108-21

VSA DTC Troubleshooting: 108-21

DTC 108-21: Steering Angle Sensor Malfunction

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Test-drive the vehicle.
NOTE: Drive the vehicle on a straight section of road, not on a lift.

4. Check for DTCs with the HDS.

Is DTC 108-21 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time.


5. Turn the ignition switch to LOCK (0).

6. Substitute a known-good steering angle sensor. Service and Repair

7. Turn the ignition switch to ON (II).

8. Clear the DTC with the HDS.

9. Test-drive the vehicle.
NOTE: Drive the vehicle on a straight section of road, not on a lift.

10. Check for DTCs with the HDS.

Is DTC 108-21 indicated?
YES - Go to step 11.

NO - Replace the original steering angle sensor. Service and Repair


11. Update the VSA modulator-control unit if it does not have the latest software. Testing and Inspection If the unit already has the latest software, substitute a known-good VSA modulator-control unit. Service and Repair

12. Test-drive the vehicle.
NOTE: Drive the vehicle on a straight section of road, not on a lift.

13. Check for DTCs with the HDS.

Is DTC 108-21 indicated?
YES - Check for loose terminals in the VSA modulator-control unit 36P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit, Service and Repair then retest. If the VSA modulator-control unit was substituted, go to step 1.

NO - If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit. Service and Repair If any other DTCs are indicated, go to the indicated DTCs troubleshooting.