Equus 3140 User Manual

E

The Easiest
And Best Way
To Troubleshoot
OBD2 and OBD1
Vehicles!

Table of Contents

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Title Page No.

INTRODUCTION

What is OBD? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

YOU CAN DO IT! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

SAFETY PRECAUTIONS

Safety First! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

ABOUT THE CANOBD2&1 SCAN TOOL

Battery Installation / Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Adjustments/Settings and DTC Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CANOBD2&1 SCAN TOOL CONTROLS

Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Display Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Viewing DTC’s in the CanOBD2&1 Scan Tool’s Memory . . . . . . . . . . . . . . . . . . . . . . 14

Preliminary Vehicle Diagnosis Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

PREPARATION FOR TESTING

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Vehicle Service Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

GENERAL CODE RETRIEVAL PROCEDURES

OBD1 Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

OBD2 Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

OBD2 Systems

Vehicles Covered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Diagnostic Trouble Codes (DTCs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Code Retrieval Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Erasing Diagnostic Trouble Codes (DTC’s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

I/M Readiness Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

OBD2 Live Data Mode

Viewing Live Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Customizing Live Data (PIDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Recording (Capturing) Live Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Live Data Playback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Generic (Global) OBD2 PID List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Additional OBD2 Tests

O2 Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Non-Continuous Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

System Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Vehicle ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Chrysler/Jeep OBD1 Systems

Chrysler/Jeep OBD1 Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Vehicles Covered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Instrument Panel Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Data Link Connector (DLC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Code Retrieval Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Ford OBD1 Systems

Ford Computer System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Vehicles Covered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Test Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Connecting the CanOBD2&1 Scan Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Diagnostic Trouble Codes (DTCs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Code Retrieval Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Additional Tests for EEC-IV Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

GM OBD1 Systems

Your Vehicle’s Computer System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Vehicles Covered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

About the CanOBD2&1 Scan Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Data Link Connector (DLC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Malfunction Indicator Light (MIL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Diagnostic Trouble Codes (DTCs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Code Retrieval Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Toyota/Lexus OBD1 Systems

On-Board Vehicle Diagnostics (OBD1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Vehicles Covered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Data Link Connector (DLC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Instrument Panel Malfunction Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Diagnostic Trouble Codes (DTCs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Code Retrieval Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Servicing DTCs

Servicing DTCs - OBD I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Erasing DTCs (OBD I Systems) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Glossary

Glossary of Terms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Warranty and Servicing

Limited One Year Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Service Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Introduction

WHAT IS OBD?

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WHAT IS OBD?

The CanOBD2&1 Scan Tool is designed to work on most

Chrysler, Ford, GM and Toyota OBD1 systems and all

OBD2 compliant vehicles.

One of the most exciting improvements
in the automobile industry was the addition
of on-board diagnostics (OBD) on vehicles,
or in more basic terms, the computer that
activates the vehicle’s “CHECK ENGINE”
light. OBD 1 was designed to monitor manu­facturer-specific systems on vehicles built
from 1981 to 1995.Then came the develop­ment of OBD 2, which is on all

1996 cars and light trucks sold in the
United States. These systems are part of a government mandate to
lower vehicle emissions. The sophisticated programs in the vehicle’s
on-board computer system are designed to detect failures in a range
of vehicle systems.Diagnostic information can be accessed through a
Data Link Connector test port specifically designed for this purpose.
For all OBD systems, if a problem is found, the computer turns on the
“CHECK ENGINE” light to warn the driver, and sets a Diagnostic
Trouble Code (DTC) to identify where the problem occurred.A special
diagnostic tool, such as the CanOBD2&1 Scan Tool, is required to
retrieve these codes, which consumers and professionals use as a
starting point for repairs.

You Can Do It!

EASY TO USE - EASY TO VIEW - EASY TO DEFINE

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Easy T o Use ....

■ Connect the CanOBD2&1 Scan Tool

to the vehicle’s test connector.

■ Turn the ignition key "On.”

■ Press the POWER/LINK button.

Easy T o View ....

■ The CanOBD2&1 Scan Tool retrieves

stored codes, as well as Freeze Frame
data and I/M Readiness status (OBD2
systems only).

■ Codes, I/M Readiness status and

Freeze Frame data are displayed on the
CanOBD2&1 Scan Tool’s display
screen. System status is indicated by
LED indicators.

Easy T o Define ....

■ Read code definitions from the

CanOBD2&1 Scan Tool’s display.

■ View Freeze Frame data (OBD2 sys-

tems only).

■ View, record and playback live data

(OBD2 systems only).

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Safety Precautions

SAFETY FIRST!

SAFETY FIRST!

This manual describes common test procedures used by
experienced service technicians. Many test procedures
require precautions to avoid accidents that can result in
personal injury, and/or damage to your vehicle or test
equipment.Always read your vehicle's service manual and f ol­low its safety precautions before and during any test or serv­ice procedure. ALWAYS observe the following general safety
precautions:

When an engine is running, it produces carbon monox­ide, a toxic and poisonous gas.To pre vent serious injury
or death from carbon monoxide poisoning, operate the
vehicle ONLY in a well-ventilated area.

To protect your eyes from propelled objects as well as
hot or caustic liquids, always wear approved safety
eye protection.

When an engine is running, many parts (such as the
coolant fan, pulleys, fan belt etc.) turn at high speed.To
avoid serious injury, always be aware of moving parts.
Keep a safe distance from these parts as well as other
potentially moving objects.

Engine parts become very hot when the engine is run­ning. To prevent severe burns, avoid contact with hot
engine parts.

Before starting an engine for testing or trouble-shoot­ing, make sure the parking brake is engaged. Put the
transmission in park (for automatic transmission) or
neutral (for manual transmission). Block the drive
wheels with suitable blocks.

Connecting or disconnecting test equipment when the
ignition is ON can damage test equipment and the vehi­cle's electronic components. Turn the ignition OFF
before connecting the CanOBD2&1 Scan Tool to or dis­connecting the CanOBD2&1 Scan Tool from the vehi­cle’s Data Link Connector (DLC).

To avoid personal injury, instrument damage and/or

damage to your vehicle; do not use the CanOBD2&1 Scan

Tool before reading this manual.

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Safety Precautions

SAFETY FIRST!

To prevent damage to the on-board computer when tak­ing vehicle electrical measurements, always use a digi­tal multimeter with at least 10 megOhms of impedance.

Fuel and battery vapors are highly flammable. To pre­vent an explosion, keep all sparks, heated items and
open flames away from the battery and fuel / fuel
vapors. DO NOT SMOKE NEAR THE VEHICLE DUR­ING TESTING.

Don't wear loose clothing or jewelry when working on an
engine. Loose clothing can become caught in the fan,
pulleys, belts, etc.Jewelry is highly conductive, and can
cause a severe burn if it makes contact between a
power source and ground.

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About the CanOBD2&1 Scan Tool

BATTERY INSTALL / REPLA CEMENT / ADJUSTMENTS/SETTINGS & DTC LIBRARY

BATTERY INSTALLATION / REPLACEMENT

Replace batteries when the battery symbol is visible on display
and/or the 3 LEDS are all lit and no other data is visible on screen.

1. Locate the battery cover on the back of the CanOBD2&1 Scan Tool.

2. Slide the battery cover off (use your fingers).

3. Replace batteries with three AA-size batteries (for longer life, use

Alkaline-type batteries).

4. Reinstall the battery cover on the back of the CanOBD2&1 Scan Tool.

Language Selection After Battery Installation

The first time the unit is turned on, you
must select the desired display language
(English, French or Spanish) as follows:

1. Press and hold the POWER/LINK

button for approximately 3 seconds to
turn the CanOBD2&1 Scan Tool “ON.”

■ The Select Language screen displays.

2. Use the UP and DOWN buttons, as necessary, to highlight

the desired display language.

3.

When the desired display language is selected, press the
ENTER/LD button to confirm your selection.

After the initial language selection is performed, it, as well as
other settings, can be changed as desired. Proceed to
“ADJUSTMENTS/SETTINGS AND DTC LIBRARY”below for
further instructions.

ADJUSTMENTS/SETTINGS AND DTC LIBRARY

The CanOBD2&1 Scan Tool lets you make several adjustments and
settings to configure the tool to your particular needs. It also contains
an OBD2 DTC Library that allows you to search for DTC definitions.
The following functions, adjustments and settings can be performed
when the CanOBD2&1 Scan Tool is in “MENU Mode”:

■ Adjust Brightness: Adjusts the brightness of the display screen.

■ Display Backlight: Turns the display backlight on and off.

■ DTC Library: Lets you search the library of OBD2 DTC definitions.

■ Select Language: Sets the display language for the CanOBD2&1

Scan Tool to English, French or Spanish.

■ Unit of Measurement: Sets the Unit of Measure for the

CanOBD2&1 Scan Tool’s display to USA or metric.

■ Menu Exit: Exits “MENU Mode”.

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About the CanOBD2&1 Scan Tool

ADJUSTMENTS/SETTINGS AND DTC LIBRARY

Adjustments and settings can be made only when the
CanOBD2&1 Scan Tool is NOT connected to a vehicle.

To enter the MENU Mode:

1. With the CanOBD2&1 Scan Tool OFF,

press and hold the UP button, then
press and release the POWER/LINK

button.

■ The Setup Menu displays.

2. Release the UP button.

DO NOT release the UP button until the Setup Menu is
visible on the display.

3. Make adjustments and settings as described in the following para-

graphs.

Adjusting Display Brightness

1. Use the UP and DOWN but-

tons, as necessary, to highlight Adjust
Brightness in the Setup Menu, then
press the ENTER/LD button.

■ The Adjust Brightness screen dis-

plays.

■ The Brightness field shows the cur-

rent brightness setting, from 0 to 43.

2. Press the UP button to decrease

the brightness of the display (make the
display darker).

3. Press the DOWN b utton to increase

the brightness of the display (make the
display lighter).

4. When the desired brightness is obtained, press the ENTER/LD

button to save your changes and return to the Setup Menu.

Using the Backlight

1. Use the UP and DOWN but-

tons, as necessary, to highlight Display
Backlight in the Setup Menu, then
press the ENTER/LD button.

■ The Display Backlight screen displays.

2. Press the UP or DOWN button,

as necessary, to select the desired
backlight mode, either ON or OFF.

CanOBD2&1 7

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About the CanOBD2&1 Scan Tool

ADJUSTMENTS/SETTINGS AND DTC LIBRARY

3. When the desired backlight mode is

selected, press the ENTER/LD
button to save your changes.

■ The display returns to the MENU, and

the backlight turns “on” or “off” as
selected.

Searching for a DTC Definition Using the DTC Library (applicable
to OBD2 systems only)

1. Use the UP and DOWN but-

tons, as necessary, to highlight DTC
Library in the Setup Menu, then press
the ENTER/LD button.

■ The Enter DTC screen displays. The

screen shows the code “P0001”, with
the “P” flashing.

2. Use the UP and DO WN buttons,

as necessary, to scroll to the desired
DTC type (P=Powertrain, U=Network,
B=Body, C=Chassis), then press the
DTC SCROLL button.

■ The selected character displays “solid”,

and the next character begins flashing.

3. Select the remaining characters in the DTC in the same way, press-

ing the DTC SCROLL button to confirm each character.When
you have selected all the DTC characters, press the ENTER/LD

button to view the DTC definition.

■ If you entered a “Generic” DTC

(DTCs that start with “P0”, “P2” and
some “P3”):

- The selected DTC and DTC defi­nition (if available), show on the
CanOBD2&1 Scan Tool’s display.

If a definition for the DTC you entered is not av ailable , an advi­sory message shows on the CanOBD2&1 Scan Tool’s display.

■ If you entered a “Manufacturer-Specific” DTC (DTCs that start

with “P1” and some “P3”):

- The “Select Manufacturer” screen
displays.

- Use the UP and DOWN
buttons, as necessary, to high­light the appropriate manufactur­er, then press the ENTER/LD

button to display the correct

DTC for your vehicle.

About the CanOBD2&1 Scan Tool

ADJUSTMENTS/SETTINGS AND DTC LIBRARY

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If a definition for the DTC you
entered is not available, an advi­sory message shows on the
CanOBD2&1 Scan Tool’s display.

4. If you wish to view definitions for addi­tional DTCs, press the ENTER/LD
button to return to the DTC Library
screen, and repeat steps 2 and 3.

5. When all desired DTCs have been viewed, press the ERASE
button to exit the DTC Library and return to the Setup Menu.

Selecting the Display Language

1. Use the UP and DOWN buttons, as necessary, to highlight
Select Language in the Setup Menu, then press the ENTER/LD

button.

■ The Select Language screen dis-

plays.

■ The currently selected display

Language is highlighted.

2. Press the UP or DOWN button,

as necessary, to highlight the desired
display language.

3. When the desired display language is
highlighted, press the ENTER/LD
button to save your changes and return
to the Setup Menu.

Setting the Unit of Measurement

1. Use the UP and DOWN but-
tons, as necessary, to highlight Unit of
Measure in the Setup Menu, then
press the ENTER/LD button.

2. Press the UP or DOWN button,

as necessary, to highlight the desired

Unit of Measure.

3. When the desired Unit of Measure

value is selected, press the ENTER/LD

button to save your changes and

return to the Setup Menu.

About the CanOBD2&1 Scan Tool

ADJUSTMENTS/SETTINGS AND DTC LIBRARY

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Exiting the MENU Mode

1. Use the UP and DOWN buttons, as necessary, to highlight
Menu Exit in the Setup Menu, then press the ENTER/LD but-

ton.

■ If diagnostic data IS currently stored in the CanOBD2&1 Scan

Tool’s memory, the stored data is shown on the display.

■ If diagnostic data IS NOT currently stored in the CanOBD2&1

Scan Tool’s memory, the “Linking Instructions” screen is shown
on the display.

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CanOBD2&1 Scan Tool Controls

CONTROLS AND INDICATORS

CONTROLS AND INDICATORS

See Figure 1 for the locations of items 1 through 16, below.

1. ERASE button - Erases Diagnostic Trouble Codes (DTCs),

and “Freeze Frame” data from your vehicle’s computer, and resets
Monitor status.(“Freeze F r ame”data and Monitor status are applicable
to OBD2 systems only.)

2. DTC SCROLL button - Displays the DTC View screen and/or

scrolls the LCD display to view DTCs when more than one DTC is
present.

3. POWER/LINK button - When the CanOBD2&1 Scan Tool IS

NOT connected to a vehicle, turns the CanOBD2&1 Scan Tool “On”
and “Off”.When the CanOBD2&1 Scan Tool is connected to a vehicle,
links the CanOBD2&1 Scan Tool to the vehicle’s PCM to retrieve diag­nostic data from the computer’s memory. (The LINK function is appli­cable to OBD2 systems only.)

To tur n the CanOBD2&1 Scan Tool "On", you must press and
hold the POWER/LINK button for appro ximately 3 seconds.

Figure 1. Controls and Indicators

11

7
6

1
2
5

10
8

9
3

4

16

12

13 14

15

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CanOBD2&1 Scan Tool Controls

CONTROLS AND INDICATORS

4. ENTER/LIVE DATA button - When in MENU mode, confirms

the selected option or value. When linked to a vehicle, places the
CanOBD2&1 Scan Tool in "Live Data" mode.

5. DOWN button - When in MENU mode, scrolls DOWN through

the menu and submenu selection options. When retrieving and view­ing DTCs, scrolls down through the current display screen to display
any additional data.

6. UP button - When in MENU mode, scrolls UP through the

menu and submenu selection options. When retrieving and viewing
DTCs, scrolls ups through the current display screen to display any
additional data.

7. GREEN LED - Indicates that all engine systems are running nor-

mally (all Monitors on the vehicle are active and performing their diag­nostic testing, and no DTCs are present). (Monitors are applicable to
OBD2 systems only.)

8. YELLOW LED - Indicates there is a possible problem.A “Pending”

or a history DTC is present and/or some of the vehicle’s emission mon­itors have not run their diagnostic testing.(Monitors and pending DTCs
are applicable to OBD2 systems only.)

9. RED LED - Indicates there is a problem in one or more of the vehi-

cle’s systems.The red LED is also used to show that DTC(s) are pres­ent. DTCs are shown on the CanOBD2&1 Scan Tool’s display. In this
case, the Malfunction Indicator (“Check Engine”) lamp on the vehicle’s
instrument panel will light steady on.

10. Display - Displays Setup Menu and submenus, test results,

CanOBD2&1 Scan Tool functions and Monitor status information. See
DISPLAY FUNCTIONS, on next page, for more details. (Monitors are
applicable to OBD2 systems only.)

11. Cable - Connects the CanOBD2&1 Scan Tool to the vehicle’ s Data

Link Connector (DLC) when retrieving codes from OBD I systems
(used with items 12, 13, 14 and 16).

12. CHRYSLER Connector Cable Adaptor - Installs on cable (item

11) when connecting to a Chrysler OBD1 Data Link Connector.

13. FORD Connector Cable Adaptor - Installs on cable (item 11)

when connecting to a Ford OBD1 Data Link Connector.

14. GM Connector Cable Adaptor - Installs on cable (item 11) when

connecting to a GM OBD1 Data Link Connector.

15. OBD II Cable - Connects the CanOBD2&1 Scan Tool to the vehi-

cle's Data Link Connector (DLC) when retrieving codes from OBD II
systems.

16. TOYOTA Connector Cable Adaptor - Installs on cable (item 11)

when connecting to a Toyota OBD1 Data Link Connector.

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CanOBD2&1 Scan Tool Controls

DISPLAY FUNCTIONS

DISPLAY FUNCTIONS

See Figure 2 for the locations of items 1 through 16, below.

1. I/M MONITOR STATUS field - Identifies the I/M Monitor status
area. (This function is applicable to OBD2 systems only.)

2. Monitor icons - Indicate which Monitors are supported by the vehi­cle under test, and whether or not the associated Monitor has run
its diagnostic testing (Monitor status).When a Monitor icon is solid,
it indicates that the associated Monitor has completed its diagnos­tic testing.When a Monitor icon is flashing, it indicates that the vehi­cle supports the associated Monitor, but the Monitor has not yet run
its diagnostic testing. (This function is applicable to OBD2 systems
only.)

3. Vehicle icon - Indicates whether or not the CanOBD2&1 Scan
Tool is being properly powered through the vehicle’s Data Link
Connector (DLC). A visible icon indicates that the CanOBD2&1
Scan Tool is being powered through the vehicle’s DLC connector.

4. Link icon - Indicates whether or not the CanOBD2&1 Scan
Tool is communicating (linked) with the vehicle’s on-board comput­er.When visible, the CanOBD2&1 Scan Tool is communicating with
the computer. If the Link icon is not visible, the CanOBD2&1 Scan
Tool is not communicating with the computer.

5. Computer icon - When this icon is visible it indicates that the
CanOBD2&1 Scan Tool is linked to a personal computer.An option­al “PC Link Kit” is available that makes it possible to upload
retrieved data to a personal computer.

Figure 2. Display Functions

12 13

21

11

3
4
5
6

7
8

15
16

14
10

9

CanOBD2&1 13

E

CanOBD2&1 Scan Tool Controls

DISPLAY FUNCTIONS

6. CanOBD2&1 Scan Tool Internal Battery icon - When visible,

indicates the CanOBD2&1 Scan Tool batteries are “low” and should
be replaced.If the batteries are not replaced when the battery sym­bol is "on", all 3 LEDs will light up as a last resort indicator to
warn you that the batteries need replacement. No data will be dis­played on screen when all 3 LEDs are lit.

7. DTC Display Area - Displays the Diagnostic Trouble Code (DTC)
number. Each fault is assigned a code number that is specific to
that fault.

8. Test Data Display Area - Displays DTC definitions, Freeze Frame
data, and other pertinent test information messages.

9. FREEZE FRAME icon - Indicates that there is Freeze Frame data
from “Priority Code” (Code #1) stored in the vehicle’s computer
memory.

10. HISTORY icon - Indicates the currently displayed DTC is a

“History” code.

11. PENDING icon - Indicates the currently displayed DTC is a

“Pending” code.

12. MIL icon - Indicates the status of the Malfunction Indicator Lamp

(MIL). The MIL icon is visible only when a DTC has commanded
the MIL on the vehicle’s dashboard to light.

13. Code Number Sequence - The CanOBD2&1 Scan Tool assigns

a sequence number to each DTC that is present in the computer’s
memory, starting with “01.” This number indicates which code is
currently displayed.Code number “01” is always the highest prior­ity code, and the one for which “Freeze Frame” data has been
stored. (Freeze Frame data is applicable to OBD2 systems only.)

If “01” is a “Pending” code, there may or may not be
“Freeze Frame” data stored in memory.

14. Code Enumerator - Indicates the total number of codes retrieved

from the vehicle’s computer.

15. Generic DTC icon - When visible, indicates that the currently

displayed DTC is a “Generic” or “Universal”code. (This function is
applicable to OBD2 systems only.)

16. Enhanced DTC icon - When visible, indicates that the current-

ly displayed DTC is a Manufacturer Specific Code. (This function
is applicable to OBD2 systems only.)

14 CanOBD2&1

E

CanOBD2&1 Scan Tool Controls

VIEWING DTCs IN THE CANOBD2&1 SCAN TOOL’S MEMORY

VIEWING DTCs IN THE CANOBD2&1 SCAN TOOL’S
MEMORY

To view DTC’s and other diagnostic data stored in the CanOBD2&1
Scan Tool’s memory, do the following:

1. With no DLC cable connected to the CanOBD2&1 Scan Tool, press

the POWER/LINK button to turn the CanOBD2&1 Scan Tool
“on”.

■ The “To Retrieve DTCs”screen shows

on the CanOBD2&1 Scan Tool’s dis­play. Press the button for instruc-

tions to view DTC’s in memory.

2. Press the ENTER/LD button.

■ The “Select OBD System” screen dis-

plays.

3. Use the and keys to highlight

and select your vehicle’s OBD system
(OBD1 or OBD2). Press the ENTER/LD

button to continue.

■ Select “Back” if you wish to return to

the Main Menu.

4. If DTCs are present in the CanOBD2&1

Scan Tool’s memory, the first stored
DTC will display on the screen.

■ If more than one DTC is present, use

the DTC SCROLL button to
scroll through the DTC’s.

5. For OBD2 systems only - Freeze

Frame Data (if available) will display
after DTC #1.

6. If no DTCs are in the CanOBD2&1 Scan

Tool’s memory, a “No DTC’s are
presently stored in the Code Readers
memory” message displays.

