Normal Operation

The traction control system can be disabled by the driver pressing the traction control switch located in the instrument panel next to the hazard flasher switch. The traction control switch is a normally-open momentary contact switch and is hard-wired to the instrument cluster along circuit 1412 (WH/PK). The switch is grounded along circuit 1205 (BK). When the traction control switch is pressed, circuit 1412 (WH/PK) and circuit 1205 (BK) are momentarily connected together. The instrument cluster detects this ground and sends a voltage to the traction control switch through circuit 939 (VT) to illuminate the traction control switch at the same time the instrument cluster sends a message over the High Speed Controller Area Network (HS-CAN) bus to the ABS module to disable the traction control system. The system will remain disabled until the traction control switch is pressed again or when the ignition key is cycled from ON to OFF and then back to ON again.

• DTC C1093 Traction Control Disable Switch Circuit Failure - If during the instrument cluster on-demand self test the instrument cluster detects a short to ground on circuit 1412 (WH/PK), then DTC C1093 will be set. This is usually due to the traction control switch being pressed during the self-test.

This pinpoint test is intended to diagnose the following:

• Wiring, terminals or connectors
• Traction control switch
• Instrument cluster
• ABS module