Wheel Speed Sensor: Testing and Inspection
Wheel Sensor Inspection1. Clean the encoder, and make sure no metal or other debris is stuck to the encoder surface.
2. Check the magnetic encoder (A) and pulser (B) for damage. If cracked or damaged, replace the encoder or pulser.
3. Measure the air gap between the wheel sensor (C) and the magnetic encoder or pulser all the way around while rotating the encoder.
Standard:
Front: 0.5 - 1.2 mm (0.02 - 0.05 inch)
Rear: 0.4 - 1.1 mm (0.02 - 0.04 inch)