Pinpoint Test Lb: Steering Wheel Position Sensor Faults: Notes
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation and Fault Conditions
The steering wheel rotation sensor sends steering wheel rotation speed, angle and direction of rotation to the SCCM. The SCCM sends this information to the ABS module over the HS-CAN2. A failure of the HS-CAN2, the SCCM or the internal sensor causes the ABS module to set one or more Diagnostic Trouble Codes (DTCs).
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 SASM indicates the steering center position cannot be found or has been lost. |
| ABS C0051:85 | Steering Wheel Position Sensor: Signal Above Allowable Range | Sets when the total steering wheel angle is above 1, 440 degrees. |
| ABS C0051:96 | Steering Wheel Position Sensor: Component Internal Failure | Sets when the steering angle sensor information from the SASM 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 steering components
- Loose or worn suspension components
- Steering wheel rotation sensor
- Incorrectly installed SASM
- Incorrectly installed clockspring
- SASM