Mercedes Vehicle Communication Software Manual

Mercedes-Benz

Vehicle Communication

Software Manual

February 2011

EAZ0025B41C Rev. B

Trademarks Acknowledgements

Snap-on, ETHOS, Fast-Track, MODIS, Scanner, ShopStream, SOLUS, and SOLUS PRO are tr adema rks of Snap-on Incorporated.

All other marks are trademarks of their respective holders.

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 Web site at:

http://diagnostics.snapon.com

For Technical Assistance Call:

1-800-424-7226

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 cont act with, the equipm ent. W e suggest you store a copy near the unit in sight of the operator

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 te sted with this instrum ent, we cann ot 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 perfor m test s in an appropriate and acceptable manner that does not en danger you r safety, the safety of others in the work area, the equipment being used, or the vehicle being tested.

It is assumed that the operator has a thorough understanding of vehicle systems before using this product. Understanding of these system principles and operating theories is necessary 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

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

Contents...................................................................................................................................... v

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

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

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

Symbols ................................................................................................................................. 1

Terminology ........................................................................................................................... 2

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

Procedures............................................................................................................................. 2

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

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

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

Selecting a System....................................................................................................................... 6

Connecting to a Vehicle................................................................................................................ 6

Selecting a Test.......................................................................................................................... 11

Main Menu Selections................................................................................................................ 11

Codes................................................................................................................................... 12

Data .................................................................................................................................... 12

Functional Tests... ... ... ... .... ... ... ... ....................................... ... ... .... ......................................... 13

Review ECU ID.................................................................................................................... 14

Stop Communication............................................................................................................ 14

Scanner Demonstration Program............................................... ... .... ... ... ... .... ... ... ... ... ....... ... ... ... 14

Chapter 4: Testing.................................................................................................................... 15

Testing EA/CC/ISC Systems......................................................................................................15

Note the following when testing EA/CC/ISC systems: ......................................................... 16

Testing DAS (Immobilizer) Systems........................................................................................... 16

Central Locking.................................................................................................................... 16

DAS Versions... .... ... ... ... .... ... ... ....................................... ... ... ... ....................................... ...... 17

Chapter 5: Data Parameters .................................................................................................... 22

Alphabetical Parameter List..................... ...................................... .... ... ... ................................... 23

Engine Parameters........................... ... .... ... ....................................... ... ... ... ................................ 37

Transmission Parameters........................................................................................................... 87

Appendix A: Troubleshooting and Communication Problems............................................ 99

Startup Troubleshooting............................................................................................................. 99

Communication Problems ..........................................................................................................99

Common Problems........................... ... .... ... ....................................... ... ... ... .............................. 100

Common Symptoms......................................... .... ... ... ....................................... ... ... ... .............. 100

Check Scanner Connection and Operation........................................................................ 100

Contents

Appendix B: Terms, Abbreviations and Acronyms............................... .... ... ... ... ... .... ... ... ... . 101

Terms ....................................................................................................................................... 101

Abbreviations and Acronyms.................................................................................................... 101

Index........................................................................................................................................ 109

Chapter 1 Using This Manual

This manual contains instructions for testing Mercedes-Benz vehicles. Some of the illustrations shown in this manual may contain modu les and optio nal equipment tha t are not incl uded on your system. Contact a sales representative for availability of other modules and optional equipment.

Conventions

The following conventions are used.

Bold Text

Bold emphasis is used in procedures to highlight select able items such as butto ns and menu options.

Example:

• Press the OK button.

Symbols

Different types of arrows are used. The “greater than” arrow (>) indicates an abbreviated set o f se lection instructions. Example:

• Select Utilities > T ool Setup > Date.

The example statement abbreviates the followin g procedur e:

1. Navigate to the Utilities screen.

2. Highlight the Tool Setup submenu.

3. Highlight the Date option from the submenu.

4. Press OK to confirm the selection. The solid arrows (e, c, d, b) are navigational instructions referring to the four directions of the

directional arrow keys. Example:

• Press the down d arrow.

Using This Manual Conventions

NOTE:

IMPORTANT:

Terminology

The term “select” means highlighting a button or menu item and pressin g the Accept, OK, Yes, or other similar button to confirm the selection.

Example:

• Select Reset.

The above statement abbreviates the following procedu re:

1. Navigate to and highlight the Reset selection.

2. Press the OK, or similar, button.

Notes and Important Messages

The following messages are used.

Notes

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

i For additional information refer to...

Important

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

Example:

Do not disconnect the data cable while the Scanner is communicating with the ECM.

Procedures

An arrow icon indicates a procedure. Example:

z To change screen views:

1. Select the View button. The dropdown menu displays.

2. Select an option from the menu. The screen layout changes to the format selected.

Chapter 2 Introduction

The Mercedes-Benz V ehi cle Commu nication Sof t ware provides exten sive vehicle-sp ecific engine, transmission, antilock brake system (ABS) and airbag trouble codes, and selected functional tests.

This manual is designed to guide you through control systems tests of Mercedes-Benz vehicles. The first two sections of this manual overview safety and usage conventions. The remain der of

this guide is divided into the following chapters:

• “Chapter 3 Operations” on page 4 takes you through basic Scanner operations from

identifying the vehicle to selecting tests from a Main Menu screen.

• “Chapter 4 T esting” on page 15 offers testing information and procedures for transmission

control systems.

• “Chapter 5 Data Parameters” on page 22 defines Mercedes-Benz data parameters and

explains how they display on the screen.

• “Appendix A Troubleshooting an d Communicatio n Problems” on p age 99 offers advice for

troubleshooting Scanner-to-vehicle communication and other issu es.

• “Appendix B Terms, Abbreviations and Acronyms” on page 101 lists abbreviations used in

this manual.