CanOBD2&1 15

E

Preparation for Testing

PRELIMINARY VEHICLE DIAGNOSIS WORKSHEET

PRELIMINARY VEHICLE DIAGNOSIS WORKSHEET

The purpose of this form is to help you gather preliminary information on
your vehicle before you retrieve codes.By having a complete account of
your vehicle's current problem(s), you will be able to systematically pin­point the problem(s) by comparing your answers to the fault codes you
retrieve. You can also provide this information to your mechanic to assist
in diagnosis and help avoid costly and unnecessary repairs. It is impor­tant for you to complete this f orm to help you and/or y our mechanic have
a clear understanding of your vehicle's problems. An electronic version
of this Preliminary Vehicle Diagnosis Worksheet is available online at
www

.canOBD2.com.You can complete the form online and print a copy

to take to your mechanic.

NAME:
DATE:
VIN*:
YEAR:
MAKE:
MODEL:
ENGINE SIZE:
VEHICLE MILEAGE:

*VIN: Vehicle Identification Number, found at the base of the windshield
on a metallic plate, or at the driver door latch area (consult your vehicle
owner's manual for location).

TRANSMISSION:

❑

Automatic

❑ Manual

Please check all applicable items in each category.

DESCRIBE THE PROBLEM:

16 CanOBD2&1

E

Preparation for Testing

PRELIMINARY VEHICLE DIAGNOSIS WORKSHEET

WHEN DID YOU FIRST NOTICE THE PROBLEM:

❑ Just Started
❑ Star ted Last Week
❑ Star ted Last Month
❑ Other:

LIST ANY REPAIRS DONE IN THE PAST SIX MONTHS:

PROBLEMS STARTING

ENGINE QUITS OR STALLS

IDLING CONDITIONS

RUNNING CONDITIONS

❑ No symptoms
❑ Will not crank

❑ Cranks, but will not start
❑ Star ts, but takes a long time

❑ No symptoms
❑ Right after star ting
❑ When shifting into gear
❑ During steady-speed dr iving

❑ Right after vehicle comes to a stop
❑ While idling
❑ During acceleration
❑ When parking

❑ No symptoms
❑ Is too slow at all times
❑ Is too fast

❑ Is sometimes too fast or too slow
❑ Is rough or uneven
❑ Fluctuates up and down

❑ No symptoms
❑ Runs rough
❑ Lacks power
❑ Bucks and jerks
❑ Poor fuel economy
❑ Hesitates or stumbles on

accelerations

❑ Backfires
❑ Misfires or cuts out
❑ Engine knocks, pings or rattles
❑ Surges
❑ Dieseling or run-on

CanOBD2&1 17

E

Preparation for Testing

PRELIMINARY VEHICLE DIAGNOSIS WORKSHEET

AUTOMATIC TRANSMISSION PROBLEMS (if applicable)

PROBLEM OCCURS

❑ Morning ❑ Afternoon ❑ Anytime

ENGINE TEMPERATURE WHEN PROBLEM OCCURS

❑ Cold ❑ Warm ❑ Hot

DRIVING CONDITIONS WHEN PROBLEM OCCURS

DRIVING HABITS

GASOLINE USED

WEATHER CONDITIONS WHEN PROBLEM OCCURS

CHECK ENGINE LIGHT / DASH WARNING LIGHT

❑

Sometimes ON ❑ Always ON ❑ Never ON

PECULIAR SMELLS

STRANGE NOISES

❑ Shor t - less than 2 miles
❑ 2 - 10 miles
❑ Long - more than 10 miles
❑ Stop and go
❑ While turning
❑ While braking
❑ At gear engagement
❑ With A/C operating

❑ With headlights on
❑ During acceleration
❑ Mostly driving downhill
❑ Mostly driving uphill
❑ Mostly driving level
❑ Mostly driving cur vy roads
❑ Mostly driving rough roads

❑ Mostly city driving
❑ Highway
❑ Park vehicle inside
❑ Park vehicle outside

❑ Drive less than 10 miles per day
❑ Drive 10 to 50 miles per day
❑ Drive more than 50 miles per day

❑ 87 Octane
❑ 89 Octane

❑ 91 Octane
❑ More than 91 Octane

❑ 32 - 55° F (0 - 13° C)
❑ Below freezing (32° F / 0° C)

❑ Above 55° F (13° C)

❑ "Hot"
❑ Sulfur ("rotten egg")
❑ Burning r ubber

❑ Gasoline
❑ Burning oil
❑ Electrical

❑ Rattle
❑ Knock

❑ Squeak
❑ Other

❑ No symptoms
❑ Shifts too early or too late
❑ Changes gear incorrectly

❑ Vehicle does not move when in

gear

❑ Jerks or bucks

18 CanOBD2&1

E

Preparation for Testing

BEFORE YOU BEGIN

BEFORE Y OU BEGIN

The CanOBD2&1 Scan Tool
aids in monitoring electronic­and emissions-related faults in
your vehicle and retrieving
fault codes related to malfunc­tions in these systems.
Mechanical problems such as
low oil level or damaged
hoses, wiring or electrical connectors can cause poor engine perform­ance and may also cause a fault code to set.Fix any known mechan­ical problems before performing any test. See your vehicle’s ser vice
manual or a mechanic for more information.

Check the following areas before starting any test:

■ Check the engine oil, power steering fluid, transmission fluid (if

applicable), engine coolant and other fluids for proper le v els .Top off
low fluid levels if needed.

■ Make sure the air filter is clean and in good condition. Make sure all

air filter ducts are properly connected. Check the air filter ducts for
holes, rips or cracks.

■ Make sure all engine belts are in good condition.Check for cracked,

torn, brittle, loose or missing belts.

■ Make sure mechanical linkages to engine sensors (throttle,

gearshift position, transmission, etc.) are secure and properly con­nected. See your vehicle’s service manual for locations.

■ Check all rubber hoses (radiator) and steel hoses (vacuum/fuel) for

leaks, cracks, blockage or other damage. Make sure all hoses are
routed and connected properly.

■ Make sure all spark plugs are clean and in good condition. Check

for damaged, loose, disconnected or missing spark plug wires.

■ Make sure the battery terminals are clean and tight. Check for cor-

rosion or broken connections. Check for proper battery and charg­ing system voltages.

■ Check all electrical wiring and harnesses for proper connection.

Make sure wire insulation is in good condition, and there are no
bare wires.

■ Make sure the engine is mechanically sound. If needed, perform a

compression check, engine vacuum check, timing chec k (if applica­ble), etc.

CanOBD2&1 19

E

Preparation for Testing

VEHICLE SERVICE MANUALS

VEHICLE SERVICE MANUALS

Always refer to the manufacturer’s service manual for your vehicle
before performing any test or repair procedures.Contact your local car
dealership, auto parts store or bookstore for availability of these man­uals.The following companies publish valuable repair manuals:

■ Haynes Publications

861 Lawrence Drive
Newbury Park, California 91320
Phone: [phone]

■ Mitchell International

14145 Danielson Street
Poway, California 92064
Phone: [phone]

■ Motor Publications

5600 Crooks Road, Suite 200
Troy, Michigan 48098
Phone: [phone]

FACTORY SOURCES

Ford, GM, Chrysler, Honda, Isuzu, Hyundai and Subaru Service
Manuals

■ Helm Inc.

14310 Hamilton Avenue
Highland Park, Michigan 48203
Phone: [phone]

20 CanOBD2&1

E

General Code Retrieval Procedures

OBD1 SYSTEMS / OBD2 SYSTEMS

Procedures for Retrieving Diagnostic Trouble Codes from OBD1 sys­tems are vehicle manufacturer specific.Each manufacturer uses their
own procedure.

Procedures for retrieving Diagnostic Trouble Codes from OBD2
systems are generic, and apply to all vehicles equipped with OBD2
systems.

From the following list, select the procedure that applies to your vehi­cle’s OBD system, and proceed to appropriate section for detailed
code retrieval procedures.

OBD1 SYSTEMS

Most cars and light trucks (under 8500 GW) sold in the U.S.from early
1980’s to 1995 are equipped with what is known as the first generation
of On-Board Diagnostics or “OBD1”.

■ If your Chrysler/Jeep, Ford, GM or Toyota vehicle, (1995 and older)

is equipped with an ‘OBD1 System”, proceed to the proper section
as indicated below, for a detailed application list and code retrieval
procedures:

■ CHRYSLER/JEEP . . . . . . . . . . . . . . . .page 58

■ FORD . . . . . . . . . . . . . . . . . . . . . . . . .page 64

■ GM . . . . . . . . . . . . . . . . . . . . . . . . . . .page 87

■ TOYOTA . . . . . . . . . . . . . . . . . . . . . . . .page 93

OBD2 SYSTEMS

ALL 1996 and newer cars and light trucks (under 8500 GW) sold in the
U.S.are equipped with what is known as the second generation of On­Board Diagnostics or “OBD2”.

■ If your vehicle (1996 and newer) is equipped with an “OBD2

System”, proceed to the “OBD2 SYSTEMS” section on page 21 for
a detailed application list, code retrieval procedures, Monitor status,
and Freeze Frame data information.

CanOBD2&1 21

E

OBD2 Systems

VEHICLES COVERED

VEHICLES COVERED

The CanOBD2&1 Scan Tool is designed to work on all OBD 2 compli­ant vehicles.All 1996 and newer vehicles (cars and light trucks) sold in
the United States are OBD 2 compliant.

Federal law requires that all 1996 and newer cars and light
trucks sold in the United States must be OBD 2 compliant;
this includes all Domestic, Asian and European vehicles.

Some 1994 and 1995 vehicles are OBD 2 compliant. To find out if a
1994 or 1995 vehicle is OBD 2 compliant, check the following:

1. The Vehicle Emissions Control Information (VECI) Label. This

label is located under the hood or by the radiator of most vehicles.If
the vehicle is OBD 2 compliant, the label will state “OBD II Certified.”

2. Government Regulations require that

all OBD 2 compliant vehicles must
have a “common” sixteen-pin Data
Link Connector (DLC).

Some 1994 and 1995 vehicles have 16-pin connectors but
are not OBD 2 compliant. Only those vehicles with a Vehicle
Emissions Control Label stating “OBD II Certified” are OBD 2
compliant.

Data Link Connector (DLC) Location

The 16-pin DLC is usually
located under the instrument
panel (dash), within 12 inches
(300 mm) of center of the
panel, on the driver’s side of
most vehicles.It should be eas­ily accessible and visible from
a kneeling position outside the
vehicle with the door open.

VEHICLE EMISSION CONTROL INFORMATION

ENGINE FAMILY EFN2.6YBT2BA

VEHICLE

MANUFACTURER

REFER TO SERVICE MANUAL FOR ADDITIONAL INFORMATION
TUNE-UP CONDITIONS: NORMAL OPERATING ENGINE TEMPERATURE,
ACCESSORIES OFF, COOLING FAN OFF, TRANSMISSION IN NEUTRAL

EXHAUST EMISSIONS STANDARDS STANDARD CATEGORY
CERTIFICATION

IN-USE

SPARK PLUG

TYPE NGK BPRE-11

GAP: 1.1MM

DISPLACEMENT 2.6L

THIS VEHICLE CONFORMS TO U.S. EPA AND STATE
OF CALIFORNIA REGULATIONS APPLICABLE TO
1999 MODEL YEAR NEW TLEV PASSENGER CARS.

TLEV
TLEV INTERMEDIATE

CATALYST

OBD II

CERTIFIED

OBD II

CERTIFIED

12345678
910111213141516

LEFT CORNER

OF DASH

NEAR

CENTER

OF DASH

BEHIND

ASHTRAY

22 CanOBD2&1

E

OBD2 Systems

DIAGNOSTIC TROUBLE CODES (DTCs)

On some Asian and European vehicles the DLC is located
behind the “ashtray”(the ashtray must be removed to access
it) or on the far left corner of the dash. If the DLC cannot be
located, consult the vehicle’s service manual for the location.

DIAGNOSTIC TROUBLE CODES (DTCs)

Diagnostic Trouble Codes (DTCs) are
meant to guide you to the proper serv­ice procedure in the vehicle’s service
manual. DO NOT replace parts based
only on DTCs without first consulting
the vehicle’s service manual for prop­er testing procedures for that particular
system, circuit or component.

DTCs are alphanumeric codes that are used to identify a
problem that is present in any of the systems that are mon­itored by the on-board computer (PCM). Each trouble code
has an assigned message that identifies the circuit, compo­nent or system area where the problem was found.

OBD 2 diagnostic trouble codes are made up of five charac­ters:

■ The 1st character is a letter. It identifies the “main system” where

the fault occurred (Body, Chassis, Powertrain, or Network).

■ The 2nd character is a numeric digit.It identifies the “type” of code

(Generic or Manufacturer-Specific).

Generic DTCs are codes that are used by all vehicle manu­facturers. The standards for generic DTCs, as well as their
definitions, are set by the Society of Automotive Engineers
(SAE).

Manufacturer-Specific DTCs are codes that are controlled
by the vehicle manufacturers.The Federal Government does
not require vehicle manufacturers to go beyond the stan­dardized generic DTCs in order to comply with the new
OBD2 emissions standards.Howev er , manuf acturers are free
to expand beyond the standardized codes to make their sys­tems easier to diagnose.

■ The 3rd character is a numeric digit. It identifies the specific sys-

tem or sub-system where the problem is located.

■ The 4th and 5th characters are numeric digits. They identify the

section of the system that is malfunctioning.

Diagnostic T rouble

Codes (DTCs) are

codes that identify a

specific problem area.

CanOBD2&1 23

E

OBD2 Systems

DIAGNOSTIC TROUBLE CODES (DTCs)

DTCs and MIL Status

When the vehicle’s on-board computer detects
a failure in an emissions-related component
or system, the computer’s internal diagnostic
program assigns a diagnostic trouble code
(DTC) that points to the system (and sub­system) where the fault was found.The diag­nostic program saves the code in the com­puter’s memory. It records a “Freeze Frame” of
conditions present when the fault was found, and lights the Malfunction
Indicator Lamp (MIL). Some faults require detection for two trips in a
row before the MIL is turned on.

The “Malfunction Indicator Lamp” (MIL) is the accepted ter m
used to describe the lamp on the dashboard that lights to
warn the driver that an emissions-related fault has been
found. Some manufacturers may still call this lamp a “Check
Engine” or “Service Engine Soon” light.

P0201 - Injector Circuit Malfunction, Cylinder 1

OBD 2 DTC EXAMPLE

B

-

Body

C

-

Chassis

P

-

Powertrain

U

-

Network

-

Generic

0

-

Manufacturer Specific

1

-

Generic

2

-

Includes both Generic and Manufacturer

3

Specific Codes

Identifies the system where the
problem is located:

1

-

Fuel and Air Metering

2

-

Fuel and Air Metering (injector circuit
malfunction only)

3

-

Ignition System or Misfire

4

-

Auxiliary Emission Control System

5

-

Vehicle Speed Control and Idle Control
System

6

-

Computer Output Circuits

7

-

Transmission

8

-

Transmission

Identifies what section of the system
is malfunctioning

P 0 2 0 1

24 CanOBD2&1

E

OBD2 Systems

CODE RETRIEVAL PROCEDURE

CODE RETRIEVAL PROCEDURE

Never replace a part based only on the DTC definition.

Each DTC has a set of testing procedures, instructions
and flow charts that must be followed to confirm the loca­tion of the problem.This information is found in the vehicle's
service manual. Always refer to the vehicle's service manual
for detailed testing instructions.

Check your vehicle thoroughly before performing
any test. See Before You Begin on page 18 for
details.

ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more infor-
mation.

1. Turn the ignition OFF.

2. Locate the vehicle's 16-pin Data Link

Connector (DLC). See page 21 for con­nector location.

Some DLCs have a plastic cover
that must be removed bef ore con­necting the CanOBD2&1 Scan
Tool cable connector.

If the CanOBD2&1 Scan Tool is
ON, turn it

OFF by pressing the
POWER/LINK button
BEFORE connecting the
CanOBD2&1 Scan

Tool to the DLC.

3. Connect the OBD II Cable to the CanOBD2&1 Scan Tool, then con­nect to the vehicle’s DLC.

■ If you have problems connecting the cable connector to the DLC,

rotate the connector 180° and try again.

■ If you still have problems, check the

pins on the CanOBD2&1 Scan Tool’s
DLC and on the vehicle’s DLC.

4. When the CanOBD2&1 Scan Tool’s
cable connector is properly connected
to the vehicle’s DLC, the unit automati­cally turns ON, and the display shows
instructions for linking to the vehicle’s
on-board computer.

Retrieving and using Diagnostic Trouble Codes (DTCs) for

troubleshooting vehicle operation is only one part of an

overall diagnostic strategy.

CanOBD2&1 25

E

OBD2 Systems

CODE RETRIEVAL PROCEDURE

■ If the unit does not power on automatically when connected to

the vehicle’s DLC connector, it usually indicates there is no
power present at the vehicle’s DLC connector. Check your fuse
panel and replace any burned-out fuses.

■ If replacing the fuse(s) does not correct the problem, consult your

vehicle’s repair man ual to identify the proper computer (PCM) fuse/
circuit, and perform any necessary repairs before proceeding.

5. Turn the ignition on. DO NOT start the engine.

6. Press and release the CanOBD2&1 Scan Tool’s POWER/LINK

button.

■ The CanOBD2&1 Scan Tool will auto-

matically start a check of the vehicle’s
computer to determine which type of
communication protocol it is using.
When the CanOBD2&1 Scan Tool
identifies the computer’s communica­tion protocol, a communication link is
established. The protocol type used
by the vehicle’ s computer is shown on
the display.

A PROTOCOL is a set of rules and procedures for regu­lating data transmission between computers, and between
testing equipment and computers. As of this writing, five
different types of protocols (ISO 9141, Keyword 2000,
J1850 PWM, J1850 VPW and CAN) are in use by vehicle
manufacturers.The CanOBD2&1 Scan Tool automatically
identifies the protocol type and establishes a communica­tion link with the vehicle’s computer.

7. After approximately 10~60 seconds, the CanOBD2&1 Scan Tool will
retrieve and display any Diagnostic Trouble Codes, Monitor Status

and Freeze F r ame Data retriev ed from the v ehicle’s computer mem­ory.

■ If the CanOBD2&1 Scan Tool fails to

link to the vehicle’s computer a
“Linking Failed” message shows on
the CanOBD2&1 Scan Tool’s display.

- Verify the connection at the DLC
and verify the ignition is ON.

- Turn the ignition OFF, wait 5 sec­onds, then turn back ON to reset
the computer.

- Ensure your vehicle is OBD2 compliant.See Vehicles Covered
on page 21 for vehicle compliance verification information.

26 CanOBD2&1

E

OBD2 Systems

CODE RETRIEVAL PROCEDURE

■ The CanOBD2&1 Scan Tool will auto-

matically re-link to the vehicle’s com­puter every 30 seconds to refresh the
data being retrieved. When data is
being refreshed, the message “One
moment Auto – link in progress” is
shown on the display. This action
repeats as long as the CanOBD2&1
Scan Tool is communicating with the
vehicle’s computer.

■ The CanOBD2&1 Scan Tool will dis-

play a code only if codes are present
in the vehicle’s computer memory. If
no codes are present, a “No DTC’s
are presently stored in the vehicle’s
computer” message is displayed.

■ The CanOBD2&1 Scan Tool is capable of retrieving and storing

up to 32 codes in memory, for immediate or later viewing.

8. To read the display:

Refer to Display Functions on page 12 for a description
of display elements.

■ A visible icon indicates that the CanOBD2&1 Scan Tool is

being powered through the vehicle’s DLC connector.

■ A visible icon indicates that the CanOBD2&1 Scan Tool is

linked to (communicating with) the vehicle’s computer.

■ The I/M Monitor Status icons indicate the type and number of

Monitors the vehicle supports, and provide indications of the cur­rent status of the vehicle’s Monitors. A solid Monitor icon indi­cates the associated Monitor has run and completed its testing.
A blinking Monitor icon indicates the associated Monitor has
not run and completed its testing.

■ The upper right hand corner of the

display shows the number of the code
currently being displayed, the total
number of codes retrieved, the type
of code (G = Generic; M = Enhanced
or Manufacturer specific), and
whether or not the displayed code
commanded the MIL on. If the code
being displayed is a PENDING code,
the PENDING icon is shown.

■ The Diagnostic Trouble Code (DTC) and related code definition

are shown in the lower section of the display.

CanOBD2&1 27

E

OBD2 Systems

CODE RETRIEVAL PROCEDURE

In the case of long code definitions, or when viewing
Freeze Frame data, a small arrow is shown in the
upper/lower right-hand corner of the code display area
to indicate the presence of additional information. Use
the

and

buttons, as necessary , to vie w the addi-

tional information.

9. Read and interpret Diagnostic Trouble Codes/system condition
using the display and the green, yellow and red LEDs.

The green, yellow and red LEDs are used (with the LCD
display) as visual aids to make it easier to determine
engine system conditions.

■ Green LED – Indicates that all

engine systems are “OK” and operat­ing normally. All Monitors supported
by the vehicle have run and per­formed their diagnostic testing, and
no trouble codes are present. A zero
will show on the CanOBD2&1 Scan
Tool’s display, and all Monitor icons
will be solid.

■ Yellow LED – Indicates one of the following conditions:

A. A PENDING CODE IS PRESENT – If

the yellow LED is illuminated, it may
indicate a Pending code is present.
Check the CanOBD2&1 Scan Tool’s
display for confirmation. A Pending
code is confirmed by the presence of
a numeric code and the word PEND­ING on the CanOBD2&1 Scan Tool’s
display.

B. MONITOR NOT RUN STA TUS – If the

CanOBD2&1 Scan Tool’s display
shows a zero (indicating there are no
DTC’s present in the vehicle’s com­puter memory), but the yellow LED is
illuminated, it may be an indication
that some of the Monitors supported
by the vehicle have not yet run and
completed their diagnostic testing.
Check the CanOBD2&1 Scan Tool’s display for confirmation. All
Monitor icons that are blinking have not yet run and completed
their diagnostic testing; all Monitor icons that are solid have run
and completed their diagnostic testing.

28 CanOBD2&1

E

OBD2 Systems

CODE RETRIEVAL PROCEDURE

■ Red LED – Indicates there is a prob-

lem with one or more of the vehicle’s
systems.The red LED is also used to
indicate that DTC(s) are present (dis­played on the CanOBD2&1 Scan
Tool’s screen). In this case, the
Malfunction Indicator (Check Engine)
lamp on the vehicle’s instrument panel
will be illuminated.

■ DTC’s that start with “P0”, “P2” and

some “P3” are considered Generic
(Universal). All Generic DTC defini­tions are the same on all OBD2
equipped vehicles. The CanOBD2&1
Scan Tool automatically displays the
code definitions for Generic DTC’s.

