The instrument panel cluster (IPC) illuminates the traction off indicator by supplying ground to the lamp. The electronic brake control module (EBCM) sends a serial data messages to the IPC, in order to command the indicator ON or OFF.

Important: Diagnose all vehicle DTCs before using this diagnostic.

1. With the scan tool, select instrument panel special functions Lamp Test. Command the instrument panel warning lamps ON.

⇒	If the ABS warning lamp does not turn on, replace the IPC.

2. Turn the ignition OFF. Disconnect the traction control switch harness connector. Turn the ignition ON. Touch and release a 3-amp fused jumper wire between ground and the Traction Control System (TCS) switch signal circuit.

⇒	If the traction off indicator illuminates, replace the traction control switch.

3. Disconnect the body control module (BCM) harness connector. Touch and release a 3A fused jumper wire between ground and the TCS switch signal circuit at the BCM.

⇒	If the traction off indicator illuminates, repair an open in the TCS switch signal circuit.

⇒	If the traction off indicator does not illuminate replace the BCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM, IPC, or BCM replacement, setup, and programming