Chapter 3 Operations

Identifying the V ehicle

The Scanner typically identifies a vehicle using cert ain characters of the veh icle identificatio n number (VIN). The Scanner vehicle identification (ID) process prompts to you enter VIN characters and answer questions about the vehicle to be tested.

For some vehicles, the Scanner may display two or more engine choices. Be sure to scroll to confirm the number of engine choices. The engine number is stamped on the engine block or cylinder head, however , the exact locatio n varies and is often difficult to see on an installed engine. For example, the number is often behind the water pump on V8 engines.

For 129 and 140 models, there may be multiple engine selections that are seen by scrolling after selecting the year . Typically, multiple engine choices apply to other market s and only one engine is used on North American vehicles for any given year.

Table 3-1 provides some helpful tips for selecting the correct engine.

Table 3-1 VIN selections for North American vehicles (sheet 1 of 2)

VIN Engine Selection

VIN FA67

VIN FA76

VIN GA32

VIN GA43

VIN GA51

VIN GA57

VIN GA70

VIN GA76

VIN EA30 (1988–92)

VIN JF72 VIN AB54 112.942 used on 1998–2003 models

VIN AB57 112.970 used on 2003–2005 models VIN AB72 113.942 used on 1999–2001 models VIN AB74 113.981 used on 2000–2002 models VIN AB75 113.964 used on 2002–2005 models

11 9.972 used on 1995 models only

119.982 used on 1996–2000 models

120.981 used on 1995 models only

120.983 used on 1996–98 models

104.990 used on 1993 models only

104.994 used on 1994 models only 11 9.971 used on 1995 models only

119.981 used on 1996–98 models 11 9.970 used on 1995 models only

119.980 used on 1996–98 models

120.980 used on 1995 models only

120.982 not used on 1995 U.S. models 11 9.970 used on 1995 models only

119.980 used on 1996–98 models

120.980 used on 1995 models only

120.982 not used on 1995 US models

103.980 not used in US

103.983 used in US

119.980 not used in US (5.0L-V8) 1 19.985 used in US (4.2L-V8)

Operations Identifying the Vehicle

NOTE:

Table 3-1 VIN selections for North American vehicles (sheet 2 of 2)

VIN Engine Selection

VIN AJ76 155.980 used on 2005 models VIN FA68 113.961 used on 1999–2002 models VIN FA76 120.983 used on 1997–2002 models VIN KK47 111.973 used on 1998–2000 models VIN KK49 111.983 used on 2001–2004 models VIN KK65 112.947 used on 2001–2004 models VIN KK66 112.960 used on 2002–2004 models VIN PJ74 1 13.991 used on 2003 models VIN PJ75 1 13.960 used on 2000 models VIN PJ76 275.950 used on 2003–2005 models VIN RF76 113.988 used on 2005 models VIN SK74 113.992 used on 2003 models VIN SK75 113.963 used on 2003 models VIN SK76 275.960 used on 2004 models VIN SK79 275.981 used on 2005 models VIN TJ 75 113.987 used on 2003 models VIN TJ 76 113.987 used on 2004 models

VIN UF70 VIN UF76 113.990 used on 2004 models

VIN UF83 113.969 used on 2004 models VIN WK56 272.963 used on 2005 models VIN WK73 1 13.989 used on 2005 models

113.967 used on 2003 models

113.969 used on 2004 models

When multiple engine choices are listed, only the correct e ngine choi ce communicates with the Scanner. If the Scanner d oes not co mmunicate af ter selecting one engine, se lect the other engine and try again. Always scroll to verify if any additional engine choices are available.

Multiple engine systems are sometimes listed together as one selection (for example HFM/ME2) because vehicle systems may vary depending on country. The Scanner automatically identifies the correct system.

Selecting System ID mode allows the user to go to the selected system and co ntrol unit. Th e scan tool displays a list of systems or modules with which the scan tool can communica te.

i The list of systems or modules that the scan tool can communicate with is not customized to the

test vehicle.

Selecting a module that is not fitted to the vehicle will result in a “No Communication” error message. Some systems will list the same systems or modules more than once; the correct choice is the only one that will communicate with the scan tool.

z To identify a vehicle:

1. Press Y/a from the database confirmation screen. The Mode Selection menu displays.

Operations Selecting a System

2. Scroll to Vehicle Selection and press Y/a. The Select Market screen displays.

3. Highlight USA and press Y/a to select.

4. Scroll and press Y/a to select the model year.

5. Scroll and press Y/a to select the series.

6. Scroll and press Y/a to select the engine. The Scanner now displays the Vehicle ID Confirmation screen.

7. If the identification is correct, press Y/a to store the identification in memory and continue. If the identification is not completely correct, press N/X as often as needed to return to the previous screens and make corrections.

Selecting a System

Once you have confirmed a vehicle identification, the System List menu displays. This menu shows all the systems available for testing.

z Note the following when selecting a system for testing:

• The terms “left” and “right” refer to sep ara te engine bank contro l systems for 12- cylinder

engines and assume left and right from the positi on of a se ated drive r. OBD-II terminology uses Bank 1 and Bank 2. The Scanner calls Bank 1 (cylinders 1–6) on the passenger side, “(Right),” and Bank 2 (cylinders 7–12) on the driver's side, “(Left).”

• Bank 1 is controlled by ME 1 and Bank 2 is controlled by ME 2.

• For the V12 engine, long intake runners with a MAF sensor for each bank are loca ted on the

opposite side of the engine.

• For those vehicles with multiple system choices, if the Scanner is not able to establish

communication using the first system choice, try again using an alternate system choice. See “Appendix A Troubleshooting and Communication Prob lems” on p age 99 for help trying to establish communication.

z To select a syst em for t estin g:

• Scroll to the system you would like to test and press Y/a.

