LIGHTING SYSTEM DETAILS


  1. FUNCTION OF MAIN COMPONENTS


    1. Daytime Running Light System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) Receives various signals and illuminates the daytime running lights via the integration relay.

      Engine Room Relay Block and Junction Block Assembly

      - Integration Relay

      • Supplies power to the high beams to operate them as daytime running lights. (The high beams are illuminated at reduced intensity.)*1

      • Supplies power to the daytime running lights.*2
      Headlight Dimmer Switch Assembly Light Control Switch Outputs a light control signal and transmits it to the main body ECU (multiplex network body ECU).
      DRL OFF Switch*3 Outputs a DRL OFF signal and transmits it to the main body ECU (multiplex network body ECU).
      Certification ECU (Smart Key ECU Assembly)*4 Receives the ignition signal and transmits it to the instrument panel junction block assembly.
      Parking Brake Switch Assembly Outputs a parking brake operation signal to the main body ECU (multiplex network body ECU).
      DRL/Parking Driver Module*2 Turns on or off or dims the daytime running lights/parking lights in accordance with the condition of the turn signal lights or hazard warning lights.

      • *1: Models without LED type daytime running lights/parking lights

      • *2: Models with LED type daytime running lights/parking lights

      • *3: Except destination package for Canada

      • *4: Models with smart key system

    2. Light Emitting Diode (LED) Headlight System (Models with LED Headlights)

      Component Function
      Main Body ECU (Multiplex Network Body ECU) Receives the HEAD position signal from the light control switch and transmits a signal to the H-LP relay.
      Headlight Dimmer Switch Assembly Light Control Switch Outputs a light control signal and transmits it to the main body ECU (multiplex network body ECU).
      H-LP Relay Supplies power to the LED driver modules.
      Headlight Assembly Light Emitting Diode (LED) The Light Emitting Diode (LED) light shines ahead over a broader area and further forward, increasing the area visible to the driver.
      LED Driver Module Keeps a constant level of direct current applied to the LED, achieving stable LED illumination.
      Combination Meter Assembly Headlight Indicator Light*1 Lights up to inform the driver when the headlights are on.
      Taillight Indicator Light*2 Lights up to inform the driver when the taillights are on.
      Master Warning Light Illuminates to inform the driver when a LED driver module detects a malfunction in the system.
      Multi-information Display Displays a warning message to inform the driver when a LED driver module detects a malfunction in the system.

      *1: Models for U.S.A. and destination package for South Korea

      *2: Destination packages for Canada and Mexico

    3. Automatic Headlight Beam Level Control System (Models with LED Headlights)

      Component Function
      Headlight Leveling ECU Assembly

      • Detects changes of vehicle movement based on the rear height control sensor sub-assembly and vehicle speed signal.

      • Outputs control signals to the headlight leveling motors based on the detected value.

      • Provides initial set control and a fail-safe function.
      Headlight Dimmer Switch Assembly Light Control Switch Outputs a light control signal and transmits it to the main body ECU (multiplex network body ECU).
      Headlight Assembly (LH, RH) Headlight Leveling Motor (LH, RH)

      • Based on the signals received from the headlight leveling ECU assembly, each headlight leveling motor moves the projector unit in the headlight to vary its angle.

      • Each headlight leveling motor uses a stepper motor to precisely regulate the angle of the projector unit.
      Main Body ECU (Multiplex Network Body ECU) Receives a light control signal and transmits it to the headlight leveling ECU assembly.
      Rear Height Control Sensor Sub-assembly Detects vehicle movement and transmits a signal to the headlight leveling ECU assembly.
      Combination Meter Assembly Multi-information Display Displays a warning message to inform the driver when the headlight leveling ECU assembly detects a malfunction in this system.

    4. Automatic Light Control System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) Receives various signals and illuminates the headlights, taillights, parking lights, side marker lights and license plate lights.

      Engine Room Relay Block and Junction Block Assembly

      - Integration Relay

      • Supplies power to the high beams.*1

      • Supplies power to the daytime running lights/parking lights.*2
      DIMMER Relay*3 Supplies power to the high beams.
      H-LP Relay Supplies power to the low beams.
      TAIL Relay Supplies power to the taillights, parking lights*4, side marker lights and license plate lights.
      Certification ECU (Smart Key ECU Assembly)*5 Receives the ignition signal and transmits it to the instrument panel junction block assembly.
      Automatic Light Control Sensor Detects the ambient light level.
      Headlight Dimmer Switch Assembly Light Control Switch Outputs a light control signal and transmits it to the main body ECU (multiplex network body ECU).
      Combination Meter Assembly Headlight Indicator Light*6 Lights up to inform the driver when the headlights are on.
      Taillight Indicator Light*7 Lights up to inform the driver when the taillights are on.

