Initial Inspection and Diagnostic Overview

The anti-lock brake control 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. Pinout Values and Diagnostic Parameters

The anti-lock brake control module monitors system operation and can store all defined Diagnostic Trouble Codes (DTCs) in its memory. It is important to understand that the anti-lock brake control module cannot recognize some failures. Therefore, if a symptom exists and no DTCs are stored by the anti-lock brake control module, other diagnostic steps must be followed.

The anti-lock brake control module cannot store a DTC if there is no power to the module. This condition can be found by using the Quick Check Sheet. Pinout Values and Diagnostic Parameters

A 20 series code 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 anti-lock brake control module due to improper erasing procedures, the code will be output during on-board diagnostics but the next code will also be output.