LIGHTING SYSTEM


  1. FUNCTION OF MAIN COMPONENTS


    1. Daytime Running Light System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) The main body ECU (multiplex network body ECU) receives various signals and illuminates the daytime running lights via the DRL relay.
      DRL Relay The DRL relay supplies power to the daytime running lights.
      Headlight Dimmer Switch Assembly Light Control Switch The light control switch outputs a light control signal and transmits it to the main body ECU (multiplex network body ECU).
      Parking Brake Switch Assembly The parking brake switch assembly outputs a parking brake operation signal to the main body ECU (multiplex network body ECU).
      Power Management Control ECU The power management control ECU receives the power switch operation signal and outputs a READY signal to the main body ECU (multiplex network body ECU).
      Combination Meter Assembly Multi-information Display The multi-information display changes to customize mode to display the daytime running light on/off condition by operating the steering pad switch assembly.
      Steering Pad Switch Assembly

      • The steering pad switch assembly changes the screen displayed on the multi-information display to customize mode.

      • The steering pad switch assembly can enable or disable the operation of the daytime running lights.
      Radio Receiver Assembly* The radio receiver assembly receives the remote touch signal, transmits it to the main body ECU (multiplex network body ECU) and transmits the display changing signal to the center instrument cluster finish panel assembly (multi-display).
      Center Instrument Cluster Finish Panel Assembly (Multi-display)* The multi-display changes to customize mode to display the daytime running light on/off condition when the remote touch is operated.
      Remote Touch*

      • The remote touch changes the screen displayed on the multi-display to customize mode.

      • The remote touch can be used to enable or disable the operation of the daytime running lights.

      *: Models with multi-display

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

      Component Function
      Main Body ECU (Multiplex Network Body ECU) The main body ECU (multiplex network body ECU) receives the HEAD position signal from the light control switch and transmits a signal to the HEAD relay.
      Headlight Dimmer Switch Assembly Light Control Switch The light control switch transmits a HEAD position signal to the main body ECU (multiplex network body ECU).
      HEAD Relay The HEAD 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 The LED driver module keeps a constant level of direct current applied to the LED, achieving stable LED illumination.
      Combination Meter Assembly Taillight Indicator Light The taillight indicator illuminates to inform the driver when the taillights are on.
      Master Warning Light The master warning light illuminates to inform the driver when a LED driver module detects a malfunction in the system.
      Multi-information Display The multi-information display displays a warning message to inform the driver when a LED driver module detects a malfunction in the system.

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

      Component Function
      Headlight Leveling ECU Assembly

      • The headlight leveling ECU assembly detects changes of vehicle movement based on the rear height control sensor LH and vehicle speed signal.

      • The headlight leveling ECU assembly outputs control signals to the headlight leveling motors based on the detected value.

      • This ECU provides initial set control and a fail-safe function.
      Headlight Assembly LH/RH Headlight Leveling Motor LH/RH

      • Based on the signals received from 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) The main body ECU (multiplex network body ECU) receives a HEAD position signal from the light control switch and transmits it to the headlight leveling ECU assembly.
      Headlight Dimmer Switch Assembly Light Control Switch The light control switch transmits a HEAD position signal to the main body ECU (multiplex network body ECU).
      Rear Height Control Sensor Assembly LH The rear height control sensor assembly LH detects vehicle movement and transmits a signal to the headlight leveling ECU assembly.
      Combination Meter Assembly The combination meter assembly transmits a vehicle speed signal to the headlight leveling ECU assembly.
      Combination Meter Assembly Automatic Headlight Beam Level Indicator Light The automatic headlight beam level indicator light flashes to inform the driver when the headlight leveling ECU assembly detects a malfunction in this system.

    4. Manual Headlight Beam Level Control System

      Component Function
      Headlight Leveling Switch The headlight leveling switch sends control signals to the headlight leveling motor.
      Headlight Assembly LH/RH Headlight Leveling Motor LH/RH

      • Based on the signals received from headlight leveling switch, each motor moves the reflector in the headlight to vary its low beam angle.

      • Each headlight leveling motor uses a stepper motor to precisely regulate the angle of the reflector.

    5. Automatic Light Control System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) The main body ECU (multiplex network body ECU) receives various signals and illuminates the headlights, taillights, position lights and license plate lights.
      Dimmer Relay The dimmer relay supplies power to the high beams.
      HEAD Relay The HEAD relay supplies power to the low beams.
      TAIL Relay The TAIL relay supplies power to the taillights, position lights and license plate lights.
      Power Management Control ECU The power management control ECU receives the power switch operation signal and outputs a READY signal to the main body ECU (multiplex network body ECU).
      Automatic Light Control Sensor The automatic light control sensor detects the ambient light level.
      Headlight Dimmer Switch Assembly Light Control Switch The light control switch transmits an AUTO position signal to the main body ECU (multiplex network body ECU).
      Combination Meter Assembly Taillight Indicator Light The taillight indicator illuminates to inform the driver when the taillights are on.
      Multi-information Display The multi-information display can be changed to customize mode to display the sensitivity of the light control sensor by operating the steering pad switch assembly.
      Steering Pad Switch Assembly

      • The steering pad switch assembly changes the screen displayed on the multi-information display to customize mode.

