VSA System

Control System DTCs

VSA DTC Troubleshooting: 41-11, 42-11, 43-11, 44-11

DTC 41-11 : Right-Front Wheel Lock
DTC 42-11 : Left-Front Wheel Lock
DTC 43-11 : Right-Rear Wheel Lock
DTC 44-11 : Left-Rear Wheel Lock

The DTCs may be indicated under these conditions:
* The vehicle goes into a spin.
* The ABS or VSA continues to operate for a long time.
* Snow, dirt, or debris build-up on the wheel speed sensor or magnetic encoder.
* Misadjusted brake pedal position switch.
* Contaminated brake fluid.

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. Brake drag check:

Brake drag check
-1. Drive the vehicle to see if the brakes drag or if the pedal is high and hard. This can take 20 or more brake pedal applications during an extended test-drive.

-2. With the engine running, raise and support the vehicle, then spin the appropriate wheel by hand.





Is there brake drag?
-YES- Repair the brake drag Symptom Related Diagnostic Procedures.
-NO- Go to step 2.

2. Wheel speed sensor installation check:

Wheel speed sensor installation check
-1. Check that the appropriate front wheel speed sensor Front Wheel Speed Sensor Removal and Installation or rear wheel speed sensor Rear Wheel Speed Sensor Removal and Installation is properly mounted.





Is the wheel speed sensor installation OK?
-YES- Go to step 3.
-NO- Reinstall the front wheel speed sensor Front Wheel Speed Sensor Removal and Installation or rear wheel speed sensor Rear Wheel Speed Sensor Removal and Installation, and recheck the mounting position.

3. Problem verification:

Problem verification
-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 at 6 mph (10 km/h) for 20 seconds or more.
NOTE: Drive the vehicle on the road, not on a lift.

-5. Check for DTCs with the HDS.

Is DTC 41-11, 42-11, 43-11, or 44-11 indicated?
-YES- The failure is duplicated. Go to step 4.
-NO- If any other DTCs are indicated, go to the indicated DTCs troubleshooting. If DTCs are not indicated, intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.

4. VSA modulator-control unit check (update):

VSA modulator-control unit check (update)
-1. Update the VSA modulator-control unit if it does not have the latest software Programming and Relearning.

-2. Turn the ignition switch to LOCK (0).

-3. Test-drive the vehicle at 6 mph (10 km/h) for 20 seconds or more.
NOTE: Drive the vehicle on the road, not on a lift.

-4. Check for DTCs with the HDS.

Is DTC 41-11, 42-11, 43-11, or 44-11 indicated?
-YES- Check for loose terminals in the VSA modulator-control unit 22P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit Service and Repair.
-NO- Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.