Jeep KJ Liberty Cherokee 2003 User Manual

TABLE OF CONTENTS
1.0 INTRODUCTION .........................................................1
1.1 SYSTEM COVERAGE ...............................................1
1.2 SIX-STEP TROUBLESHOOTING PROCEDURE ..........................1
2.0 IDENTIFICATION OF SYSTEM .............................................1
3.0 SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION ......................1
3.1 TEVES MARK 20e SYSTEM DESCRIPTION .............................1
3.1.1 PEDAL FEEL/VEHICLES CHARACTERISTICS ...................2
3.1.2 SYSTEM COMPONENTS.....................................2
3.1.3 ABS AND RED BRAKE WARNING INDICATOR...................2
3.1.4 CONTROLLER ANTILOCK BRAKE (CAB) .......................2
3.1.5 HYDRAULIC CONTROL UNIT .................................3
3.1.6 SENSORS .................................................3
3.2 ABS DIAGNOSTIC TROUBLE CODES ..................................4
3.2.1 SYSTEM INITIALIZATION.....................................4
3.2.2 DIAGNOSTIC MODE ........................................4
3.2.3 INTERMITTENT DIAGNOSTIC TROUBLE CODES ................4
3.2.4 FREEZE FRAME............................................4
3.3 USING THE DRBIIIT .................................................4
3.4 DRBIIIT ERROR MESSAGES .........................................4
3.4.1 DRBIIIT DOES NOT POWER UP (BLANK SCREEN)...............4
3.4.2 DISPLAY IS NOT VISIBLE ....................................5
4.0 DISCLAIMERS, SAFETY, WARNINGS .......................................5
4.1 DISCLAIMERS......................................................5
4.2 SAFETY ...........................................................5
4.2.1 TECHNICIAN SAFETY INFORMATION..........................5
4.2.2 VEHICLE PREPARATION FOR TESTING........................5
4.2.3 SERVICING SUB-ASSEMBLIES ...............................5
4.2.4 DRBIIIT SAFETY INFORMATION...............................5
4.3 WARNING .........................................................6
4.3.1 VEHICLE DAMAGE WARNINGS ...............................6
4.3.2 ROAD TESTING A COMPLAINT VEHICLE .......................6
4.4 DIAGNOSIS................................................6
5.0 REQUIRED TOOLS AND EQUIPMENT ......................................7
6.0 GLOSSARY OF TERMS...................................................7
7.0 DIAGNOSTIC INFORMATION AND PROCEDURES ............................9
BRAKES (CAB)
BUS SYSTEM COMMUNICATION FAILURE .................................10
CAB INTERNAL FAILURE ................................................12
CLUSTER LAMP FAILURE................................................14
G-SENSOR FAILURE ....................................................16
LEFT FRONT SENSOR CIRCUIT FAILURE ..................................17
REAR SENSOR CIRCUIT FAILURE ........................................17
RIGHT FRONT SENSOR CIRCUIT FAILURE.................................17
LEFT FRONT WHEEL SPEED SIGNAL FAILURE .............................22
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Jeep KJ Liberty Cherokee 2003 Specifications

General

Brand	Jeep
Model	KJ Liberty Cherokee 2003
Category	Automobile
Language	English

Summary

1.0 INTRODUCTION

1.1 SYSTEM COVERAGE

Covers the Teves Mark 20e Antilock Braking System (ABS) on the Jeep Liberty.

1.2 SIX-STEP TROUBLESHOOTING PROCEDURE

Outlines the six basic steps for diagnosing the antilock brake system.

2.0 IDENTIFICATION OF SYSTEM

3.0 SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION

3.1 TEVES MARK 20e SYSTEM DESCRIPTION

Explains how the CAB monitors wheel speeds and modulates hydraulic pressure to prevent wheel lock-up.

3.2 ABS DIAGNOSTIC TROUBLE CODES

Explains how DTCs are stored and erased by the ABS module.

3.3 USING THE DRBIII®

Refers to the DRBIII® user's guide for operating the diagnostic tool.

3.4 DRBIII® ERROR MESSAGES

Details how to handle DRBIII® error messages and when to contact the STAR Center.

4.0 DISCLAIMERS, SAFETY, WARNINGS

4.1 DISCLAIMERS

States that information is based on the latest publication and subject to change.

4.2 SAFETY

Covers safety precautions for technicians and vehicle operations.

4.3 WARNING

General warnings related to vehicle operation and testing.

4.4 DIAGNOSIS

Provides a step-by-step guide for diagnosing ABS issues.

5.0 REQUIRED TOOLS AND EQUIPMENT

6.0 GLOSSARY OF TERMS

7.0 DIAGNOSTIC INFORMATION AND PROCEDURES

8.0 COMPONENT LOCATIONS

8.1 CONTROLLER ANTILOCK BRAKE, HYDRAULIC CONTROL UNIT, PUMP MOTOR

Locates the main ABS control unit, HCU, and pump motor assembly.

8.2 WHEEL SPEED SENSORS

Shows the location of front and rear wheel speed sensors.

8.3 WHEEL SPEED SENSOR CONNECTORS

Illustrates the locations of front and rear wheel speed sensor connectors.

8.4 BRAKE LAMP SWITCH

Shows the location of the brake lamp switch.

8.5 BRAKE LAMP SWITCH CONNECTOR

Shows the location of the brake lamp switch connector.

9.0 CONNECTOR PINOUTS

BRAKE LAMP SWITCH CONNECTOR PINOUTS

Details the pin assignments for the brake lamp switch connector.

CONTROLLER ANTILOCK BRAKE CONNECTOR PINOUTS

Provides the pin assignments for the CAB connector.

DATA LINK CONNECTOR PINOUTS

Details the pin assignments for the data link connector.

LEFT FRONT WHEEL SPEED SENSOR CONNECTOR PINOUTS

Details the pin assignments for the LF wheel speed sensor connector.

PUMP MOTOR CONNECTOR PINOUTS

Details the pin assignments for the pump motor connector.

REAR WHEEL SPEED SENSOR CONNECTOR PINOUTS

Details the pin assignments for the rear wheel speed sensor connector.

RIGHT FRONT WHEEL SPEED SENSOR CONNECTOR PINOUTS

Details the pin assignments for the RF wheel speed sensor connector.

10.0 SCHEMATIC DIAGRAMS