1. According to the vibrations of the suspension, the auto-leveling sensors installed in the front and rear of the car send a signal to the auto-leveling control unit (main).
2. When a difference is detected between the two signals of the auto leveling sensors, the auto leveling control unit (main) checks the height of the car, and then calculates the amount of adjustment of the optical axis and sends a signal to the automatic leveling control unit (additional).
3. The auto leveling control unit compares the actual and set position of the reflector and then outputs a control signal to the headlight leveling actuator.