Wheel Speed Sensor: Testing and Inspection

Wheel Sensor Inspection
1. Clean the encoder, and make sure no metal or other debris is stuck to the encoder surface.





2. Check the magnetic encoder (A) for damage. If cracked or damaged, replace the encoder.
3. Measure the air gap between the wheel sensor (B) and the magnetic encoder while rotating the encoder.
Standard:
Front: 0.25 - 1.52 mm (0.01 - 0.06 inch)
Rear: 0.51 - 1.27 mm (0.02 - 0.05 inch)