Connecting to a V ehicle

After selecting from the System List, the Scanner displays a co nnectio n message tha t tells you which adapter and personality key to use to connect the Scanner for testing. Each test ad apter plugs into a specific vehicle diagnostic connector and att aches to one e nd of the d at a ca ble. The other end of the cable attaches to the Scanner. Captive screws secure both data cable ends.

The following adapters are available to connect the Scann er to Mer cedes-Ben z vehicles:

• MB-1—for the 38-pin underhood connector.

• MB-2A—for the 8-pin or 16-pin underhood connector.

• DL-16—for 1996 and later vehicles with an OBD-II style conne ctor.

Operations Connecting to a Vehicle

NOTE:

When available, it is recommended to use the underhood 38-p in connector for tho se vehicles from approximately 1996–2001. For those vehicles with dual connectors, the und er-d ash 16-pin may have limited functionality.

Use the following adapter + Personality Key™ combinations for the appro priate systems.

• DL16 + S4—KLA/TAU airco system (A/SLK-series)

• MB1 + S33—KLA/TAU airco system

• MB1 + S34—ZAE airbag, EWM (electronic gear selector) system

i When a CIS-E vehicle is identified, a connector message appears instructing you to use the

“MB-2 + 2.5 mm adapter cable” which is designed to be used in conjunction with the yellow lead on the MB-2 adapter. This 2.5 mm adapter is currently not available in the Scanner accessory package (many test lead kits may have a standard banana plug for the 2.5 mm adapter). On CIS-E, a duty ratio test reads current faults via a duty-cycle output. The vehicle diagnostic connector is a round 9-pin. Connect to pin 3 as directed by the display message.

Figure 3-1 MB-1 adapter Figure 3-2 MB-2A adapter

Figure 3-3 DL-16

Each test adapter connects to one of the following vehicle di agnosti c connectors.

Operations Connecting to a Vehicle

Pin Function Pin Function

Ground, circuit 31 (W12, W15, electronics

ground) 2 Voltage, circuit 87 or 15z 3 Voltage, circuit 30 Instrument cluster

Electronic diesel syste m

Electronic distributor-type fuel injection

(diesel)

Electronic inline fuel injection (diesel) 4

HFM sequential multiport fuel injection/

ignition

LH sequential multiport fuel injection,

engines 104, 119, 120 (right)

ME sequential multiport fuel injection/

ignition, engines 119, 120 (right)

LH sequential multiport fuel injection,

engine 120 (left) 5

ME sequential multiport fuel injection/

ignition, engine 120 (left)

On-off ratio, engine 119 LH-SFI, engine 120

LH-SFI (right) On-off ratio, engine 120 LH-SFI (left)

Air conditioning (models 124, 202, 208,

210)

Tempmatic air conditioning (model 170) Distributor ignition, engines 104, 119,

engine 120 (right) TD-speed signal (time division) (diesel)

(model 140) TN-speed signal, LH-SFI engines, HFM

(model 202)

18 Distributor ignition, engine 120 (left)

19 Diagnostic module

Pneumatic system equipment (model 140)

20 Antilock brake system Combination control module (model 210) Electronic traction system

Acceleration slip regulation Roadster soft top (model 129)

Convenience feature (mode l 140)

21 Electronic stability program 22 Roll bar (model 129)

Electronic accelerator 23 Anti-theft alarm

Cruise control/idle speed control 24–25 Not used Base module 26 Automatic locking differential (model 202)

Brake assist 27 Not used Automatic locking differential (models 124,

129, 140)

28 Parktronic system (model 140)

10 Electronic transmission control 29 Not used 1 1 Adaptive damping system 30 Airbag/ETR (SRS) 12 Speed-sensitive power steering 31 Remote central locking

TNA-signal (gasoline) LH-SFI engines 32–33 Not used TD-signal (diesel) (model 210) 34 Communication and navigation system

TN-signal (gasoline), HFM (ME)-SFI engines

35–38 Not used

Figure 3-4 38-pin connector—fits MB-1 adapter

Operations Connecting to a Vehicle

US Models California Models Only (With LED)

Pin Function Pin Function

1 Ground 1 Ground 2 Not used 2 Push-button for on-board diagnostics 3 Continuous fuel injection 4 Electronic diesel system Diagnostic module

Continuous fuel injection

54MATIC 4LED 6 Airbag/ETR (SRS) 5 Automatic locking differential

Air conditioning (model 124) 6 Airbag/ETR (SRS)

Roll bar (model 129) Distributor ignition Roll bar (model 129) HFM sequential multiport fuel injection/

ignition Pressurized engine control Adaptive damping system

Roll bar (model 124) Roll bar (model 124) 10 TN-signal (gasoline) 11 Anti-theft alarm TN-signal (gasoline)

Air conditioning (model 124)

Distributor ignition

HFM sequential multiport fuel injection/ ignition

Adaptive damping system

Roadster soft top (model 129)

12 Remote central locking 11 Anti-theft alarm 13 Electronic transmission control 12 Remote central locking

Electronic accelerator (model 124) 13 Electronic transmission control

Cruise control/idle speed control 14

(model 124)

Engine systems control module (MAS)

(model 129) 15 Not used

16 Circuit 15

Electronic accelerator (model 124) Cruise control/idle speed control

(model 124) Engine systems control module (MAS)

(model 129) 15 Not used 16 Circuit 15

Figure 3-5 16-pin OBD-I connector—fits MB-2 adapter

Operations Connecting to a Vehicle

Pin Function

1 Ground 2 Not used 3 Continuous fuel injection

Diesel injection system

Electronic idle speed control Electronic diesel Automatic locking differential

Automatic-engaged 4WD (model 124 only) 6Airbag 7 Air conditioning 8 Not used

Figure 3-6 8-pin connector—fits MB-2 adapter

Pin Function Pin Function

1 Not used 9

Electronic Traction System (ETS),

model 163 2 Not used 10 Not used 3 TNA-signal (gasoline) 1 1 Electronic transmission control (ETC) 4 Circuit 31, ground 12 All Activity Module (AAM) 5 Circuit 31, electric ground 13 Airbag/ETR (SRS) 6 CAN interior bus (H) 14 CAN interior bus (L) 7 Motor electronics (ME) 15 Instrument cluster 8 Circuit 87, voltage supply 16 Circuit 30, voltage supply

Figure 3-7 16-pin OBD-II connector—fits DL-16 adapter

Operations Selecting a Test

z Note the following when connecting the Scanner to the vehicle:

• “Left” or “Right,” when included in the connection messa ge, assumes that you a re seated in

the driver seat.

