Greater than/Equal to 3900 kg (8600 lb) GVW

Symptoms - Antilock Brake System

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


1. Perform the ABS 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 ABS (Greater than/Equal to 3900 kg (8600 lb) GVW).


Visual/Physical Inspection

* Inspect for aftermarket devices which could affect the operation of the ABS. Refer to Checking Aftermarket Accessories Checking Aftermarket Accessories.
* 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 Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections.

Symptom List

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

* ABS Indicator Malfunction Greater than/Equal to 3900 kg (8600 lb) GVW
* StabiliTrak Indicator Malfunction Non-Hybrid Greater than/Equal to 3900 kg (8600 lb) GVW