If the Generic definition for the
currently displayed code is not
available, an advisory message
shows on the CanOBD2&1
Scan Tool’s display.

■ DTC’s that start with “P1” and some

“P3” are Enhanced (Manufacturer spe­cific) codes and their code definitions
vary with each vehicle manufacturer.
When an Enhanced (Manufacturer
specific) DTC is retrieved, the LCD dis­play shows a list of vehicle man ufactur­ers. Use the UP and DOWN
buttons, as necessary, to highlight the
appropriate manufacturer, then press the ENTER/LD button to
display the correct code definition for your vehicle.

If the manufacturer for your vehicle is not listed, use the

UP and DOWN buttons, as necessary, to select
Other manufacturer and press the ENTER/LD but-

ton for additional DTC information.

If the Manufacturer Specific
definition for the currently dis­played code is not av ailab le, an
advisory message shows on
the CanOBD2&1 Scan Tool’s
display.

CanOBD2&1 29

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OBD2 Systems

CODE RETRIEVAL PROCEDURE

10.If more than one code was retrieved press the DTC SCROLL

button, as necessary, to display additional codes one at a time.

■ Each time the DTC SCROLL buttonis pressed and released,

the CanOBD2&1 Scan Tool will scroll and display the next DTC in
sequence until all DTCs in its memory have displayed.

■ Freeze Frame Data (if available) will display after DTC #1.

Whenever the Scroll function is used to view additional
codes, the CanOBD2&1 Scan Tool’s communication link
with the vehicle’s computer disconnects. To re-establish
communication, press the POWER/LINK button again.

■ In OBD2 systems, when an emis-

sions-related engine malfunction
occurs that causes a DTC to set, a
record or snapshot of engine condi­tions at the time that the malfunction
occurred is also saved in the vehi­cle’s computer memory. The record
saved is called Freeze Frame data.
Saved engine conditions include, but are not limited to: engine
speed, open or closed loop operation, fuel system commands,
coolant temperature, calculated load value, fuel pressure, vehi­cle speed, air flow rate, and intake manifold pressure.

If more than one malfunction is present that causes more
than one DTC to be set, only the code with the highest pri­ority will contain Freeze Frame data.The code designated
“01” on the CanOBD2&1 Scan Tool’s display is referred to
as the PRIORITY code, and Freeze Frame data always
refers to this code. The prior ity code is also the one that
has commanded the MIL on.

Retrieved information can be uploaded to a Personal
Computer (PC) with the use of an optional “PC Link Kit.”
See instructions included with PC-Link program for more
information.

11.Determine engine system(s) condition by viewing the CanOBD2&1

Scan Tool’s display for any retrieved Diagnostic Trouble Codes,
code definitions, Freeze Frame data and interpreting the green,
yellow and red LEDs.

■ If DTC’s were retrieved and you are going to perform the repairs

yourself, proceed by consulting the Vehicle’s Service Repair
Manual for testing instructions, testing procedures, and flow
charts related to retrieved code(s).

■ If you plan to take the vehicle to a professional to ha v e it serviced,

complete the Preliminary Vehicle Diagnosis Worksheet on
page 15 and take it together with the retrieved codes, freez e frame
data and LED information to aid in the troubleshooting procedure.

30 CanOBD2&1

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OBD2 Systems

ERASING DIAGNOSTIC TROUBLE CODES (DTCs)

■ To prolong battery life, the CanOBD2&1 Scan Tool automatically

shuts “Off” approximately three minutes after it is disconnected
from the vehicle.The DTCs retrieved, Monitor Status and Freeze
Frame data (if any) will remain in the CanOBD2&1 Scan Tool’s
memory, and may be viewed at any time by turning the unit “On”.
If the CanOBD2&1 Scan Tool’s batteries are removed, or if the
CanOBD2&1 Scan Tool is re-linked to a vehicle to retrieve codes/
data, any prior codes/data in its memory are automatically cleared.

ERASING DIAGNOSTIC TROUBLE CODES (DTCs)

When the CanOBD2&1 Scan Tool’s ERASE function is
used to erase DTCs from the vehicle's on-board comput­er, "Freeze Frame" data and manufacturer-specific
enhanced data are also erased.

If you plan to take the vehicle to a Service Center for repair, DO NOT
erase the codes from the vehicle's computer. If the codes are erased,
valuable information that might help the technician troubleshoot the
problem will also be erased.

Erase DTCs from the computer's memory as follows:

When DTCs are erased from the vehicle's computer memo­ry, the I/M Readiness Monitor Status program resets the sta­tus of all Monitors to a not run "flashing" condition. To set all
of the Monitors to a DONE status, an OBD 2 Drive Cycle
must be performed.Refer to your vehicle's service manual f or
information on how to perform an OBD 2 Drive Cycle for the
vehicle under test.

The CanOBD2&1 Scan Tool must
be connected to the vehicle’s DLC
to erase the codes from the com­puter’s memory. If you press the
ERASE button when the
CanOBD2&1 Scan Tool is not con­nected to the vehicle’s DLC, the
erase instruction screen displays.

1. If not connected already, connect the
CanOBD2&1 Scan Tool to the vehicle's
DLC, and turn the ignition "On.” (If the
CanOBD2&1 Scan Tool is already con­nected and linked to the vehicle's com­puter, proceed directly to step 4. If not,
continue to step 2.)

2. Turn the ignition ON. DO NOT star t the
engine. Press and release the
POWER/LINK button to establish
communication with the vehicle's com­puter.

CanOBD2&1 31

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OBD2 Systems

I/M READINESS TESTING

3. Press and release the ERASE but-

ton. A confirmation message shows on
the LCD display.

- If you are sure you want to proceed

press the ERASE button again to
erase DTCs from the vehicle’s com­puter.

- If you do not want to continue with the erase process, press the

POWER/LINK button to exit the erase mode.

4. If you chose to erase DTCs, a progress

screen displays while the erase function
is in progress.

■ If the erase was successful, a confir-

mation message shows on the dis­play. Press the POWER/LINK
button to return to the DTC screen.

■ If the erase was not successful, an

advisory message shows on the dis­play. Verify that the CanOBD2&1
Scan Tool is properly connected to
the vehicle’s DLC and that the igni­tion is on, then repeat steps 2 and 3,
above.

Erasing DTCs does not fix the problem(s) that caused the
code(s) to be set.If proper repairs to correct the problem that
caused the code(s) to be set are not made, the code(s) will
appear again (and the check engine light will illuminate) as
soon as the vehicle is driven long enough for its Monitors to
complete their testing.

I/M READINESS TESTING

I/M is an Inspection and Maintenance program legislated by the
Government to meet federal clean-air standards.

The program requires that a vehicle be taken periodically to an
Emissions Station for an "Emissions Test" or "Smog Check,” where the
emissions-related components and systems are inspected and tested
for proper operation. Emissions Tests are generally performed once a
year, or once every two years.

On OBD 2 systems, the I/M program is enhanced by requiring vehicles to
meet stricter test standards. One of the tests instituted by the Federal
Government is called I/M 240. On I/M 240, the vehicle under test is driv­en under different speeds and load conditions on a dynamometer for 240
seconds, while the vehicle's emissions are measured.

32 CanOBD2&1

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OBD2 Systems

I/M READINESS TESTING

Emissions tests vary depending on the geographic or region­al area in which the vehicle is registered.If the vehicle is reg­istered in a highly urbanized area, the I/M 240 is probably the
type of test required.If the vehicle is registered in a rural area,
the stricter “dynamometer type” test may not be required.

I/M Readiness Monitors

I/M Readiness shows whether the various emissions-related systems
on the vehicle are operating properly and are ready for Inspection and
Maintenance testing.

State and Federal Gov ernments enacted Regulations, Procedures and
Emission Standards to ensure that all emissions-related components
and systems are continuously or periodically monitored, tested and
diagnosed whenever the vehicle is in operation. It also requires vehi­cle manufacturers to automatically detect and report any problems or
faults that may increase the v ehicle's emissions to an unacceptable lev el.

The vehicle's emissions control system consists of several compo­nents or sub-systems (Oxygen Sensor, Catalytic Conv erter, EGR, Fuel
System, etc.) that aid in reducing vehicle emissions.

To have an efficient Vehicle Emission Control System, all the emis­sions-related components and systems must work correctly whenever
the vehicle is in operation.

To comply with State and Federal Government regulations, vehicle
manufacturers designed a series of special computer programs called
"Monitors" that are programmed into the vehicle's computer. Each of
these Monitors is specifically designed to run tests and diagnostics on
a specific emissions-related component or system (Oxygen Sensor,
Catalytic Converter, EGR Valve, Fuel System, etc.) to ensure their
proper operation. Currently, there are a maximum of eleven Monitors
available for use.

Each Monitor has a specific function to test and diagnose
only its designated emissions-related component or system.
The names of the Monitors (Oxygen Sensor Monitor, Catalyst
Monitor, EGR Monitor, Misfire Monitor, etc.) describe which
component or system each Monitor is designed to test and
diagnose.

Emissions Inspection and Maintenance (I/M) Readiness

Monitor Status Inf

ormation

I/M Readiness Monitor Status shows which of the vehicle's Monitors
have run and completed their diagnosis and testing, and which ones
have not yet run and completed testing and diagnosis of their desig­nated sections of the vehicle's emissions system.

CanOBD2&1 33

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OBD2 Systems

I/M READINESS TESTING

■ If a Monitor was able to meet all the conditions required to enable it

to perform the self-diagnosis and testing of its assigned engine sys­tem, it means the monitor "HAS RUN.”

■ If a Monitor has not yet met all the conditions required for it to per-

form the self-diagnosis and testing of its assigned engine system; it
means the Monitor "HAS NOT RUN.”

The Monitor Run/Not Run status does not show whether
or not a problem exists in a system. Monitor status only
indicates whether a particular Monitor has or has not run
and performed the self-diagnosis and testing of its asso­ciated system.

Performing I/M Readiness Quick Check

When a vehicle first comes from the factory, all Monitors indi­cate a “HAVE RUN” status. This indicates that all Monitors
have run and completed their diagnostic testing.The “HAVE
RUN” status remains in the computer's memory, unless the
Diagnostic Trouble Codes are erased or the vehicle's com­puter memory is cleared.

The CanOBD2&1 Scan Tool allows you to retrieve Monitor/System
Status Information to help you determine if the vehicle is ready for an
Emissions Test (Smog Check). In addition to retrieving Diagnostic
Trouble Codes, the CanOBD2&1 Scan Tool also retrieves Monitor
Run/Not Run status. This information is very important since different
areas of the state/country have different emissions laws and regulations
concerning Monitor Run/Not Run status.

Before an Emissions Test (Smog Check) can be performed, your vehi­cle must meet certain rules, requirements and procedures legislated
by the Federal and state (country) governments where you live.

1. In most areas, one of the requirements that must be met before a
vehicle is allowed to be Emissions Tested (Smog Checked) is that
the vehicle does not have any Diagnostic Trouble Codes present
(with the exception of PENDING Diagnostic Trouble Codes).

2. In addition to the requirement that no Diagnostic Trouble Codes be
present, some areas also require that all the Monitors that a partic­ular vehicle supports indicate a "Has Run" status condition before
an Emissions Check may be performed.

3. Other areas may only require that some (but not all) Monitors indi­cate a "Has Run" status before an Emissions Test (Smog Check)
may be performed.

34 CanOBD2&1

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OBD2 Systems

I/M READINESS TESTING

Monitors with a "Has Run" status indicate that all the
required conditions they needed to perform diagnosis
and testing of their assigned engine area (system) have
been met, and all diagnostic testing has completed suc­cessfully.

Monitors with a "Has Not Run" status have not yet met
the conditions they need to perform diagnosis and test­ing of their assigned engine area (system), and have not
been able to perform diagnostic testing on that system.

The green, yellow and red LEDs provide a quic k wa y to help y ou deter­mine if a vehicle is ready for an Emissions Test (Smog Check). Follow
the instructions below to perform the Quick Check.

Perform the Code Retrieval Procedure as described on page 24,
then interpret the LED indications as follows:

Interpreting I/M Readiness Test Results

1. GREEN LED - Indicates that all engine

systems are "OK" and operating nor­mally (all Monitors supported by the
vehicle have run and performed their
self-diagnostic testing). The vehicle is
ready for an Emissions Test (Smog
Check), and there is a good possibility
that it can be certified.

2. YELLOW LED - Determine from the Code Retrieval Procedure
(page 24) which of the two possible conditions is causing the yellow
LED to light.

■ If a "PENDING" Diagnostic Trouble

Code is causing the yellow LED to
light, it is possible that the vehicle will
be allowed to be tested for emissions
and certified. Currently, most areas
(states) will allow an Emissions Test
(Smog Check) to be performed if the
only code in the vehicle's computer is
a "PENDING" Diagnostic Trouble
Code.

■ If the illumination of the Yellow LED is

being caused by monitors that “have
not run” their diagnostic testing, then
the issue of the vehicle being ready
for an Emissions Test (Smog Check)
depends on the emissions regula­tions and laws of your local area.

CanOBD2&1 35

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OBD2 Systems

I/M READINESS TESTING

- Some areas require that all Monitors indicate a "Has Run" sta-

tus before they allow an Emissions Test (Smog Check) to be
performed. Other areas only require that some, but not all,
Monitors have run their self-diagnostic testing before an
Emissions Test (Smog Check) may be performed.

From the code retrieval procedure, determine the status of
each Monitor (a solid Monitor icon shows Monitor "Has Run"
status, a flashing Monitor icon indicates "Has Not Run" sta­tus). Take this information to an emissions professional to
determine (based on your test results) if your vehicle is ready
for an Emissions Test (Smog Check).

3. RED LED - Indicates there is a problem
with one or more of the vehicle's sys­tems. A vehicle displaying a red LED is
definitely not ready for an Emissions
Test (Smog Check). The red LED is also
an indication that there are Diagnostic
Trouble Code(s) present (displayed on
the CanOBD2&1 Scan Tool's screen).
The Malfunction Indicator (Check
Engine) Lamp on the vehicle's instrument panel will light steady.
The problem that is causing the red LED to light must be repaired
before an Emissions Test (Smog Check) can be performed.It is also
suggested that the vehicle be inspected/repaired before driving the
vehicle further.

If the Red LED was obtained, there is a definite problem present in
the system(s). In these cases, you have the following options.

■ Repair the vehicle yourself. If you are going to perform the

repairs yourself, proceed by reading the vehicle service manual
and following all its procedures and recommendations.

■ Take the vehicle to a professional to have it serviced. The prob-

lem(s) causing the red LED to light must be repaired before the
vehicle is ready for an Emissions Test (Smog Check).

Using the I/M Readiness Monitor Status to Confirm a Repair

The I/M Readiness Monitor Status function can be used (after repair of
a fault has been performed) to confirm that the repair has been per­formed correctly, and/or to check for Monitor Run Status. Use the fol­lowing procedure to determine I/M Readiness Monitor Status:

1. Using retrieved Diagnostic Trouble Codes (DTCs) and code defini­tions as a guide, and following manufacturer's repair procedures,
repair the fault or faults as instructed.

2. After the fault or faults have been repaired, connect the
CanOBD2&1 Scan Tool to the vehicle's DLC and erase the code or
codes from the vehicle's computer memory.

36 CanOBD2&1

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OBD2 Systems

I/M READINESS TESTING

■ See page 30 for procedures to erase DTCs from the vehicle's on-

board computer.

■ Write the codes down on a piece of paper for reference before

erasing.

3. After the erase procedure is performed, most of the Monitor icons
on the CanOBD2&1 Scan Tool’s display will be flashing. Leave the
CanOBD2&1 Scan Tool connected to the vehicle, and perform a Trip
Drive Cycle for each "flashing" Monitor:

Misfire, Fuel and Comprehensive Component Monitors run
continuously and their icons will always be on solid, even
after the erase function is performed.

■ Each DTC is associated with a specific Monitor.Consult the vehi-

cle's service manual to identify the Monitor (or Monitors) associ­ated with the faults that were repaired.Follow the manuf acturer's
procedures to perform a Trip Drive Cycle for the appropriate
Monitors.

■ While observing the Monitor icons on the CanOBD2&1 Scan

Tool’s display, perform a Trip Drive Cycle for the appropriate
Monitor or Monitors.

WARNING: If the vehicle needs to be driven in order to perform a
Trip Drive Cycle, ALWAYS have a second person help you. One
person should drive the vehicle while the other person observes
the Monitor icons on the CanOBD2&1 Scan Tool for Monitor RUN
status. Trying to drive and observe the CanOBD2&1 Scan Tool at
the same time is dangerous, and could cause a serious traffic
accident.

4. When a Monitor's Trip Drive Cycle is performed properly, the

Monitor icon on the CanOBD2&1 Scan Tool’s display changes from
"flashing" to "solid,” indicating that the Monitor has run and finished
its diagnostic testing.

■ If, after the Monitor has run, the MIL on the vehicle's dash is not

lit, and no stored or pending codes associated with that particu­lar Monitor are present in the vehicle's computer, the repair was
successful.

■ If, after the Monitor has run, the MIL on the vehicle's dash lights

and/or a DTC associated with that Monitor is present in the vehi­cle's computer, the repair was unsuccessful. Refer to the vehi­cle's service manual and recheck repair procedures.

OBD2 Live Data Mode

VIEWING LIVE DATA

CanOBD2&1 37

E

The CanOBD2&1 Scan Tool is a special diagnostic tool that communi­cates with the vehicle's computer.The CanOBD2&1 Scan T ool lets y ou
view and/or "capture" (record) "real-time" Live Data. This information
includes values (volts, rpm, temperature, speed etc.) and system sta­tus information (open loop, closed loop, fuel system status, etc.) gen­erated by the various vehicle sensors, switches and actuators.

In effect the CanOBD2&1 Scan Tool lets you view, in "real time", the
same signal values generated by the sensors, actuators , switches and/or
vehicle system status information used by the vehicle's computer when
calculating and conducting system adjustments and corrections.

The real time (Live Data) vehicle operating information (values/status)
that the computer supplies to the CanOBD2&1 Scan Tool for each sen­sor, actuator, switch, etc.is called Parameter Identification (PID) Data.

Each PID (sensor, actuator switch, status, etc.) has a set of operating
characteristics and features (parameters) that serve to identify it.The
CanOBD2&1 Scan Tool displays this information for each sensor , actu­ator, switch or status that is supported by the vehicle under test.

WARNING: If the vehicle must be driven in order to perform
a troubleshooting procedure, ALWAYS have a second per­son help you. One person should drive the vehicle while the
other person observes the CanOBD2&1 Scan Tool data.
Trying to drive and operate the CanOBD2&1 Scan Tool at the
same time is dangerous, and could cause a serious traffic
accident.

VIEWING LIVE DATA

1. Follow steps 1 through 7 of the Code Retrieval Procedure (page 24)

to place the CanOBD2&1 Scan Tool in "Code Retrieval" mode.

2. Press and release the ENTER/LD
button to place the CanOBD2&1 Scan
Tool in "Live Data" mode.

3. Real-time Live Data (PID) information
supported by the vehicle under test dis­plays.

Remember, what you are viewing is "real-time" Live Data.
The values (volts, rpm, temperature, vehicle speed, system
status etc) for the various PIDS displayed may change as the
vehicle's operating conditions change.

4. A vehicle usually supports several PIDs, however, only a limited
amount of PID data can be displayed on the screen at one time.If
additional PID data is available, a small arrow will be shown on the
display. Use the the UP and DOWN buttons, as necessary,
to scroll up or down to view all available PID data.

OBD2 Live Data Mode

CUSTOMIZING LIVE DATA (PIDs)

38 CanOBD2&1

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■ If communication with the vehicle is

lost while viewing Live Data, a
Communication Lost" message shows
on the CanOBD2&1 Scan T ool's display.

5. If you experience vehicle problems, vie w
and/or compare the Live Data (PID)
information displayed on the CanOBD2&1
Scan Tool to specifications in the vehi­cle's repair manual.

If desired, you can "customize" the Live Data display to show
only those PIDs you are interested in viewing. See
Customizing Live Data (PIDs) below for details. You may
also choose to "capture" (record) Live Data for later viewing.
See Recording Live Data on page 39 for details.

6. You can toggle back and forth between the DTC screen (to view
DTCs) and Live Data screen (to view PIDs) by alternately pressing

and releasing the DTC SCROLL and the ENTER/LD but­tons once (the unit will stay linked to the vehicle while toggling

between modes).If the DTC SCROLL button is pressed twice,
then the screen will scroll to the next DTC and the CanOBD2&1
Scan Tool will be taken out of link.

When toggling from the Live Data to the DTC screen a “One
moment please...” message will temporarily display, followed
by the DTC screen.

CUSTOMIZING LIVE DATA (PIDs)

This feature lets you customize the CanOBD2&1 Scan Tool display to
show only those PIDs that are of interest at the current time.You can
customize the Live Data display b y placing the CanOBD2&1 Scan Tool
in "Custom Live Data" mode and selecting only the PIDs that you wish
to display. To customize the Live Data display, proceed as follows:

1. With the CanOBD1&1 Scan Tool in "Live
Data" mode (see Viewing Live Data on
page 37 for details), press and hold the

ENTER/LD button until the "Mode
Selection Menu" appears.

2. Use the the UP and DOWN but-
tons, as necessary, to highlight Live
Data Menu, then press the ENTER/LD

button.

■ The "Live Data Menu" displays.

3. Use the UP and DOWN but-
tons, as necessary, to highlight Custom
Live Data, then press the ENTER/LD

button.

OBD2 Live Data Mode

RECORDING (CAPTURING) LIVE DATA

CanOBD2&1 39

E

■ The "Custom Live Data" menu displays, with the first PID in the

menu highlighted.

4. Use the UP and DOWN buttons
to scroll through the available PIDs.
When the PID you wish to display is

highlighted, press the ENTER/LD
button to select it (a "checkmark" will
show in the checkbox to the right of the
PID to confirm your selection). Repeat
the procedure until only the PIDs you
want to display have all been selected.

■ To deselect a currently selected PID, highlight the PID, then

press the ENTER/LD button.The checkmark will be removed
from the checkbox.

5. When you are finished making your selection(s), scroll to the end of
the PID list and highlight the word DONE, then press the
ENTER/LD button.

■ The CanOBD2&1 Scan Tool is now in "Custom Live Data" mode.

Only the PIDs you selected are shown on the CanOBD2&1 Scan
Tools display.

■ To toggle between the "Custom Live Data" display and the full

Live Data display, momentarily press the ENTER/LD button.

