Wheel Speed Mismatch

SYMPTOM
WHEEL SPEED MISMATCH

WHEN MONITORED
Ignition on.

SET CONDITION
When rotational wheel speed differing from the average wheel speed for the vehicle by more than 13 %. Average wheel speeds less than 40 mph and greater than 10 mph (no more than 1/2 mph difference in the front wheel speeds). Average wheel speeds less than 40 mph and greater than 25 mph (front wheel speed variance greater than 1/2 mph). No wheel slippage detected, not in Antilock mode, system not disabled, and no open sensor code.

POSSIBLE CAUSES
- Wheel speed mismatch DTC condition present
- Incorrect tone wheel
- CAB internal fault