General Information

Important: The following steps must be 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.

Symptom List
Refer to the following Non-Trouble Code Diagnostic Procedures in order to diagnose by symptom:
- ABS Indicator Always On ABS Indicator Lamp Always ON, No DTCs
- ABS Indicator Inoperative ABS Indicator Lamp Always OFF, No DTCs