LIGHTING


  1. Description


    1. An automatic high beam system is optional equipment.

    2. The automatic high beam system detects lights in front of the vehicle and automatically changes between high beams and low beams to support the driver during night driving.

  2. Precaution for Automatic High Beam System


    1. The automatic high beam system is a system that helps ensure visibility by automatically switching the high beams on and off.

    2. However, due to control limitations of the automatic high beam system, it may be necessary to manually switch high beams on and off. When driving, for safety reasons, make sure to switch the high beams and low beams manually in accordance with the driving conditions.

    3. Under the following conditions, the automatic high beam system might not detect other vehicles or lights correctly, or the high beams might cause glare or flash pedestrians or the occupants of other vehicles. Manual operation should be considered.

      Factor Condition
      Weather / Climate When driving in bad weather (rain, snow, fog, sandstorms, etc.).
      Windshield Glass

      • When the windshield glass is not clear (ice, snow or frost on the glass).

      • When the windshield glass is dirty (sand, mud, water stains or bugs on the glass).

      • When the windshield glass is cracked.

      • When the windshield glass is fogged-up.

      • When the windshield glass has a film attached.

      • When an object on the instrument panel reflects off of the windshield glass.

      • When any other abnormal conditions exist with the windshield glass.
      Automatic High Beam Sensor (Inner Rear View Mirror Assembly)

      • When any other abnormal conditions exist with the windshield glass.

      • When the inner rear view mirror assembly or its built-in camera is deformed.

      • When the automatic high beam sensor in the inner rear view mirror assembly is dirty.

      • When any other abnormal conditions exist with the inner rear view mirror assembly or its built-in automatic high beam sensor.
      Nearby Vehicles or Lights

      • When lights similar to headlights or taillights are in the vicinity of the vehicle.

      • When a nearby vehicle has no lights or its lights are off.

      • When a vehicle in front has misaligned lights, or its lights are changing color.

      • When a vehicle in front has extremely dirty headlights or taillights.
      Road Conditions

      • When driving in an area where the conditions often change between bright and dark.

      • When driving on a road with many uphill and downhill slopes.

      • When driving on a winding road or around a sharp curve.

      • When driving on a bumpy road (cobblestone pavement, gravel road, rough unpaved road, etc.).

      • When highly reflective objects are in front of the vehicle (mirrors, road signs, etc.).
      Vehicle Conditions

      • When the headlights are damaged, deformed or dirty.

      • When the vehicle posture is abnormal due to flat tire (or posture has changed due to the vehicle being fully loaded, a trailer being towed, road conditions etc.).

      • When the vehicle has other malfunctions or if the vehicle has been modified.
      Automatic High Beam System

      Malfunction:


      • When the automatic high beam indicator light on the combination meter is blinking.

      Others:


      • When the automatic high beam system does not seem to be changing between the high beams and low beams properly.

      • When the automatic high beam system is frequently changing between the high beams and low beams.

      • When the glare from the high beams would disturb pedestrians or the drivers of other vehicles.

  3. System Diagram

    A01W5WOE01

  4. Layout of Main Components

    A01W6Y8C01
    *1 Combination Meter Assembly *2 Automatic High Beam Indicator Light
    *3 High Beam Headlight Indicator Light *4 Automatic Light Control Sensor
    *5 Main Body ECU *6

    Headlight Dimmer Switch Assembly


    • Auto Position Signal

    • High Beam Position Signal
    *7 Steering Angle Sensor *8 Headlight Leveling ECU Assembly
    *9 Network Gateway ECU *10 ECM
    *11

    Headlight Assembly


    • High Beam Headlight

    • Low Beam Headlight

    		 *12 Skid Control ECU
    *13 Automatic High Beam Sensor (Inner Rear View Mirror Assembly) - -

  5. Function of Main Components

    Component Function
    Automatic High Beam Sensor (Inner Rear View Mirror Assembly) The automatic high beam sensor 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 headlight leveling ECU assembly via Local Interconnect Network (LIN).
    Headlight Leveling ECU Assembly The headlight leveling ECU assembly acts as the gateway between LIN and Controller Area Network (CAN).
    Main Body ECU

    • The main body ECU receives the signals from the headlight dimmer switch assembly and the automatic light control sensor.

