Test G: The Traction Control System Cannot Be Disabled

Pinpoint Test G: The Traction Control System Cannot Be Disabled

Normal Operation
For all wheel drive (AWD) vehicles, traction control is controlled through the ABS module and the PCM. When the ABS module detects a traction event, the module sends a message over the high-speed controller area network (HS-CAN) bus to the PCM modulate the engine torque and for the instrument cluster to flash the traction control indicator, The PCM modulates engine torque by regulating fuel and spark to the cylinders. Once the traction event is over, the ABS module stops sending the messages to the PCM and cluster.

For front wheel drive (FWD) vehicles, traction control is controlled only by the PCM. The ABS module sends the PCM wheel speed sensor information so the PCM can determine when and if a traction event is taking place. When the PCM senses a traction event is taking place, it modulates the engine torque by regulating fuel and spark to the cylinders and it also sends the instrument cluster a message over the HS-CAN bus to flash the traction control indicator. The traction control indicator informs the driver that a traction control event is taking place.

The traction control system can be disabled by pressing the traction control switch located on the instrument panel. When the system is disabled, the traction control system indicator in the instrument cluster will illuminate solidly.

The instrument cluster sends 5 volts to the traction control switch along circuit CCA15 (YE/GY). When the traction control switch is pressed, this voltage is sent through the switch and to ground along circuit GD116 (BK/VT).
^ DTC C1093 Traction Control Disable Switch Circuit Failure - If the traction control switch closed for more than 2 minutes or if there is a short to ground on circuit CCA15 (YE/GY) during normal operation, DTC C1093 will be set. If the traction control switch closed during the instrument cluster self-test and for more than 2 minutes in during normal operation, DTC C1093 will be set.

This pinpoint test is intended to diagnose the following:
^ Wiring, terminals or connectors
^ Hazard/PAD/traction switch
^ Instrument cluster

G1-G3:

G3 (Continued)-G5:

G6-G8: