Front Axle Sensor And Rear Axle Sensor: Preparations

Fig 1: Identifying Front And Rear Axle Sensors

Courtesy of VOLVO CARS OF NORTH AMERICA.

The sensors sense the angle of the vehicle at different loads and send the information to the "master" of the two Gas Discharge Lamp Modules (GDLs). The "master" Gas Discharge Lamp Module (GDL) then sends control signals to the motors that regulate the beam length.

Type 

Resistance sensor.

Characteristics 

The resistance between connections 1 and 4 changes linearly depending on the angle.

Other information 

One of the position sensors is located next to the rear axle and is connected to the left rear control arm via a link system. The other position sensor is located next to the right front axle and is connected to the right front control arm via a link system. The vehicle's angle is measured by the sensors being affected via the relevant link system.