LIGHTING SYSTEM > DETAILS



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).
    Power Management Control ECU
    		The power management control ECU receives the power switch push signal, outputs a READY signal and transmits it 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 when the steering pad switch assembly is operated.
    Steering Pad Switch Assembly
    		DISP Switch
    1. The DISP switch changes the menu displayed on the multi-information display to customize mode.
    2. The DISP switch can enable or disable the operation of the daytime running lights.
    Navigation Computer Sub-assembly*1
    		The navigation computer sub-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).
    Display and Navigation Module Display*2
    		The display and navigation module display 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)*3
    		The multi display changes to customize mode to display the daytime running light on/off condition when the Remote Touch is operated.
    Remote Touch*3
    1. The Remote Touch changes the menu displayed on the multi-information display to customize mode.
    2. The Remote Touch can enable or disable the operation of the daytime running lights.
    *1: Models with HDD navigation system
    *2: Models with DVD navigation system
    *3: Models with navigation system

  2. Light Emitting Diode (LED) Headlight System

    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 lights up to inform the driver when the taillights turn on.
    Master Warning Light
    		The master warning light illuminates to inform the driver when the LED driver module detects malfunctions in this system.
    Multi-information Display
    		The multi-information display displays a warning message to inform the driver when the LED driver module detects a malfunction in this system.

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

    Component
    		Function
    Headlight Leveling ECU Assembly
    1. The headlight leveling ECU assembly detects changes of vehicle movement based on the rear height control sensor RH and vehicle speed signal.
    2. The headlight leveling ECU assembly outputs control signals to the headlight leveling motors based on the detected value.
    3. This ECU provides initial set control and a fail-safe function.
    Headlight Assembly LH/RH
    		Headlight Leveling Motor LH/RH
    1. 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.
    2. 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 malfunctions in this system.

  4. Manual Headlight Beam Level Control System

    Component
    		Function
    Headlight Leveling Switch
    		Sends control signals to the headlight leveling motor.
    Headlight Assembly LH/RH
    		Headlight Leveling Motor LH/RH
    1. Based on the signals received from headlight leveling switch, each motor moves the reflector in the headlight to vary its low beam angle.
    2. 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 push signal, outputs a READY signal and transmits it 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 lights up to inform the driver when the taillights turn on.
    Multi-information Display
    		The multi-information display can be changed to customize mode to display the sensitivity of the light control sensor when the steering pad switch assembly is operated.
    Steering Pad Switch Assembly
    		DISP Switch
    1. The DISP switch changes the menu displayed on the multi-information display to customize mode.
    2. The DISP switch can be setting the operation of the automatic light control system.
    Navigation Computer Sub-assembly*1
    		The navigation computer sub-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).
    Display and Navigation Module Display*2
    		The display and navigation module display 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)*3
    		The multi display changes to customize mode to display the automatic light control system setting condition when the Remote Touch is operated.
    Remote Touch*3
    1. The Remote Touch changes the menu displayed on the multi-information display to customize mode.
    2. The Remote Touch can be setting the operation of the automatic light control system.
    *1: Models with HDD navigation system
    *2: Models with DVD navigation system
    *3: Models with navigation system

  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 push signal, outputs a READY signal and transmits it to the main body ECU (multiplex network body ECU).
    Dimmer Relay
    		The dimmer relay shuts down the power to the high beams.
    HEAD Relay
    		The HEAD relay shuts down the power to the low beams.
    TAIL Relay
    		The TAIL relay shuts down the power to the taillights, position lights and license plate lights.
    FR FOG Relay*1
    		The FR FOG relay shuts down the power to the front fog lights.
    RR FOG Relay*2
    		The RR FOG relay shuts down the 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 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).
    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 when the steering pad switch assembly is operated.
    Steering Pad Switch Assembly
    		DISP Switch
    1. The DISP switch changes the menu displayed on the multi-information display to customize mode.
    2. The DISP switch can be setting the operation of the light turn-off system.
    Navigation Computer Sub-assembly*3
    		The navigation computer sub-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).
    Display and Navigation Module Display*4
    		The display and navigation module display 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)*5
    		The multi display changes to customize mode to display the light turn-off system setting condition when the Remote Touch is operated.
    Remote Touch*5
    1. The Remote Touch changes the menu displayed on the multi-information display to customize mode.
    2. The Remote Touch can be setting the operation of the light turn-off system.
    *1: Models with front fog lights
    *2: Models with rear fog light
    *3: Models with HDD navigation system
    *4: Models with DVD navigation system
    *5: Models with navigation system

