Wheel Speed Sensor: Description and Operation

The anti-lock brake system uses four anti-lock brake sensors to determine the vehicle speed. The anti-lock brake sensors operates on the magnetic induction principle. As the teeth on the anti-lock brake sensor indicator rotate past the stationary anti-lock brake sensor, a signal proportional to vehicle speed is generated and sent to the anti-lock brake control module.

The front anti-lock brake sensors are non-adjustable. The front anti-lock brake sensors and the front anti-lock brake sensor indicators are replaced separately.

The front anti-lock brake sensors are attached to the front wheel spindles and the front anti-lock brake sensor indicators are pressed onto the wheel hubs.

The rear anti-lock brake sensors are attached to the rear axle housings and the rear anti-lock brake sensor indicators are pressed onto the inner CV joints. Both are replaced separately.