6. To exit the "Custom Live Data" mode, press and hold the
ENTER/LD button until the “Mode Selection Menu”displays.

RECORDING (CAPTURING) LIVE DATA

You can record and save several frames of Live Data information for
each PID supported by the vehicle in the CanOBD2&1 Scan Tool's
memory.Recorded Live Data can serve as valuable information to help
you in the troubleshooting of vehicle problems.

There are two ways that the CanOBD2&1 Scan Tool can "record" Live Data:

■ Record by DTC Trigger

■ Record by Manual Trigger

If the POWER/LINK button is pressed at any time while
in Live Data mode, any stored (recorded) Live Data will be
cleared (erased) from the CanOBD2&1 Scan Tool’s memory.

Record by DTC Trigger

This function

automatically

records (captures) Live Data information
when a DTC sets and saves it in the CanOBD2&1 Scan Tool’s memo­ry.The recorded (captured) data can be a valuable troubleshooting aid,
particularly if you are experiencing a fault that is causing a DTC to set.

OBD2 Live Data Mode

RECORDING (CAPTURING) LIVE DATA

40 CanOBD2&1

E

1. With the CanOBD2&1 Scan Tool in "Live

Data" mode (see Viewing Live Data on
page 37 for details), press and hold the

ENTER/LD button until the "Mode
Selection Menu" appears.

2. Use the UP and DOWN but-

tons, as necessary, to highlight Live
Data Menu, then press the ENTER/LD

button.

■ The "Live Data Menu" displays.

3. Use the UP and DOWN but-

tons, as necessary, to highlight Record
Live Data, then press the ENTER/LD

button.

■ The "Record Live Data Menu" dis-

plays.

4. Use the UP and DOWN but-

tons, as necessary, to highlight Record

by DTC trigger, then press the
ENTER/LD button.

5. When the "Record by DTC Trigger" screen displays, select the

desired trigger point as follows:

The CanOBD2&1 Scan Tool is capable of recording approxi­mately 20 frames of Live Data. Record by DTC trigger lets
you select the point in time at which you wish the
CanOBD2&1 Scan Tool to begin recording Live Data. You can
set the trigger point to record the 20 frames of data before an
event (when the DTC sets), after the event, or in the middle
(10 frames before and 10 frames after the event.

■ Beginning - records approximately

20 frames of Live Data after the DTC
sets.

■ Middle - records approximately 10

frames of Live Data before and 10
frames after the DTC sets.

■ End - records appro ximately 20 frames

of Live Data before the DTC sets.

6. Use the UP and DOWN buttons, as necessary , to select the

desired trigger point, then press the ENTER/LD button.

OBD2 Live Data Mode

RECORDING (CAPTURING) LIVE DATA

CanOBD2&1 41

E

■ A "One moment please. . ." message

shows on the display. When the
CanOBD2&1 Scan Tool is ready to
record Live Data, the "Record Live
Data" screen displays.

7. Put the engine in the operating condition

that causes the DTC to set.

■ If necessary, drive the vehicle until you reach the vehicle speed

at which the problem occurs.

8. When the CanOBD2&1 Scan Tool detects a fault that causes a DTC

to set, it automatically records and saves approximately 20 frames
of Live Data information in its memory (according to your trigger
selection) for each PID supported by the vehicle.

■ All three LEDs will blink for three sec-

onds to indicate that Live Data is being
recorded, and a "One moment please..."
message shows on the display.

■ When recording is complete, a confir-

mation screen displays, asking if you
would like to view the recorded data.

Use the UP and DOWN but­tons, as necessary, to select Yes or
No, as desired, then press the

ENTER/LD button.

If Yes is selected, the
CanOBD2&1 Scan Tool enters
"Playback" mode from which you
can view a frame-by-frame playback of recorded Live Data
(see Live Data Playback on page 44 for details). If No is
selected, the display returns to the "Live Data View" mode.

9. You can exit the "Record Live Data Mode" at any time by pressing
and holding the ENTER/LD button until the "Mode Selection

Menu" displays.

If desired, you can transfer the recorded Live Data informa­tion to a personal computer using the optional PC-LINK pro­gram (see instructions included with PC-Link for more infor­mation).

Record by Manual Trigger

This option lets you select the precise time at which the Live Data
recording will occur.Record by Manual Trigger can be a very valuable
diagnostic tool when troubleshooting intermittent problems that do not
meet the requirements for a DTC to set. Even though a DTC is not
present, the intermittent problems will sometimes manifest themselves
briefly, for a few fractions of a second and/or only at certain vehicle
speeds or vehicle operating conditions.

OBD2 Live Data Mode

RECORDING (CAPTURING) LIVE DATA

42 CanOBD2&1

E

1. With the CanOBD2&1 Scan Tool in "Live
Data" mode (see Viewing Live Data on
page 37 for details), press and hold the

ENTER/LD button until the "Mode
Selection Menu" appears.

2. Use the UP and DOWN but-
tons, as necessary, to highlight Live
Data Menu, then press the ENTER/LD

button.

■ The "Live Data Menu" displays.

3. Use the UP and DOWN but-
tons, as necessary, to highlight Record
Live Data, then press the ENTER/LD

button.

■ The "Record Live Data Menu" dis-

plays.

4. Use the UP and DOWN buttons, as necessary, to highlight
Record by manual trigger, then press the ENTER/LD button.

5. When the "Record by Manual Trigger" screen displays, select the

desired trigger point as follows:

The CanOBD2&1 Scan Tool is capable of recording approxi­mately 20 frames of Live Data. Record by DTC trigger lets
you select the point in time at which you wish the
CanOBD2&1 Scan Tool to begin recording Live Data. You can
set the trigger point to record the 20 frames of data before an
event (when the DTC was set), after the event, or in the mid­dle (10 frames before and 10 frames after the event.

■ Beginning - records approximately

20 frames of Live Data after the
ENTER/LD button was pressed.

■ Middle - records approximately 10

frames of Live Data before and 10
frames after the ENTER/LD but-

ton was pressed.

■ End - records approximately 20 frames of Live Data before the

ENTER/LD button was pressed.

6. Use the UP and DOWN buttons, as necessary, to select the
desired trigger point, then press the ENTER/LD button.

OBD2 Live Data Mode

RECORDING (CAPTURING) LIVE DATA

CanOBD2&1 43

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■ A "One moment please. . ." message

shows on the display. When the
CanOBD2&1 Scan Tool is ready to
record Live Data, the "Record Live
Data" screen displays.

7. Put the engine in the operating condition
where the problem manifests itself.

■ If necessary, drive the vehicle until you reach the vehicle speed

at which the problem occurs.

8. When the problem occurs, press and
release the ENTER/LD button.

■ All three LEDs will blink for three sec-

onds to indicate that Live Data is
being recorded, and a "One moment
please. . ." message shows on the
display.

■ When recording is complete, a confir-

mation screen displays, asking if you
would like to view the recorded data.

Use the UP and DOWN but­tons, as necessary, to select Yes or
No, as desired, then press the

ENTER/LD button.

If Yes is selected, the CanOBD2&1 Scan Tool enters
"Playback" mode from which you can view a frame-by-frame
playback of recorded Live Data (see Live Data Playback on
page 44 for details). If No is selected, the display returns to
the "Live Data View" mode.

9. You can exit the "Record Live Data Mode" at any time by pressing
and holding the ENTER/LD button until the "Mode Selection

Menu" displays.

If desired, you can transfer the recorded Live Data information
to a personal computer using the optional PC-LINK program
(see instructions included with PC-Link for more information).

Important Information

1. When Live Data capture is complete, the green, yellow and red LEDs

on the CanOBD2&1 Scan Tool will flash four times to indicate that
Live Data is being saved to the CanOBD2&1 Scan Tool's memory.

2. When you are LINKED to a vehicle and you are in the “Live Data
View mode”, you can toggle between “Live Data View” mode and
“DTC view” mode by alternately pressing and releasing the DTC

OBD2 Live Data Mode

LIVE DATA PLAYBACK

44 CanOBD2&1

E

SCROLL or the ENTER/LD buttons. The CanOBD2&1
Scan Tool will stay linked to the vehicle’s computer during this

process.However, if the DTC SCROLL button is pressed twice
the DTC screen will be advanced to the next DTC screen and the
CanOBD2&1 Scan Tool will be taken out of link.

LIVE DATA PLAYBACK

Once Live Data has been recorded, it is saved in the CanOBD2&1
Scan Tool's memory. You can view recorded Live Data immediately
after recording by selecting Yes from the Record Live Data confirma­tion screen (see Recording Live Data on page 39 for more informa­tion), or you can view it later using the "Playback" function.

1. If the Code Reader

is connected

to a vehicle:

■ With the CanOBD1&1 Scan Tool in

"Live Data" mode (see Viewing Live
Data on page 37 for details), press and

hold the ENTER/LD button until
the "Mode Selection Menu" appears.

■ Use the the UP and DOWN

buttons, as necessary, to highlight

Live Data Menu, then press the
ENTER/LD button. The "Live

Data Menu" displays.

■ Use the UP and DOWN but-

tons, as necessary, to highlight

Playback Live Data, then press the
ENTER/LD button.

2. If the Code Reader

is not connected

to

a vehicle:

■ With the CanOBD2&1 Scan Tool not

connected to a vehicle, press the
POWER/LINK button. The “To

Link” screen shows on the
CanOBD2&1 Scan Tool’s display.

Press the DOWN button for
instructions to view DTCs in memory.

■ Press the ENTER/LD button.

The “Select OBD System” screen dis­plays.

OBD2 Live Data Mode

LIVE DATA PLAYBACK

CanOBD2&1 45

E

■ Use the UP and DOWN but-

tons, as necessary, to highlight OBD2
Vehicle, then press the ENTER/LD

button. The display shows the
first DTC stored in the CanOBD2&1
Scan Tool’s memory .

■ Press the ENTER/LD button to place the CanOBD2&1 Scan

Tool in "Live Data Playback" mode.

3. The display shows the recorded Live Data, beginning with the "trigger"
frame.

When you select Yes from the
Record Live Data confirmation
screen, the CanOBD2&1 Scan Tool
enters the "Live Data Playback"
mode, and the display shows the
recorded Live Data, beginning with
the "trigger" frame.

■ A vehicle usually supports several PIDs, however, only a limited

amount of PID data can be displayed on the screen at one time.
If additional PID data is available , a small arrow will be shown on

the display. Use the UP and DOWN buttons, as neces­sary, to scroll up or down to view all available PID data.

■ When viewing recorded Live Data, look for any irregularities in

any of the PID values/signal information (LTFT %, RPM, MAP,
TEMP, etc.). If any PIDs are not within specification, or irregular­ities are detected, follow the procedures in the vehicle's service
repair manual to perform additional troubleshooting and repair.

When recorded Live Data is
played back, all available PIDs are
shown, even if you have cus­tomized the Live Data selections.

If there is no Live Data currently
stored in the CanOBD2&1 Scan
Tool's memory, an advisory mes-

sage shows on the display. Press the DTC SCROLL but­ton to exit the "Live Data Playback" mode.

4. When you have viewed all PID information for the current frame of
Live Data, use the DOWN button to scroll to the end of the PID

list.Highlight Next Frame or Pre vious Frame, as desired, then press
the ENTER/LD button.

5. When you have finished viewing the recorded Live Data, exit the
“Live Data Playback”mode using the appropriate procedure shown
below:

Generic (Global) OBD2 PID List

46 CanOBD2&1

E

■ If the Code Reader

is connected

to a vehicle, use the DO WN

button to scroll to the end of the PID list, highlight Exit Playback,
then press the ENTER/LD button.

■ If the Code Reader

is not connected

to a vehicle, press the DTC

SCROLL button.

The following is a list of Generic (Global) PIDs and their descriptions.

Tool
Display Unit Value PID Description

ACC Pedal D % XXX.X Accelerator Pedal Position D
ACC Pedal E % XXX.X Accelerator Pedal Position E
ACC Pedal F % XXX.X Accelerator Pedal Position F
Air Status - UPS, DNS, Commanded Secondary Air

OFF Status
Ambient *C / *F XXX Ambient Air Temperature
Aux Input Status - On / Off Auxiliary Input Status
BARO kPa / XXX / XX.X Barometric Pressure

inHg
Calc LOAD % XXX.X Calculated LOAD Value
CAT Temp 11 *C / *F XXXX.X Catalyst Temperature Bank 1-

Sensor 1

CAT Temp 12 *C / *F XXXX.X Catalyst Temperature Bank 1-

Sensor 2

CAT Temp 21 *C / *F XXXX.X Catalyst Temperature Bank 2-

Sensor 1

CAT Temp 22 *C / *F XXXX.X Catalyst Temperature Bank 2-

Sensor 2

Command % XXX.X Commanded EGR
EGR

Command % XXX.X Commanded Evaporative Purge
EVAP

Command TAC % XXX.X Commanded Throttle Actuator
Dist DTC Clr km / XXXXX Distance since DTC Cleared

mile

Dist MIL ON km / XXXXX Distance Traveled while MIL ON

miles
ECT *C / *F XXX / XXX Engine Coolant Temp
ECU V olts V XX.XXX Control Module Voltage
EGR Error % XXX.X EGR Error
Eng RPM min XXXXX Engine RPM
EQ Ratio - X.XXX Commanded Equivalence Ratio

CanOBD2&1 47

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Generic (Global) OBD2 PID List

Tool
Display Unit Value PID Description

EQ Ratio 11 - X.XXX Bank 1 - Sensor 1 Equivalence

Ratio

EQ Ratio 12 - X.XXX Bank 1 - Sensor 2 Equivalence

Ratio

EQ Ratio 13 - X.XXX Bank 1 - Sensor 3 Equivalence

Ratio

EQ Ratio 14 - X.XXX Bank 1 - Sensor 4 Equivalence

Ratio

EQ Ratio 21 - X.XXX Bank 2 - Sensor 1 Equivalence

Ratio

EQ Ratio 22 - X.XXX Bank 2 - Sensor 2 Equivalence

Ratio

EQ Ratio 23 - X.XXX Bank 2 - Sensor 3 Equivalence

Ratio

EQ Ratio 24 - X.XXX Bank 2 - Sensor 4 Equivalence

Ratio

EVAP Press Pa / XXXX.XX / Evap System Vapor Pressure

in H2O XX.XXX

FP / Vac kPa / XXXX.XXX / Fuel Rail Pressure relative to

PSI XXX.X Vacuum
Fuel Level % XXX.X Fuel Level Input
Fuel Press kPa / XXX / XX.X Fuel Rail Pressure

PSI
Fuel Press kPa / XXXXX / Fuel Rail Pressure

PSI XXXX.X
Fuel Sys 1 - OL Fuel System 1 Status
Fuel Sys 1 - CL Fuel System 1 Status
Fuel Sys 1 - OL-Dr ive Fuel System 1 Status
Fuel Sys 1 - OL-Fault Fuel System 1 Status
Fuel Sys 1 - CL-Fault Fuel System 1 Status
Fuel Sys 2 - OL Fuel System 2 Status
Fuel Sys 2 - CL Fuel System 2 Status
Fuel Sys 2 - OL-Dr ive Fuel System 2 Status
Fuel Sys 2 - OL-Fault Fuel System 2 Status
Fuel Sys 2 - CL-Fault Fuel System 2 Status
IAT *C / *F XXX / XXX Intake Air Temperature
LOAD V alue % XXX.X Absolute Load Value
LTFT B1 % XXX.X Long Term Fuel Tr im-Bank 1
LTFT B2 % XXX.X Long Term Fuel Tr im-Bank 2

48 CanOBD2&1

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Generic (Global) OBD2 PID List

Tool
Display Unit Value PID Description

LTFT B3 % XXX.X Long Term Fuel Tr im-Bank 3
LTFT B4 % XXX.X Long Term Fuel Tr im-Bank 4
MAF g/s ; XXX.XX / Air Flow Rate from Mass Air

lb/min XXXX.X Flow Sensor

MAP kPa / XXX / XX.X Intake Manifold Absolute Pressure

PSI
MIL On Time hrs, min XXXX, XX Engine Run Time while MIL ON
Monitor Status - ICONS on Monitor Status this Dr iving Cycle

Display
O2S B1 S1 V X.XXX Bank 1 - Sensor 1
O2S B1 S1 mA mA X.XXX Bank 1 - Sensor 1 O2S Current
O2S B1 S1 V V X.XXX Bank 1 - Sensor 1 O2S Voltage
O2S B1 S2 V X.XXX Bank 1 - Sensor 2
O2S B1 S2 mA mA X.XXX Bank 1 - Sensor 2 O2S Current
O2S B1 S2 V V X.XXX Bank 1 - Sensor 2 O2S Voltage
O2S B1 S3 V X.XXX Bank 1 - Sensor 3
O2S B1 S3 mA mA X.XXX Bank 1 - Sensor 3 O2S Current
O2S B1 S3 V V X.XXX Bank 1 - Sensor 3 O2S Voltage
O2S B1 S4 V X.XXX Bank 1 - Sensor 4
O2S B1 S4 mA mA X.XXX Bank 1 - Sensor 4 O2S Current
O2S B1 S4 V V X.XXX Bank 1 - Sensor 4 O2S Voltage
O2S B2 S1 V X.XXX Bank 2 - Sensor 1
O2S B2 S1 mA mA X.XXX Bank 2 - Sensor 1 O2S Current
O2S B2 S1 V V X.XXX Bank 2 - Sensor 1 O2S Voltage
O2S B2 S2 V X.XXX Bank 2 - Sensor 2
O2S B2 S2 mA mA X.XXX Bank 2 - Sensor 2 O2S Current
O2S B2 S2 V V X.XXX Bank 2 - Sensor 2 O2S Voltage
O2S B2 S3 V X.XXX Bank 2 - Sensor 3
O2S B2 S3 mA mA X.XXX Bank 2 - Sensor 3 O2S Current
O2S B2 S3 V V X.XXX Bank 2 - Sensor 3 O2S Voltage
O2S B2 S4 V X.XXX Bank 2 - Sensor 4
O2S B2 S4 mA mA X.XXX Bank 2 - Sensor 4 O2S Current
O2S B2 S4 V V X.XXX Bank 2 - Sensor 4 O2S Voltage
O2S Location - O2S11 Oxygen Sensor, Bank 1, Sensor 1
O2S Location - O2S12 Oxygen Sensor, Bank 1, Sensor 2
O2S Location - O2S13 Oxygen Sensor, Bank 1, Sensor 3
O2S Location - O2S14 Oxygen Sensor, Bank 1, Sensor 4
O2S Location - O2S21 Oxygen Sensor, Bank 2, Sensor 1

CanOBD2&1 49

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Generic (Global) OBD2 PID List

Tool
Display Unit Value PID Description

O2S Location - O2S22 Oxygen Sensor, Bank 2, Sensor 1
O2S Location - O2S23 Oxygen Sensor, Bank 2, Sensor 3
O2S Location - O2S24 Oxygen Sensor, Bank 2, Sensor 4
O2S Location - O2S11 Oxygen Sensor, Bank 1, Sensor 1
O2S Location - O2S12 Oxygen Sensor, Bank 1, Sensor 2
O2S Location - O2S21 Oxygen Sensor, Bank 2, Sensor 1
O2S Location - O2S22 Oxygen Sensor, Bank 2, Sensor 2
O2S Location - O2S31 Oxygen Sensor, Bank 3, Sensor 1
O2S Location - O2S32 Oxygen Sensor, Bank 3, Sensor 2
O2S Location - O2S41 Oxygen Sensor, Bank 4, Sensor 1
O2S Location - O2S42 Oxygen Sensor, Bank 4, Sensor 2
OBD Support - OBD2 OBD Requirements
OBD Support - OBD OBD Requirements
OBD Support - OBD and OBD Requirements

OBD2
OBD Support - OBD 1 OBD Requirements
OBD Support - No OBD OBD Requirements
OBD Support - EOBD OBD Requirements
OBD Support - EOBD and OBD Requirements

OBD2
OBD Support - EOBD and OBD Requirements

OBD

OBD Support - EOBD, OBD OBD Requirements

and OBD2
OBD Support - JOBD OBD Requirements
OBD Support - JOBD and OBD Requirements

OBD2

OBD Support - JOBD and OBD Requirements

EOBD

OBD Support - JOBD, EOBD OBD Requirements

and OBD2
PTO Status - On / Off Power Take Off Status
Rel TPS % XXX.X Relative Throttle Position
Spark Adv deg XX Ignition Timing Advance #1

Cylinder
STFT B1 % XXX.X Short Term Fuel Trim-Bank 1
STFT B1 S1 % XXX.X Bank 1 - Sensor 1
STFT B1 S2 % XXX.X Bank 1 - Sensor 2
STFT B1 S3 % XXX.X Bank 1 - Sensor 3

50 CanOBD2&1

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Generic (Global) OBD2 PID List

Tool
Display Unit Value PID Description

STFT B1 S4 % XXX.X Bank 1 - Sensor 4
STFT B2 % XXX.X Short Term Fuel Trim-Bank 2
STFT B2 S1 % XXX.X Bank 2 - Sensor 1
STFT B2 S2 % XXX.X Bank 2 - Sensor 2
STFT B2 S3 % XXX.X Bank 2 - Sensor 3
STFT B2 S4 % XXX.X Bank 2 - Sensor 4
STFT B3 % XXX.X Short Term Fuel Trim-Bank 3
STFT B4 % XXX.X Short Term Fuel Trim-Bank 4
Time DTC Clr hrs, min XXXX, XX Time since DTC Cleared
Time Since sec XXXX Time Since Engine Start

Start
TPS % XXX.X Absolute Throttle Position
TPS B % XXX.X Absolute Throttle Position B
TPS C % XXX.X Absolute Throttle Position C
Veh Speed km/h / XXX / XXX Vehicle Speed Sensor

mph

Warm-up DTC - XXX # Warm-ups since DTC Cleared
Clr

CanOBD2&1 51

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Additional OBD2 Tests

O2 SENSOR TEST

In addition to retrieving Diagnostic Trouble Code (DTC) and viewing
Live Data, you can use the CanOBD2&1 Scan Tool to perform addi­tional diagnostic tests, and to view diagnostic and vehicle information
stored in your vehicle's on-board computer.

Additional tests are accessed through the
"Mode Selection Menu." To access the
"Mode Selection Menu", place the
CanOBD2&1 Scan Tool in "Live Data"
mode (see Viewing Live Data on page 37
for details), then press and hold the

ENTER/LD button until the "Mode
Selection Menu" appears.

