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 (see GENERAL TROUBLESHOOTING INFORMATION ).

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.
Test-drive the vehicle.
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) (see WHEEL SPEED SENSOR REPLACEMENT ), and retest by test-driving.
Check all magnetic encoders on the hub bearing units for debris or cracks: Front (see KNUCKLE/HUB BEARING UNIT REPLACEMENT ), rear (see KNUCKLE/HUB BEARING UNIT REPLACEMENT ).
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 (see KNUCKLE/HUB BEARING UNIT REPLACEMENT ).
- Rear: Reinstall or replace the rear hub bearing unit (see KNUCKLE/HUB BEARING UNIT REPLACEMENT ).
Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE ).
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.
Check for DTCs with the HDS.
Is DTC 88 indicated?

YES -Check for loose terminals in the VSA modulator-control unit 46P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).

NO -If the VSA modulator-control unit was updated, troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCS TROUBLESHOOTING .