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.