VSA

VSA DTC Troubleshooting: 41-21, 42-21, 43-21, 44-21

DTC 41-21: Right-front Wheel Lock

DTC 42-21: Left-front Wheel Lock

DTC 43-21: Right-rear Wheel Lock

DTC 44-21: 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.

1. Raise the vehicle, and support it with safety stands in the proper locations. Service and Repair

2. Turn the appropriate wheel by hand.





Is there brake drag?
YES - Repair the brake drag.

NO - Go to step 3.


3. Check that the appropriate wheel speed sensor is properly mounted. VSA System Wheel Speed Sensor Replacement (With VSA)

Is the wheel speed sensor installation OK?
YES - Go to step 4.

NO - Reinstall the wheel speed sensor, and check the mounting position. VSA System Wheel Speed Sensor Replacement (With VSA)


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

5. Clear the DTC with the HDS.

6. Test-drive the vehicle at 7 mph (10 km/h) for 20 seconds or more.
NOTE: Drive the vehicle on a straight section of road, not on a lift.

7. Check for DTCs with the HDS.

Is DTC 41-21, 42-21, 43-21, and/or 44-21 indicated?
YES - Check for loose terminals in the VSA modulator-control unit 37P connector. If necessary, substitute a known-good VSA modulator-control unit, Service and Repair and retest.

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.