Normal Operation and Fault Conditions

The SASM monitors steering wheel rotation speed, angle and direction of rotation and sends the information to the ABS module over the HS-CAN. A failure of the HS-CAN, SASM or the internal sensors causes the ABS module to set one or more DTCs.

PPT L ABS MODULE DTC FAULT TRIGGER CONDITIONS

DTC	Description	Fault Trigger Conditions
C0051:27	Steering Wheel Position Sensor: Signal Rate of Change Above Threshold	Sets when the ABS module detects the change in steering angle velocity between 2 test periods is greater than 40 degrees.
C0051:29	Steering Wheel Position Sensor: Signal Invalid	Sets when the ABS module detects the steering angle signal message does not match other ABS module inputs. This is most likely due to the steering angle sensor not being calibrated.
C0051:64	Steering Wheel Position Sensor: Signal Plausibility Failure	Sets when the ABS module detects the steering angle signal message does not match the yaw rate sensor messages sent from the RCM or the yaw rate measurement determined by wheel speed sensor differences.
C0051:82	Steering Wheel Position Sensor: Alive/Sequence Counter Incorrect/Not Updated	Sets when the ABS module detects too many or too few steering angle sensor messages.
U0428:68	Invalid Data Received from Steering Angle Sensor Module: Event Information	Sets when the ABS module detects the steering angle sensor message is "invalid" instead of the actual steering angle sensor information.