C1231-DRIVE TEST: STEERING ANGLE SENSOR
For a complete wiring diagram Refer to Section 8W.
Possible Causes
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STEERING ANGLE SENSOR INSTALLATION
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STEERING ANGLE SENSOR
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ANTI-LOCK BRAKES MODULE
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Diagnostic Test
1.
CHECK FOR A DTC C1231–DRIVE TEST: STEERING ANGLE SENSOR
NOTE:
This DTC must be active for the results of this test to be valid.
NOTE:
If any of the following DTCs are present they must be repaired before continuing.
DTC C1219-STEERING ANGLE SENSOR ERRATIC PERFORMANCE
DTC C123F-STEERING ANGLE SENSOR COMPARATIVE PERFORMANCE
DTC C1240-STEERING ANGLE SENSOR ANGLE OVERTRAVEL PERFORMANCE
Turn the ignition on.
With the scan tool, read and record DTCs.
With the scan tool, read and record Freeze Frame information.
Perform ECU initialization with drive test. Refer to Perform ABS VERIFICATION TEST.
(Refer to 5 - BRAKES - STANDARD PROCEDURE).
Start the engine.
With the scan tool, read and record DTCs.
Does the scan tool display: C1231–DRIVE TEST: STEERING ANGLE SENSOR?
Yes
No
2.
VERIFY THAT THE STEERING ANGLE SENSOR IS ACTIVE ON THE BUS
With the scan tool, select Steering Control Module.
Verify that the Steering Angle Sensor is active on the bus.
Is the Steering Angle Sensor active on the bus?
Yes
No
3.
CHECK STEERING ANGLE
Turn steering wheel so wheels point in a straight ahead position.
With scan tool check steering angle.
Is the Steering Angle reading within +/-15 degrees?
Yes
No
4.
CHECK STEERING ANGLE CHANGE
Turn steering wheel so wheels point in a straight ahead position.
With scan tool check steering angle.
Slowly rotate steering wheel while looking for a smooth change. The degrees will decrease to the right and increase when rotating steering wheel to the left.
Did the steering angle change accordingly?
Yes
No
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Replace the Steering Angle Sensor in accordance with the Service Information and clear offsets by initializing ECU with wheels pointing straight ahead.
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Perform ABS VERIFICATION TEST.
(Refer to 5 - BRAKES - STANDARD PROCEDURE).
5.
CHECK STEERING ANGLE SENSOR INSTALLATION
WARNING:
To avoid personal injury or death, on vehicles equipped with airbags, disable the supplemental restraint system before attempting any steering wheel, steering column, airbag,
occupant classification system, 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 supplemental restraint system. Failure to take the proper precautions could
result in accidental airbag deployment.
NOTE:
Proper Steering Angle Sensor installation is crucial for proper operation.
Turn the ignition off.
Verify that the Steering Angle Sensor is properly installed. Refer to 8 - ELECTRICAL/RESTRAINTS/CLOCKSPRING - INSTALLATION.
Is the Steering Angle Sensor properly installed?
Yes
No