C1240-STEERING ANGLE SENSOR OVERTRAVEL PERFORMANCE
C1240-STEERING ANGLE SENSOR OVERTRAVEL PERFORMANCE
For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
With ignition on, but not if a CAN time out failure is detected.
Or, if a fault is detected by the Steering Angle Sensor.
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Set Condition:
If the Anti-Lock Brakes Module detects that the absolute value of the measured steering wheel angle is greater than 720 degrees.
Possible Causes |
|---|
| VEHICLE DAMAGE |
| STEERING COLUMN / INTERMEDIATE SHAFT DAMAGE |
| STEERING WHEEL ALIGNMENT |
| STEERING ANGLE SENSOR LOOSE |
| CLOCKSPRING (SAS) IMPROPERLY INSTALLED (WRONG MOUNTING POSITION) |
| CLOCKSPRING (SAS) |
1. PERFORM TEST DRIVE AND VERIFY DTC IS STILL ACTIVE
| 1. | Turn the ignition on. |
| 2. | With the scan tool, erase ABS DTCs. |
| 3. | Cycle the ignition switch. |
| 4. | Turn steering wheel from lock to lock. |
| 5. | With the scan tool, read ABS DTCs. |
Does this DTC reset?
Yes
- Go To 2
No
- Perform the ABS-INTERMITTENT CONDITION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
2. CHECK STEERING ANGLE SENSOR OUTPUT
| 1. | Start the engine. |
| 2. | Center the steering wheel. |
| 3. | With the scan tool, read the Steering Angle Sensor Position. |
Is the Steering Angle Sensor Position within ±15°?
Yes
- Go To 4
No
- Go To 3
3. INSPECT VEHICLE, STEERING COLUMN, AND INTERMEDIATE SHAFT FOR DAMAGE
| NOTE: | If possible, check vehicle repair history for collision damage. |
| 1. | Turn the ignition off. |
| 2. | Inspect the vehicle for damage causing tracking problems or steering wheel misalignment. |
| 3. | Inspect the steering column and intermediate shaft for damage. |
| 4. | Center the steering wheel. |
| 5. | With the scan tool, read the Steering Angle Sensor Position. |
Is the Steering Angle Sensor Position within ±15°?
Yes
- Repair as necessary.
- Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
No
- Go To 4
4. CHECK STEERING ANGLE CHANGE
| 1. | Turn steering wheel so wheels point in a straight ahead position. |
| 2. | With scan tool check steering angle if reading travels to 720 degrees while rotating wheel from lock to lock. |
| NOTE: | Sensor damage can occur if wheel is turned over 720 degrees. |
| 3. | Rotate steering wheel to the right and the degrees will decrease and rotate steering wheel to the left and the degrees will increase. |
Did the steering angle change accordingly and display less than 720 degrees from lock to lock?
Yes
- Go To 5
No
- Replace the Clockspring (SAS) in accordance with the Service Information and clear offsets by initializing ECU with wheels pointing straight ahead.
- Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
5. CHECK CLOCKSPRING (SAS) INSTALLATION
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.
WARNING:
| NOTE: | Proper Clockspring (SAS) installation is crucial for proper operation. |
| 1. | Verify that the Clockspring (SAS) is properly installed. |
Is the Clockspring (SAS) properly installed?
Yes
- Replace the Clockspring (SAS) and clear offsets by initializing ECU with wheels pointing straight ahead, in accordance with the Service Information.
- Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
No
- Repair as necessary and clear offsets by initializing ECU with wheels pointing straight ahead.
- Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).