The following functions are available from the "Mode Selection Menu":

■ Live Data Menu - Displays the "Live Data Menu" from which you

can choose to record, customize and play back Live Data (see the
Live Data Mode section beginning on page 37 for more informa­tion)

■ O2 Sensor Test - Retrieves and displays O2 sensor monitor test

results from your vehicle's on-board computer.

■ Non-Continuous Test - Retrieves and displays test results for

emission-related powertrain components and systems that are not
continuously monitored.

■ System Test - Performs a leak test for the vehicle's EVAP system.

■ Vehicle ID - Retrieves the vehicle's VIN number, calibration ID(s)

and other related information, and lets you view a listing of av ailable
modules for the vehicle.

O2 SENSOR TEST

OBD2 regulations require that applicable vehicles monitor and test
operation of the oxygen (O2) sensors to identify problems that can
affect fuel efficiency and vehicle emissions.These tests are performed
automatically when engine operating conditions are within predefined
limits. Results of these tests are stored in the on-board computer's
memory.

The O2 Sensor Test function lets you retrieve and view O2 sensor
monitor test results for the most recently completed tests from your
vehicle's on-board computer.

Vehicles are equipped with multiple O2 sensors. O2 sensors are
installed both upstream of (before) and downstream of (after) the
exhaust system Catalytic Converters.The name of an O2 sensor iden­tifies its location in the exhaust system.The name of each O2 sensor
is made up of three parts:

O2S XX YY

-or-

O2S X Y

■ O2S -this is the basic designation for

all

O2 sensors.

52 CanOBD2&1

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Additional OBD2 Tests

O2 SENSOR TEST

■ X or XX - These characters identify the location of the O2 sensor in

relation to a cylinder bank.An O2 sensor for cylinder bank 1 is iden­tified by the designation “1” or "B1"; a sensor for cylinder bank 2 is
identified as “2” or "B2."

”Bank One” indicates the side of the engine where cylinder
number one is located (V-type engines). Bank Two is oppo­site of Bank One.

■ Y orYY - These characters identity the location of the O2 sensor in rela-

tion to the exhaust system catalyst.An O2 sensor located upstream of
the catalyst is identified by the designation”1”or "S1", a sensor located
downstream of the Catalytic Converter is identified as “2”or "S2."

For example, O2S12 or O2SB1S2 is the designation for the down­stream O2 sensor for cylinder bank 1.

The CanOBD2&1 Scan Tool does not perform O2 sensor
tests, but retrieves results from the most recently performed
O2 sensor tests from the on-board computer's memory. You
may retrieve O2 sensor test results for only one test of one
sensor at any given time.

1. From the "Mode Selection Menu", use
the UP and DOWN buttons, as

necessary, to highlight O2 Sensor Test,
then press the ENTER/LD button.

■ The "Select Sensor" screen displays.

The screen shows all O2 sensors
applicable to the vehicle under test.

If O2 sensor tests are not support­ed by the vehicle under test, an
advisory message shows on the
CanOBD2&1 Scan Tool's display.
Press the ENTER/LD button
to return to "Live Data" mode.

2. Use the UP and DOWN but-
tons, as necessary, to highlight the O2
sensor for which you wish to view test

results, then press the ENTER/LD
button.

3. When test results have been retrieved,
results of the first test for the selected
sensor will show on the CanOBD2&1
Scan Tool's display .

4. Use the UP and DOWN but-
tons, as necessary, to view results for
additional tests.

CanOBD2&1 53

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Additional OBD2 Tests

NON-CONTINUOUS TEST

5. When you have finished viewing the

retrieved test data, scroll to the end of
the display to select Exit, then press the

ENTER/LD button to return to the
"Select Test" screen.

NON-CONTINUOUS TEST

The Non-Continuous Test function retrieves and displays test results
for emission-related powertrain components and systems that are not
continuously monitored. The tests available are determined by the
vehicle manufacturer.

The CanOBD2&1 Scan Tool does not perform non-continu­ous test, but retrieves results from the most recently per­formed tests from the on-board computer’s memory. You may
retrieve non-continuous test results for only one test at any
given time.

1. From the "Mode Selection Menu", use the
UP and DOWN buttons, as nec-

essary, to highlight Non-Contin uous Test,
then press the ENTER/LD button.

■ The “Select Test” screen displays.

The screen shows all tests applicable
to the vehicle under test. Refer to the
vehicle’s service repair manual for
infor-mation related to non-continu­ous tests.

If non-continuous tests are not
supported by the vehicle under
test, an advisory message shows
on the CanOBD2&1 Scan Tool's
display. Press the ENTER/LD

button to return to the Mode

Selection menu.

2. Use the UP and DOWN but-
tons, as necessary, to highlight the
desired test, then press the ENTER/LD

button.

3. A “One moment please. . .” message diplays while the request is
sent to the vehicle’s on-board computer.

4. When test results have been retrieved, data f or the selected test will show
on the CanOBD2&1 Scan Tool’s display.The display shows the follow­ing information:

54 CanOBD2&1

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Additional OBD2 Tests

SYSTEM TEST

■ Test ID number

■ Module ID number

■ Component ID number

■ Min or Max test limit

Only one test limit, either Min
or Max, is shown for any given
test.

■ Test V alue and status

Status is calculated by the CanOBD2&1 Scan Tool by
comparing the Test Value against the displayed test limit
(either Min or Max). Status is shown as either Low, High
or OK.

5. When you have finished viewing the retrieved test data, scroll to the
end of the display to select Exit, then press the ENTER/LD

button to return to the “Select Test” screen.

SYSTEM TEST

The System Test function lets you initiate a leak test for the vehicle's
EVAP system.

The CanOBD2&1 Scan Tool does not perform the leak test,
but signals the vehicle's on-board computer to initiate the test.
The vehicle manufacturer determines the criteria and method
for stopping the test once it has been started. BEFORE using
the System Test function, refer to the vehicle's service repair
manual to determine the procedures necessary to stop the
test.

1. From the "Mode Selection Menu", use
the UP and DOWN buttons as

necessary, to highlight System Test,
then press the ENTER/LD button.

■ The "System Test Menu" displays.

2. Use the UP and DOWN but­tons, as necessary, to highlight EVAP
Leak Test, then press the ENTER/LD

button.

3. A "One moment please..." message dis­plays while the request is sent to the
vehicle's on-board computer.

CanOBD2&1 55

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Additional OBD2 Tests

VEHICLE ID

Some vehicle manufacturers do
not allow CanOBD2&1 Scan Tools
or other external devices to con­trol vehicle systems. If the EVAP
Leak Test is not supported by the
vehicle under test, an advisory
message shows on the
CanOBD2&1 Scan Tool's display.
Press the ENTER/LD button
to return to the System Test menu.

4. When the EVAP leak test has been initi­ated by the vehicle's on-board comput­er, a confirmation message shows on
the CanOBD2&1 Scan Tool's display.

Press the ENTER/LD button to
return to the “Select Test” screen.

VEHICLE ID

The Vehicle ID function offers two options for retrieving reference
information for the vehicle under test; Vehicle ID and Available

Modules.

Retrieving Vehicle ID Information

The Vehicle ID function is applicable to model year 2000 and
newer OBD2-compliant vehicles.

The CanOBD2&1 Scan Tool can retrieve a list of information (provided
by the vehicle manuf acturer),

unique

to the vehicle under test, from the

vehicle's on-board computer.This information may include:

■ The vehicle's VIN number

■ The control module identification number

■ The vehicle's calibration ID(s).These IDs

uniquely

identify the soft-

ware version(s) for the vehicle's control module(s).

■ The Vehicle's Calibration Verification Number(s) (CVNs) required

by ODB2 regulations. CVNs are used to determine if emission­related calibrations for the vehicle under test have been changed.
One or more CVNs may be returned by the vehicle's computer.

1. From the "Mode Selection Menu", use
the UP and DOWN buttons, as

necessary, to highlight Vehicle ID, then
press the ENTER/LD button.

■ The "Vehicle Information Menu" dis-

plays.

56 CanOBD2&1

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Additional OBD2 Tests

VEHICLE ID

If the Vehicle ID function is not
supported by the vehicle under
test, an advisory message shows
on the CanOBD2&1 Scan Tool's
display. Press the ENTER/LD

button to return to the Mode

Selection menu.

2. Use the UP andDOWN buttons,
as necessary, to highlight Vehicle ID,

then press the ENTER/LD button.

3. A "One moment please..." message dis­plays while the requested information is
retrieved from the vehicle's computer.

The first time the Vehicle IDfunction is used, it may take sev­eral minutes to retrieve the information from the vehicle's
computer

.

4. When the retrieval process is complet­ed, the vehicle ID information is shown
on the CanOBD2&1 Scan Tool's display.

Use the UP and DOWN but­tons, as necessary, to view the entire
list.

5. When you have finished viewing the
retrieved vehicle ID information, press the ENTER/LD button

to return to "Live Data" mode.

Viewing Available Modules

The CanOBD2&1 Scan Tool can retrieve a list of modules supported
by the vehicle under test.

1. From the "Mode Selection Menu", use
the UP and DOWN buttons, as

necessary, to highlight Vehicle ID, then
press the ENTER/LD button.

■ The "Vehicle Information Menu" dis-

plays.

If the Vehicle ID function is not
supported by the vehicle under
test, an advisory message shows
on the CanOBD2&1 Scan Tool's
display. Press the ENTER/LD

button to return to "Live

Data" mode.

CanOBD2&1 57

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Additional OBD2 Tests

VEHICLE ID

2. Use the UP andDOWN buttons,
as necessary, to highlight Available
Modules, then press the ENTER/LD

button.

3. A "One moment please..." message dis­plays while the requested information is
retrieved from the vehicle's computer.

4. When the retrieval process is complet­ed, a complete list of modules support­ed by the vehicle under test is shown on
the CanOBD2&1 Scan Tool's display.

Use the UP and DOWN but­tons, as necessary, to view the entire
list.

5. When you have finished viewing the list of available modules, press
the ENTER/LD button to return to "Live Data" mode.

58 CanOBD2&1

E

Chrysler/Jeep OBD1 Systems

CHRYSLER/JEEP OBD1 SYSTEMS

CHRYSLER/JEEP OBD1 SYSTEMS

Chrysler Motors On-Board Computer Systems

Chrysler Motors introduced its first electronic fuel injected vehicle in
late 1983. The on-board computer management systems used on
Chrysler vehicles have evolved over the years, and their names have
changed accordingly.

1983-87: The on-board computer used in these vehicles is a split­system, composed of two separate units: the Logic Module and the
Power Module. The Logic Module contains a microprocessor which
processes data received from sensors located throughout the vehicle
and makes decisions (based on these inputs) which effect engine
operation.The Logic Module is usually located on the right-hand side,
behind the kick panel.The Power Module supplies operating power to
the Logic Module, and contains the circuits which control the high­current devices. Power Module operation is controlled by the Logic
Module.The Power Module is located in the engine compartment, near
the vehicle’s battery.

1987-90: This system is called a Single Module Engine Controller
(SMEC). This system still uses two separate circuit boards (Logic
Module and Power Module).However, both circuit boards are located
in a common enclosure.

1989-95: This system is called a Single Board Engine Controller
(SBEC). On this system, the Logic Module and Power Module circuit
boards are integrated on a single circuit board.

1993-97: Beginning in 1993, the computer was renamed the
Powertrain Control Module (PCM).In addition to controlling the engine
management system and emission system, the computer also takes an
active role in controlling powertrain (transmission system) operation.

Unless otherwise specified, all references to “computer” within
this manual also apply to “Logic Module/ Power Module”,
“SMEC”, “SBEC” or “PCM”.

Jeep On-Board Computer Systems

1993-95: In 1993, Jeep on-board computer systems (fuel injected

vehicles only) were converted to the Chrysler on-board computer sys­tems. All 1993 through 1995 fuel injected Jeep and Chrysler vehicles
are equipped with similar on-board computer systems.

CanOBD2&1 59

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Chrysler/Jeep OBD1 Systems

VEHICLES COVERED / PANEL INDICATOR LIGHTS / DLC

VEHICLES COVERED

This section covers Chrysler fuel injected vehicles from 1983-1995.

INSTRUMENT PANEL INDICATOR LIGHTS

Your vehicle’s instrument panel has either a “Power Loss”, “Check
Engine” or “Malfunction Indicator Lamp”, depending on the year of the
vehicle.These lights are designed to warn you of component malfunc­tions.

If your instrument panel indicator lights do not come on when
you turn on the ignition, please refer to your vehicle’s service
manual. You may have problems in the car’s circuitry. It is rec­ommended that you fix these problems before retrieving
DTC’s from your vehicle’s computer.

DATA LINK CONNECTOR (DLC)

Chrysler vehicles are equipped with spe­cial test connectors that make it possible to
connect specialized testing equipment that
communicates with the vehicle’s on-board
computer. Chrysler’s vehicle test connec­tors are usually dark in color (BLACK or
GREY) and are located under the hood.

Model

Type Year Model

Passenger 1983-1995 Chrysler, Dodge and Plymouth Fuel
Cars Injected Models Only (Excluding

Lasor/Talon 1.8L, 2.0L (ALL YEARS),
1990 Monaco/Premier)

Light Truck 1987-1995 Chrysler, Dodge and Plymouth Fuel
and Vans Injected Models Only

1992-1995 Diesel Models

Jeep 1993-1995 Jeep Fuel Injected Models Only

POWER

LOSS

CHECK

ENGINE

MALFUNCTION

INDICATOR

LAMP

60 CanOBD2&1

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Chrysler/Jeep OBD1 Systems

CODE RETRIEVAL PROCEDURE

CODE RETRIEVAL PROCEDURE

Never replace a par t based only on the DTC definition.

Each DTC has a set of testing procedures, instructions and
flow charts that must be followed to confirm the location of
the problem.This information is found in the vehicle’s service
manual. Always refer to the vehicle’s service manual for
detailed testing instructions.

Check your vehicle thoroughly before performing any test.
See Before Y ou Begin on page 18 for details.

ALWAYS observe safety precautions whenever working on a
vehicle.See Safety Precautions on page 3 for more informa­tion.

1. Locate the vehicle’s Data Link Connector (DLC). See Data Link
Connector (DLC) on page 59 for connector location.

Some DLCs have a plastic cover that must be removed
before connecting the CanOBD2&1 Tool’s cable connector.

2. Connect the CanOBD2&1 Scan Tool
cable (with the Chrysler Connector
Cable Adaptor attached) to the
CanOBD2&1 Scan Tool, then connect
the adaptor to the vehicle’s DLC. Press

the POWER/LINK button to tur n
the CanOBD2&1 Scan Tool ON.

■ Set the parking brake, and make sure

all vehicle accessories are turned off.

3. Turn the ignition ON. DO NOT star t the
engine. Press the ENTER/LD but-

ton to continue.

4. Select the model year of the vehicle
from which you wish to retrieve codes:

If a previous vehicle selection is currently saved in the
CanOBD2&1 Scan Tool's memory, the "Current Selection/
Select New Vehicle" menu displays. If no previous vehicle
selection is stored in the CanOBD2&1 Scan Tool's memory,
the "Select Vehicle Year" menu displays.Use the and
buttons, as necessary, to make your selection.

Retrieving and using Diagnostic Trouble Codes (DTCs) for

troubleshooting vehicle operation is only one part

of an overall diagnostic strategy.

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Chrysler/Jeep OBD1 Systems

CODE RETRIEVAL PROCEDURE

■ To retrieve DTCs from the vehicle selection currently in the

CanOBD2&1 Scan Tool’s memory:

- From the “Current Selection/
Select New Vehicle” screen, high­light Current Selectionand press
the ENTER/LD button.

- Proceed to step 5 to continue.

■ To retrieve DTCs from a new vehicle:

- From the “Current Selection/
Select New Vehicle” screen, high­light Select New Vehicle and
press the ENTER/LD button;
the “Select V ehicle Year” menu dis­plays.

- Highlight the desired year, then press the ENTER/LD
button. The “Current Selection/Select New Vehicle” screen
displays for your confirmation.

FCC - means 1994 Four Cylinder Control Module for
the 1994 Chrysler vehicles.

- If the year shown in the “Current Selection” field is correct,
highlight Current Selection and press the ENTER/LD
button. Proceed to step 5 to continue.

If the year shown is not correct, highlight Select New
Vehicle and press the ENTER/LD buttonto return
to the “Select Vehicle Year” menu to make your correc­tions.

5. Prepare the vehicle to retrieve codes:

■ For 1988-1995 Chrysler/Jeep vehicles: The CanOBD2&1

Scan Tool will automatically begin the code retrieval process.
Proceed to step 6 to continue.

■ For 1984-1988 Chrysler vehicles ONL Y: WITHOUT starting the

engine, turn ignition ON, OFF, ON, OFF and ON again within 5
seconds to activate the code retrieval process. Proceed to step
6 to continue.

6. When the CanOBD2&1 Scan Tool is in
the process of retrieving codes, a “One
Moment Please...” message shows on
the CanOBD2&1 Scan Tool’s display.

62 CanOBD2&1

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Chrysler/Jeep OBD1 Systems

CODE RETRIEVAL PROCEDURE

■ If the CanOBD2&1 Scan Tool fails to

link to the vehicle’s computer, a
“Vehicle is not responding” message
shows on the CanOBD2&1 Scan
Tool’s display. Do the following:

- Verify the ignition is ON.

- Check the cable connections at
the CanOBD2&1 Scan Tool and at
the vehicle’s DLC.

- Turn the ignition OFF, wait 10-12 seconds, then turn back ON
to reset the computer.

- Press the ENTER/LD button and repeat steps 4 through
6 as necessary.

7. If the CanOBD2&1 Scan Tool was able
to link to the vehicle successfully a
"Code retrieval was successful..." mes­sage shows temporarily on the
CanOBD2&1 Scan Tool’s display fol­lowed by any retrieved DTCs.

■ The CanOBD2&1 Scan Tool will dis-

play a code only if codes are present
in the vehicle's computer memory. If
no codes are present, a "No DTC's
are presently stored in the vehicle's
computer" message is displayed.

8. If more than one code was retrieved
press the DTC SCROLL button, as
necessary, to display additional codes
one at a time.

In the case of long code definitions, a small arrow is shown
in the upper/lower right-hand corner of the code display area
to indicate the presence of additional information. Use the

and buttons, as necessary, to view the additional

information.

9. Disconnect the CanOBD2&1 Scan Tool from the vehicle and turn
the ignition key OFF.

10.To prolong battery life, the CanOBD2&1 Scan Tool automatically
shuts "Off" after approximately three minutes of no button activity.
The DTCs retrieved will remain in the CanOBD2&1 Scan Tool's
memory, and may be viewed at any time. If the CanOBD2&1 Scan
Tool’s batteries are removed, or if the CanOBD2&1 Scan Tool is re­linked to a vehicle to retrieve codes, any prior codes in its memory
are automatically cleared.

■ See Viewing DTCs in the CanOBD2&1 Scan Tool’s Memory

on page 14 to view DTCs stored in the CanOBD2&1 Scan Tool’s
memory.

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Chrysler/Jeep OBD1 Systems

CODE RETRIEVAL PROCEDURE

11.Follow the testing and repair procedures outlined in the vehicle's

service repair manual to correct "hard" DTCs. Codes should be
addressed and eliminated in the order they were received, erasing
(see Erasing DTC's on page 102) and retesting after each repair is
made to be sure the fault was eliminated.

The green, yellow and red LEDs are used (with the LCD dis­play) as visual aids to make it easier to determine engine sys­tem conditions. See Servicing Diagnostic Trouble Codes
on page 100 for information on interpreting LEDs and servic­ing DTCs.

64 CanOBD2&1

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Ford OBD1 Systems

FORD COMPUTER SYSTEM OVERVIEW - VEHICLES COVERED

FORD COMPUTER SYSTEM OVERVIEW

The CanOBD2&1 Scan Tool is compatible only with EEC-IV
Computer Control systems.

IMPORTANT: When the computer is in Self-Test mode (is
testing the sensors or actuators for proper operation), it relies
on voltage signals that is sends to and / or receives from the
sensors or actuators to determine whether or not these com­ponents are operating properly. The sensors and actuators
are all connected to the computer by wires.If any defects are
present in any part of the circuit that connects these devices
to the computer (such as defective connectors or wires, f aulty
grounds, improper voltage, shorts etc.), the voltage signal
that the computer receives from these devices will be affect­ed. The computer has no way of determining if the improper
voltage signal is being caused by a defect in the circuit or by
the sensors or actuators themselves.Keep this in mind when
servicing fault codes, and do not replace any devices (sen­sors or actuators) before checking the complete circuit (or cir­cuits) that are part of the device from which the code was
generated.

VEHICLES COVERED

CAR - Ford, Lincoln, Mercury Computer System/Tool Application
Table

The following table lists the y ear and model of all the cars that are co v­ered by the CanOBD2&1 Scan Tool.

