Axle Sensor - Description

DESCRIPTION





Two axle sensors (also known as headlamp levelling sensors) (1) are used on vehicles manufactured for certain export markets and for those domestic or export vehicles that are equipped with the optional High Intensity Discharge (HID) headlamps. One sensor is used to monitor the front suspension and another to monitor the rear suspension of the vehicle. The front and rear sensors are identical, but are secured by screws to unique fixed brackets that are mounted to a frame member above the left front suspension lower control arm or above the left rear suspension rear axle lower control arm. The sensor has a mechanical lever arm (3) that rotates a sensor input shaft. The opposite end of the lever arm is secured by a ball stud (4) to a unique linkage that is articulated by the changing positions of the left front or left rear suspension members in relationship to the body of the vehicle.

The axle sensor housing has an integral connector receptacle (2) and integral mounting hole. A cavity in the center of the molded plastic axle sensor housing contains the electronic circuitry of the sensor. The sensor housing is sealed to enclose and protect the internal electronic circuitry and components. The axle sensors are each connected to the vehicle electrical system through a dedicated take out and connector of the vehicle underbody wire harnesses.

The axle sensor, the unique mounting brackets and the linkage are serviced only as a complete unit. The sensors cannot be repaired or adjusted and, if damaged or ineffective, they must be replaced. The linkage ball stud mounted on the rear axle left lower control arm is available for separate service replacement.