• When the connection message screen refers to the MB-2 adapter, use the MB-2A adapter.

• The MB-1 and DL-16 adapters require a Personality Key™. See the on -screen connection

instructions for the vehicle you are testing for the correct Personality Ke y™.

• The Scanner displays [MORE] if a message exceeds four lines. Scroll to display the

additional lines.

z To connect to a vehicle:

• Follow the on-screen connection instructions and press Y/a.

Selecting a T est

After a vehicle has been identified, the Scanner has been connected to the appro priate vehi cle test connector , and a syste m has bee n selected, a Main Menu specific to the identified vehicle displays, and you may begin testing.

z To select a men u item:

1. Scroll so the cursor is pointing at the selection.

2. Press the Y/a button. Pressing the Y/a button with a menu item selected has one of two results:

– A submenu displays, prompting you for another selection. – A test begins.

Main Menu Selections

The Main Menu presents selections only for the specific ve hicle being te sted. The Mercedes-Benz Main Menu contains the following gen eral function s:

• Codes—displays one of three types of diagnostic trouble codes (see “Codes” on page 12).

• Data—allows the monitoring of various sensors, switches, fuel adaptation values, and

actuator inputs and outputs on ma ny Mercede s-Benz veh icles (see “Dat a” o n p age12).

• Functional Tests—provides specific tests for the identified vehicle (see “Functional Tests” on

page 13).

• Stop Commu nication—disables the a ctive comm unicat ion link between the Scanne r and the

vehicle control module.

• Review ECU ID—displays identification characteristics of the active control module.

Operations Main Menu Selections

Codes

Select Codes from the Main Menu and the Scanner displays any existing codes from the ECU “live.” This means that as the ECU sets or clears a cod e, the Scanne r shows or removes tha t code from the screen almost instantaneously.

Codes Exit Menu

Press N/X from the Codes display and an exit menu that of fe rs two choices op ens:

• Resume—returns to the codes list.

• Clear Codes—erases codes from ECU memory.

Clear Codes

This selection allows the Scanner to clear DTCs from the ECU memory.

z Note the following when clearing codes:

• For each system selected from the System List, each code type must be read and cleared

separately.

• On vehicles with V12 engines, select the right-side ECU from the System List to display

Clear Codes on the Code Exit menu.

z To clear codes:

1. Scroll to Clear Codes and press Y/a. The Scanner displays messages guiding you through the code clearing process.

2. Press Y/a again, and the Scanner displays a confirmation screen.

3. Press Y/a again and the Scanner erases codes memory. Once codes are cleared, the Scanner returns to the Main Menu.

Data

Select Data from the Main Menu and the Scann er displa ys a menu of da t a grou p s. Each dat a group includes only parameters that relate to that particular function. The number of groups available, The type of data available, and the order in which the groups are listed varies by model. A typical data group listing would include:

• Oil Information

• Adaptation Values

• Speed Regulation

• Fan St atus

• Star t Enable

• V alues at Idle

• Air Conditioner Values

• Lambda Pairs

Operations Main Menu Selections

• Lambda Control Downstream

• Lambda Control Upstream

• Engine Running Values

• Air Pump V alues

• Knock Values

• Injection/Ignition

• Sp ark Curr ent 1—8

• Fault Counter

• Cruise Control

• Running Temperature

Combining data into groups resu lts in a much shor ter data list an d allows for a faster update rate. To select, highlight the desired group and press Y/a.

Functional Tests

Selecting FUnctional Tests from the Main Menu displays a menu that varies depending on the vehicle identified.

Each selection from the Functional Tests menu allows you to activate and test various components and systems of the engine manag ement system.

Actuator Tests

Actuator tests command the ECU to activate component s and systems, such as injectors, the throttle valve, adaptive strategy, or the fuel pump. The Scanner displays only those tests available to the identified vehicle and system (ECU).

For many components, you can conduct an auditor y te st—a re lay clicks or a pump vibrates. Be aware that actuators can be mounted anywhere in the vehicle, su ch as under the dashboar d, hood, or trunk.

If you hear no reaction where one is expected, test the actuator circuit with a digital multimeter or a digital graphing meter such as the Vantage PRO™ Meter. Use these instruments to confirm whether the ECU properly controls the component.

Special Functions

This selection opens a menu of unique tests, such as relearn procedures. Follow the on-screen instructions to check status and reprogram learne d values.

Review Coding

This test displays the programmed VIN number and other re levant info rmation.

Operations Scanner Demonstration Program

Review ECU ID

This test displays ECU identification information. Highlight Review ECU ID and press Y/a to access the information. The display may take more than one screen, scroll to read the complete test results.

Stop Communication

This selection severs the communication link between the Scanner and the vehicle ECU. Use it to end a test session before switching the Scanner off o r disconnecting th e dat a cab le.

Scanner Demonstration Program

The Mercedes-Benz software contains programs that demonstrate test capabilities without connecting to a vehicle. The demonstration program can help you become familiar with Scanner menus and operation by providing mock data a nd test results for a sampl e vehicle ID. The demonstration program is accessed at the vehicle identification ph ase of Scanner operations.

z To access a demonstr at ion:

1. Open the Mercedes-Benz database.

2. Scroll to highlight Training Mode and press Y/a to select. A series of vehicle identification screens display.

3. Scroll and press Y/a to select a vehicle identification When the System Selection menu, you are in demonstration mode.