Fuel Systems

8th VIN (Carburetor Computer

Engine Digit** Model) Application/Special Notes System

1981-1982

1.6L I-4 5, 2 EFI, EFI Turbo Escort, EXP, LN7, Lynx EEC-IV

2.3L I-4 5 EFI Turbo Capr i, Cougar, Mustang, T-Bird

2.3L I-4 HSC R, J FBC (6149)* Capri, Fairmont, LTD, Marquis,
Mustang, T empo , Topaz, Zephyr

1984-1986

1.6L I-4 4, 5 EFI Escor t, EXP, Lynx EEC-IV

8 EFI T urbo

2.3L I-4 A, J, R FBC Capri, Cougar, LTD, Marquis,

2.3L I-4 OHC (YFA)* (6149)* Mustang, Tempo, Topaz

2.3L I-4 T, W EFI Turbo Capri, Cougar, Merkur XR4Ti,
Mustang, T-Bird

2.3L I-4 HSC S, X CFI Tempo, Topaz

3.8L V-6 3 CFI Capri, Cougar, LTD, Marquis,
Mustang, T-Bird

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Ford OBD1 Systems

VEHICLES COVERED - CARS

Fuel Systems

8th VIN (Carburetor Computer

Engine Digit** Model) Application/Special Notes System

1984-1986 (Cont)

5.0L V-8 F, M CFI, SEFI Capri, Continental, Colony Park, EEC-IV
Cougar, Country Squire, Crown
Victoria, Grand Marquis, LTD,
Mark VII, Marquis, Mustang,
T-Bird, Town Car

1987-1993

1.9L I-4 J, 9 EFI, CFI, SFI Escort, EXP, Lynx, Tracer EEC-IV

2.0L I-4 A SEFI Probe (1993 manual transmis­sion only)

2.3L I-4 A FBC (YFA)* Capri, LTD, Marquis, Mustang
(1996 models)

2.3L I-4 OHC A, M EFI Mustang

2.3L I-4 T, W EFI Turbo Capri, Cougar, Merkur,
Mustang, T-Bird, XR4Ti

2.3L I-4 HSC S, X CFI, EFI, SEFI Tempo, Topaz

2.5L I-4 D EFI, CFI Sable, Taur us

3.0L V-6 1, U, Y EFI, SEFI, SFI Probe, Sable, T aurus, Tempo,

3.0L V-6 SHO Topaz (VIN 1 Taurus models are
Flexible Fuel)

3.8L V-6 3, 4, C, R CFI, EFI, SFI Capri, Continental, Cougar,
LTD, Marquis, Mustang, Sable,
T-Bird,Taurus

4.6L V-8 W, V SEFI Crown Victoria, Grand Marquis,
Mark VII, T o wn Car

5.0L V-8 F, M, E, SEFI Capri, Continental, Cougar,

T, D, 4 Crown Victoria, Grand Marquis,

Mark VII, Mustang, Mustang
Cobra, T-Bird, Town Car

1994

1.9L I-4 J SFI Escort, Topaz, Tracer EEC-IV

2.0L I-4 A SFI Probe

3.0L V-6 1, U, Y SFI Sab l e , Taurus , Tempo (VIN 1
Taurus models are Flexible Fuel)

3.8L V-6 4 SFI Continental, Cougar, Sable,

3.8L V-6 SC R T aurus, T-Bird

4.6L V-8 W, V SFI Crown Victoria, Grand Marquis,
Mark VIII, T o wn Car

5.0L V-8 T, D SFI Mustang, Mustang Cobra

1995

1.9L I-4 J SFI Escort, Tracer EEC-IV

2.0L I-4 A, 3 SFI Contour, Mystique, Probe

2.5L V-6 L SFI Contour, Mystique

3.0L V-6 1, U SFI Sable, Taurus (VIN 1 Taurus

3.0L V-6 SHO Y

models are Flexible Fuel)

3.8L V-6 4 SFI Cougar, Sable, T aurus, T-Bird

3.8L V-6 SC R

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Ford OBD1 Systems

VEHICLES COVERED - TRUCKS

TRUCKS/VANS - Ford Computer System Tool Application Table

The following table lists the year and model of all the trucks and vans
that are covered by the CanOBD2&1 Scan Tool.

Fuel Systems

8th VIN (Carburetor Computer

Engine Digit** Model) Application/Special Notes System

1995 (Cont)

4.6L V8 DOHC V SFI Mark VIII EEC-IV

5.0L V-8 HO T SFI Mustang

5.0L V-8 SHP D

NOTES

* Carburetor Model. Carburetor model numbers are usually stamped on top of the carbu-

retor, or on a metal tab attached to the carburetor. Consult your vehicle’s repair manual
for proper identification.

**VIN Number.The VIN number(s) used in this column identify the vehicle’s engine type.
This number is the 8th digit of the VIN (Vehicle Identification Number). Consult your vehi­cle’s repair manual for details.

Application Table Definitions. CFI = Central Fuel Injection;DOHC = Dual Overhead
Cam; EFI = Electronic Fuel Injection; FBC = Feedback Carburetor; HSC = High Swirl
Combustion; MFI = Multiport Fuel Injection; OHC = Overhead Cam;SC = Super Charged;
SEFI = Sequential Electronic Fuel Injection; SFI = Sequential Fuel Injection; SHO = Super
High Output

Fuel Systems

8th VIN (Carburetor Computer

Engine Digit** Model) Application/Special Notes System

1983

2.8L V-6 S FBC (2150A)* Bronco II and Ranger Pickup EEC-IV

1984

2.8L V-6 S FBC (2150A)* Bronco II, Ranger Pickup EEC-IV

4.9L I-6 Y FBC (YFA)* Bronco, E and F Series Trucks/

5.0L V-8 F FBC (2150A)*

Vans (8500 lb. GVW or less only)

5.8L V-8 G FBC (2150A)*

1985-1990

2.3L I-4 OHC A EFI Aerostar, Bronco II, Ranger EEC-IV

2.9L V-6 T EFI

(excluding Diesel)

2.8L V-6 S FBC (2150A)* Bronco, E and F Series Trucks/

4.9L I-6 Y, 9 FBC (YFA)*,

Vans (8500 lb. GVW or less only)

EFI

5.0L V-8 F FBC (2150A)*

5.0L V-8 N EFI

5.8L V-8 G FBC (2150A)* E and F Ser ies Trucks/Vans EEC-IV

7.3L V-8 M Diesel

(8500 lb.GVW or less only)

7.5L V-8 G EFI

1991-1994

2.3L I-4 OHC A EFI, MFI Ranger EEC-IV

2.9L V-6 T EFI

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Ford OBD1 Systems

VEHICLES COVERED - TRUCKS/VANS

Fuel Systems

8th VIN (Carburetor Computer

Engine Digit** Model) Application/Special Notes System

1991-1994 (Cont)

3.0L V-6 U EFI, SEFI, SFI Aerostar, Ranger EEC-IV

4.0L V-6 X EFI, MFI Aerostar, Explorer, Ranger

4.9L I-6 Y, H EFI, MFI, SFI Bronco, E and F Series Trucks/

5.0L V-8 N EFI, MFI, SFI

Vans (8500 lb. GVW or less only)

5.8L V-8 H, R EFI, MFI, SFI

7.3L V-8 M Diesel E and F Series Trucks/Vans

7.3L V-8 K T urbo Diesel

(Excludes 1994 diesel models)

7.5L V-8 G EFI, MFI

1995

3.0L V-6 U SFI Aerostar (Excludes Explorer, EEC-IV
Ranger and Windstar)

4.0L V-6 X SFI

4.9L I-6 Y SFI E and F series Tr ucks and Vans
(Excludes Natural Gas equipped
vehicles)

5.0L V-8 N SFI Bronco, E and F series Trucks
and Vans

5.8L V-8 H, R MFI

7.5L V-8 G MFI E-350; F-250-350 (Excludes
California ); F-Super Duty
(Excludes Diesel)

NOTES

* Carburetor Model. Carburetor model numbers are usually stamped on top of the carbu-

re-tor, or on a metal tab attached to the carburetor. Consult your vehicle’s repair manual
for proper identification.

**VIN Number.The VIN number(s) used in this column identify the vehicle’s engine type.
This number is the 8th digit of the VIN (Vehicle Identification Number). Consult your vehi­cle’s repair manual for details.

Application Table Definitions. EFI = Electronic Fuel Injection;FBC = Feedback
Carburetor; MFI = Multipor t Fuel Injection; OHC = Overhead Cam;SC = Super Charged;
SEFI = Sequential Electronic Fuel Injection; SFI = Sequential Fuel Injection

68 CanOBD2&1

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Ford OBD1 Systems

TEST CONNECTORS - CONNECTING THE CANOBD2&1 SCAN TOOL

TEST CONNECTORS

Ford vehicles are equipped with
special test connectors that
make it possible to connect spe­cialized testing equipment that
communicates with the vehicle's
onboard computer. Ford's vehi­cle test connectors are usually
dark in color (BLACK or GREY).
Sometimes they have a plastic
cover over them or are labeled
EEC Test. The connectors can
be found in the following gener­al locations in the engine com­partment:

•

Near the front corner (right or left).

•

Near the fender well (right or left).

•

Near the fire wall (right or left).

CONNECTING THE CANOBD2&1 SCAN TOOL

The CanOBD2&1 Scan Tool's Ford Connector Cable Adaptor
is designed to match the vehicle's computer DLC. When
properly connected, the vehicle's DLC should match the pre­molded guides around the adaptor. Make sure the adaptor
and the vehicle's DLC mate properly before applying force.
Forcing the adaptor onto the DLC improperly may result in
damage to the adaptor and/or CanOBD2&1 Scan Tool, and
possible damage to the vehicle's computer system.

■ Connect the CanOBD2&1 Scan Tool to BOTH.

1. Large, six pin female connector
with molded housing

2. Small, single pin female connector

1988 and newer vehicles
may have more than one
similar connector for other
systems (i.e. Anti-Lock
Brakes).Only the connector
with an extra single pin is
the correct test connector
for computer service codes use. If you have any questions
about the correct connector, please refer to your vehicle's
service manual for detailed information.

6-PIN

SINGLE

PIN

EEC-IV TEST CONNECTOR

EEC-IV
TEST
CONNECTOR

CODE
READER

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Ford OBD1 Systems

DIAGNOSTIC TROUBLE CODES / CODE RETRIEVAL PROCEDURES - OVERVIEW

DIAGNOSTIC TROUBLE CODES (DTCs)

Diagnostic Trouble Codes, or Fault Codes, can be used to identify
engine systems or components that are malfunctioning.The computer
records codes for two types of problems:

■ "Hard" Diagnostic Trouble Codes

"Hard" DTCs represent problems which are happening now and
cause the instrument panel Malfunction Indicator Lamp (MIL) or
Check engine light to illuminate and remain on until the failure is
repaired. A DTC is stored in the vehicle's computer memory for
each fault detected. A Tool or Scanner can be used to retrieve
DTCs that are stored in the vehicle's computer memory.

■ Intermittent/History DTCs

Intermittent/History DTCs are stored in the computer's memor y for
problems that occur intermittently, or for problems that happened in
the past but are not currently present.Intermittent DTCs may cause
the Malfunction Indicator light to flicker or stay on until the intermit­tent malfunction goes away. However, the corresponding fault code
will be stored in memory as a history DTC. If the malfunction that
caused the history DTC to set does not recur within a predeter­mined length of time (usually within 40-80 ignition key start cycles),
the computer will automatically erase the related fault code from its
memory.

CODE RETRIEVAL PROCEDURES

Overview of Ford Code Retrieval Process

Ford's computer self-diagnostic system is divided into four main sec­tions:

1. "Key On Engine Off" (KOEO) Self-Test

2. "Continuous Memory" (CM) Self-Test

3. "Key On Engine Running" (KOER) Self-Test

4. Other EEC-IV System tests

These Self-Tests are specially designed to monitor and/or test the var­ious components and circuits that are controlled by the vehicle's com­puter, and to save and/or transmit diagnostic test results to the
CanOBD2&1 Scan Tool in the form of numerical fault codes.

The "Continuous Memory" Self-Test is designed to run continuously
whenever the vehicle is normal operation. If a fault is detected by the
"Continuous Memory" Self-Test, a fault code is saved in the vehicle's
computer memory for later retrieval.

Ford’ s On-Board Diagnostic Self-Tests are designed in such a way that
in order to properly diagnose a problem, you

must

perform

all

the Self-

Tests, in the proper sequence.

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Ford OBD1 Systems

CODE RETRIEVAL PROCEDURES - KOEO TEST

As described previously, some tests are designed to detect problems
only when the vehicle is in normal operation.Some tests are designed
to activate components and detect problems only with the Key On and
Engine Off. Other tests are designed to activate components and test
their operation only with the Key On and Engine Running.

Do not take

short cuts.

If you fail to perform a test, or you perform a test out of
sequence, you might miss a problem that is only detected during that
part of the test.

Key On Engine Off (KOEO) Test

During the KOEO Self-Test, two groups of codes are retrieved by the
CanOBD2&1 Scan Tool.

■

The first group of codes retrieved by the CanOBD2&1 Scan Tool are
called "KOEO codes".A "KOEO" icon will show in the upper right cor­ner of the display to indicate that the code retrieved is a "K OEO" code .

■

The second group of codes are called "Continuous Memory" codes.
A "CM" icon will show in the upper right corner of the display to indi­cate that the code retrieved is a "Continuous Memory" code.

Check your vehicle thoroughly before performing any test.
See Before Y ou Begin on page 18 for details.

ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more infor-
mation.

1. Locate the vehicle's Data Link Connector (DLC). See Data Link

Connector (DLC) on page 68 for connector location.

Some DLCs have a plastic cov er that must be remov ed bef ore
connecting the CanOBD2&1 Scan Tool's cable connector.

2. Connect the CanOBD2&1 Scan Tool

cable (with the Ford Connector Cable
Adaptor attached) to the CanOBD2&1
Scan Tool, then connect the adaptor to
the vehicle's DLC. Press the POWER/

LINK button to turn the
CanOBD2&1 Scan Tool ON, then press

the ENTER/LD button to continue.

■ The Ford EEC-IV System menu displays.

Use the and buttons, as
necessary, to make menu selec­tions.

3. From the Ford EEC-IV System menu, highlight KOEO Test, then

press the ENTER/LD button.

4. When prompted by the CanOBD2&1 Scan Tool, start and war m-up

engine to normal operating temperature. Press the ENTER/LD
button to continue.

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Ford OBD1 Systems

CODE RETRIEVAL PROCEDURES - KOEO TEST

5. T urn ignition ke y OFF and w ait f or the on-screen prompt.If you wish

to exit the KOEO test at this time, press the ENTER/LD button
to return to the Ford EEC-IV System menu.

6. When prompted by the CanOBD2&1 Scan Tool, turn the ignition

ON. DO NOT start the engine. If your vehicle is equipped with one
of the following engine types, perform the added procedures
described below:

■ For 4.9L engines with standard transmission: Press and hold

the clutch until all codes are sent (steps 7 through 9).

■ For 7.3L diesel engines: Press and hold accelerator until all

codes are sent (steps 7 through 9).

■ For 2.3L turbo engines with octane switch: Put switch in pre-

mium position.

7. Press the ENTER/LD button to continue.

8. While codes are being retrieved, a "One

moment please KOEO test is in
progress..." message shows on the
CanOBD2&1 Scan Tool's display.

As soon as the ignition is turned
"on", the vehicle's computer
enters the Self-Test mode.
Clicking sounds will be heard coming from the engine.This is
normal. It indicates that the vehicle's computer is activating
relays, solenoids, and other components to check their oper­ation.

WARNING: On some vehicles equipped with an Electric
Cooling Fan, the computer activates the cooling fan to
check its operation. To avoid injury, keep hands or any
part of your body a safe distance from the engine during
this test.

■ If the CanOBD2&1 Scan Tool fails to

link to the vehicle's computer, a
"Vehicle is not responding" message
shows on the CanOBD2&1 Scan
Tool's display.Do the following:

- Verify the ignition is ON.

- Check the cable connections at
the CanOBD2&1 Scan Tool and at
the vehicle's DLC.

- Turn the ignition OFF, wait 10 seconds, then turn back ON to
reset the computer.

BE SURE to perform the added procedures in step 6,
if appropriate for your vehicle, during code retrieval.

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Ford OBD1 Systems

CODE RETRIEVAL PROCEDURES - KOEO TEST

- Press ENTER/LD button to continue.

9. If the CanOBD2&1 Scan Tool was able to link to the vehicle suc-

cessfully a "Code retrieval was successful..." message shows tem­porarily on the CanOBD2&1 Scan Tool's display followed by any
retrieved DTCs.

■ The CanOBD2&1 Scan Tool will dis-

play a code only if codes are present
in the vehicle's computer memory.

■ If no problems are found during the

KOEO Self-Test, the computer sends
a "PASS" code (code 11 or 111) to
the CanOBD2&1 Scan Tool.

■ If no Continuous Memory codes are

present in the vehicle's computer
memory, the CanOBD2&1 Scan Tool
will display a "PASS" code (code 11
or 111).

Most Ford EEC-IV vehicle com­puters up to 1991 use a two-digit
code system. From 1991 to 1995
most use a three digit code system.

10.If more than one code was retrieved, press DTC SCROLL but-
ton, as necessary, to display additional codes one at a time.

In the case of long code definitions, a small arrow is shown
in the upper/lower right-hand corner of the code display area
to indicate the presence of additional information. Use the

and buttons, as necessary, to view the additional

information.

11. Disconnect the CanOBD2&1 Scan Tool from the vehicle and turn
the ignition key OFF.

12.To prolong battery life, the CanOBD2&1 Scan Tool automatically
shuts "Off" after approximately three minutes of no button activity.
The DTCs retrieved will remain in the CanOBD2&1 Scan Tool's
memory, and may be viewed at any time. If the CanOBD2&1 Scan
Tool's batteries are removed, or if the CanOBD2&1 Scan Tool is re­linked to a vehicle to retrieve codes, any prior codes in its memory
are automatically cleared.

■ See Viewing DTCs in the CanOBD2&1 Scan Tool's Memory

on page 14 to view DTCs stored in the CanOBD2&1 Scan Tool's
memory.

13.Follow the testing and repair procedures outlined in the vehicle's
service repair manual to correct "hard" DTCs. Codes should be
addressed and eliminated in the order they were received, erasing
(see Erasing DTC's on page 102) and retesting after each repair is
done to be sure the fault was eliminated.

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Ford OBD1 Systems

CODE RETRIEVAL PROCEDURES - ENGINE TIMING CHECK

IMPORTANT: DO NOT service "Continuous Memory" codes

at this time.Before "Continuous Memory" codes can be serv­iced, both the KOEO and the KOER Self-Tests must pass (a
PASS code 11 or 111 is obtained). After both of these tests
have passed, erase the vehicle's computer memory (see
Erasing DTCs on page 102), take the vehicle for a short
drive, then repeat the KOEO Self-Test. If any Continuous
Memory faults are present, service them all this time.Consult
the vehicle's service repair manual for servicing Continuous
Memory Fault Codes.

The green, yellow and red LEDs are used (with the LCD dis­play) as visual aids to make it easier to determine engine sys­tem conditions. See Servicing Diagnostic Trouble Codes
on page 100 for information on interpreting LEDs and servic­ing DTCs.

Do not proceed to the ignition timing check procedure or the
KOER test until a PASS code (code 11 or 111) for KOEO test
is obtained.

Engine Timing Check

Before performing the KOER Self-Test, the vehicle's Ignition
Base Timing and the computer's ability to electronically con­trol timing advance must be checked for proper operation.
Maladjustment of ignition timing, or a problem in the advance
circuit, might generate false fault codes when performing the
KOER Self-Test that would cause the test to be invalid. Use
the following procedures to check for proper ignition timing
and to verify the computer's ability to electronically advance
ignition timing.

The following "Timing Check" procedure is only applica­ble to 1992 and older vehicles (excluding diesel
engines). For 1993 and newer vehicles, refer to the vehi­cle's service repair manual for procedures to check and
adjust timing. DO NOT ATTEMPT TO ADJUST TIMING ON
THESE VEHICLES WITHOUT MANUF ACTURER'S SPECI­FICATIONS AND PROCEDURES.

For 1992 and older vehicles, the CanOBD2&1 Scan Tool can be used
in combination with a timing light to check ignition timing and the vehi­cle computers ability to advance ignition timing.

Check your vehicle thoroughly before performing any test.
See Before Y ou Begin on page 18 for details.

ALWAYS observe safety precautions whenever working on a
vehicle. Read and follow Safety Precautions on page 3
before performing this test.

74 CanOBD2&1

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CODE RETRIEVAL PROCEDURES - ENGINE TIMING CHECK

■ A timing light is required to perform this test.

■ The vehicle must pass the KOEO Test (page 70) before performing

this test.

1. Locate the vehicle's Data Link Connector (DLC). See Data Link
Connector on page 68 for connector location.

Some DLCs have a plastic cover that must be removed
before connecting the CanOBD2&1 Scan Tool's cable con­nector.

2. Connect the CanOBD2&1 Scan Tool
cable (with the Ford Connector Cable
Adaptor attached) to the CanOBD2&1
Scan Tool, then connect the adaptor to
the vehicle's DLC. Press the

POWER/LINK button to turn the
CanOBD2&1 Scan Tool ON, then press

ENTER/LD button to continue.

■ The Ford EEC-IV System menu dis-

plays.

Use the and buttons, as
necessary, to make menu selec­tions.

3. From the Ford EEC-IV System menu,
highlight Timing Check, then press the

ENTER/LD button.

■ The Timing Check menu displays.

4. From the Timing Check menu, highlight
the appropriate option for the vehicle
under test, then press the ENTER/LD

button.

■ 1993 and newer selected - an instruc-

tional message shows on the
CanOBD2&1 Scan Tool’s display, refer­ring you to the vehicle’s service manu­al for timing check procedures. Press

the ENTER/LD button to return to
the Ford EEC-IV System menu.

■ 1992 and older selected - proceed to step 5.

5. When prompted by the CanOBD2&1 Scan Tool, start and war m-up
engine to normal operating temperature.Press the ENTER/LD

button to continue.

6. Turn off all vehicle accessories, then turn ignition key OFF and wait
for the on screen prompt. If you wish to exit the Timing Check pro-

cedure at this time, press the ENTER/LD button.

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Ford OBD1 Systems

CODE RETRIEVAL PROCEDURES - KOER TEST

7. When prompted by the CanOBD2&1

Scan Tool, start the engine and press
the ENTER/LD button.

■ A "One moment please preparation

for test is in progress”message shows
temporarily on the CanOBD2&1 Scan
Tool's display, followed by the mes­sage "Perform Timing Check within
two minutes."

8. When "Perform Timing Check within 2 minutes" displays, perform
the Timing Check as follows:

■ The vehicle's computer is pro-

grammed to advance ignition timing
20° (±3°) above the vehicle's "base
timing" value, and to freeze this set­ting for two minutes from the time the
"Perform Timing Check within 2 min­utes" message displays. This allows
the user to check the computer's abil­ity to advance ignition timing.

■ Within this two-minute period, follow instructions in the vehicle's

service repair manual to check the ignition timing with a timing
light and ensure that it is 20° above the specified base timing
value (±3°).

Example: If base timing specification is 10° BTDC, the acceptable tim­ing light reading should be in the range of 27° to 33° BTDC.

Base-timing specifications can be found on the Vehicle
Emission Control Information (VECI) decal. The decal is
located under the hood or near the radiator.If the VECI decal
is missing or damaged, refer to your vehicle's service repair
manual for specifications.

9. If timing light readings are within the acceptable range:

■ Base timing and the vehicle computer's ability to advance timing

are working properly.

■ Proceed to the KOER Self-Test below.

10. If timing light readings are not within the acceptable range:

■ Base timing may be out of adjustment, or the computer may have

problems with the timing advance circuit.

■ Refer to the vehicle's service repair manual for procedures on

adjusting and/or repairing ignition timing. Repairs to ignition tim­ing must be made before proceeding to the KOER Test.

76 CanOBD2&1

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Ford OBD1 Systems

CODE RETRIEVAL PROCEDURES - KOER TEST

Key on Engine Running (KOER) Self-Test

IMPORTANT: The KOEO Self-Test (page 70) must be per-

formed first, and a "pass code" (code 11 or 111) must be
obtained before performing the KOER Self-Test; otherwise,
results of the KOER Self-Test may be invalid.

