LIGHTING SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Inner Rear View Mirror Assembly 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, the sensor sends high beam request signals to the main body ECU (multiplex network body ECU).

    • Consists of a Complementary Metal Oxide Semiconductor (CMOS) camera that receives images and a mirror portion that identifies light sources and judges whether to use high beams or low beams.
    Headlight Assembly LH Headlight ECU Sub-assembly LH Receives the headlight control signal from the main body ECU (multiplex network body ECU) and changes between the high beams and low beams.
    Headlight Assembly RH Headlight ECU Sub-assembly RH
    Main Body ECU (Multiplex Network Body ECU) Receives each sensor and switch condition and illuminates or turns off the lights.
    Brake Actuator Assembly Skid Control ECU Outputs information about the average speed of the 4 wheels. 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 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.
    Combination Meter Assembly

    • Illuminates the automatic high beam indicator light 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.
    Auto High Beam Switch Outputs the switch on signal to the main body ECU (multiplex network body ECU).
    Headlight Dimmer Switch Assembly Light Control Switch Transmits the light control switch signal to the main body ECU (multiplex network body ECU).
    Dimmer Switch Transmits the dimmer switch signal to the main body ECU (multiplex network body ECU).
    Automatic Light Control Sensor Detects the ambient light level and transmits a signal to the main body ECU (multiplex network body ECU).
    Central Gateway ECU (Network Gateway ECU) Relays the signal between the CAN communication lines.

  2. SYSTEM CONTROL

    Function Operation Condition
    Active

    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 engine switch is on (IG).

    • The light control switch (headlight dimmer switch assembly) is in the AUTO or head position and the low beam headlights are on.

    • The dimmer switch (headlight dimmer switch assembly) is in the high beam position.

    • The auto high beam switch is on.

    • The shift lever is in any position other than R.
    High Beams On

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


    • Vehicle speed is more than approximately 30 km/h (19 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 Beams Off

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


    • Vehicle speed is less than approximately 25 km/h (16 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. FUNCTION


    1. When passing an oncoming vehicle:


      1. The automatic high beam system turns off the high beams before an oncoming vehicle comes within approximately 800 m (2625 ft.).

      2. When an oncoming vehicle passes out of camera sensor range, the automatic high beam system turns the high beams on after a short delay.

        B006KFCC02
        *a 800 m (2625 ft.) *b Delay
        *c Camera Sensor Angle - -

        Tech Tips


        • The detection distance varies depending on detected objects.

        • The timing of turning on and off the high beams varies depending on the intensity of oncoming (and preceding) vehicle lights.

    2. When passing a preceding vehicle:


      1. When approaching a preceding vehicle, the automatic high beam system turns off the high beams approximately 600 m (1969 ft.) before reaching it.

      2. When a preceding vehicle passes out of camera sensor range, the automatic high beam system turns the high beams on after a short delay.

        B006KGYC01
        *a 600 m (1969 ft.) *b Delay
        *c Camera Sensor Angle - -

        Tech Tips

        The timing of turning on and off the high beams varies depending on the intensity of the preceding vehicle lights.

  4. DIAGNOSIS


    1. When the main body ECU (multiplex network body ECU) detects a malfunction in the automatic high beam system, Diagnostic Trouble Codes (DTCs) are stored in memory.

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