Normal Operation

Engine torque modulation is achieved by regulating fuel and spark to the cylinders. The traction control system operates using the anti-lock brake system (ABS) module to interact with the powertrain control module (PCM) to reduce engine torque if one or both rear wheels lose traction and begin to spin during acceleration.

Voltage is supplied by the instrument cluster to the traction control switch through circuit 1412 (WH/PK). The signal is grounded through the traction control switch on circuit 1205 (BK). The instrument cluster then sends a traction control disable command over the standard corporate protocol (SCP) network.