Normal Operation

Engine torque modulation is achieved by regulating fuel and spark to the cylinders. The stability assist 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 to the stability assist switch through circuit 640 (RD/YE). The signal from the stability assist switch is sent to the ABS module through circuit 959 (GY).