A Symptoms - Antilock Brake System

Antilock Brake System

Diagnostic Information and Procedures

Symptoms - Antilock Brake System

Important: The following steps must be completed before using the symptom tables.

1. Perform the ABS Diagnostic System Check before using the symptom tables in order to verify that all of the following are true:
- There are no DTC's set.
- The control modules can communicate via the serial data link.
2. Review the system description and operation in order to familiarize yourself with the system functions. Refer to:

- ABS Description and Operation (W/O JL4)

ABS Description and Operation (W/O JL4)

- ABS Description and Operation (W/JL4).

ABS Description and Operation (W/JL4)

Visual/Physical Inspection

- Inspect for after market devices, which could affect the operation of the ABS. Refer to Checking Aftermarket Accessories in Wiring Systems.
- Inspect the easily accessible or visible system components for obvious damage or conditions, which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer Testing for Intermittent and Poor Connections in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

- ABS Indicator Always On

ABS Indicator Always On

- ABS Indicator Inoperative

ABS Indicator Inoperative

- Stability System Disabled Indicator Always On

Stability System Disabled Indicator Always On

- Traction Off Indicator Always On

Traction Off Indicator Always On

- Traction Off Indicator Inoperative

Symptom Related Diagnostic Procedures

- Traction Control System Poor Performance

Traction Control System Poor Performance

- Vehicle Stability Enhancement System Poor Performance

With Vehicle Stability Enhancement System