Traction Off Indicator Inoperative

Circuit Description
The TRAC OFF indicator is controlled by the instrument cluster via class 2 serial data messages from the EBCM. When the BCM sees the enhanced traction control switch input grounded through the momentary ETS switch, it sends a class 2 message to the EBCM that tells the EBCM that the ETS switch has been pressed. The EBCM then disables the ETS and sends a message to the instrument cluster to turn the TRAC OFF indicator ON. Each time the ignition is cycled from OFF to ON, the ETS is enabled.

Diagnostic Aids
The following conditions will cause the TRAC OFF indicator to illuminate:
^ The EBCM has disabled the ETS due to a DTC.
^ The driver manually disabled the ETS via the ETS switch.
^ The instrument cluster bulb check. When the ignition switch is turned to ON, the TRAC OFF indicator will turn on for approximately 3 seconds and then turn OFF.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This test ensures that the instrument panel cluster can operate the TRAC OFF indicator.
3. This test ensures that the BCM is receiving a signal from the ETS switch.