A Symptoms - Antilock Brake System

Antilock Brake System

Diagnostic Information and Procedures

Symptoms - Antilock Brake System

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

1. Perform the ABS Diagnostic System Check 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 control modules can communicate via the serial data link.
2. Review the system description and operation in order to familiarize yourself with the system functions. Refer to ABS Description and Operation (Over 8600 GVW)ABS Description and Operation (8600 GVW or less).

Visual/Physical Inspection

Inspect for aftermarket devices which could affect the operation of the ABS. 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.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer Testing for Intermittent and Poor Connections in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

Traction Off Indicator Always On Traction Off Indicator Always On

Traction Off Indicator Inoperative Symptom Related Diagnostic Procedures

ABS Indicator Always On ABS Indicator Always On

ABS Indicator Inoperative ABS Indicator Inoperative

Low Traction Indicator Always On Low Traction Indicator Always On

Low Traction Indicator Inoperative Low Traction Indicator Inoperative