81-17

VSA DTC Troubleshooting: 81-15, 81-16, 81-17, 81-18

DTC 81-15:

Right-Front Wheel Speed Sensor Short to Power

DTC 81-16:

Left-Front Wheel Speed Sensor Short to Power

DTC 81-17:

Right-Rear Wheel Speed Sensor Short to Power

DTC 81-18:

Left-Rear Wheel Speed Sensor Short to Power

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.

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

5. Check for DTCs with the HDS.

Is DTC 81-15, 81-16, 81-17, or 81-18 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Check for loose terminals at the VSA modulator-control unit 36P connector. Refer to intermittent failures troubleshooting.�

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

7. Disconnect the VSA modulator-control unit 36P connector Service and Repair.

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

9. Measure the voltage between body ground and the appropriate VSA modulator-control unit 36P connector terminals (see table).









Is there 0.1 V or more?

YES -

Repair a short to power in the wire between the appropriate wheel speed sensor and the VSA modulator-control unit.�

NO -

Go to step 10.

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

11. Reconnect the VSA modulator-control unit 36P connector.

12. Substitute a known-good wheel speed sensor Service and Repair.





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

14. Clear the DTC with the HDS.

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

16. Test-drive the vehicle.

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

17. Check for DTCs with the HDS.

Is DTC 81-15, 81-16, 81-17, or 81-18 indicated?

YES -

Replace the original wheel speed sensor Service and Repair.�

NO -

Go to step 18.

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

19. 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.

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

21. Test-drive the vehicle.

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

22. Check for DTCs with the HDS.

Is DTC 81-15, 81-16, 81-17, or 81-18 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.