DTC 41-21, 42-21, 43-21, 44-21: Right-Front Wheel Lock; Left-Front Wheel Lock; Right-Rear Wheel Lock; 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 switch.
• Contaminated brake fluid.

1. Drive the vehicle until the brakes drag or until 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 the vehicle on a lift, and spin the appropriate wheel by hand.
   WHEEL REFERENCE TABLE
   
   

   DTC	Appropriate Wheel
   41-21	Right-front
   42-21	Left-front
   43-21	Right-rear
   44-21	Left-rear

   Is there brake drag? 

   YES  - Repair the brake drag (see SYMPTOM TROUBLESHOOTING ).

   NO  - Go to step  3.

3. Check that the appropriate wheel speed sensor is properly mounted (see WHEEL SPEED SENSOR REPLACEMENT  ).

   Is the wheel speed sensor installation OK? 

   YES  - Go to step  4.

   NO  - Reinstall the wheel speed sensor, and check the mounting position (see WHEEL SPEED SENSOR REPLACEMENT  ).

4. Turn the ignition switch to ON (II).
5. Clear the DTC with the HDS.
6. Turn the ignition switch to LOCK (0).
7. 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.
8. Check for DTCs with the HDS.

   Is DTC 41-21, 42-21, 43-21, or 44-21 indicated? 

   YES  - Check for loose terminals in the ABS modulator-control unit 25P connector. If the symptom/indication is still present, replace the ABS modulator-control unit (see ABS MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION  ).

   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 (see INTERMITTENT FAILURES  ).