics in the vehicle still remain manageable and do not t ake up too much space. CAN means that control units are networked and interchange dat a.

1— ABS control module 2— Door control modules 3— Central control module 4— Transmission control module 5— electronic control module

Figure 5-1

CAN control unit network

The CAN data bus is made up of a controller, a transceiver, two data bus terminals, and two dat a bus lines. Apart from the data bus lines, the components are located in the control units.

Figure 5-2

CAN bus data transfer process

Testing Testing CAN Dat a Bus Systems

The CAN controller receives the transfer dat a from the microco mputer in tegrated in the con trol unit. The CAN controller processes this data and re lays it to the CAN transceiver. Likewise, the CAN controller receives data from the CAN transceiver, processes it and relays it to the microcomputer integrated in the control unit.

The data bus does not have a designated receiver . Da ta is sent over the dat a bus and is generally received and evaluated by all subscribers (modules on the dat a bus) .

5.9.1 Sources of Interference

Components which produce sparks o r in which electric cir cuit s are open or closed during operation can be sources of interference. Other sources of interference includ e mobile telephones and transmitter stations, or any other object which produces electromagnetic waves. Electromagnetic waves can affect or corrupt dat a transfer.

To prevent interference with the data transfer, the two data bus lines are twisted together so that the voltage on both lines is opposed. T hat means that if a voltage of approximately 0 Volts is applied to the one data bus line, the n a voltage of approximately 5 V olts is applied to the other line and vice versa. As a result, the total vo ltage remains consta nt at all times and the electromagnetic field effects of the two dat a bus lines cancel each other ou t. The data bus line is protected ag ainst received interference and is virtually neutral in sending interference.

5.9.2 Powertrain CAN Bus

The CAN data bus links the following:

• The Motronic Engine management control unit

• The ABS/EDL control unit

• The automatic gearbox control unit

The data bus operates at a speed of 500 kbit/s (5 00,000 b it s per second ). This mean s that it lies in a speed range (high speed) from 125 to 1000 kbit/s. A da t a pro tocol tr ansfer takes about 0.25 milliseconds. Each control unit tries to send its data at intervals of 7–20 milliseconds.

If more than one control unit wants to send its data protocol simultaneously, the system must decide which control unit comes first. For safety reasons, the data protocol supplied by the ABS/ EDL control unit is more important than the data protocol supplied by the engine control unit or automatic gearbox unit, so ABS/EDL data takes priority and is sent first. Table 5-16 demonstrates the order of priority of data on the CAN bus lin e.

Table 5-16

Priority Control Unit Example

Order of CAN bus information priorities in the drive train

1 ABS/EDL Request for Traction Control System (TCS) 2 ECU, data protocol 1 Engine speed; throttle valve position; kickdown 3 ECU, data protocol 2 Co olant temperature; road speed 4 TCM Gearshift; gearbox in emergency mode; selector lever position

Testing Testing CAN Dat a Bus Systems

NOTE:

i All control units which interchange information must be regarded as an integrated system during

self-diagnosis and troubleshooting. This means data displayed at one control unit may actually be shared from another control unit on the CAN Bus. Codes set in one control unit will often set codes in other control units which share the dat a bu s. Always clear codes in e ach control unit an d monitor in which control unit the codes return.

5.9.3 CAN Data Bus in the Convenience System

The following functions of the convenience system transfer dat a:

• Central locking

• Electric windows

• Switch illumination

• Electrically adjustable and heated door mirrors

• Self-diagnosis

In the convenience system, the CAN data bus currently co nnect s the contro l unit s of the convenience system. These are a central electronic unit (09) and two or four door Central door Lock (35) control units.

The lines of the control units converge at one point in a st ar p atter n. The advant a ge: if o ne of th e control units fails, the other control units are still able to send their data protocols. Each control unit tries to send its data at intervals of 20 milliseconds.

The following list describes how the information in the convenience system is prioritized:

1. Central control unit

2. Control unit on driver’s side

3. Control unit on front passenger’s side

4. Control unit on rear left

5. Control unit on rear right

Since the data in the comfort system can be transfer red at a relatively low speed, it is possible to use a transceiver with a lower power output. The advantage is that it is possible to change over to single-wire mode if a data bus line fails. The data can still be transferred.

Chapter 6 Data Parameters

The following chapters provide definitions and operating ranges fo r the Volkswagen and Audi vehicle data stream parameters.

The ECM provides two basic kinds of parameters: digital (or discrete) and analog:

• Digital (discrete) parameters are those that can be in only one of two st a tes, such as on or

off, open or closed, high or low, rich or lean, and yes or no. Switches, relays, and solenoids are examples of devices that provide discrete parameters on the control module data list.

• Analog parameters are displayed as a measured value in the a ppropria te units. Volt age,

pressure, temperature, time, and speed paramete rs are examples of analog values. The scan tool displays them as numbers that vary through a range of values in un it s, such as poun ds per square inch (psi), kilopascal (kPa), deg rees Celsius (°C) , degrees Fahre nheit (°F), kilometers per hour (KPH), or miles per hour (MPH).

The scan tool displays some data par ameters in numbers tha t range from 0 to 100, 0 to 255, o r 0 to 1800. These ranges are used because it is the range th at the cont rol module tra nsmit s for a given parameter. However, many parameter readings ne ver r each the hi ghest po ssible nu mber.

