ABS (Without VSA)

ABS 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 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. ABS Wheel Speed Sensor Replacement (Without VSA)

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

NO - Reinstall the wheel speed sensor, and check the mounting position. ABS Wheel Speed Sensor Replacement (Without 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 the road, not on a lift.

7. Check for DTCs with the HDS.

Is DTC 41-21, 42-21, 43-21, or 44-21 indicated?
YES - Check for loose terminals between the wheel speed sensor 2P connector and the ABS modulator-control unit 25P connector. If necessary, substitute a known-good ABS modulator-control unit: Except Si model, Service and Repair Si model, 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 the time.