VSA System

VSA DTC Troubleshooting: 21, 22, 23, 24

DTC 21, 22, 23, 24:

Magnetic Encoder Malfunction

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

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

2. Clear the DTC with the HDS.

3. Test-drive the vehicle at 31 mph (50 km/h) or more.

4. Check for DTCs with the HDS.

Is DTC 21, 22, 23, or 24 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose terminals between the appropriate wheel speed sensor 2P connector and the VSA modulator-control unit 46P connector. Refer to intermittent failures troubleshooting.�

5. Inspect the appropriate magnetic encoder for debris or cracks.





Is the magnetic encoder surface OK?

YES -

Go to step 6.

NO -

Remove the debris from the magnetic encoder, or replace the front hub bearing unit or the rear hub bearing unit (magnetic encoder):

- Front: Replace the front hub bearing unit.�
- Rear: Replace the rear hub bearing unit.�

6. 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.

7. Test-drive the vehicle at 31 mph (50 km/h) or more.

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

8. Check for DTCs with the HDS.

Is DTC 21, 22, 23, or 24 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 46P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit Testing and Inspection. If a known-good VSA modulator-control unit was substituted, replace the appropriate hub bearing unit if it has not been replaced.

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

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 Testing and Inspection. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.