C1231-DRIVE TEST: STEERING ANGLE SENSOR

For a complete wiring diagram Refer to Section 8W.

When Monitored:
During the Drive Test.
Set Condition:
If the Anti-Lock Brakes Module detects implausible Steering Angle Sensor data.

Possible Causes

STEERING ANGLE SENSOR INSTALLATION

STEERING ANGLE SENSOR

ANTI-LOCK BRAKES MODULE

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.

(Refer to 5 - BRAKES - STANDARD PROCEDURE)

Does the scan tool display: C1231–DRIVE TEST: STEERING ANGLE SENSOR?

Yes

Go To 2

Refer to the INTERMITTENT CONDITION diagnostic procedure.
Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to 5 - BRAKES - DIAGNOSIS AND TESTING)

2.VERIFY THAT THE STEERING ANGLE SENSOR IS ACTIVE ON THE BUS

Is the Steering Angle Sensor active on the bus?

Yes

Go To 3

(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for No Response related diagnostic procedures.

3.CHECK STEERING ANGLE

Is the Steering Angle reading within ±15 degrees?

Yes

Go To 4

Go To 5

4.CHECK STEERING ANGLE CHANGE

Did the steering angle change accordingly?

Yes

Replace the Anti-Lock Brake Module in accordance with the Service Information.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).

Replace the Steering Angle Sensor in accordance with the Service Information and clear offsets by initializing ECU with wheels pointing straight ahead.
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.

Is the Steering Angle Sensor properly installed?

Yes

Replace the Anti-Lock Brake Module in accordance with the Service Information.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).

Repair as necessary and clear offsets by initializing ECU with wheels pointing straight ahead.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).