      • The steering pad switch assembly switch can be used to set the operation of the automatic light control system.
      Radio Receiver Assembly* The radio receiver assembly receives the remote touch signal, transmits it to the main body ECU (multiplex network body ECU) and transmits the display changing signal to the center instrument cluster finish panel assembly (multi-display).
      Center Instrument Cluster Finish Panel Assembly (Multi-display)* The multi-display changes to customize mode to display the automatic light control system setting condition when the remote touch is operated.
      Remote Touch*

      • The remote touch changes the screen displayed on the multi-display to customize mode.

      • The remote touch can be used to set the operation of the automatic light control system.

      *: Models with multi-display

    6. Light Auto Turn-off System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) The main body ECU (multiplex network body ECU) receives various signals and turns off the exterior lights.
      Power Management Control ECU The power management control ECU receives the power switch operation signal and outputs a READY signal to the main body ECU (multiplex network body ECU).
      Dimmer Relay The dimmer relay shuts off power to the high beams.
      HEAD Relay The HEAD relay shuts off power to the low beams.
      TAIL Relay The TAIL relay shuts off power to the taillights, position lights and license plate lights.
      FR FOG Relay*1 The FR FOG relay shuts off power to the front fog lights.
      RR FOG Relay*2 The RR FOG relay shuts off power to the rear fog light.
      Headlight Dimmer Switch Assembly Light Control Switch The light control switch transmits a light control position signal to the main body ECU (multiplex network body ECU).
      Courtesy Switch Front LH/RH, Rear LH/RH, Back Door The courtesy switch detects whether a door is open or closed and transmits a signal to the main body ECU (multiplex network body ECU).
      Door Unlock Detection Switch Front LH/RH, Rear LH/RH The 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).
      Door Control Receiver The door control receiver receives the ID code from a key in the actuation area and transmits it to the main body ECU (multiplex network body ECU) via the certification ECU (smart key ECU assembly).
      Certification ECU (Smart Key ECU Assembly) The certification ECU (smart key ECU assembly) judges and certifies the ID code from the door control receiver.
      Combination Meter Assembly Multi-information Display The multi-information display can be changed to customize mode to display the operation time of the light turn-off by operating the steering pad switch assembly.
      Steering Pad Switch Assembly

      • The steering pad switch assembly changes the screen displayed on the multi-information display to customize mode.

      • The steering pad switch assembly can be used to set operation of the light turn-off system.

      *1: Models with front fog lights

      *2: Models with rear fog light

    7. Door Mirror Foot Light System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) The main body ECU (multiplex network body ECU) receives various signals and illuminates the foot lights.
      Door Lock Switch Driver, Front Passenger The door lock switch outputs the lock/unlock signal to the main body ECU (multiplex network body ECU) or multiplex network master switch assembly.
      Certification ECU (Smart Key ECU Assembly) The certification ECU (smart key ECU assembly) judges and certifies the ID code.
      Power Management Control ECU The power management control ECU receives the shift lever position signals from the shift lever position sensor (select sensor, shift sensor) and transmits them to the main body ECU (multiplex network body ECU).
      Courtesy Switch Front LH/RH, Rear LH/RH, Back Door The courtesy switch detects whether a door is open or closed and transmits a signal to the main body ECU (multiplex network body ECU).
      Door Unlock Detection Switch Front LH/RH, Rear LH/RH The 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).
      Multiplex Network Master Switch Assembly The multiplex network master switch assembly sends the driver side door lock switch signal to the main body ECU (multiplex network body ECU).
      Combination Meter Assembly Multi-information Display The multi-information display can be changed to customize mode to display the operation time of the foot lights by operating the steering pad switch assembly.
      Steering Pad Switch Assembly

      • The steering pad switch assembly changes the screen displayed on the multi-information display to customize mode.

      • The steering pad switch assembly can be used to set the operation of the door mirror foot light system.
      Radio Receiver Assembly* The radio receiver assembly receives the remote touch signal, transmits it to the main body ECU (multiplex network body ECU) and transmits the display changing signal to the center instrument cluster finish panel assembly (multi-display).
      Center Instrument Cluster Finish Panel Assembly (Multi-display)* The multi-display changes to customize mode to display the door mirror foot light system setting condition when the remote touch is operated.
      Remote Touch*

      • The remote touch changes the screen displayed on the multi-display to customize mode.

      • The remote touch can be used to set the operation of the door mirror foot light system.

      *: Models with multi-display

    8. Welcome Light Illumination System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) The main body ECU (multiplex network body ECU) receives various signals and illuminates the position lights, taillights and license plate lights.
      TAIL Relay The TAIL relay shuts off power to the taillights, position lights and license plate lights.
      Automatic Light Control Sensor The automatic light control sensor detects the ambient light level.
      Certification ECU (Smart Key ECU Assembly) The certification ECU (smart key ECU assembly) judges and certifies the ID code set from the door control receiver.

