Abs Telltale
NOTE:
ABS/TCS is disabled whenever the ABS telltale is on.
When ignition is switched on, the Electronic Brake and Traction Control Module (EBTCM) performs a self-diagnostic routine while the I/P cluster performs a bulb-check by illuminating the ABS telltale for approximately 3 seconds.
Once the EBTCM determines the state of the ABS, it transmits a CAN serial data message to the BCM. The BCM then transmits a Class II serial data message to the I/P cluster to command the ABS telltale on or off, depending on the state of the ABS. In the event of a Class II serial data loss, the ABS telltale will be on.