System Check Sound

When starting the engine, a thudding sound can sometimes be heard coming from the engine compartment. This is a normal sound during the ABS self-check.

If the ABS hydraulic unit is faulty, the ABS-ECU must be replaced.

The ABS-ECU runs a self-check for 3 seconds upon start-up (also ignition switch ON, engine stopped).

The ABS warning light, TCL warning light, and TCL indicator light should be illuminated during the self-check and turn off when the self-check completes.