      • *1: Models with halogen headlights

      • *2: Models with LED type daytime running lights/parking lights

      • *3: Models with LED headlights

      • *4: Models without LED type daytime running lights/parking lights

      • *5: Models with smart key system

      • *6: Models for U.S.A. and destination package for South Korea

      • *7: Destination packages for Canada and Mexico

    5. Light Automatic Turn-off System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) Receives various signals and turns off the exterior lights.
      Certification ECU (Smart Key ECU Assembly)*1

      • Receives the ignition signal and transmits it to the instrument panel junction block assembly.

      • Judges and certifies the ID code sent from the door control receiver.
      H-LP Relay Shuts down power to the low beams.

      Engine Room Relay Block and Junction Block Assembly

      - Integration Relay

      • Shuts down power to the high beams.*2

      • Shuts down power to the daytime running lights/parking lights.*3
      DIMMER Relay*4 Shuts down power to the high beams.
      TAIL Relay Shuts down power to the taillights, parking lights*5, side marker lights and license plate lights.
      Headlight Dimmer Switch Assembly Light Control Switch Outputs a light control signal and transmits it to the main body ECU (multiplex network body ECU).
      Front Door Courtesy Light Switch Assembly (LH, RH) Detects whether a door is open or closed and transmits a signal to the main body ECU (multiplex network body ECU).
      Rear Door Courtesy Light Switch Assembly (LH, RH)
      Luggage Compartment Door Courtesy Light Switch Assembly

      Front Door Lock with Motor Assembly (LH, RH)

      - Door Unlock Detection Switch

      		 Detects whether a door is locked or unlocked and transmits a signal to the main body ECU (multiplex network body ECU).

      Rear Door Lock with Motor Assembly (LH, RH)

      - Door Unlock Detection Switch
      Door Control Receiver*1 Receives the ID code from the door control transmitter in the actuation area and transmits it to the main body ECU (multiplex network body ECU) via the certification ECU (smart key ECU assembly).

      *1: Models with smart key system

      *2: Models with halogen headlights

      *3: Models with LED type daytime running lights/parking lights

      *4: Models with LED headlights

      *5: Models without LED type daytime running lights/parking lights

    6. Automatic High Beam System (Models with Lane Departure Alert System)

      Component Function
      Main Body ECU (Multiplex Network Body ECU)

      • Receives an AUTO position signal and high beam position signal from the headlight dimmer switch.

      • Receives a high beam request signal and transmits a signal to the integration relay*1 or DIMMER Relay*2.
      Lane Departure Warning 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 driving support ECU assembly via CAN.

      Engine Room Relay Block and Junction Block Assembly*1

      - Integration Relay

      		 Supplies power to the high beams.
      DIMMER Relay*2 Supplies power to the high beams.
      H-LP Relay Supplies power to the low beams.
      Driving Support ECU Assembly Acts as the gateway between the lane departure warning camera and CAN (V Bus).
      Skid Control ECU Outputs information about the average speed of the 4 wheels. This information is used by the lane departure warning camera 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 lane departure warning camera determines the direction of vehicle movement.
      Headlight Dimmer Switch Assembly Light Control Switch Transmits an AUTO position or high beam position 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).
      Combination Meter Assembly Automatic High Beam Indicator Light Illuminates to inform the driver when the automatic high beam system is activated.
      High Beam Indicator Light Illuminates to inform the driver when the high beams are on.

      *1: Models with halogen headlights

      *2: Models with LED headlights

  2. OPERATING CONDITION


    1. Daytime Running Light System


      1. The daytime running lights illuminate when all of the following conditions are met:


        • The ignition switch is ON.

        • An engine speed signal is input (engine running).

        • The headlight dimmer switch assembly is not in the DRL OFF position (except destination package for Canada).

        • The low beams are not on.

        • The parking brake is off.

      2. On models with the LED type daytime running lights/parking lights, the daytime running lights turn off when the turn signal lights or hazard warning lights are blinking. For details, refer to the table below.

        Daytime Running Light/Parking Light Mode Daytime Running Light Condition Parking Light Condition Turn Signal Light or Hazard Warning Light Condition Actual Light Condition
        OFF OFF OFF OFF OFF
        OFF OFF ON (Blink) OFF
        Daytime Running Light Mode ON OFF OFF Illuminates 100%
        ON ON OFF Illuminates 100%
        ON OFF ON (Blink) OFF
        ON ON ON (Blink) OFF
        Parking Light Mode OFF ON OFF Dimming
        OFF ON ON (Blink) Dimming

    2. Light Auto Turn-off System


      1. The light auto turn-off system operates as follows:

        Function Operation Condition
        Driver Door-linked

        When all of the following conditions are met, the exterior lights automatically turn off:


        • The ignition switch is turned from ON to off.