Chapter 4 Testing

This chapter provides limited information and pro cedures for th e followin g control systems:

• Engine (gas) – CIS-E – LH – HFM – ME versions 1.0, 2.0, 2.1, 2.7, 2.7.1, 2.8 – SIM4 & SIM4/LSE – PEC – MSM – MME – ME – DI

• Engine (diesel) – Anti-Jerk Control, Idle Speed Control (AJC/ISC, ELR) – Electronic Diesel System (EDS) – IFI/DFI/DSV – CDI

• Transmission (EAG, EGS, EGS5.2, KGS)

• Transfer Case (VG, VGS)

• Electronic Shift Control Module (EWM203, EWM210, EWM220)

• Airbag (ZAE, AB2, ARMIN, T AU)

• Climate Control (KLA, TAU)

• Diagnostic Module (DM)

• Distributor Ignition (DI, EZ)

• Electronic Actuator/Cruise Control/Idle S peed Control (EA/CC/ISC, ETL)

• Base Module (GM)

• Brake Systems (ABS, BAS, EHB)

See “Main Menu Selections” on page 1 1 for general Scan ner testing in forma tion.

T esting EA/CC/ISC Systems

LH and HFM fuel management systems have a separate module tha t controls the electro nic actuator, cruise contr ol, and idle speed control (EA/CC/ISC). The ME control module on 1996 and later vehicles integrated all operations into the ME contro l system.

The exact Electronic Actuator (EA), Cruise Control (CC), and Idle Speed Control (ISC) module variations (i.e., EA/CC/ISC, CC/ISC, and ISC) are dependent on installed options like cruise

Testing Testing DAS (Immobilizer) Systems

NOTE:

control and traction control (ASR). Vehicles with ASR usually have an orange warning light on the instrument cluster .

Table 4-1 1992–96 Mercedes EA/CC/ISC application coverage

Series Model Year Chassis # Engine #

300CE 1993–95 124.052/092 104.992

124

140

202 C280 1994–95 202.028 104.941

300E 400E 1992–95 124.034 119.975

500E 1992–94 124.036 119.974 300SE 1992–93 140.032 104.990 400SE 1992 140.042 400SEL 1993–95 140.043 600SEC 1993–95 140.076 600SEL 1992 140.057 S320 1994–96 140.032 104.994

1993 124.028 104.942 1993–95 124.032 104.992

119.971

120.980

Note the following when testing EA/CC/ISC systems:

• The EA/CC/ISC modules are on the CAN bus and can turn the Check Eng ine Light o n.

Always check, repair and clear any EA/CC/ISC codes.

• The ECU or other modules may also report a code pointing to a fault at the EA/CC/ISC.

T esting DAS (Immobilizer) Systems

The Drive Authorization System (DAS) is the name for the Mercedes Immobilizer system combining vehicle access and drive authorization. Prior to 1996, DAS was separated from the engine control module, and ignition switch operation was based solely on a mechanical key. An early version of DAS was first introduced in approximately 1993 when Merce des st arted networking DAS, the engine, transmission, ABS, and traction control systems on a common data bus called CAN.

The Mercedes pneumatic control door lock system has been in existe nce since the early 19 80s, and although now it is much more advanced, it is still in use today. It steadily became more sophisticated as features were added like central locking, starter lock-out, and steering lock-out.

i Some late models, such as ML- and C-class series, have completely eliminated the pneumatic

control system and now use a fully electronic door lock system.

Central Locking

Central Locking is the ability to lock or unlock the complete vehicle at one time and from multiple locations using either an infrared beam or a radio freq uency sign al. The infrare d remote co ntrol

Testing Testing DAS (Immobilizer) Systems

NOTE:

(IFZ) was introduced in late 1992 as a standard fe ature. With central lockin g, lock actuators are no longer connected electrically, therefore the central locking, anti-theft, and convenience systems can no longer be operated with the mechanical key. Instead, a remote control module operates the complete vehicle locking system through the pneumatic contro l module. Th is keyless entry system consists of a remote control module, transmitter, pneumatic control module, and two receivers.

The infrared remote control can only be operated with a vehicle- specific tr ansmitter as they ar e matched to one another. The remote control transmitter signal consists of a fixed code that must match the receiver . The co de is “rolling,” which means it is changed each time it is actuated.

i The mechanical key can still be used in emergency to open the driver's door or trunk. All door

locks are equipped with micro switches which should disable the anti-theft alarm (ATA) if the correct key is used to unlock the door. If the ATA does not disarm, insert the key into the ignition and turn the ignition switch to the ON position.

DAS V ersions

In approximately 1991, the ATA system added the K38 relay which controlled st arter motor operation. In approximately 1993, this function was added to the RCL control module, introducing the immobilizer system which added additional RCL control functions: interruption of ignition, fuel, starter or vacuum. The import ant difference is that the RCL control module communicates on a CAN bus to other control mo dules.

i If the vehicle is unlocked with the mechanical key, the ignition switch may not operate to start the

vehicle. The vehicle may need to be unlocked using the remote key to unlock the immobilizer, which then permits the engine to start.

DAS 2

DAS 2 integrated the immobilizer function and engine control into one system. Activation and deactivation occurs whenever the car is locked or unlocked e ither with the remote transmitter or the mechanical key .

This system introduced the rolling code for the remote control on the C, E and S/SL class in

1996. Rolling code changes the access code each time the transmitter ( in the re mote key) and receiver (in the vehicle) communicate. Once the receiver authorizes the received code, it sends a new code back to the remote key .

