Wheel Speed Sensors
The wheel speed sensor provides information about how fast the wheels are rotating to the ASR or ABS systems. The antilock brake system needs input about the wheel speed in order to function properly. The acceleration slip regulation also needs feedback from the wheel rotational speed. Both systems use this information to instigate proper power to their systems to be effective in speeding up or slowing down the wheels. The wheel speed sensor can also be a component of the ABS that picks up signals from the toothed rotor. These signals are sent to the control unit for the antilock brake system and are used for getting the proper amount of power to the brakes so that it can stop the wheels. Wheel speed sensors are located are usually housed in the wheel area itself and are easily accessible for repair and replacement. Amateurs can attempt replace of the sensors with a service manual.