Manufacturer Code Charts: 88

VSA DTC Troubleshooting: 88

DTC 88:

Difference in Wheel Speed

NOTE:

- A wheel bearing that is installed backwards can cause this DTC.
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

1. Check all four tires for size, inflation, and wear.

Are all four tires the correct size, properly inflated, and worn evenly?

YES -

Go to step 2.

NO -

Install the correct tires, a known-good set of tires, or set the tires to the correct pressure, and retest by test-driving.�

2. Test-drive the vehicle.

3. Check the RIGHT-FRONT, LEFT-FRONT, RIGHT-REAR, LEFT-REAR WHEEL SPEED in the VSA DATA LIST with the HDS.

Are all four the same indicated value?

YES -

Go to step 4.

NO -

Reinstall or replace the wheel speed sensor(s) Service and Repair, and retest by test-driving.�

4. Check all magnetic encoders on the hub bearing units for debris or cracks: Front Service and Repair, rear Service and Repair.

Are they installed correctly and in good condition?

YES -

Go to step 5.

NO -

Clean and reinstall or replace the hub bearing unit(s), and retest by test-driving:

- Front: Reinstall or replace the front hub bearing unit Service and Repair.�
- Rear: Reinstall or replace the rear hub bearing unit Service and Repair.�

5. Update the VSA modulator-control unit if it does not have the latest software Testing and Inspection. If the unit already has the latest software, substitute a known-good VSA modulator-control unit Service and Repair.

6. Test-drive the vehicle at 10 mph (15 km/h) 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 88 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 46P connector. Check for a loose connection at G303. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit Service and Repair, 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 Service and Repair. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.