The engine and DAS control modules are locked together with a common id entification code that cannot be erased. Engine and DAS control modules ha ve to be ve rsion code d if replaced.

Table 4-2 DAS 2 characteristics

Triggered By Signal Type

Remote or door and trunk switches

Remote locking IR or door and trunk switches

Authorization

Checked By

RCL N-54 Mirror LEDs

Operator

Feedback

Authorized

Start Result

NO fuel injection

Testing Testing DAS (Immobilizer) Systems

NOTE:

i On some models, the green and red LEDs on the rear view mirror flash alternately if the engine

will not start because DAS is activated.

DAS 2a

DAS 2a was used from January to June in 1996 on the E420. Activa tion a nd deactivation no longer occur automatically when locking or unlocking the car. Previously, if the vehicle was unlocked, DAS allowed the vehicle to start. The change with this system is that the locked or unlocked condition of the vehicle no longer affects the ability of the engine to start. In other words, the RCL and DAS functions are now separate d.

DAS 2a introduced the transponder, which adds another level of security to the ignition switch. For the key to work in the ignition, radio wave tr ansmission from an in -dash transmitter i s sent to the transponder in the key, which is then sent from the key to DAS for evaluation. If DAS accepts the code, then the ignition switch operates to start the vehicle.

The transponder system automatically changes the codes each time the key is p laced in the ignition. Each key has a uniquely-coded chip assigned to the mated DAS control mod ule. The vehicle originally came with 2 remote keys and one valet key.

Table 4-3 DAS 2a characteristics

Triggered By Signal Type

Transponder in key

Inductively coupled RF

Authorization

Checked By

RCL N-54 Mirror LEDs

Operator

Feedback

Authorized

Start Result

NO fuel injection

i DAS 2a can be identified by the presence of a transponder ring around the ignition lock and the

absence of exterior IR receivers.

DAS X

DAS X was installed on all 1997 vehicles starting in June 1996 . This system use s two sep arate control units, one for DAS and one for the Remo te Central Lockin g (RCL). It uses a key transponder like the DAS 2a system and has similar functionality. This system also added exterior RCL IR receivers.

Table 4-4 DAS X characteristics

Triggered By Signal Type

Transponder in key

Inductively coupled RF

Authorization

Checked By

DAS N54/1

Operator

Feedback

Mirror LEDs on 202/210

Authorized

Start Result

NO fuel injection; 202 no crank

Testing Testing DAS (Immobilizer) Systems

DAS 2b

DAS 2b (170/129/140) was introduced in 1998. This system uses a three-button r emote with both infrared and radio wave transmissions. The vehicle is locked or unlocked when either the infrared or radio transmits an uninterr upted signal. The thre e remote ke y buttons are for :

• Locking doors

• Unlocking doors

• Unlocking the trunk

Note the following regarding DAS 2b systems:

DAS 2b also added convenience closing and summer opening of wind ows and sunr oof

•

(uses infrared signal only).

• DAS 2b also permits global locking/unlocking (doors, trunk lid, and fuel filler flap) or selective

unlocking (driver's door and fuel door only).

• When the vehicle is locked using the remote control, the hazard lights flash 3 times and

when unlocked, they flash once.

• For both DAS 2a and DAS 2b, new replacement keys do not require any speci al learning

procedure to start the engine—the emergency mechanical key also contains th e transponder to operate the ignition switch.

• For 1998 ML 163 series, key synchronization activation re quires a scan tool procedure which

the Scanner currently does not perform.

Table 4-5 DAS 2b characteristics

Triggered By Signal Type

Transponder in key

Inductively coupled RF

Authorization

Checked By

RFL N54/3 None

Operator

Feedback

Authorized

Start Result

NO fuel injection; may crank briefly

z To synchronize the remote :

1. Turn the ignition ON.

2. Turn the ignition OFF.

3. Remove the key from the ignition.

4. Press the remote button. The remote should now lock and unlock the vehicle.

DAS 3

DAS 3 is the most sophisticated and advanced generation of DAS. DAS 3 was introduced on the C, E and CLK class in 1997 and the S class in 1998 (210/208 /202), incre asing each year with more models phased in.

This system has all the same features of DAS 2b except that the ignition switch is now fully electronic (the mechanical key is used only for vehicle access). This means that with DAS 3, both access and drive authorization are fully electronic.

Access authorization using the remote key uses both infrared and ra dio transmission, b ut the electronic key drive authorization only uses infrared. The electronic key tra nsfers a radi o wave code to the electronic ignition and starter switch (EIS).

Testing Testing DAS (Immobilizer) Systems

Table 4-6 DAS 3 characteristics

Triggered By Signal Type

Microprocessor in key

IR Infrared EIS N73 None

Authorization

Checked By

Operator

Feedback

Authorized

Start Result

NO fuel injection; NO ignition switch; NO steering lock release

Note the following when working on DAS 3 systems:

The electronic key is completely separate from the r emote key acce ss system and do es not

•

require the transmitter battery of the remote control. Instead, it is powered by the EIS, which means that the electronic key can be used to start the vehicle even if the remote control battery is dead.

• The side of the electronic key also cont ains a slide out em ergen cy mechan ical key wh ich

allows access to the vehicle if the remote battery is dead. It also ca n be used to lock th e glove compartment and the trunk.

• The engine control unit (ECU), electronic shift control module (ESM or EWM) and the

electronic ignition control module (EIS) are all locked together p ermanently.

Workshop Key (Green Key)

A special one-time key from the factory may be necessary under the follo wing conditions:

• when cancelling the disablement of a key track

• after replacing an ECU that is security-related

• after replacing an EIS

For Mercedes Dealers only, a workshop key and EIS are ordered from the factory. The workshop key and EIS must be ordered together . Af ter inst allation, the workshop key is then inserted into the EIS for final programming. Once this procedure is finished, the workshop key is returned to the factory.