        • The driver door is opened.

        • The taillights are on. (The low beam headlights are off.)
        Delay

        When approximately 30 seconds elapse after all of the following conditions are met, the exterior lights turn off:


        • The ignition switch is turned from ON to off.

        • All the doors are closed after any of the doors are opened.

        • The low beam headlights are on.
        Key-linked

        When the delay function is active and the following condition is met, the exterior lights turn off immediately:


        • The lock switch on the key is pushed after all the doors are locked.

  3. FUNCTION


    1. Automatic Headlight Beam Level Control System (Models with LED Headlights)


      1. The automatic headlight beam level control system mainly consists of the headlight leveling ECU assembly, rear height control sensor sub-assembly and 2 headlight leveling motors. The headlight leveling ECU assembly controls the system.

      2. The headlight leveling ECU assembly detects the movement of the suspension from the rear height control sensor sub-assembly and the vehicle speed from the combination meter assembly.

      3. The headlight leveling ECU assembly then controls the headlight leveling motor based on this information, in order to change the headlight reflector angle.

      4. When the headlight leveling ECU assembly detects that the vehicle is stopped and the ignition switch is ON, it executes the initial setting of the stepper motors.

    2. Automatic High Beam System (Models with Lane Departure Alert System)


      1. When passing an oncoming vehicle:


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

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

          A01HWKAE08

        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:


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

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

          A01HWN7E07

          Tech Tips

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

  4. CONSTRUCTION


    1. LED Headlight System (Models with LED Headlights)


      1. Through optimization of the shape of the lenses and reflectors inside the lights, a large illumination range has been realized.

        A01HWHWE01
        Text in Illustration (Low Beam Headlights:)
        *1 Reflector *2 LED
        *a A-A Cross Section - -
        A01HWUUE01
        Text in Illustration (High Beam Headlights:)
        *1 Reflector *2 LED
        *a A-A Cross Section - -

    2. Automatic High Beam System (Models with Lane Departure Alert System)


      1. Lane Departure Warning Camera


        • The lane departure warning camera 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.

          A01HWCGE01
          Text in Illustration
          *1 Lane Departure Warning Camera *2 Camera Portion

  5. FAIL-SAFE


    1. LED Headlight System (Models with LED Headlights)


      1. The LED driver modules operate the fail-safe functions listed below in accordance with the problem that has been detected.

        Problem Outline
        Abnormal Input Voltage If the voltage that is input to the LED driver module deviates from the normal operating voltage (10 to 16 V), the LED driver module stops illuminating the headlights. It resumes illuminating the headlights once the voltage returns to the operating voltage range.
        Abnormal Output (Open Circuit or Short Circuit) If an abnormal condition (open or short) occurs in the voltage that is output by a LED driver module, the LED driver module stops illuminating the headlights and will maintain this state until power is reinstated. Power is reinstated by turning the headlight dimmer switch assembly (light control switch) from off to on.

    2. Automatic Headlight Beam Level Control System (Models with LED Headlights)


      1. If an abnormal condition such as those listed below is detected, the headlight leveling ECU assembly operates in fail-safe mode. The headlight leveling ECU assembly displays the warning message in the combination meter assembly when an abnormality in the rear height control sensor sub-assembly is detected.

        Trouble Area Condition Fail-safe Operation
        Rear Height Control Sensor Sub-assembly Signal level abnormality Holds the beam at the position of the headlight leveling actuator when abnormality is detected.
        Headlight Leveling Motor Open or short circuit

        Combination Meter Assembly

        - Vehicle Speed Signal

        		 Vehicle speed signal pulse abnormality
        Headlight Leveling ECU Assembly Voltage abnormality

  6. DIAGNOSIS


    1. LED Headlight System (Models with LED Headlights)


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

      2. DTCs can be read by using the Techstream. For details, refer to the Repair Manual.

    2. Automatic Headlight Beam Level Control System (Models with LED Headlights)


      1. When the headlight leveling ECU assembly detects a malfunction in the automatic headlight beam level control system, Diagnostic Trouble Codes (DTCs) are stored in memory.

      2. The DTCs can be read using the Techstream. For details, refer to the Repair Manual.

    3. Automatic Light Control System


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

      2. The DTCs can be read using the Techstream. For details, refer to the Repair Manual.