Wheel Speed Sensor: Description and Operation

One wheel speed sensor (WSS) is located at each wheel and sends a AC signal to the CAB. The voltage is generated by magnetic induction when a tooth sensor ring passes by a stationary magnetic sensor. The CAB then converts the AC signal into digital signals for each wheel. The four wheel speed sensors are serviced individually. The front tone wheels are serviced as an assembly with the outer C.V joint housing. The rear tone-wheels are serviced as an assembly with the rotor hub.