Traction Control Indicator Lamp: Description and Operation

When the Electronic Brake Control Module (EBCM) needs to illuminate the ETS OFF or LO TRAC indicator lamps, it will transmit a signal (via serial data link) to the Electronic Instrument Panel Cluster (IPC) and the IPC will illuminate the indicator lamp. The amber ETS OFF indicator lamp will be illuminated when ETS is disabled or when the driver switches ETS off with the ETS switch. As a bulb check procedure, the EBCM will command the ETS indicator lamp ON for 3 seconds when the EBCM receives power (ignition in RUN position). With the ignition in the OFF/UNLOCK or START positions (loss of serial data), the IPC will illuminate the ETS OFF indicator lamp. The amber LO TRAC indicator lamp will be illuminated to alert the driver of a low traction situation and to inform the driver the ETS is operating. As a bulb check procedure, the EBCM will command the LO TRAC indicator lamp ON for 3 seconds when the EBCM receives power (ignition in RUN or START positions). With the ignition in the OFF/UNLOCK position (loss of serial data), the IPC will illuminate the LO TRAC indicator lamp.