Normal Operation and Fault Conditions

The PSCM calculates steering wheel rotation speed, angle and direction of rotation and sends the information to the ABS module over the FD-CAN. A failure of the FD-CAN, the PSCM or the internal sensors causes the ABS module to set one or more DTCs are set and the ABS warning indicator is illuminated.

PPT LA ABS MODULE FAULT TRIGGER CONDITIONS

DTC	Description	Fault Trigger Conditions
C0051:64	Steering Wheel Position Sensor: Signal Plausibility Failure	Sets when the ABS module detects the difference between the steering wheel angle signal and the calculated reference signal is too high or if the steering wheel angle sensor does not match other stability control sensor inputs (yaw rate, lateral acceleration, longitudinal acceleration, roll rate).
C0051:67	Steering Wheel Position Sensor: Signal Incorrect After Event	Sets when the ABS module detects the center position of the steering wheel cannot be determined after 30 seconds of driving at a speed between 14.4 km/h (9 mph) and 48 km/h (30 mph).
C0051:85	Steering Wheel Position Sensor: Signal Above Allowable Range	Sets when the ABS module detects the absolute value of the calculated steering wheel angle is greater than a predetermined threshold.
C0051:86	Steering Wheel Position Sensor: Signal Invalid	Sets when the PSCM sends the defective status message due to an internal failure.