C0051-62

C0051-62-STEERING WHEEL POSITION SENSOR - SIGNAL COMPARE FAILURE

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
When vehicle speed is above 15 km/h (9 mph) and the Yaw rate, lateral acceleration, steering angle and vehicle-speed are all valid.

- Set Condition:
When the Anti-lock Brake System (ABS) Module detects that the Electronic Stability Control (ESC) calculated Steering Angle does not match the sensor signal from the Steering Control Module (SCM).





NOTE: Repair any Steering Angle Sensor (SAS) DTCs first before continuing with this with this diagnostic procedure. Testing and Inspection .

Diagnostic Test

1. INSPECT THE WHEEL ALIGNMENT, STEERING COLUMN AND INTERMEDIATE SHAFT FOR INCORRECT INSTALLATION OR DAMAGE

NOTE: If available, check the vehicle repair history for collision damage.

1. Perform any Technical Service Bulletins (TSBs) that may apply
2. Inspect the vehicle for proper wheel alignment.
3. Inspect the vehicle for damage causing tracking problems or steering wheel misalignment.
4. Inspect the steering column and intermediate shaft for damage.

Were any problems found?

Yes

- Repair as necessary.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Go To 2

2. CHECK THE STEERING ANGLE
1. Turn steering wheel so wheels point in a straight ahead position.
2. With scan tool, graph the steering angle while slowly rotating steering wheel from lock to lock.

Is the Steering Angle reading within ±15°?

Yes

- Go To 3

No

- Replace the Clockspring (SAS). Clockspring - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

3. CHECK STEERING ANGLE CHANGE
1. Turn steering wheel so wheels point in a straight ahead position.
2. With scan tool, graph the steering angle to see while rotating wheel from lock to lock.

NOTE: Sensor damage can occur if wheel is turned over 720°.

3. Rotate steering wheel to the right and the degrees will decrease and rotating steering wheel to the left the degrees will increase.

Did the steering angle change accordingly and display lower then 720° from lock to lock with no erratic signal behavior?

Yes

- Replace the Anti-lock Brake System (ABS) Module. . Service and Repair
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Go To 4

4. CHECK THE CLOCKSPRING (SAS) INSTALLATION

WARNING: To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment.

NOTE: If available, check the vehicle repair history for collision damage.

NOTE: Proper Clockspring (SAS) installation is crucial for proper operation.

1. Turn the ignition off.
2. Verify that the Clockspring (SAS) is properly installed. Procedures.

Is the Clockspring (SAS) properly installed?

Yes

- Replace the Steering Control Module (SCM). Clockspring - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Repair as necessary.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.