Chassis Diagnostic Procedures - Anti-Lock Brake System: Introduction: Notes

The procedures contained in this article include all the specifications, and graphics needed to diagnose the Teves Mark 20e Antilock Braking System (ABS) and the Mark 20e with Traction Control. The diagnostics in this article are based on the failure condition or symptom being present at time of diagnosis.

Please follow the recommendations below when choosing your diagnostic path.

1. First make sure the DRBIII® is communicating with the CAB. If the DRBIII® displays a "No Response" condition, you must diagnose that first.
2. Read DTC's (diagnostic trouble codes) with the DRBIII®.
3. If no DTC's are present, identify the customer complaint.
4. Once the DTC or customer complaint is identified, locate the matching test in DIAGNOSTIC INFORMATION & PROCEDURES  and begin to diagnose the symptom.

All component location views are in COMPONENT LOCATIONS . All connector pinouts are in CONNECTOR PINOUTS . All schematics are in SYSTEM WIRING DIAGRAMS .

An asterisk (*) placed before the symptom description indicates a customer complaint. When repairs are required, refer to the appropriate service information for the proper removal and repair procedure.

Diagnostic procedures change every year. New diagnostic systems may be added; carry over systems may be enhanced. READ THIS INFORMATION BEFORE TRYING TO DIAGNOSE A VEHICLE CODE. It is recommended that you review the entire introduction section to become familiar with all new and changed diagnostic procedures.