ABS Light: Description and Operation

The ABS warning light receives battery voltage with the Ignition Switch (X134) in position II. This warning light is earthed by the Anti-Lock Brake System ECU (Z108) or the ABS Warning Relay (K103) in the event of an ABS problem. The Warning Lamps Check Unit (Z161) applies ground to the warning light momentarily as a bulb check when the Ignition Switch (X134) is moved to position II.