ABS

The anti-lock indicator is a LED display that is located in the instrument cluster. The anti-lock indicator is operated by the Electronic Brake Control Module (EBCM) module. The instrument cluster turns ON the anti-lock indicator for 3 seconds when the ignition switch is turned to the RUN position. The EBCM module then sends a class 2 serial data message to the instrument cluster to turn OFF the anti-lock indicator as soon as the 3 second bulb check is complete.

The anti-lock indicator will also turn ON when one of the following actions occurs:
^ The instrument cluster receives a class 2 serial data message from the EBCM module requesting the anti-lock indicator be turned ON.
^ The instrument cluster can not communicate with the EBCM module using class 2 serial data communications.
^ A Diagnostic Trouble Code (DTC) is stored related to the system malfunction.

The red brake indicator also turns ON for 3 seconds when the ignition switch is turned to the RUN position. Both the BCM and the EBCM can instruct the instrument cluster to turn ON the red brake indicator. The EBCM module will request the instrument cluster to turn the red brake indicator ON when one of the following actions occurs:
^ The EBCM module can not control the anti-lock indicator.
^ The instrument cluster receives a class 2 serial data message from the EBCM requesting that the red brake indicator be turned ON.

Refer to Anti-lock Brakes for more information about the anti-lock brake system.