AUTOMATIC HIGH BEAM SYSTEM SYSTEM DESCRIPTION


  1. AUTOMATIC HIGH BEAM SYSTEM


    1. 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 inner rear view mirror assembly, and turns the high beams of the headlights on or off automatically.

    2. Function of Main Components

      Component Outline
      Inner Rear View Mirror Assembly 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 ECU Assembly Outputs yaw rate information to the main body ECU (multiplex network body ECU).
      Brake Actuator Assembly (Skid Control ECU) Outputs information about the speed of the wheels. This information is used by the inner rear view mirror assembly to turn the high beams on and off.
      Combination Meter Assembly

      Turns on the automatic high beam indicator light and displays a message on the multi-information display based on an indicator illumination request signal from the main body ECU (multiplex network body ECU).

      Tech Tips


      • When an automatic high beam system malfunction is detected, the automatic high beam indicator light turns off and "Headlight System Malfunction Visit Your Dealer" is displayed on the multi-information display.

      • The automatic high beam indicator light illuminates to inform the driver when the automatic high beam system is active.
      Main Body ECU (Multiplex Network Body ECU)

      • Determines whether the automatic high beam system is in standby mode based on a dimmer 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 inner rear view mirror assembly 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.
      ECM Outputs a signal to indicate that the shift lever is in R. Based on this signal, the inner rear view mirror assembly turns the high beams off.
      Auto High Beam Switch Enables or disables the automatic high beam system.