System Description [11/2018 - ]

AUTOMATIC HIGH BEAM SYSTEM

General
The automatic high beam system enhances the illumination of the area in front of the vehicle to improve visibility for the driver. It works by detecting light from the front of the vehicle, using the lane departure warning camera, and turns the high beams of the headlights on or off automatically.

Function of Main Components

Component	Outline
Forward Recognition Camera	Determines when to turn the high beams on and off after identifying the lights of oncoming vehicles, preceding vehicles and other lights from the picture information of its camera sensor. Then, it sends high beam request signals to the main body ECU (multiplex network body ECU) via CAN communication.
Airbag Sensor Assembly	Outputs the yaw rate information to the main body ECU (multiplex network body ECU).
Combination Meter Assembly	Illuminates the automatic high beam indicator to inform the driver when the automatic high beam system is activated. Illuminates the high beam indicator light to inform the driver when the high beams are on. Displays a warning message when a malfunction is detected in the automatic high beam system.
Main Body ECU (Multiplex Network Body ECU)	Determines whether the automatic high beam system is in standby mode based on a headlight dimmer switch assembly (light control switch) high position signal, light control switch AUTO or head position signal and auto high beam switch signal, and sends an indicator illumination request signal and message display request signal to the combination meter assembly. Receives the high beam illumination request signal from the forward recognition camera and changes between the high beams and low beams. Performs illumination control for the automatic high beam system and stores Diagnostic Trouble Codes (DTCs) when the system malfunctions.
Auto High Beam Switch	Enables or disables the automatic high beam system.
Brake Booster with Master Cylinder Assembly	Outputs the information about the speed of the wheels. This information is used by the forward recognition camera to turn the high beams on and off.
Headlight dimmer switch assembly (light control switch)	Sends the light control switch signals to the main body ECU (multiplex network body ECU).
Millimeter Wave Radar Sensor Assembly	Radiates millimeter radar waves forward, uses the reflected waves to detect the presence of a vehicle traveling ahead, the vehicle-to-vehicle distance, and the relative speed, and then sends this information to the forward recognition camera.