Description

DESCRIPTION

The antilock brake system uses two-wire wheel speed sensors, known as active wheel speed sensors. The sensors use an electronic principle known as magnetoresistance to help increase performance and durability. The sensors convert wheel speed into a small digital signal. A wheel speed sensor (WSS) is used at each wheel. The gear (tooth) type tone wheel serves as the trigger mechanism for each sensor. At each wheel of the vehicle there is one wheel speed sensor and one tone wheel.





A rear wheel speed sensor (2) is mounted through each rear disc brake adapter or drum brake support plate. A tone wheel is mounted to and rotates with each rear hub and bearing assembly.

The WSS air gaps are not adjustable. For the WSS air gap specification, [1][2]Antilock Brakes / Traction Control Systems. Each WSS is serviced individually. The tone wheels are serviced as part of the rear hub and bearing.