A Symptoms - Antilock Brake System
Important: The following steps must be completed before using the symptom tables.1. Perform A 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 the following procedures:
^ ABS Description
^ ABS Operation
Visual/Physical Inspection
^ Inspect for aftermarket devices which could affect the operation of the antilock brake system Refer to Checking Aftermarket Accessories.
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ ABS Indicator Always On
^ ABS Indicator Inoperative
^ Scan Tool Displays Undefined DTC