A Symptoms - Antilock Brake System

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

1. Perform A Diagnostic System Check before using the Symptom Tables in order to verify that all of the following are true:
^ There are no DTCs set.
^ The EBCM can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to ABS Operation.


Visual/Physical Inspection

^ Inspect for aftermarket devices which could affect the operation of the ABS System. Refer to Checking Aftermarket Accessories in Diagrams, Diagnostic Aids.
^ Inspect the easily accessible or visible system components for obvious damage or conditions 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. Refer to Testing for Intermittent and Poor Connections in Diagrams, Diagnostic Aids.


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