HEADLIGHT AUTO LEVELING SYSTEM OPERATION

Varying Passenger And Cargo Conditions Operation

1. According to the fluctuation of the suspension, the auto leveling sensors installed in the front and rear of the vehicle send a signal to the auto leveling control module (main).

2. When a difference between two of the signals inputted from the auto leveling sensors is detected, the auto leveling control module (main) verifies the vehicle attitude, then calculates the amount of optical axis adjustment and sends a signal to the auto leveling control module (sub).

3. The auto leveling control module compares the actual and the required position of the reflector, then inputs a command signal to the headlight leveling actuator.

Operation when driving

1. While driving with the headlights on, the auto leveling control module (main) receives an inputted vehicle speed signal from the ABS/TCS HU/CM and a signal based on suspension fluctuation from the front and rear auto leveling sensors.

2. Based on the inputted vehicle speed signal, the auto leveling control module calculates acceleration angle and verifies the change in vehicle speed. Also, if there is a difference between the two signals inputted from the front and rear auto leveling sensors, the auto leveling control module (main) unit verifies the actual attitude of the vehicle. The auto leveling control module (main) calculates the optical axis adjustment amount based on the condition of these two signals, and sends a signal to the auto leveling control module (sub).

3. The auto leveling control module compares the actual and the required position of the reflector, then inputs a command signal to the leveling actuator.

Note

• When the ignition switch is turned to the ON position, it is normal to hear the headlight leveling actuator operating for a few seconds, as it verifies system operating condition.

• When driving on a consistently rough or uneven road, the auto leveling function would cause a flickering effect for oncoming traffic. Therefore, to prevent the blinding of oncoming traffic, the auto leveling function is slowed down.