O: Stability Assist Cannot Be Disabled

Pinpoint Test 0: Stability Assist Cannot Be Disabled

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 traction control switch through circuit 1003 (GY/YE). The signal from the traction control switch is sent to the ABS module through circuit 959 (GY).

Possible Causes
^ circuit 959 (GY) open or short to voltage
^ traction control switch
^ ABS module

Tests O1 - O3:

Tests O3 - O4:

PINPOINT TEST 0: THE STABILITY ASSIST CANNOT BE DISABLED

CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.