Wheel Speed Sensors (WSS)

A wheel speed sensor is used at each wheel. The front and rear sensors are mounted to the knuckle at each wheel and the tone wheels are integral to the hub and bearings. The gear type tone wheel serves as the trigger mechanism for each sensor. The sensors convert wheel speed into small digital current signals in amperage. The BSCM sends 12 volts to the sensors. The sensor is typically comprised of either a hall effect or a magneto-resistive element integrated with signal conditioning circuit. The sensor produces signals alternating between two constant levels with frequency proportional to the associated wheel speed. The sensor reads either a toothed ferrous tone wheel or a magnetically charged encoder for signal generation. The signal is sent to the BSCM.

The wheel speed sensors provide the following:

CAN Outputs 

• Wheel rpm for each wheel