Wheel Speed Sensor: Description and Operation

The anti-lock brake system operates as follows:
^ It uses four variable reluctance brake anti-lock sensors and brake anti-lock sensor indicators to determine the rotational speed of each wheel.
^ Sensors operate on magnetic induction principle.
^ As the teeth on the brake anti-lock sensor indicators rotate past the brake anti-lock sensors, a signal proportional to the speed of the rotation is generated and sent to the anti-lock brake control module through a twisted pair harness.





Front
The anti-lock brake control module front brake anti-lock sensors are bolted to the front wheel knuckles. The front brake anti-lock sensor indicators are pressed onto the outer CV joints.








Rear
On sedans, the rear brake anti-lock sensors are attached to the right hand rear disc brake adapter / left hand rear disc brake adapters.

On station wagons, the rear brake anti-lock sensors attach to the rear wheel spindle.

On all models, the rear brake anti-lock sensor indicators are pressed onto the wheel hub assemblies.

Component Location
The components of the anti-lock brake can be located in the Component Location illustration.