VSA System

VSA DTC Troubleshooting: 12, 14, 16, 18

DTC 12, 14, 16, 18:

Wheel Speed Sensor Signal Malfunction

NOTE:

- If the ABS and other indicators come on because of electrical noise, the indicators will go off when you test-drive the vehicle speed at 10 mph (15 km/h) or more and the noise is gone.
- An incorrectly installed wheel bearing can cause one of these DTCs.
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

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

2. Check the appropriate wheel speed sensor and inspect the magnetic encoder on the appropriate hub bearing for debris: Front Service and Repair, rear Service and Repair.





Are they installed correctly in good condition, and free of debris?

YES -

Go to step 3.

NO -

Reinstall or replace the appropriate wheel speed sensor, hub bearing unit, and retest by test-driving.�

3. Substitute an appropriate known-good wheel speed sensor Service and Repair.

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

5. Clear the DTC with the HDS.

6. Test-drive the vehicle at 10 mph (15 km/h) or more.

7. Check for DTCs with the HDS.

Is DTC 12, 14, 16, or 18 indicated?

YES -

Go to step 8.

NO -

Replace the original wheel speed sensor Service and Repair.�

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

9. Substitute an appropriate known-good hub bearing unit: Front Service and Repair, Rear Service and Repair.

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

11. Clear the DTC with the HDS.

12. Test-drive the vehicle at 10 mph (15 km/h) or more.

13. Check for DTCs with the HDS.

Is DTC 12, 14, 16, or 18 indicated?

YES -

Go to step 14.

NO -

Replace the original hub bearing unit:

- Front: Replace the original front hub bearing unit Service and Repair.�
- Rear: Replace the original rear hub bearing unit Service and Repair.�

14. 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.

15. Test-drive the vehicle at 10 mph (15 km/h) or more.

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

16. Check for DTCs with the HDS.

Is DTC 12, 14, 16, or 18 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 46P connector. Check for a loose connection at G303. 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.