DTC 42-21
DTC 41-21: Right-front Wheel LockDTC 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 switch.
^ Contaminated brake fluid.
1. Raise the vehicle, and support it with safety stands in the proper locations.
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.
Is the wheel speed sensor installation OK?
YES - Go to step 4.
NO - Reinstall the wheel speed sensor, and check the mounting position.
4. Turn the ignition switch to ON (II).
5. Clear the DTC with the HDS.
6. Test-drive the vehicle. 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 - Go to step 8.
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.
8. Update the VSA modulator-control unit if it does not have the latest software. If the unit already has the latest software, substitute a known-good VSA modulator-control unit.
9. Test-drive the vehicle. 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.
10. 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 36P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit, 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. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.