The maximum range of a parameter of ten var ies by year, model, and engine. On these applications, the word “variable” appears in the range heading. However, typical sampled values observed under actual test conditions are in the parameter description when avail able.

Parameters may also be identified as input signals or output commands.

• Input or feedback parameters are signa ls from various sensor s and switches to the control

module. They may display as analog or discrete values, depe nding upon the input d evice.

• Output parameters are commands that the control module transmit s to various actuators,

such as solenoids and fuel injectors. They are displayed as discrete (ON/OFF) p aramete rs, analog values or as a pulse-width modulated (PWM) sign al.

In the following section, parameters are presen ted as they a ppear on the scan too l screen . Most parameter descriptions are in alphabetical ord er, but there are exceptions. Often, the same parameter goes by a similar, but different, name when used on more than one model, engine, or control system. In these instances, all of the applicable parameter names, as displayed on the scan tool, are listed in alphabetical order before the de scription .

To find the description of a parameter, lo cate it in the al phabetica l index, the n go to the in dicated page. Parameters are listed in the index as they appear on th e scan tool scr een.

The data parameter descri ptions in this manual were created from a comb ination of sources. Fo r most parameters, some basic information was provided by the vehicle manufacturers, then expanded through research and field testin g. Pa rameter defini tions and rang es may e xp and as more test results become available. For some p arameter s, no infor mation is curr ently ava ilable.

The scan tool may display names for some data parameters that differ from names displayed by a factory tool and other scan tools.

Always use a meter or lab scope, to further validate the displayed values. If da t a is corr upted on multiple parameters, do not assume that th e control module may be faulty. This corrupt data may be caused by improper communication between the scan tool and the contro l module co ntroller.

Data Parameters Alphabetical Parameter List

6.1 Alphabetical Parameter List

A/C COMP SW OFF BY ENG-ECU ...............................................................................................................................105

A/C COMPRESSOR .......................................................................................................................................................105

A/C COMPRESSOR OFF ..............................................................................................................................................105

A/C COMPRESSOR ON ................................................................................................................................................105

A/C KICKDOWN .............................................................................................................................................................140

A/C MODE ......................................................................................................................................................................105

A/C READINESS ............................................................................................................................................................105

A/C SWITCH ..................................................................................................................................................................105

A/T ..................................................................................................................................................................................140

A/T INPUT(RPM) ............................................................................................................................................................140

A/T INPUT(RPM) ............................................................................................................................................................141

A/T OUTPUT(RPM) ........................................................................................................................................................141

A/T SWITCH ...................................................................................................................................................................141

A/T(RPM) ........................................................................................................................................................................140

ACCEL.PEDAL POSITION SNS 1(%) ............................................................................................................................105

ACCEL.PEDAL POSITION SNS 2(%) ............................................................................................................................105

ACCELERATION ENRICHMENT ...................................................................................................................................105

ACCELERATOR PEDAL POSITION(%) ........................................................................................................................136

Accelerator Pedal Value .................................................................................................................................................148

ACTUAL ADAPTATION POSITION(V) ...........................................................................................................................105

Actual Engine Torque .....................................................................................................................................................148

ACTUAL SELECTED GEAR ..........................................................................................................................................140

ACTUAL SOLENOID(A) .................................................................................................................................................140

ADAPTATION ABORTED(BATTERY <8V) .....................................................................................................................105

ADAPTATION ERROR ...................................................................................................................................................105

Adaptation of start-from-stop behavior forward ..............................................................................................................148

Adaptation of start-from-stop characteristics Reverse ....................................................................................................148

ADAPTATION REQUIRED .............................................................................................................................................105

ADAPTATION RUNNING ...............................................................................................................................................105

ADAPTATION STATUS ..................................................................................................................................................106

ADP ENG SPEED SENSOR(CROWN GEAR) ..............................................................................................................106

ADP IDLING STABILIZATION(kg/h) ...............................................................................................................................106

ADP STOPPED(TIME EXCEEDED) ..............................................................................................................................106

ADP THROTTLE VALVE ADJUSTER ............................................................................................................................106

ADP VALUE AIR MASS IDLE(%) ...................................................................................................................................106

ADP VALUE CANP SYSTEM .........................................................................................................................................106

ADP VALUE CANP VALVE .............................................................................................................................................106

ADP VALUE CANP VALVE 1(%) ....................................................................................................................................106

ADP VALUE ISC .............................................................................................................................................................106

ADP VALUE MIXTURE(BANK1) ....................................................................................................................................107

ADP VALUE MIXTURE(BANK1)(%) ...............................................................................................................................106

ADP VALUE MIXTURE(BANK2) ....................................................................................................................................107

ADP VALUE MIXTURE(BANK2)(%) ...............................................................................................................................106

AIR DIVERT VALVE .......................................................................................................................................................107

AIR MASS IDLE(g/s) ......................................................................................................................................................107

ALTERNATOR DEFECT .................................................................................................................................................107

ALTERNATOR LOAD(%) ................................................................................................................................................107

ALTITUDE CORRECTION FACTOR ..............................................................................................................................107

Audi Fault Codes DTC AUDI Fault Codes DTC

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Information

Chapter 1 Using This Manual

Chapter 2 Introduction

Chapter 3 Operations

Chapter 4 Expert Mode

Chapter 5 Testing

Chapter 6 Data Parameters