Manufacturer Code Charts: 27

VSA DTC Troubleshooting: 27

DTC 27:

Steering Angle Sensor Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Reading and Clearing Diagnostic Trouble Codes.

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

2. Clear the DTC with the HDS.

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

4. Test-drive the vehicle around a number of corners.

NOTE: Drive the vehicle on the road, not on a lift.

5. Check for DTCs with the HDS.

Is DTC 27 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.�

6. Check the size, air pressure, and the amount of wear of all four tires Service and Repair.

Is the tire condition OK?

YES -

Go to step 7.

NO -

Replace the tires and/or adjust the air pressure, then recheck by test-driving.�

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

8. Disconnect the steering angle sensor 5P connector Service and Repair.

9. Disconnect the VSA modulator-control unit 47P connector.

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

11. Measure the voltage between body ground and VSA modulator-control unit 47P connector terminals No. 5 and No. 40 individually.





Is there 0.1 V or more?

YES -

Repair a short to power in the wire between the VSA modulator-control unit and the steering angle sensor.�

NO -

Go to step 12.

12. Measure the voltage between body ground and VSA modulator-control unit 47P connector terminals No. 30, No. 38, and No. 41 individually.





Is there 0.1 V or more?

YES -

Repair a short to power in the wire between the VSA modulator-control unit and the steering angle sensor.�

NO -

Go to step 13.

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

14. Check for continuity between body ground and VSA modulator-control unit 47P connector terminals No. 5 and No. 40 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire between the VSA modulator-control unit and the steering angle sensor.�

NO -

Go to step 15.

15. Check for continuity between body ground and VSA modulator-control unit 47P connector terminals No. 30, No. 38, and No. 41 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire between the VSA modulator-control unit and the steering angle sensor.�

NO -

Go to step 16.

16. Check for continuity between VSA modulator-control unit 47P connector terminal and steering angle sensor 5P connector terminal individually (see table).









Is there continuity?

YES -

Go to step 17.

NO -

Repair an open in the wire between the VSA modulator-control unit and the steering angle sensor.�

17. Check for continuity between VSA modulator-control unit 47P connector terminal and steering angle sensor 5P connector terminal individually (see table).









Is there continuity?

YES -

Go to step 18.

NO -

Repair an open in the wire between the VSA modulator-control unit and the steering angle sensor.�

18. Check the wheel alignment Service and Repair.

Is the wheel alignment OK?

YES -

Go to step 19.

NO -

Make sure the suspension is not modified, and the steering rack is centered. Then correct the wheel alignment, and recheck by test-driving.�

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

NOTE: Make sure the steering angle sensor and combination switch are mounted properly.

20. Reconnect all connectors.

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

22. Clear the DTC with the HDS.

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

24. Test-drive the vehicle around a number of corners.

NOTE: Drive the vehicle on the road, not on a lift.

25. Check for DTCs with the HDS.

Is DTC 27 indicated?

YES -

Go to step 26.

NO -

Check for loose terminals in the steering angle sensor 5P connector. If the connections are OK, replace the steering angle sensor Service and Repair.�

26. 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.

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

28. Test-drive the vehicle around a number of corners.

NOTE: Drive the vehicle on the road, not on a lift.

29. Check for DTCs with the HDS.

Is DTC 27 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 47P 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.