ABS Light: Description and Operation

The amber ABS warning lamp is located on the left side of the instrument panel in the instrument cluster. The purpose of the warning lamp is discussed in detail below.
When the ignition key is turned to the ON position, the amber ABS warning lamp is lit until the CAB completes its self-tests and turns off the lamp (approximately 4 seconds). The amber ABS warning lamp will illuminate when the CAB detects a condition that results in the shutdown of ABS function or when the instrument cluster does not receive messages from the CAB. The CAB sends a message across the PCI BUS circuit that informs the instrument cluster to turn on the amber ABS warning lamp.
Under most conditions, when the amber ABS warning lamp is on, only the ABS function of the brake system is affected; the base brake system and the ability to stop the vehicle are not affected.