A Symptoms - Antilock Brake System

Symptoms - 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. Description and Operation

Visual/Physical Inspection
Inspect for aftermarket devices which could affect the operation of the antilock brake system. 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.
^ 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 intermiffent 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 Inoperative
^ Traction Control Indicator Always On
^ Traction Control Indicator Inoperative
^ Traction Off Indicator Inoperative
^ Vehicle Stability Enhancement System Inoperative
^ Vehicle Stability Enhancement System Unwanted Activation
^ Vehicle Stability Enhancement System Excessive Brake Pulsation