Electronic Steering Lock is optionally availa ble with DAS 3. The steer ing column is lo cked and unlocked by means of an electric motor. The control unit of the electric steering lock is directly connected to the electronic ignition (EIS) by the CAN bus, which automatically locks the steering lock when the key is removed and unlocks when the key is inserted. The sam e setup may be used on an electronic selector lever on some models.

Keyless Go (Optional)

The optional Keyless Go replaces the DAS 3 electronic key. The first generation Keyless Go used a chip card carried by the driver which is used to lock or unlock, start and re-lock the vehicle. The engine is started by pressing a st ar t/stop button on the gear selector lever. A button on the chip card can be pressed to check whether the vehicle is locked o r unlocked. It can a lso can be programmed for selective or global locking. The system uses seven fram e antenn as in the doors and in the rear of the vehicle to determine the po sition of the Keyless Go chip to kn ow where to unlock or lock. The antennas are also used to know if the chip card is internal or external of the vehicle. This system uses special door handles with pull/push contacts and

Testing Testing DAS (Immobilizer) Systems

capacitive sensors. The 2nd generation Keyless Go n o longer uses a separ ate chip card bu t has the Keyless Go chip card integrated into the remote key housing.

Note the following with the Keyless Go:

• Some Keyless Go vehicles may not have any emergency key door access. In the case of a

dead battery, the emergency key can be used to open trunk to access battery, which can then be charged. The remote key is then used to open the doors.

All DAS Versions

Note the following when testing DAS systems:

• DAS or RCL module replacement means that all of the remote transmitters and tran sponder

keys must be synchronized and version-coded using the factory scan tool.

• The ME control module and either the EIS (DAS 3) or DAS control module are e lectron ically

permanently married to each other after 40 e ngine starts. There is no factory procedure to undo this. This means that a used engine, EIS or DAS control unit cannot be used on another vehicle. A new control unit can be installe d for te sting provide d the 40 engin e st art s are not exceeded. Note that the new control unit must be variant coded b efore it can b e used. Technicians have reported successfully resetting the counter to 0 on a test ECU at about count 20 by removing the version coding and ECU power for 10 to 30 minute s.

Chapter 5 Data Parameters

When DA TA is selected, the Scanner displays all of the operating parameters available from the electronic control unit (ECU) of the vehicle. The ECU provides two basic kinds of parameters: digital (or discrete) and analog:

• Digital (discrete) parameters are those tha t 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 dat a list.

• Analog parameters are displayed as a mea sured value in the appro priate units. Volt age,

pressure, temperature, time, and speed parame ters ar e examples o f analog valu es. The Scanner displays them as numbers that vary through a range of values in units, such a s pounds per square inch (psi), kilop asca l (kPa), degr ees Ce lsius (°C) , degr ees Fahr enheit (°F), kilometers per hour (KPH), or miles per hour (MPH).

The Scanner displays some data parame ters in num bers th at range from 0 to 100, 0 to 255 , or 0 to 1800. These ranges are used because in each case, it is the ma ximum number r ange that the ECU transmits for a given parame ter. However, many parameter readings never r each th e highest possible number. For example, you never see a vehicle speed r eading of 255 MPH.

For Mercedes-Benz vehicles, the maximum range of a parameter often varies by year, mod el, and engine. On these applications, the word “variable” ap pears in the ra nge he ading. However, typical sampled values observed under actual test conditions are in the p arameter descrip tion when available.

Parameters may also be identified as input signals or output commands.

• Input or feedback parameters are signals from various sen sors and switch es to th e ECU.

They may be displayed as analog or discrete values, depending upon the input device.

• Output parameters are commands that the ECU tran smit s to va rious actuator s, such as

solenoids and fuel injectors. They are displayed as discrete (ON/OFF parameters, analog values or as a pulse-width modulated (PWM) sign al.

In the following section, parameters are presen te d as they a ppear on th e Scanner scr een. M ost 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 Scanner, ar e listed in alph abetica l order be fore the descr iption.

To find the description of a parameter, locate it in the a lphabe tical index, the n go to the indicated page. Parameters are listed in the index as they appear on the Scann er 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 Mercedes-B enz, then expanded through research and field-testing. Parameter definitions and r anges may expand as more test results become available. For some parameters, no information is currently available.

The Scanner may display names for some data p arameter s that dif fe r from names disp layed by the Mercedes-Benz factory tool and other scan tools.

Data Parameters Alphabetical Parameter List

Alphabetical Parameter List

Numerics

3RD GEAR DOWN......................................................................................................................................................... 87

3RD GEAR UP............................................................................................................................................................... 87

4TH GEAR DOWN ......................................................................................................................................................... 87

4TH GEAR UP................................................................................................................................................................ 87

5TH GEAR DOWN ......................................................................................................................................................... 87

5TH GEAR UP................................................................................................................................................................ 87

5TH GEAR...................................................................................................................................................................... 87

A/C COMPRESSOR....................................................................................................................................................... 37

ABS. INT. MANIF. PRESS. DI1 ...................................................................................................................................... 37

ABS. INT. MANIF. PRESS. DI2 ...................................................................................................................................... 37

ABS. INTAKE MANIFOLD PRESSURE......................................................................................................................... 37

ACCEL. PEDAL POSITION SENSOR ........................................................................................................................... 37

ACCELERATION ENRICHMENT................................................................................................................................... 37

ACCELERATION SENSOR............................................................................................................................................ 37

ACCELERATOR PEDAL DELAY(%).............................................................................................................................. 87

ACCELERATOR PEDAL(%)........................................................................................................................................... 87

ACTUAL EGR LIFTING SENDER.................................................................................................................................. 37

ACTUAL GEAR.............................................................................................................................................................. 87

ACTUAL INJECT.QTY. PER STROKE........................................................................................................................... 37

