Diagnostic Procedures Overview

The anti-lock brake/traction assist system ABS module is capable of performing an on-board diagnostic using Rotunda SUPER STAR II Tester 007-0041B or equivalent.

If the SUPER STAR II Tester is not available, the Anti-Lock Quick Check Sheet should be used.

The anti-lock/traction assist control module monitors system operation and can store all defined Diagnostic Trouble Codes (DTC's) in its memory. It is important to understand that the ABS module CANNOT recognize some failures; therefore if a symptom exists and no DTC's are stored by the ABS module, other diagnostic steps must be followed.

The module cannot store a DTC if there is no power to the module. This malfunction can be found by using the Quick Check Sheet.

Codes 18,19 and 20 will override any other stored code and will not allow other codes to be output if the failure exists while the on-board diagnostic is being run. If the failure is intermittent or if the code was left in the ABS module due to improper erasing procedures, the code will be output during on-board diagnostic but the next code will also be output.