    9. Follow Me Home System (Models for Europe)

      Component Function
      Main Body ECU (Multiplex Network Body ECU) The main body ECU (multiplex network body ECU) receives a light control signal and illuminates the headlights (low beams).
      HEAD Relay The HEAD relay shuts off power to the low beams.
      TAIL Relay The TAIL relay shuts off power to the taillights, position lights and license plate lights.
      Headlight Dimmer Switch Assembly Light Control Switch The light control switch transmits a light control position signal to the main body ECU (multiplex network body ECU).

  2. OPERATING CONDITION


    1. Daytime Running Light System


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


        • The power switch is on (READY).

        • The low beams are not on.

        • The parking brake is off.

    2. Light Auto Turn-off System


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

        Function Operation Condition
        Headlight or Front Fog Light*1 Auto Turn-off*2

        When all of the following conditions are met, the headlights or front fog lights*1 automatically turn off:


        • The power switch is turned off.

        • The headlight dimmer switch assembly is in the tail or head position.

        • The front fog light switch is on.*1
        Exterior Light Auto Turn-off*2

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


        • The power switch is turned off.

        • The headlight dimmer switch assembly is in the auto position.
        Driver Door-linked*3

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


        • The power switch is turned off or on (ACC).

        • The driver door is closed and then opened.

        *1: Models with front fog lights

        *2: Models for Europe

        *3: Except models for Europe

    3. Door Mirror Foot Light System


      1. The door mirror foot light system operates as follows:

        Function Operation Condition
        Actuation Area-linked

        When all of the following conditions are met, the foot lights automatically turn on:


        • The power switch is off.

        • All doors are closed.

        • The key is detected in the actuation area.

        When the following condition is met, the foot lights automatically turn off:

        The key is not detected in the actuation area.
        Door Unlock-linked

        When all of the following conditions are met, the foot lights automatically turn on:


        • The power switch is off.

        • Any door is unlocked.

        • All doors are closed.
        Door Lock-linked

        When one of the following conditions is met, the foot lights automatically turn off:


        • All doors are locked.

        • All doors are closed.

        • A door lock control switch outputs the lock signal.
        Door-linked

        When the following condition is met, the foot lights automatically turn on:

        Any door is opened and then closed.
        Delay

        When approximately 15 seconds elapse after one of the following conditions is met, the foot lights turn off:


        • An actuation area-linked function is used.

        • The door unlock-linked function is activated.

        • Any door is opened and then closed.
        Power switch-linked When the power switch is turned on (IG), the foot lights automatically turn off.

    4. Welcome Light Illumination System


      1. The welcome light illumination system operates as follows:

        Function Operation Condition
        Door Unlock-linked

        When all of the following conditions are met, the position lights, taillights and license plate lights automatically turn on:


        • The power switch is off.

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

        • The automatic light control sensor operation is performed.

        • A wireless door unlock operation or entry door unlock operation is performed.
        Door Lock-linked

        When any of the following conditions are met, the position lights, taillights and license plate lights automatically turn off:


        • The power switch is turned on (IG).

        • The headlight dimmer switch assembly is not in the auto position.

        • A wireless door lock operation is performed.

        • An entry door lock operation is performed.

    5. Follow Me Home System (Models for Europe)


      1. The follow me home system operates if the lever of the headlight dimmer switch is pulled and released when both of the following conditions are met:


        • The power switch is off.

        • The headlight dimmer switch assembly is in the auto or off position.

  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 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 assembly LH 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 power switch is on (READY), the ECU adjusts the stepper motors to their initial setting.

  4. CONSTRUCTION


    1. LED Headlight System


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

        A004UZIE03
        Text in Illustration
        *1 Reflector *2 LED
        *a A-A Cross Section - -

      2. LED Driver Module


        • When the light control switch is turned on, the LED driver modules immediately turn on the LEDs (approximately 0.1 seconds). In addition, by regulating the output current to the LEDs at a specified level, the LED driver modules prevent the light from getting brighter and dimmer due to voltage variation.

        • If a malfunction occurs in the LED headlight system, the LED driver module transmits a malfunction signal to the main body ECU (multiplex network body ECU). When the main body ECU (multiplex network body ECU) receives this malfunction signal, it transmits a signal to the combination meter assembly to warn the driver.

  5. FAIL-SAFE


    1. LED Headlight System


      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 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 the 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 the headlight leveling ECU assembly detects a malfunction in the automatic headlight beam level control system, it will take the actions indicated in the table below.

        Trouble Area System Operation Automatic Headlight Level Indicator Light Master Warning Light
        Headlight Leveling ECU Assembly Stops at current condition. - -
        Vehicle Speed Signal Continues control only when the vehicle is stopped. Flashes Illuminates
        Rear Height Control Sensor Assembly Signal

        • Stops control after returning to the initial position (If malfunction occurs at a position higher than the initial position).

        • Stops control at current condition (If failure occurs at a position lower than the initial position).

        		 Flashes Illuminates
        Headlight Leveling Motor

        • Stops control after returning to the initial position (If malfunction occurs at a position higher than the initial position).

        • Stops control at current condition (If failure occurs at a position lower than the initial position).

        		 Flashes Illuminates

  6. DIAGNOSIS


    1. LED Headlight System


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