LIGHTING SYSTEM SYSTEM DESCRIPTION


  1. AUTOMATIC LIGHT CONTROL SYSTEM

    When the light control switch is in the AUTO position, the automatic light control system detects ambient light levels and controls the low beam headlights, clearance lights, taillights and license plate lights.

  2. LIGHT AUTO TURN-OFF SYSTEM


    1. General

      The light auto turn-off system is used to prevent the exterior lights from being accidentally left on (headlights, front fog lights, taillights, clearance lights, license plate lights and rear fog lights).

    2. When all of the following conditions are met, the headlights, front fog lights, taillights, clearance lights, license plate lights and rear fog lights turn off:


      • The ignition switch is turned from ON to off.

      • The headlights, front fog lights, taillights, clearance lights, license plate lights and rear fog lights are on.

      • The driver door is opened.

  3. HID HEADLIGHT SYSTEM (for HID Headlight)

    The High Intensity Discharge (HID) headlight system uses a discharge bulb as its light source for the low beam. Discharge bulbs are superior to halogen bulbs.


    • Discharge bulbs have the following features:


      • The light emitted by the bulb is close in color to sunlight. The light shines ahead over a broader area and further forward, increasing the area visible to the driver.

      • Less power is consumed.

    • This system consists of the discharge bulbs and light control ECUs.

    • The light control ECU transforms voltage that is received from the battery to high voltage of up to 30000 V and applies it to the discharge bulbs in order to illuminate them.

  4. LED HEADLIGHT SYSTEM (for LED Headlight)


    1. LED headlights are used to provide efficient, maintenance free lighting. Compared to halogen or HID headlights, even if an LED headlight is used for a long time, the reduction of brightness over its lifetime is less. In addition, there is no possibility of an LED having an open circuit because of vibration.

    2. Function of Main Components

      Component Outline
      Light Control ECU

      • Turns on the LEDs immediately when the light control switch is turned to the head position.

      • Regulates the output current flowing into the LEDs at a specified level to prevent the light from getting brighter and dimmer due to voltage variation.

      • Transmits fail signals to the main body ECU (multiplex network body ECU) when a malfunction occurs in the LED headlight system.
      Combination Meter Assembly Master Warning Light Flashes to inform the driver when the light control ECU detects malfunctions in this system.
      Multi-information Display Displays a warning message to inform the driver when the light control ECU detects a malfunction in this system.
      Main Body ECU (Multiplex Network Body ECU)

      • Receives fail signals from the light control ECU when a malfunction occurs in the LED headlight system, and transmits the signals to the combination meter assembly.

      • Stores Diagnostic Trouble Codes (DTCs) when the system malfunctions.

  5. DAYTIME RUNNING LIGHT SYSTEM


    1. for TMC, TMMR Made:


      1. The daytime running light system is designed to automatically illuminate the daytime running lights (high-intensity clearance lights) during the daytime to make the vehicle more visible to other vehicles.


        • This system is controlled by the main body ECU (multiplex network body ECU).

        • There are 2 LED type clearance light circuits in each headlight. One is for a conventional low-intensity clearance light that illuminates with the taillights, and the other is for the high-intensity clearance light that is used for the daytime running light system.

        • This system is enabled when the following conditions are met:


          • Engine is running.

          • The light control switch is in the off or AUTO position (and the taillights are not turned on via the automatic light control system).

          • The parking brake switch is off.

    2. for TMMK Made:


      1. The daytime running light system is designed to automatically illuminate the daytime running lights during the daytime to make the vehicle more visible to other vehicles.


        • This system is controlled by the main body ECU (multiplex network body ECU).

        • This system is enabled when the following conditions are met:


          • Engine is running.

          • The light control switch is in the tail or AUTO position (and the low beam headlights are not turned on via the automatic light control system).

          • The parking brake switch is off.

            Tech Tips

            The daytime running light will turn off when a turn signal switch or the hazard warning light switch is turned on. See the following table for details.

            Light Function Vehicle Input Signal LED Illumination Condition
            Daytime Running Light Illumination Condition Clearance Light Illumination Condition Turn Signal Light or Hazard Warning Light Illumination Condition
            OFF Off Off Off Off
            Off Off Blinking Off
            DRL Mode Illuminated Off Off Illuminated at 100% brightness
            Illuminated Illuminated Off Illuminated at 100% brightness
            Illuminated Off Blinking Off
            Illuminated Illuminated Blinking Off
            Clearance Mode Off Illuminated Off Dimmed
            Off Illuminated Blinking Dimmed