  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 door mirror 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 door mirror foot light when the steering pad switch assembly is operated.
    Steering Pad Switch Assembly
    		DISP Switch
    1. The DISP switch changes the menu displayed on the multi-information display to customize mode.
    2. The DISP switch can be setting the operation of the door mirror foot light system.
    Navigation Computer Sub-assembly*1
    		The navigation computer sub-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).
    Display and Navigation Module Display*2
    		The display and navigation module display 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)*3
    		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*3
    1. The Remote Touch changes the menu displayed on the multi-information display to customize mode.
    2. The Remote Touch can be setting the operation of the door mirror foot light system.
    *1: Models with HDD navigation system
    *2: Models with DVD navigation system
    *3: Models with navigation system


OPERATING CONDITION

  1. Daytime Running Light System

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

      1. The power switch is on (READY).
      2. The low beams are not on.

  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:
      1. The power switch is turned off or on (ACC).
      2. The driver door is closed and then opened.
      3. The headlight dimmer switch assembly is in the tail position.
      Driver Door-linked*1
      		When all of the following conditions are met, the exterior lights automatically turn off:
      1. The power switch is turned off or on (ACC).
      2. The driver door is closed and then opened.
      Driver Door-linked*2
      		When all of the following conditions are met, the exterior lights automatically turn off:
      1. The power switch is turned off or on (ACC).
      2. The driver door is closed and then opened.
      3. The headlight dimmer switch assembly is in the auto position.
      When all of the following conditions are met, the low beam automatically turn off:
      1. The power switch is turned off or on (ACC).
      2. The driver door is closed and then opened.
      3. The headlight dimmer switch assembly is in the tail or head position.
      *1: Models for G.C.C. Countries
      *2: 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 door mirror lights automatically turn on:
      1. The power switch is off.
      2. All doors are closed.
      3. The key is detected in the actuation area.
      When the following condition is met, the door mirror lights automatically turn off:
      1. The key is not detected in the actuation area.
      Door Unlock-linked
      		When all of the following conditions are met, the door mirror lights automatically turn on:
      1. The power switch is off.
      2. Any door is unlocked.
      3. All doors are closed.
      Door Lock-linked
      		When one of the following conditions is met, the door mirror lights automatically turn off:
      1. All doors are locked.
      2. All doors are closed.
      3. A door lock control switch outputs the lock signal.
      Door-linked
      		When the following condition is met, the door mirror lights automatically turn on:
      1. Any door is opened and then closed.
      Delay
      		When approximately 15 seconds elapse after one of the following conditions is met, the door mirror lights turn off:
      1. An actuation area-linked function is used.
      2. The door unlock-linked function is activated.
      3. Any door is opened and then closed.
      Shift Position-linked
      		When both of the following conditions are met, the door mirror lights automatically turn off:
      1. The power switch is turned on (IG).
      2. The shift lever is moved to R, N or D.


FUNCTION

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

    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 ECU 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 ECU 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 executes the initial setting of the stepper motors.


CONSTRUCTION

  1. LED Headlight System

    1. Projector Type LED Light


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


        Y109324E01


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

    2. Parabolic Type LED Light


      1. The optimal reflector shape contributes to effective illumination without any loss of discharged light.


        Y109325E01


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

    3. LED Driver Module

      1. 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 flowing into the LEDs at a specified level, the LED driver modules prevent the light from getting brighter and dimmer due to voltage variation.
      2. If a malfunction occurs in the LED headlight system, the LED driver module transmits a fail signal to the main body ECU (multiplex network body ECU). When the main body ECU (multiplex network body ECU) receives this fail signal, it transmits a signal to the combination meter assembly to warning the driver.


FAIL-SAFE

  1. LED Headlight System

    1. The LED driver module executes the fail-safe actions 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 reverts 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 the 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 Headlight System)

    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
      1. Stops control after returning to initial position (If failure occurs at higher than initial position).
      2. Stops control at current condition (If failure occurs at lower than initial position).
      		Flashes
      		Illuminates
      Headlight Leveling Motor
      1. Stops control after returning to initial position (If failure occurs at higher than initial position).
      2. Stops control at current condition (If failure occurs at lower than initial position).
      		Flashes
      		Illuminates


DIAGNOSIS

  1. LED Headlight System

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

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

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

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

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

  3. Automatic Light Control System

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

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