Preliminary inspections

Symptom - Antilock Brake System





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

1. Perform the Diagnostic System Check - ABS before using the Symptom Tables in order to verify that all of the following are true:
^ There are no DTCs set.
^ The control module(s) can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to ABS Description and Operation.

Visual/Physical Inspection
^ Inspect for aftermarket devices, which could affect the operation of the antilock brake system.
^ Inspect the easily accessible or visible system components for obvious damage or, which could cause the symptom.
^ Inspect the master cylinder reservoir for the proper brake fluid level.

Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ ABS Indicator Inoperative
^ ABS Indicator Always On
^ Traction Off Indicator Always On
^ Traction Off Indicator Inoperative