Troubleshooting Guide: Self-Diagnosis

The ABS control unit starts self-diagnostic functions after the ignition is switched ON. The ABS control unit detects failure for each circuit and component by comparing condition of the system with limited condition set inside the ABS control unit. The ABS control unit stores the failure code and then outputs the two-digit malfunction code to the diagnostic scan tool (Hi/Scan pro) when the ABS data link connector is connected.