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 CausesSTEERING ANGLE SENSOR INSTALLATIONSTEERING ANGLE SENSORANTI-LOCK BRAKES MODULE1. CHECK FOR A DTC C1231–DRIVE TEST: STEERING ANGLE SENSORThis DTC must be active for the results of this test to be valid.If any of the following DTCs are present they must be repaired before continuing.DTC C1219-STEERING ANGLE SENSOR ERRATIC PERFORMANCEDTC C123F-STEERING ANGLE SENSOR COMPARATIVE PERFORMANCEDTC C1240-STEERING ANGLE SENSOR ANGLE OVERTRAVEL PERFORMANCETurn 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?YesGo To 2 NoRefer 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 BUSWith 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?YesGo To 3No(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for No Response related diagnostic procedures.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?YesGo To 4NoGo To 54. CHECK STEERING ANGLE CHANGETurn 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?YesReplace the Anti-Lock Brake Module in accordance with the Service Information.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoReplace 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 INSTALLATIONTo 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.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?YesReplace the Anti-Lock Brake Module in accordance with the Service Information.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoRepair as necessary and clear offsets by initializing ECU with wheels pointing straight ahead. Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).