System Self Test (Initialization)

During initialization, the Electronic Brake Control Module/Electronic Brake Traction Control Module (EBCM/EBTCM) will not only perform self-diagnostics, but will also verify motor, modulator, solenoid, relay, and indicator operation to ensure all components are functioning properly. The EBCM/EBTCM also checks the wheel speed sensor circuitry for open circuits and shorts to ground or voltage at this time. If the EBCM/EBTCM detects a malfunction in either itself or other Antilock Brake System (ABS) VI components, it will store a Diagnostic Trouble Code (DTC) and turn on the amber ABS warning indicator if applicable.

The amber ABS warning indicator will be on for approximately three seconds with the key in the RUN position. During cranking, the amber ABS warning indicator will be on and then remain on for about three seconds after the engine starts. A slight mechanical noise may be heard during the system initialization, which is normal. This initialization is performed during engine cranking and engine starting. If your foot is on the brake pedal when the engine is started, the system will not initialize until your foot is removed or 5 km/h (3 mph) is reached. If foot pressure on the pedal interrupts the system initialization, a slight movement in the pedal may be felt.