Front Wheel Speed Sensor
System uses 2-wire wheel speed sensors, known as active wheel speed sensors. The sensors use an electronic principle known as magnetoresistive to help increase performance and durability. The sensors convert wheel speed into a small digital signal. A wheel speed sensor is used at each wheel. The gear (tooth) type tone wheel serves as trigger mechanism for each sensor. At each wheel of vehicle there is one wheel speed sensor and one tone wheel.
The front wheel speed sensor (WSS) is attached to inside of steering knuckle. See Fig 1 . The front tone wheel is mounted through knuckle to rear of hub and bearing assembly. WSS air gaps are not adjustable. See WHEEL SPEED SENSOR AIR GAP . Each front WSS is serviced individually as is each front tone wheel.