Ignition timing and timing advance must be operating proper­ly in order for the KOER Self-Test results to be considered
valid. Perform an Engine Timing check (page 73) before per­forming the KOER Self-Test.

Check your vehicle thoroughly before performing any test.
See Before Y ou Begin on page 18 for details.

ALWAYS observe safety precautions whenever working on a
vehicle. Read and follow Safety Precautions on page 3
before performing this test.

■ The vehicle must pass the Engine Timing Check (page 73) before

performing this test.

1. Locate the vehicle's Data Link Connector (DLC). See Data Link
Connector (DLC) on page 68 for connector location.

Some DLCs have a plastic cov er that must be remov ed bef ore
connecting the CanOBD2&1 Scan Tool cable connector.

2. Connect the CanOBD2&1 Scan Tool
cable (with the Ford Connector Cable
Adaptor attached) to the CanOBD2&1
Scan Tool, then connect the adaptor to
the vehicle's DLC. Press the

POWER/LINK button to turn the
CanOBD2&1 Scan Tool ON, then press

the ENTER/LD button to continue.

■ The Ford EEC-IV System menu dis-

plays.

Use the and buttons, as
necessary, to make menu selec­tions.

3. From the Ford EEC-IV System menu, highlight KOER Test, then
press the ENTER/LD button.

4. When prompted by the CanOBD2&1 Scan Tool, start and war m-up
engine to normal operating temperature.Press the ENTER/LD

button to continue.

5. Turn off all vehicle accessories, then turn ignition key OFF and wait
for the on screen prompt. If you wish to exit the KOER test at this

time, press the ENTER/LD button.

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Ford OBD1 Systems

CODE RETRIEVAL PROCEDURES - KOER TEST

6. When prompted by the CanOBD2&1

Scan Tool, start the engine and press
the ENTER/LD button to continue.

A "One moment please KOER test is in
progress..." message shows temporarily
on the CanOBD2&1 Scan Tool's display.

7. The CanOBD2&1 Scan Tool will retrieve
and display the Cylinder Identification
(ID) Code.The Cylinder ID Code identi­fies the number of cylinders of the vehi­cle that is under test.

If the CanOBD2&1 Scan Tool fails to
retrieve CYL ID and DTCs, its possi­ble that the KOEO Test was not per­formed properly before proceeding to the KOER Test.Go back and
perform the KOEO Test (page 70) until a PASS code is obtained.

8. Perform the following procedures when prompted by the message
on the CanOBD2&1 Scan Tool's display.

■ Turn the steering wheel 1/2 tur n to right, hold for four seconds

and release.

■ Press the brake pedal to the floor and then release it.

■ Cycle the Overdrive Switch (if equipped).

■ Quickly press the accelerator pedal to the floor and then release it.

9. After the above procedures are performed
a "One moment please KOER test is in
progress..." message shows temporarily
on the CanOBD2&1 Scan Tool's display,
followed by a "Retrie ving codes" message.

10.If the CanOBD2&1 Scan Tool was able
to link to the vehicle successfully, a
“Code retrieval was successful...” message shows temporarily on the
CanOBD2&1 Scan Tool’s display, followed by any retrieved DTCs.

If code 98 or 998 displays, the
vehicle is operating in "Failure
Mode". The computer goes into
failure mode when it detects a sig­nal from a sensor that indicates
the sensor has failed and is com­pletely out of specifications. The
computer substitutes a fixed signal
value for the failed sensor to keep the vehicle running. Failure
mode codes 98 or 998 are usually accompanied by one or
more Diagnostic Trouble Codes that indicate the failed sensor.
A vehicle operating in failure mode is operating at a minimal
level, and the faults that are causing these Diagnostic Trouble
Codes to set must be repaired as soon as possible.

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Ford OBD1 Systems

ADDITIONAL TESTS FOR EEC-IV SYSTEMS

Most Ford EEC-IV vehicle computers up to 1991 use a two­digit code system. From 1991 to 1995 most use a three-digit
code system.

11.If no problems are found during the
KOER Self-Test, the computer sends a
"PASS code" (code 11 or 111) to the
CanOBD2&1 Scan Tool. Code 11 or 111
indicates that all the relays and actua­tors and their related circuits that were
tested during the KOER Self-Test are
OK, and no faults were found.

12.After the CanOBD2&1 Scan Tool retrieves all the KOER Self-Test
DTCs, turn the engine off, and disconnect the CanOBD2&1 Scan
Tool from the vehicle's test connectors.The DTCs retrieved are now
stored in the CanOBD2&1 Scan Tool's memory.

■ See Viewing DTCs in the CanOBD2&1 Scan Tool's Memory

on page 14 to view DTCs stored in the CanOBD2&1 Scan Tool's
memory.

All retrieved DTCs will remain in the CanOBD2&1 Scan Tool's
memory. If the KOER Test procedure is performed again,
DTC's from a prior test will automatically clear and will be
replaced by the most current DTCs retrieved.

13.All KOER codes that are retrieved by the CanOBD2&1 Scan Tool
during the KOER Self-Test represent problems that are present now
(at the time the test is performed).The related vehicle problems that
caused the codes to be sent must be repaired using the procedures
described in the vehicle's repair manual.

The green, yellow and red LEDs are used (with the LCD display)
as visual aids to make it easier to determine engine system con­ditions.See Servicing Diagnostic T roub le Codes on page 100
for information on interpreting LEDs and servicing DTCs.

14.After all repairs have been completed, repeat the KOER Self-Test.

15.If a "pass code" (code 11 or 111) is

received, it indicates that the repairs
were successful and all the related sys­tems are working properly.

16.If a "pass code" (code 111 or 111) is not
received, the repair was unsuccessful.
Consult the vehicle's service manual
and recheck repair procedure.

ADDITIONAL TESTS FOR EEC-IV SYSTEMS

These tests are additional, supplemental tests, and are not
needed to retrieve Diagnostic Trouble Codes. Ford has
included them to further assist the technician / do-it-your­selfer in the troubleshooting of vehicle problems.

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Ford OBD1 Systems

ADDITIONAL TESTS FOR EEC-IV SYSTEMS - CYLINDER BALANCE TEST

Cylinder Balance Test (Vehicles equipped with Sequential
Electronic Fuel Injected (SEFI) systems only)

The Cylinder Balance Test assists in finding a weak or noncontributing
cylinder. The computer shuts off fuel (cuts off power to injectors) to
each cylinder, in sequence, and monitors for RPM changes (drop).
Based on this information, the computer determines if all the cylinders
are contributing power equally (for proper engine operation), or if some
cylinders are only contributing partially or not contributing at all.

SEFI Introduction

Sequential Electronic Fuel Injection (SEFI) belongs to a family of fuel
injection systems called "Multi-port/Multipoint Fuel Injection". Multi­port (MFI) fuel injection systems contain one fuel injector per cylinder,
and the vehicle's computer electronically controls their operation. On
some multi-port fuel injection systems, the injectors all fire at the same
time and at every engine rev olution.On other systems the injectors fire
in groups and/or at every other engine revolution. What distinguishes
Sequential Electronic Fuel Injection systems from other multi-port fuel
injection systems is that each injector is independently energized and
fires sequentially one after the other in the proper firing order. This
gives the vehicle's computer more control to cut the fuel to one injec­tor at a time (this can't be accomplished on the other systems because
they fire in groups of two ore more injectors).

Cylinder Balance Test Procedure

Check your vehicle thoroughly before performing any test.
See Before Y ou Begin on page 18 for details.

ALWAYS observe safety precautions whenever working on a
vehicle.Read and follow Safety Precautions on page 3 before
performing this test.

1. Locate the vehicle's Data Link Connector (DLC). See Data Link
Connector (DLC) on page 68 for connector location.

Some DLCs have a plastic cov er that must be remov ed bef ore
connecting the CanOBD2&1 Scan Tool cable connector.

2. Connect the CanOBD2&1 Scan Tool
cable (with the Ford Connector Cable
Adaptor attached) to the CanOBD2&1
Scan Tool, then connect the adaptor to
the vehicle's DLC. Press the

POWER/LINK button to turn the
CanOBD2&1 Scan Tool ON, then press

the ENTER/LD button to continue.

■ The Ford EEC-IV System menu displays.

Use the and buttons, as necessary, to make menu
selections.

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Ford OBD1 Systems

ADDITIONAL TESTS FOR EEC-IV SYSTEMS - CYLINDER BALANCE TEST

3. From the Ford EEC-IV System menu,

highlight Cylinder Balance Test, then
press the ENTER/LD button.

■ An “application” advisory message

shows on the CanOBD2&1 Scan
Tool’s display.

■ If your vehicle IS equipped with the Sequential Fuel Injection,

press the ENTER/LD button to continue.

■ If your vehicle IS NOT equipped with Sequential Fuel Injection,

select Back, then press the ENTER/LD button to exit the
Cylinder Balance Test.

4. When prompted by the CanOBD2&1 Scan Tool, start and war m-up
engine to normal operating temperature.Press the ENTER/LD

button to continue.

5. Turn off all vehicle accessories, then turn ignition key OFF and wait
for the on screen prompt. If you wish to exit the Cylinder Balance

test at this time, press the ENTER/LD button.

6. When instructed by the message on the
CanOBD2&1 Scan Tool's display, start
the engine and press the ENTER/LD

button. A "One moment please
preparation for test is in progress..."
message shows temporarily on the
CanOBD2&1 Scan Tool's display.

7. When prompted by the CanOBD2&1
Scan Tool, lightly press the accelerator
pedal half way and release to activate
the cylinder balance test.

For 1986 models ONLY: Fully
press accelerator once and
release.

■ A “One moment please test is in progress...” message shows on

the CanOBD2&1 Scan Tool’s display.

■ The computer is now in Cylinder Balance Test mode, and will

start cutting fuel to each cylinder in sequence to determine if all
the cylinders are contributing equally. It may take up to five

minutes before the test results are transmitted to the
CanOBD2&1 Scan Tool.

8. If the vehicle's computer fails to enter Cylinder Balance Test mode,

do the following:

■ Lightly press the accelerator pedal again as described in step 7

above.

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Ford OBD1 Systems

ADDITIONAL TESTS FOR EEC-IV SYSTEMS -RELAY AND SOLENOID TEST

■ Check your vehicle's fuel injection system and make sure that it

is a Sequential Electronic Fuel Injection (SEFI) system.This test
is applicable only to SEFI or SFI systems.

9. After the Cylinder Balance Test is com­pleted, the test results are sent to the
CanOBD2&1 Scan Tool.

■ The computer compares the power

contribution that each cylinder makes
to engine operation.

10.If all cylinders are contributing equally,
the computer determines that power dis­tribution is normal and a “System Pass”
message will display.

If the computer detects a prob­lem with a cylinder(s) when
performing the initial Cylinder
Balance Test, it needs to repeat
the test two more times to properly determine which
cylinder or cylinders are malfunctioning. If this is the
case, the CanOBD2&1 Scan Tool will display the “Lightly
press the accelerator half way and release” message
again instead of the “System Pass”. Proceed to step 11.

11.If a cylinder is not contr ibuting at the same level as the other cylin-

ders, the computer prompts you to repeat the test two more times
by displaying the “Lightly press the accelerator half way and
release” message again.Each time the message displays, perform
the procedures as instructed.

12.After the repeat Cylinder Balance tests
have completed, the computer will iden­tify which cylinder (or cylinders) are not
contributing equally, and will send this
information to the CanOBD2&1 Scan
Tool’s display.

■ If any weak cylinders are identified,

consult the vehicle’s service repair
manual to perform further testing and/or repairs.

Relay and Solenoid Test (Output State Check)

The "Output State Check" is a special program in the vehicle's com­puter that allows the user to energize (turn ON) and de-energize (turn
OFF), on command, most of the actuators (relays and solenoids) that
are controlled by the computer.

Use this test to check computer output voltages and relay/solenoid
operation.

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ADDITIONAL TESTS FOR EEC-IV SYSTEMS -RELAY AND SOLENOID TEST

The fuel injectors and fuel pump are not energized during this
test. Check your vehicle thoroughly before performing any
test. See Before You Begin on page 18 for details.

ALWAYS observe safety precautions whenever working on a
vehicle.

Read and follow Safety Precautions on page 3 before per­forming this test.

1. Locate the vehicle's Data Link Connector (DLC). See Data Link
Connector (DLC) on page 68 for connector location.

Some DLCs have a plastic cov er that must be remov ed bef ore
connecting the CanOBD2&1 Scan Tool cable connector.

2. Connect the CanOBD2&1 Scan Tool
cable (with the Ford Connector Cable
Adaptor attached) to the CanOBD2&1
Scan Tool, then connect the adaptor to
the vehicle's DLC. Press the

POWER/LINK button to turn the
CanOBD2&1 Scan Tool ON, then press

the ENTER/LD button to continue.

■ The Ford EEC-IV System menu dis-

plays.

Use the and buttons, as
necessary, to make menu selec­tions.

3. From the Ford EEC-IV System menu,
highlight Output State Check, then

press the ENTER/LD button.

4. When prompted by the CanOBD2&1 Scan Tool, start and war m-up
engine to normal operating temperature.Press the ENTER/LD

button to continue.

5. T urn ignition ke y OFF and w ait for the on screen prompt.If you wish
to exit the Output State Check at this time, press the ENTER/LD

button.

6. When prompted by the CanOBD2&1 Scan Tool, turn ignition ON.
DO NOT start the engine.If your vehicle is equipped with one of the
following engine types, perform the added procedures described
below:

■ For 4.9L engines with standard transmission: Press and hold

the clutch until the "Output State Check Active" screen displays.

■ For 7.3L diesel engines: Press and hold accelerator until the

"Output State Check Active" screen displays

■ For 2.3L turbo engines with octane switch: Put switch in pre-

mium position.

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Ford OBD1 Systems

ADDITIONAL TESTS FOR EEC-IV SYSTEMS - RELAY AND SOLENOID TEST

7. Press the ENTER/LD button to continue.

8. A "One moment please test is in

progress..." message shows on the
CanOBD2&1 Scan Tool's display.

As soon as the ignition is turned
"on", the vehicle's computer enters
the Self-Test mode. Clicking
sounds will be heard coming from
the engine.This is normal.

WARNING: On some vehicles equipped with an Electric
Cooling Fan, the computer activates the cooling fan to
check its operation.To avoid injury, keep hands or any part
of your body a safe distance from engine during the test.

■ If the CanOBD2&1 Scan Tool fails to

link to the vehicle's computer, a
"Vehicle is not responding" message
shows on the CanOBD2&1 Scan
Tool's display.Do the following:

- Verify the ignition is ON.

- Check the cable connections at
the Code Reader and at the vehi­cle's DLC.

- Turn the ignition OFF, wait 10 seconds, then turn back ON to
reset the computer.

BE SURE to perform the added procedures in step 6,
if appropriate for your vehicle, BEFORE turning the
ignition ON.

- Press ENTER/LD button to continue.

9. If the CanOBD2&1 Scan Tool was able
to link to the vehicle successfully an
"Output State check active..." message
shows temporarily on the CanOBD2&1
Scan Tool's display.This message is fol­lowed by a display that instructs you
how to perform the test.

10.Press the accelerator pedal once, then release. This activates the
Output State Check and energizes most of the actuators (relays
and solenoids) that are controlled by the vehicle's computer.

If your vehicle is equipped with an Integrated Vehicle Speed
Control, disconnect the vacuum supply hose from the speed
control servo before pressing the accelerator. Reconnect
vacuum hose after test.

11.To de-energize the actuators, press the acceler ator pedal again and
release, the actuators are now de-energized.

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Ford OBD1 Systems

ADDITIONAL TESTS FOR EEC-IV SYSTEMS -WIGGLE TEST

12.The procedure can be repeated as many times as desired by press-

ing and releasing the accelerator pedal to energize and de-energize
the actuators.

13. Consult the vehicle's service repair manual for a list of actuators
(solenoids and relays) controlled by the computer that apply to the
vehicle under test, and which actuators should energize and de­energize when performing the Output State Check. All applicable
actuators should be on when energized and off when de-energized.

14. If an actuator is not responding to the Output State Check, follow
the procedures described in the vehicle's service manual to check
computer actuator output circuit voltages and/or grounds.

15.The Output State Check will stay active as long as desired.To quit
the Output State Check, turn the ignition OFF and disconnect the
CanOBD2&1 Scan Tool from the vehicle.

Wiggle Test

Since any DTC’s from Wiggle Test results are saved in
Continuous Memory , it is suggested that y ou clear an y DTC’s
in Continuous Memory before performing Wiggle Test (see
Erasing DTC’s on page 102 for procedures). This way you
start with a clean slate, and any faults detected during the
procedure will be related to that particular circuit tested.

Use this test to check for intermittent faults in some circuits.

Circuits T ested:
1984 & Newer - Air Charge Temp Sensor (ACT), Barometer Pressure

Sensor (BP), Engine Coolant Temp Sensor (ECT), Exhaust Gas
Oxygen Sensor (EGO), EGR Valve Position Sensor (EVP), Manifold
Absolute Pressure (MAP), Throttle Position Sensor (TP), Vane Air
Temp Sensor (VAT)

1985 & Newer - Vane Air Flow Sensor (VAF)
1986 & Newer - Pressure Feedback EGR Sensor (PFE)
1990 & Newer - Exhaust Gas Oxygen Sensor (EGO), Ignition

Diagnostic Monitor (IDM) (DIS or Dual Plug DIS only), Idle Tracking
Switch (ITS), Mass Air Flow Sensor (MAF)

ALWAYS observe safety precautions whenever working on a
vehicle. Read and follow Safety Precautions on page 3
before performing this test.

1. Locate the vehicle's Data Link Connector (DLC). See Data Link
Connector (DLC) on page 68 for connector location.

Some DLCs have a plastic cov er that must be remov ed bef ore
connecting the CanOBD2&1 Scan Tool cable connector.

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Ford OBD1 Systems

ADDITIONAL TESTS FOR EEC-IV SYSTEMS -WIGGLE TEST

2. Connect the CanOBD2&1 Scan Tool cable (with the Ford Connector

Cable Adaptor attached) to the CanOBD2&1 Scan Tool, then con­nect the adaptor to the vehicle's DLC.Press the POWER/LINK

button to turn the CanOBD2&1 Scan Tool ON, then press the
ENTER/LD button to continue.

■ The Ford EEC-IV System menu displays.

Use the and buttons, as necessary, to make menu
selections.

3. From the Ford EEC-IV System menu,
highlight Wiggle Test, then press the

ENTER/LD button.

4. When prompted by the CanOBD2&1

Scan Tool, start and warm-up engine to
normal operating temperature. Press

the ENTER/LD button to continue.

5. T urn ignition ke y OFF and w ait f or the on-screen prompt.If you wish
to exit the K OEO test at this time, press the ENTER/LD button.

6. Select the desired Wiggle Test from the
menu displayed.

■ To perform the KOEO Wiggle Test:

- Highlight KOEO Wiggle T est.

- Turn ignition ON. DO NOT start
the engine.

- Press the ENTER/LD button to continue.

■ To perform the KOER Wiggle Test:

- Highlight KOER Wiggle T est.

- Turn the ignition ON and star t the engine.

- Press the ENTER/LD button to continue.

7. A "One moment please test is in
progress" message shows temporarily
on the CanOBD2&1 Scan Tool’s display.

■ If the CanOBD2&1 Scan Tool fails to

link to the vehicle's computer, a
"Vehicle is not responding" message
shows on the CanOBD2&1 Scan
Tool's display.Do the following:

For KOEO Wiggle Test:

- Verify the ignition is ON.

- Turn the ignition OFF, wait 10 seconds, then turn back ON to
reset the computer.Press the ENTER/LD button to con­tinue.

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Ford OBD1 Systems

ADDITIONAL TESTS FOR EEC-IV SYSTEMS -WIGGLE TEST

For KOER Wiggle Test:

- Turn the engine OFF, wait 10 seconds, then turn back ON.
Press the ENTER/LD button to continue.

BE SURE to perform the added procedures in step 6,
if appropriate for your vehicle, BEFORE turning the
ignition ON.

- Press ENTER/LD button to continue.

8. If the CanOBD2&1 Scan Tool was able to link to the vehicle suc­cessfully, a "Wiggle test is active..." message shows temporarily on
the CanOBD2&1 Scan Tool’s display.This is followed by a message
instructing you how to perform the test.

■ Press the ENTER/LD button if you wish to exit the Wiggle

Test at this time.

9. Wiggle, tap and move the suspected sensor or wiring.

■ If no faults are detected when per-

forming the Wiggle Test, a "System
Pass" message displays.

■ If a fault is detected when performing

the Wiggle Test, a "Circuit Fault
detected" message displays.

If the Wiggle Test detects
any problems, the related
DTC will be stored by the
computer in "Continuous
Memory". To view any
Wiggle Test DTC’s you
must perform the KOEO
Test. See page 70 for
KOEO Test procedures.

10.Follow the procedures in the vehicle's service repair manual to per­form troubleshooting and repairs for Wiggle Test results.

11.The Wiggle Test will stay active as long as desired. To quit the
Wiggle Test, turn the ignition OFF and disconnect the CanOBD2&1
Scan Tool from the vehicle.

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GM OBD1 Systems

YOUR VEHICLE’S COMPUTER SYSTEM - VEHICLES COVERED

YOUR VEHICLE'S COMPUTER SYSTEM

Today's vehicles are equipped with computer self-testing abilities that can
locate problems in your vehicle and store them as Diagnostic Trouble
Codes (DTC's) in the vehicle's onboard computer.The CanOBD2&1 Scan
T ool allows y ou access to the computer's memory and retrieves the DTC's.

VEHICLES COVERED

The CanOBD2&1 Scan Tool may be used to retrieve engine service
codes from most General Motors (GM) and Saturn domestic cars and
trucks (EXCEPT Geo, Nova, and Sprint).

