Pinpoint Test La: Steering Wheel Sensor Position Faults
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 HS-CAN2. A failure of the HS-CAN2, the PSCM or the internal sensors causes the ABS module to set one or more Diagnostic Trouble Codes (DTCs) and the ABS warning indicator is illuminated.
REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| ABS C0051:64 | Steering Wheel Position Sensor: Signal Plausibility Failure | This DTC sets when the ABS module determines the steering angle message is implausible when compared to the steering angle module value (based on the yaw rate sensor information). This DTC also sets if the long term offset compensation monitoring is completed after more than 30 km (18 miles) of straight driving resulting in a long term filtered steering angle offset greater than 15 degrees. |
| ABS 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). |
| ABS C0051:85 | Steering Wheel Position Sensor: Signal Above Allowable Range | Sets when the total steering wheel angle is above 1, 440 degrees. |
| ABS C0051:86 | Steering Wheel Position Sensor: Signal Invalid | Sets when the steering angle sensor information from the PSCM is "invalid", "unknown" or "faulty" instead of the actual sensor information. |
Possible Sources
- Incorrectly mounted RCM
- Network communication concern
- Incomplete or incorrect stability control sensor calibration
- Mismatched wheels and tires
- Loose or worn suspension components
- Loose or worn steering components
- RCM
- PSCM
PINPOINT TESTS LA: STEERING WHEEL POSITION SENSOR SIGNAL FAULT