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.