Model
Year Make Model

1982-93 Buick Century, Electra, Electra Wagon, Estate Wagon,

Le Sabre, Le Sabre Wagon, Park Avenue,
Reatta, Regal, Grand National, Riviera, Road-

master, Skyhawk, Skylark, Somerset
Cadillac De Ville, El Dorado, Fleetwood, Seville
Chevrolet Berreta, Camaro, Caprice, Cavalier, Celebrity,

Chevette, Citation, Corisca, Corvette, El Camino,

Impala, Lumina, Monte Carlo
Oldsmobile Achieva, Calais, Custom Cruiser, Cutlass Calais,

Ciera, Cutlass Cruiser, Cruiser Wagon, Cutlass

Supreme, Supreme Classic, Delta 88, Eighty-

eight, Firenze, Ninety-eight, Omega, Toronado,

Tour ing Sedan, Trofeo
Pontiac 6000, 6000 STE, Bonneville, Fiero, Firebird,

Grand Am, Grand Prix, J 2000, Lemans,

J Parisienne, Phoenix, Safari, Safari Wagon,

Sunbird, T 1000
Saturn All models
Tr ucks All one ton capacity or less with gas engines

and Vans

1994 Buick Roadmaster 5.7 liter

Chevrolet Camaro 3.4 liter/5.7 liter, Caprice 5.7 liter,

Cavalier 3.1 liter, Lumina 3.1 liter
Pontiac Firebird 3.4 liter/5.7 liter, Sunbird 2.0 liter/

3.1 liter
Saturn All models
Tr ucks All one ton capacity or less with gas engines

and Vans

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GM OBD1 Systems

ABOUT THE CANOBD2&1 SCAN TOOL - DLC - MIL

In addition to the above list, the CanOBD2&1 Scan Tool
IS ALSO COMPATIBLE with OBD1 GM models that are
equipped with "Climate Control Computers".

For 1994 and 1995 vehicles, only the models listed abo v e are
compatible with the CanOBD2&1 Scan Tool.

ABOUT THE CANOBD2&1 SCAN TOOL

The CanOBD2&1 Scan Tool is a device that connects to your vehicle's
Data Link Connector to retrieve any Diagnostic Trouble Codes that are
stored in the vehicle's on-board computer.

DATA LINK CONNECTOR (DLC)

Your vehicle test connector is known as
the Assembly Line Data Link (ALDL) con­nector, Assembly Line Communication
Link (ALCL) Connector or the Data Link
Connector (DLC). The GM DLC connec­tor contains 12 pins and is usually black in color .On most GM vehicles,
the connector is found under the left side of the dashboard.

MALFUNCTION INDICATOR LIGHT (MIL)

Your vehicle's instrument panel has a Malfunction Indicator Light (MIL)
also called the "Check Engine" or "Service Engine soon" light.The MIL
is an indicator to warn the vehicle operator of a problem in the com­puter control system.

If your instrument panel indicator lights do not come on when
you turn on the ignition, please refer to your vehicle's service
manual.You may have problems in the vehicle's circuitry.

Model
Year Make Model

1995 Chevrolet Caprice 4.3 liter

Saturn All models
Tr ucks All one ton capacity or less with gas engines

and Vans (EXCEPT S/T Series vehicles)

SERVICE

CHECK ENGINE

ENGINE

SOON

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GM OBD1 Systems

DTCs - CODE RETRIEVAL PROCEDURE

DIAGNOSTIC TROUBLE CODES (DTC's)

The service codes are also called "fault codes", "Diagnostic Trouble
Codes" (DTC's) or "trouble codes".These codes can be used to iden­tify systems or components that are malfunctioning. The computer
records codes for two types of problems:

■ "Hard" Diagnostic Trouble Codes

"Hard" DTCs represent problems that are occurring now and cause the
instrument panel Malfunction Indicator Lamp (MIL) or Check Engine
light to illuminate and remain on until the failure is repaired. A DTC is
stored in the vehicle's computer memory for each fault detected.A Tool
or Scanner can be used to retrieve DTCs that are stored in the vehi­cle's computer memory.

■ Intermittent/History DTCs

Intermittent/History DTCs are stored in the computer's memory for
problems that occur intermittently , or f or problems that happened in the
past but are not currently present. Intermittent DTCs may cause the
Malfunction Indicator light to flicker or stay on until the intermittent mal­function goes away. However, the corresponding fault code will be
stored in memory as a history DTC. If the malfunction that caused the
history DTC to set does not recur within a predetermined length of time
(usually within 40-80 ignition key start cycles), the computer will auto­matically erase the related fault code from its memory.

CODE RETRIEVAL PROCEDURE

Never replace a part based only on the DTC definition.
Each DTC has a set of testing procedures, instructions and
flow charts that must be followed to confirm the location of
the problem.This information is found in the vehicle's service
manual. Always refer to the vehicle's service manual for
detailed testing instructions.

Check your vehicle thoroughly bef ore perf orming any
test. See Before Y ou Begin on page 18 for details.

ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more infor-
mation.

1. Locate the vehicle's Data Link Connector (DLC). See Data Link
Connector (DLC) on page 88 for connector location.

Retrieving and using Diagnostic Trouble Codes (DTCs) for

troubleshooting vehicle operation is only one part

of an overall diagnostic strategy.

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CODE RETRIEVAL PROCEDURE

Some DLCs have a plastic cov er that must be remov ed bef ore
connecting the CanOBD2&1 Scan Tool's cable connector.

2. Connect the CanOBD2&1 Scan Tool
cable (with the GM Connector Cable
Adaptor attached) to the CanOBD2&1
Scan Tool, then connect the adaptor to
the vehicle’s DLC. Press the

POWER/LINK button to turn the
CanOBD2&1 Scan Tool ON, then press the ENTER/LD button

to continue.

3. Select the model year of the vehicle from which you wish to retrieve
codes:

If a previous vehicle selection is currently saved in the
CanOBD2&1 Scan Tool's memory, the "Current Selection/
Select New Vehicle" menu displays. If no previous vehicle
selection is stored in the CanOBD2&1 Scan Tool's memory,
"Select Vehicle Year" menu displays.

Use the and buttons, as necessary, to make menu
selections.

■ To retrieve DTCs from the vehicle selection currently in the

CanOBD2&1 Scan Tool’s memory:

- From the “Current Selection/
Select New Vehicle” screen, high­light Current Selection, turn igni-
tion key ON (DO NOT start
engine) and press the ENTER/FF

button.

- Proceed to step 5 to continue.

■ To retrieve DTCs from a new vehicle:

- From the “Current Selection/
Select New Vehicle” screen, high­light Select New Vehicle and
press the ENTER/LD button;
the “Select V ehicle Year” menu dis­plays.

- Highlight the desired year, then
press the ENTER/LD button;
the “Enter the 8th digit of VIN”
menu displays.

- Highlight the 8th digit of the vehi­cle’s VIN, then press the

ENTER/LD button.

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GM OBD1 Systems

CODE RETRIEVAL PROCEDURE

If the “Enter 4th VIN Digit” screen displays (not applicable to
all vehicles), highlight the 4th digit of the vehicle’s VIN, then
press the ENTER/LD button.

- The “Current Selection/Select New Vehicle” screen displays
for your confirmation.

- If the information shown in the “Current Selection” field is cor­rect, highlight Current Selection, turn ignition key ON (DO
NOT start engine) and press the ENTER/LD button.
Proceed to step 4 to continue.

If the year shown is not correct, highlight Select New Vehicle
and press the ENTER/LD button to return to the “Select
Vehicle Year” menu to make your corrections.

4. When the CanOBD2&1 Scan Tool is in
the process of retrieving codes, a "One
moment please..." message shows on
the CanOBD2&1 Scan Tool’s display.

■ If the CanOBD2&1 Scan Tool fails to

link to the vehicle's computer, a
"Vehicle is not responding" message
shows on the CanOBD2&1 Scan
Tool’s display. Do the following:

- Verify the ignition is ON.

- Check the cable connections at
the CanOBD2&1 Scan Tool and at
the vehicle’s DLC.

- Turn the ignition OFF, wait 10-12
seconds, then turn back ON to
reset the computer.

- Press the ENTER/LD button
and repeat steps 3 and 4 as nec­essary.

5. If the CanOBD2&1 Scan Tool was able
to link to the vehicle successfully, a
"Code retrieval was successful..." message shows temporarily on
the CanOBD2&1 Scan Tool’s display, followed by any retrieved
DTCs.

■ The CanOBD2&1 Scan Tool will display a code only of codes are

present in the vehicle's computer memory. If no codes are pres­ent, a "No DTC's are presently stored in the vehicle's computer"
is displayed.

6. If more than one code was retrieved, press the DTC SCROLL
button, as necessary, to display additional codes one at a time.

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GM OBD1 Systems

CODE RETRIEVAL PROCEDURE

In the case of long code definitions, a small arrow is shown
in the upper.lower right-hand corner of the code display area
to indicate the presence of additional information. Use the

and buttons, as necessary, to view the additional

information.

Code 12 will always be present and it has one of the following mean­ings:

■ If code 12 is the only DTC retrieved and your vehicle "STARTS OK"

then code 12 indicates system "PASS" and all computer control
systems are functioning properly.

■ If code 12 is present and your vehicle "DOES NOT START", then it

may indicate a problem with the ignition control system.

7. Disconnect the CanOBD2&1 Scan Tool from the vehicle and turn
the ignition key OFF.

8. To prolong battery life, the CanOBD2&1 Scan Tool automatically
shuts "Off" after approximately three minutes with no button activi­ty. The DTCs retrieved will remain in the CanOBD2&1 Scan Tool's
memory, and may be viewed at any time. If the CanOBD2&1 Scan
Tool’s batteries are removed, or if the CanOBD2&1 Scan Tool is re­linked to a vehicle to retrieve codes, any prior codes in its memory
are automatically cleared.

■ See Viewing DTCs in the CanOBD2&1 Scan Tool’s Memory

on page 14 to view DTCs stored in the CanOBD2&1 Scan Tool’s
memory.

9. Follow the testing and repair procedures outlined in the vehicle's
service repair manual to correct "hard" DTCs. Codes should be
addressed and eliminated in the order they were received, erasing
(see Erasing DTC's on page 102) and retesting after each repair is
made to be sure the fault was eliminated.Code 12 will appear alone
when no other fault codes are present.

■ It may be necessary to test drive the vehicle to reset "hard" fault

codes 13, 15, 24, 44, 45, and 55 after they have been erased.

Whenever codes 51, 52, 54, or 55 are displayed with other
codes, troubleshoot and eliminate the "50 Series" codes first,
then proceed with the lower numbered codes.

The green, yellow and red LEDs are used (with the LCD dis­play) as visual aids to make it easier to determine engine sys­tem conditions. See Servicing Diagnostic Trouble Codes
on page 100 for information on interpreting LEDs and servic­ing DTCs.

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ON-BOARD VEHICLE DIAGNOSTICS / VEHICLES COVERED

ON-BOARD VEHICLE DIAGNOSTICS (OBD 1)

•

Beginning in 1988, California's Air Resources Board (CARB), and
later, the F ederal Gov ernment's Environmental Protection Agency
(EPA), required vehicle manufacturers to include a self diagnos­tic program capable of identifying an emissions-related fault via
the vehicles On-Board Computers (some manufacturers used
OBD before it was required). The first generation of Onboard
Diagnostics came to be known as OBD I.

•

OBD I is a set of self-testing or self-diagnosing instructions that
are programmed into the vehicle's on-board computer.

•

The program is specifically designed to detect failures in the sen­sors, actuators, switches and wiring of the various vehicle emis­sions-related systems (fuel injection system, ignition system,
EGR system, catalytic converter, etc.). If the computer detects a
failure in any one of these components or systems, it alerts the
driver by illuminating the "Check Engine" light on the dash.

•

The computer also assigns a numeric code (OBD I systems uti­lized a 2 or 3 digit code) for each specific problem that it detects,
and stores these codes in it's memory for later retrieval. The
codes can be retrieved from the computer's memory with the use
of a device called a "Tool" or a "Scan Tool".

With the exception of some 1994 and 1995 vehicles, most
vehicles from about 1982 to 1995 are equipped with OBD I
systems.

VEHICLES COVERED

The following tables identify the Toyota and Lexus OBD 1 vehicles that
are covered by the CanOBD2&1 Scan Tool.

DLC 1 Cars

Eng. Eng. DOHC/ DLC

Year Model Size Code SOHC Other Type

1995 Camry Coupe 2.2L 5S-FE DOHC 1
1992 Camry Sedan 2.2L 5S-FE DOHC 1
1992 Camry Sedan 3.0L 2VZ-FE DOHC 1
1993 Camry Sedan 3.0L 3VZ-FE DOHC 1
1993 Camry Sedan 2.2L 5S-FE DOHC 1
1994 Camry Sedan 2.2L 5S-FE DOHC 1
1993 Celica 2.0L 3S-GTE DOHC Turbo 1
1993 Celica 2.2L 5S-FE DOHC 1
1994 Celica 1.8L 7A-FE DOHC 1
1994 Celica 2.2L 5S-FE DOHC 1

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Toyota/Lexus OBD1 Systems

VEHICLES COVERED

DLC 2 Cars

Eng. Eng. DOHC/ DLC

Year Model Size Code SOHC Other Type

1992 Celica 2.2L 5S-FE DOHC A/T 1

Convertible
1992 Celica Coupe 1.6L 4A-FE DOHC 1
1992 Celica Coupe 2.2L 5S-FE DOHC A/T 1
1993 Celica Coupe 1.6L 4A-FE DOHC 1
1995 Celica Coupe 1.8L 7A-FE DOHC 1
1992 Celica Liftback 2.0L 3S-GTE DOHC Turbo 1
1992 Celica Liftback 2.2L 5S-FE DOHC 1
1993 Corolla Sedan 1.6L 4A-FE DOHC 1
1993 Corolla Sedan 1.8L 7A-FE DOHC 1
1994 Corolla Sedan 1.6L 4A-FE DOHC 1
1994 Corolla Sedan 1.8L 7A-FE DOHC 1
1993 ES-300 3.0L 3VZ-FE DOHC 1
1993 GS-300 3.0L 2JZ-GE DOHC 1
1993 LS-400 4.0L 1UZ-FE DOHC 1
1993 MR2 2.0L 3S-GTE DOHC Turbo 1
1993 MR2 2.2L 5S-FE DOHC 1
1994 MR2 2.0L 3S-GTE DOHC Turbo 1
1994 MR2 2.2L 5S-FE DOHC 1
1994 Paseo 1.5L 5E-FE DOHC 1
1995 Paseo 1.5L 5E-FE DOHC 1
1995 SC-300 3.0L 2JZ-GE DOHC 1
1991 Supra 3.0L 7M-GTE DOHC Turbo 1
1991 Supra 3.0L 7M-GE DOHC 1
1992 Supra 3.0L 7M-GTE DOHC Turbo 1
1992 Supra 3.0L 7M-GE DOHC 1
1993 Tercel Sedan 1.5L 3E-E SOHC 1
1994 Tercel Sedan 1.5L 3E SOHC 1

Eng. Eng. DOHC/ DLC

Year Model Size Code SOHC Other Type

1989 Cressida 3.0L 7M-GE DOHC 2
1990 Cressida 3.0L 7M-GE DOHC 2
1991 Cressida 3.0L 7M-GE DOHC 2
1992 Cressida 3.0L 7M-GE DOHC 2

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VEHICLES COVERED

DLC 1 Light Trucks

Eng. Eng. DOHC/ DLC

Year Model Size Code SOHC Other Type

1993 Camry 3.0L 3VZ-FE DOHC 2
1993 Supra 3.0L 2JZ-GTE DOHC Turbo 2
1993 Supra 3.0L 2JZ-GE DOHC 2
1994 Camry 3.0L 3VZ-FE DOHC 2
1994 Supra 3.0L 2JZ-GTE DOHC Turbo 2
1994 Supra 3.0L 2JZ-GE DOHC 2
1995 Supra 3.0L 2JZ-GTE DOHC Turbo 2
1995 Supra 3.0L 2JZ-GE DOHC 2
1992 SC-300 3.0L 2JZ-GE DOHC 2
1990 ES-250 2.5L 2VZ-FE DOHC 2
1991 ES-250 2.5L 2VZ-FE DOHC 2
1992 ES-300 3.0L 3VZ-FE DOHC 2
1992 SC-400 4.0L 1UZ-FE DOHC 2
1991 LS-400 4.0L 1UZ-FE DOHC 2
1992 LS-400 4.0L 1UZ-FE DOHC 2
1993 SC-400 4.0L 1UZ-FE DOHC 2
1994 SC-400 4.0L 1UZ-FE DOHC 2
1994 SC-300 3.0L 2JZ-GE DOHC 2
1993 SC-400 4.0L 1UZ-FE DOHC 2
1994 GS-300 3.0L 2JZ-GE DOHC 2
1994 ES-300 3.0L 1MZ-FE DOHC 2
1993 SC-300 3.0L 2JZ-GE DOHC 2

Eng. Eng. DOHC/ DLC

Year Model Size Code SOHC Other Type

1992 Previa 2.4L 2TZ-FE DOHC 1
1993 Previa 2.4L 2TZ-FE DOHC 1
1994 Previa 2.4L 2TZ-FE DOHC 1
1994 T100 3.0L 3VZ-FE SOHC 1
1995 4 Runner 2.4L 22R-E SOHC 1
1995 4 Runner 3.0L 3VZ-FE SOHC 1
1995 Pickup 2.4L 22R-E SOHC 1
1995 Pickup 3.0L 3VZ-FE SOHC 1
1995 Previa 2.4L 2TZ-FE DOHC 1

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Toyota/Lexus OBD1 Systems

DATA LINK CONNECTOR (DLC) / MIL

DATA LINK CONNECTOR (DLC)

Toyota vehicles are equipped with special Test Connectors that make
it possible to connect specialized testing equipment that communi­cates with the vehicle's onboard computer. The CanOBD2&1 Scan
Tool is designed for use with two types of Toyota DLC connectors;DLC
Number 1 and DLC Number 2, as described below.

The CanOBD2&1 Scan Tool's Toyota Connector Cable
Adaptor is designed to match the vehicle's DLC. Make sure
the adaptor mates properly before applying any force when
making the connection.Applying force to the connector when
not mated properly may cause damage to the connectors.

1. Type 1 connector is also known as Data Link Connector Number 1.
The type 1 DLC connector is a rectangular connector and is usual­ly black or gray in color. The connector is located under the hood
(engine compartment) in the following general locations:

■ Front corner (right or left)

■ Front corner (right or left)

■ Fender well (right or left)

■ Fire wall (right or left)

It has a cover labeled "DIAGNOSTIC", "DIAGNOSIS", or "CHECK
CONN", Use the square head of the Toyota Connector Cable
Adaptor on vehicles with this type of connector.

2. Type 2 connector is also known as Data
Link Connector (DLC) Number 2. The
type 2 DLC connector is a round con­nector and is usually black or gray in
color.

■ The connector is located "under the

dash" on the left hand side.

It may have a protective cap that needs to be removed before connect­ing the CanOBD2&1 Scan Tool's DLC.Use the round head of the T oy ota
Connector Cable Adaptor on vehicles with this type of connector.

INSTRUMENT PANEL MALFUNCTION INDICATOR LIGHTS (MIL)

Your vehicle's instrument panel has a Malfunction Indicator Light (MIL)
also called the "Check Engine" or "Service Engine soon" light.The MIL
is an indicator to warn the vehicle operator of a problem in the com­puter control system.

SERVICE

CHECK ENGINE

ENGINE

SOON

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DIAGNOSTIC TROUBLE CODES / CODE RETRIEVAL PROCEDURE

If your instrument panel indicator lights do not come on when
you turn on the ignition, please refer to your vehicle's service
manual.You may have problems in the car's circuitry.It is rec­ommended that you fix these problems before retrieving
DTCs from your vehicle’s computer.

DIAGNOSTIC TR OUBLE CODES

Diagnostic Trouble Codes, or Fault Codes, can be used to identify
engine systems or components that are malfunctioning.The computer
records codes for the following two types of engine problems:

■ "Hard" Diagnostic Trouble Codes

"Hard" DTCs represent problems that are occurring now and cause the
instrument panel Malfunction Indicator Lamp (MIL) or Check Engine
light to illuminate and remain on until the failure is repaired. A DTC is
stored in the vehicle's computer memory for each fault detected.A Tool
or Scanner can be used to retrieve DTCs that are stored in the vehi­cle's computer memory.

■ Intermittent/History DTCs

Intermittent/History DTCs are stored in the computer's memory for
problems that occur intermittently , or f or problems that happened in the
past but are not currently present. Intermittent DTCs may cause the
Malfunction Indicator light to flicker or stay on until the intermittent mal­function goes away. However, the corresponding fault code will be
stored in memory as a history DTC. If the malfunction that caused the
history DTC to set does not recur within a predetermined length of time
(usually within 40-80 ignition key start cycles), the computer will auto­matically erase the related fault code from its memory.

CODE RETRIEVAL PROCEDURE

Never replace a par t based only on the DTC definition.

Each DTC has a set of testing procedures, instructions and
flow charts that must be followed to confirm the location of
the problem.This information is found in the vehicle's service
manual. Always refer to the vehicle's service manual for
detailed testing instructions.

Retrieving and using Diagnostic Trouble Codes (DTCs)

for troubleshooting vehicle operation is only one part

of an overall diagnostic strategy.

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Toyota/Lexus OBD1 Systems

CODE RETRIEVAL PROCEDURE

Check your vehicle thoroughly before performing any test.
See Before You Begin on page 18 for details.

ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more infor­mation.

1. Locate the vehicle's Data Link Connector (DLC). See Data Link
Connector (DLC) on page 96 for connection location.

Some DLCs have a plastic cov er that must be remov ed bef ore
connecting the CanOBD2&1 Scan Tool's cable connector.

2. Connect the CanOBD2&1 Scan Tool cable (with the Toyota
Connector Cable Adaptor attached) to the CanOBD2&1 Scan Tool,
then connect the adaptor to the vehicle’s DLC. Press the

POWER/LINK button to turn the CanOBD2&1 Scan Tool ON.

3. Turn ignition ON and star t engine. Warm engine to operating tem-

perature. (Shut engine off after warm up).

4. When prompted by the CanOBD2&1 Scan Tool, do the following
before proceeding to step 5:

■ Turn ignition ON. DO NOT start the

engine.

■ Make sure throttle is closed.

■ Set gear lever in "park" (for automatic transmissions) or “neutral”

for manual transmissions.

■ Turn off all accessories.

5. Press the ENTER/LD button to continue.

■ The CanOBD2&1 Scan Tool will begin the code retrieval process.

6. When the CanOBD2&1 Scan Tool is in
the process of retrieving codes, a "One
moment please..." message shows on
the CanOBD2&1 Scan Tool’s display.

■ If the CanOBD2&1 Scan Tool fails to

link to the vehicle’s computer a
“Vehicle is not responding” message
shows on the CanOBD2&1 Scan
Tool’s display. Do the following:

- Verify the ignition is ON.

- Check the cable connections at
the CanOBD2&1 Scan Tool and at
the vehicle’s DLC.

- Turn the ignition OFF, wait 10-12
seconds, then turn back ON to reset the computer.

- Press the ENTER/LD button and repeat steps 3 through
5 as necessary.