Preliminary inspections

Important: The following steps must be completed before using the symptom tables
^ Perform the 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.
^ Review the system operation in order to familiarize yourself with the system functions. Refer to ABS Description.

Visual/Physical Inspection
^ Inspect for aftermarket devices which could affect the operation of the ABS System.
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
^ Inspect the brake fluid reservoir for the proper brake fluid level.

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

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ No Communication with EBCM/EBTCM
No Communication With EBCM/EBTCM

^ ABS Indicator Always On
ABS Indicator Always On

^ ABS Indicator Inoperative
ABS Indicator Inoperative

^ TRACTION ACTIVE Message Always On
Traction Active Message Always On

^ SERVICE TRACTION SYSTEM Message Always On
Service Traction System Message Always On

^ TRAC OFF Indicator Always On
Traction Off Indicator Always On

^ TRAC OFF Indicator Inoperative
Symptom Related Diagnostic Procedures