ACTUAL INTAKE AIR PRESSURE................................................................................................................................ 37

ACTUAL PRESSURE DISTRIB.PIPE ............................................................................................................................ 38

ACTUAL SLIDE VALVE ACTUATOR ............................................................................................................................. 38

ACTUAL VALUE POT.METER VOLTAGE...................................................................................................................... 38

ACTUATOR ACT.VALUE POT.METER R1..................................................................................................................... 38

ACTUATOR ACT.VALUE POT.METER R2..................................................................................................................... 38

ACTUATOR OUTPUT VALUE........................................................................................................................................ 38

ACTUATOR SIGNAL 1................................................................................................................................................... 38

ACTUATOR SIGNAL 2................................................................................................................................................... 38

ADAPT. RANGE 2 GEAR, 6000-3000............................................................................................................................ 39

ADAPT. RANGE 2 GEAR, 6000-4000............................................................................................................................ 39

ADAPT. RANGE 4 GEAR, 2500-1500............................................................................................................................ 39

ADAPTATION TORQUE (Nm)........................................................................................................................................ 87

ADAPTATION TORQUE DEVIATION (Nm).................................................................................................................... 87

ADAPTED RANGES L1 ................................................................................................................................................. 39

ADAPTED RANGES L2 ................................................................................................................................................. 39

ADAPTED RANGES L3 ................................................................................................................................................. 39

ADJUST. CAMSHAFT TIMING SOLENOID................................................................................................................... 39

ADR ACTIVE................................................................................. ................................................................................. 39

ADR RPM ADJUSTMENT.............................................................................................................................................. 39

AFTER-START ENRICHMENT ...................................................................................................................................... 39

AIR CONDITIONING...................................................................................................................................................... 39

AIR FLAP SWITCHOVER ANGLE................................................................................................................................. 39

AIR FLAP........................................................................................................................................................................ 39

AIR LOGIC CHAIN......................................................................................................................................................... 40

AIR MASS ...................................................................................................................................................................... 40

AIR PUMP ACTIVATION ................................................................................................................................................ 40

AIR PUMP SWITCHOVER VALVE................................................................................................................................. 40

Data Parameters Alphabetical Parameter List

AIR PUMP SWITCHOVER VALVE, LEFT...................................................................................................................... 40

AIR PUMP SWITCHOVER VALVE, RIGHT.................................................................................................................... 40

AIR PUMP...................................................................................................................................................................... 40

ALTITUDE FA CTOR (%) ................................................................................................................................................ 88

ALTITUDE PRESSURE.................................................................................................................................................. 41

AMBIENT PRESSURE................................................................................................................................................... 41

ASR INTERVENTION .................................................................................................................................................... 41

BAROMETRIC PRESSURE........................................................................................................................................... 41

BASIC INJECTION DURATION..................................................................................................................................... 41

BATTERY VOLTAGE...................................................................................................................................................... 41

BOOST PRESSURE CONTROL.................................................................................................................................... 41

BOOST PRESSURE...................................................................................................................................................... 41

BRAKE LAMP SWITCH VIA CAN.................................................................................................................................. 41

BRAKE SWITCH............................................................................................................................................................ 42

CAMSHAFT ADJUSTMENT VALVE, LEFT.................................................................................................................... 42

CAMSHAFT ADJUSTMENT VALVE, RIGHT ................................................................................................................. 42

CAMSHAFT ADJUSTMENT........................................................................................................................................... 42

CAMSHAFT CONTROL LOGIC CHAIN......................................................................................................................... 42

CAMSHAFT CONTROL................................................................................................................................................. 42

CAMSHAFT HALL-EFFECT SENSOR .......................................................................................................................... 42

CAMSHAFT REFERENCE MARK SIGNAL................................................................................................................... 42

CAMSHAFT SIGNAL, LEFT BANK..... ........................................................................................................................... 43

CAMSHAFT SIGNAL, RIGHT BANK.............................................................................................................................. 43

CAMSHAFT SOLENOID................................................................................................................................................ 42

CAMSHAFT SOLENOID................................................................................................................................................ 43

CAMSHAFT TIMING...................................................................................................................................................... 42

CAN DATA EXCHANGE..................................................................................... ............................................................ 43

CAN RECEPTION FROM ASR................................ ...................................................................................................... 43

CAN RECEPTION FROM DAS...................................................................................................................................... 43

CAN RECEPTION FROM DI1........................................................................................................................................ 43

CAN RECEPTION FROM DI2........................................................................................................................................ 43

CAN RECEPTION FROM EA,CC,ISC ........................................................................................................................... 43

CAN RECEPTION FROM LH1-SFI................................................................................................................................ 44

CAN RECEPTION FROM LH2-SFI................................................................................................................................ 44

CAN TRANSMISSION FROM DI1 ................................................................................................................................. 44

CAN TRANSMISSION FROM DI2 ................................................................................................................................. 44

CAN TRANSMISSION FROM LH1-SFI.......................................................................................................................... 44

CAN TRANSMISSION FROM LH2-SFI.......................................................................................................................... 44

CANISTER PURGE DUTY CYCLE................................................................................................................................ 44

CANISTER PURGE VALVE DUTY CYCLE.................................................................................................................... 44

CATALYST SELECTED.................................................................................................................................................. 44

CATALYTIC CONVERTER HEATER.............................................................................................................................. 44

CHARCOAL CANISTER ................................................................................................................................................ 44

CHECK ENGINE AFTER FULFILLING FAULT SEQUENCE......................................................................................... 45

CIRCUIT 15.................................................................................................................................................................... 45

CIRCUIT 50 INPUT ........................................................................................................................................................ 45

CIRCUIT 50 OUTPUT .................................................................................................................................................... 45

CIRCUIT 50.................................................................................................................................................................... 45

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