Vehicle Stability Assist

DTC 21: Difference in Wheel Speed

NOTE: After setting the front toe always perform the steering angle sensor writing procedure.

1. Check all four tires.

Are all four tires the correct size and properly inflated?

YES - Go to step 2.

NO - install the correct tires or set the tires to the correct pressure, and retest by test-driving.

2. Check all wheel sensors.

Are wheel sensors installed correctly and in good condition?

YES - Go to step 3.

NO - Reinstall or replace the wheel sensor(s), and recheck by test-driving.

3. Check all magnetic encoders on the wheel bearings.

Are they installed correctly and in good condition?

YES - Go to step 4.

NO - Replace the wheel bearing(s), and recheck by test-driving.

4. Swap the wheels and tires with a known-good vehicle.
5. Clear the DTCs with the HDS.
6. Test-drive the vehicle at 10 mph (15 km/h) or more.
7. Check for DTCs with the HDS.

Does the VSA and ABS indicator come on, and is DTC 21 indicated?

YES - Check for loose terminals in the VSA control unit 46P connector. If the connections are good, replace the VSA modulator-control unit.

NO - install the original wheels and tires onto the vehicle and recheck. If the DTC 21 is indicated again, replace the problem tires.