    • The main body ECU transmits the signals to the combination meter and the front controller.
    Skid Control ECU The skid control ECU outputs information about the speed of the front right wheel. This information is used by the automatic high beam sensor to control switching between the high and low beams of the automatic high beam system.
    ECM The ECM outputs a signal to indicate that the shift lever is in R. Based on this signal, the automatic high beam sensor determines the direction of vehicle movement.
    Headlight Dimmer Switch Assembly The headlight dimmer switch assembly transmits the auto position signal and the high beam position signal to the main body ECU.
    Steering Angle Sensor The steering angle sensor outputs the steering angle.
    Combination Meter Assembly Automatic High Beam Indicator Light

    • The automatic high beam indicator light illuminates to inform the driver when the automatic high beam system is activated.

    • The automatic high beam indicator light flashes to inform the driver when a malfunction is detected in this system.
    High Beam Headlight Indicator Light The high beam headlight indicator light illuminates to inform the driver when the high beam headlights are on.
    Automatic Light Control Sensor The automatic light control sensor detects the ambient light level and transmits it to the main body ECU.

  6. Construction


    1. Automatic High Beam Sensor (Inner Rear View Mirror Assembly)


      1. The automatic high beam sensor consists of the Complementary Metal Oxide Semiconductor (CMOS) that receives images and the mirror portion that identifies light sources, and judges whether to turn high beam headlights on or off.

        A01W6MLC01
        *1 Automatic High Beam Sensor (Inner Rear View Mirror Assembly) - -

    2. Operating Condition


      1. The automatic high beam system will operate as follows:

        Item Operating Condition
        System Activation

        When all of the following conditions are met, the automatic high beam system is activated and the automatic high beam indicator light turns on:


        • The ignition switch is ON.

        • The headlight dimmer switch assembly is in the auto position and high beam position.

        • The automatic light control sensor outputs the night mode signal (to turn the headlights on).
        High Beam Headlight On

        When all of the following conditions are met, the automatic high beam system turns on the high beam headlights after a short delay:


        • Vehicle speed is more than approximately 34 km/h (21 mph).

        • The area in front of the vehicle is dark.

        • No oncoming vehicles are present with the headlights on.

        • No preceding vehicles are present with the taillights on.

        • Few streetlights are present along the street ahead.
        High Beam Headlight Off

        When any of the following conditions are met, the automatic system turns off the high beam headlights after a short delay:


        • Vehicle speed is less than approximately 27 km/h (17 mph).

        • The area in front of the vehicle is not dark.

        • An oncoming vehicle with headlights on is detected.

        • A preceding vehicle with taillights on is detected.

        • Several streetlights are present along the street ahead.

    3. Operation


      1. When passing an oncoming vehicle


        • The automatic high beam system turns the high beam headlights off when there is an oncoming vehicle before its distance reaches approximately 800 m (2625 ft).

        • When an oncoming vehicle passes the automatic high beam sensor range, the automatic high beam system turns the high beam headlights on after a short delay.

        A01W61PE01
        *1 Approx. 800 m (2625 ft.)
        *2 Delay
        *3 Camera Angle

        Tech Tips


        • The detection distance varies depending on detected objects.

        • Depending on the intensity of oncoming (and preceding) vehicle lights, the timing of turning the high beam headlights on and off will vary.

      2. When passing a preceding vehicle


        • The automatic high beam system turns the high beam headlights off when there is a preceding vehicle before its distance reaches approximately 600 m (1969 ft).

        • When a preceding vehicle passes the automatic high beam sensor range, the automatic high beam system turns the high beam headlights on after a short delay.

        A01W6N0E01
        *1 Approx. 600 m (1969 ft.)
        *2 Camera Angle
        *3 Delay

        Tech Tips

        Depending on the intensity of preceding vehicle lights, the timing of turning the high beam headlights on and off will vary.

  7. Diagnosis


    1. When the headlight leveling ECU assembly or main body ECU detects a malfunction in the automatic high beam control system, a Diagnostic Trouble Code (DTC) is stored in memory.

    2. The DTCs can be read using the Global TechStream (GTS). For details, refer to the Repair Manual.