Jeep WG Grand Cherokee 2002 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 ABS 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 ADJUSTABLE PEDALS SYSTEM DESCRIPTION .........................4
3.3 DIAGNOSTIC TROUBLE CODES ......................................4
3.3.1 ABS INITIALIZATION ........................................4
3.3.2 DIAGNOSTIC MODE ........................................4
3.3.3 INTERMITTENT DIAGNOSTIC TROUBLE CODES ................5
3.4 USING THE DRBIIIT .........................................5
3.5 DRBIIIT ERROR MESSAGES .................................5
3.5.1 DRBIIIT DOES NOT POWER UP (BLANK SCREEN)...............5
3.5.2 DISPLAY IS NOT VISIBLE ....................................5
4.0 DISCLAIMERS, SAFETY, WARNINGS .......................................5
4.1 DISCLAIMERS......................................................5
4.2 SAFETY ...........................................................6
4.2.1 TECHNICIAN SAFETY INFORMATION..........................6
4.2.2 VEHICLE PREPARATION FOR TESTING........................6
4.2.3 SERVICING SUB-ASSEMBLIES ...............................6
4.2.4 DRBIIIT SAFETY INFORMATION...............................6
4.3 WARNING .........................................................7
4.3.1 VEHICLE DAMAGE WARNINGS ...............................7
4.3.2 ROAD TESTING A COMPLAINT VEHICLE .......................7
4.4 DIAGNOSIS................................................7
5.0 REQUIRED TOOLS AND EQUIPMENT ......................................7
6.0 GLOSSARY OF TERMS...................................................7
7.0 DIAGNOSTIC INFORMATION AND PROCEDURES ............................9
ADJUSTABLE PEDALS
PEDAL SENSOR OPEN/SHORTED TO BATTERY ............................10
PEDAL SENSOR SHORTED TO GROUND ..................................12
PEDAL SW STUCK FORWARD............................................13
PEDAL SW STUCK REARWARD ..........................................15
SYSTEM OVER VOLTAGE................................................17
SYSTEM UNDER VOLTAGE ..............................................18
*CAN’T ADJUST PEDALS ................................................19
*CAN’T SET/RECALL MEMORY POSITIONS.................................21
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Jeep WG Grand Cherokee 2002 Specifications

General

Brand	Jeep
Model	WG Grand Cherokee 2002
Category	Automobile
Language	English

Summary

1.0 INTRODUCTION

1.1 SYSTEM COVERAGE

Details the scope of the diagnostic manual for Teves Mark 20 ABS and Adjustable Pedals.

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 ABS SYSTEM DESCRIPTION

Describes the Controller Antilock Brake (CAB) module, its functions, and hydraulic operations.

3.1.2 SYSTEM COMPONENTS

Lists the main components of the Antilock Brake System including HCU, sensors, and pump.

3.1.4 CONTROLLER ANTILOCK BRAKE (CAB)

Details the microprocessor-based CAB, its monitoring, and control functions.

3.1.6 SENSORS

Explains the function and operation of wheel speed sensors and tone wheels.

3.2 ADJUSTABLE PEDALS SYSTEM DESCRIPTION

Describes the Adjustable Pedals System (APS), its features, and operation.

3.3 DIAGNOSTIC TROUBLE CODES

Explains how diagnostic trouble codes (DTCs) are set, retained, and erased.

3.5 DRBIII® ERROR MESSAGES

Details the error messages displayed by the DRBIII diagnostic tool.

4.0 DISCLAIMERS, SAFETY, WARNINGS

4.2 SAFETY

General safety precautions for technicians working on vehicles.

4.2.1 TECHNICIAN SAFETY INFORMATION

Specific safety warnings for technicians, including ventilation and personal protection.

4.3.1 VEHICLE DAMAGE WARNINGS

Precautions to prevent damage to vehicle modules and components during testing.

4.4 DIAGNOSIS

Step-by-step guide for initiating the diagnostic process for ABS systems.

5.0 REQUIRED TOOLS AND EQUIPMENT

6.0 GLOSSARY OF TERMS

7.0 DIAGNOSTIC INFORMATION AND PROCEDURES

PEDAL SENSOR OPEN/SHORTED TO BATTERY

Troubleshooting steps for pedal sensor open or shorted to battery condition.

PEDAL SW STUCK FORWARD

Diagnostic procedure for when the adjustable pedal switch is stuck in the forward position.

SYSTEM OVER VOLTAGE (APM)

Troubleshooting for system overvoltage detected by the Adjustable Pedals Module.

BRAKE FLUID LEVEL SWITCH

Diagnostic steps for issues related to the brake fluid level switch circuit.

CONTROLLER FAILURE

Troubleshooting steps for a failure detected within the ABS Controller (CAB).

LEFT FRONT SENSOR CIRCUIT FAILURE

Diagnosing circuit failures for the left front wheel speed sensor.

PUMP MOTOR CIRCUIT NOT WORKING PROPERLY

Steps to diagnose issues with the ABS pump motor circuit operation.

SYSTEM OVERVOLTAGE (CAB)

Troubleshooting for system overvoltage detected by the Controller Antilock Brake.

SYSTEM UNDERVOLTAGE

Diagnosing system undervoltage conditions monitored by the CAB.