LIGHTING SYSTEM DETAILS


  1. FUNCTION OF MAIN COMPONENTS


    1. Daytime Running Light System (Except Destination Package for South Korea)

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

      Engine Room Junction Block Assembly

      - Running Light Relay

      		 The running light relay supplies power to the high beams to operate them as daytime running lights. (The high beams are illuminated at reduced intensity.)
      Headlight Dimmer Switch Assembly Light Control Switch Outputs a light control signal and transmits it to the main body ECU (multiplex network body ECU).
      Certification ECU (Smart Key ECU Assembly)* 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).

      • *: Models with smart key system

    2. High Intensity Discharge (HID) Headlight System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) Receives the light control signal and transmits a signal to the headlight dimmer 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).
      Headlight Assembly Discharge Bulb The discharge bulb light shines ahead over a broader area and further forward, increasing the area visible to the driver.
      Light Control ECU Transforms battery voltage to a high voltage of up to 30000 V and applies it to the discharge bulbs in order to illuminate them.
      Headlight Dimmer Relay Supplies power to the light control ECUs.

    3. Automatic Headlight Beam Level Control System (Destination Package for South Korea)

      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 its 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 Headlight Leveling Warning 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 (HID Headlight Models on Except the Destination Package for South Korea)

      Component Function
      Headlight Leveling Switch Sends control signals to the headlight leveling motor.
      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 switch, each motor moves the reflector in the headlight to vary its low beam angle.

      • This is a stepper type motor that is used to precisely regulate the angle of the reflector.
      Headlight Dimmer Relay Supplies power to the headlight assembly.

    5. Automatic Light Control System (Models with 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 Junction Block Assembly

      - Running Light Relay

      		 Supplies power to the high beams.
      Headlight Dimmer Relay The headlight dimmer relay supplies power to the low beams.

      Instrument Panel Junction Block Assembly

      - TAIL Relay

      		 The TAIL relay supplies power to the taillights, parking lights, side marker lights and license plate lights.
      Certification ECU (Smart Key ECU Assembly)*1 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*2 Lights up to inform the driver when the headlights turn on.
      Taillight Indicator Light*3 Lights up to inform the driver when the taillights turn on.

      • *1: Models with smart key system

      • *2: Models for U.S.A.

      • *3: Except models for U.S.A.

    6. 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)*

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

      • Judges and certifies the ID code from the door control receiver.
      Headlight Dimmer Relay Shuts down power to the low beams.

      Engine Room Junction Block Assembly

      - Running Light Relay

      - Front Fog Relay

      • The running light relay shuts down power to the high beams.

      • The front fog relay shuts down power to the front fog lights.

      Instrument Panel Junction Block Assembly

      - TAIL Relay

      		 Shuts down power to the taillights, parking lights, 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* 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).

      *: Models with smart key system

  2. OPERATING CONDITION


    1. Daytime Running Light System (Except Destination Package for South Korea)


      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 in the tail, auto or off* position.

        • The low beams are not on.

        • The parking brake is off.


        • *: Models for Canada

    2. Light Auto Turn-off System


      1. On models except the destination package for South Korea, 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 to ACC or turned off.

        • The driver door is closed and then opened.

        • The headlight dimmer switch assembly is in the auto position.*1

        • The headlight dimmer switch assembly is in the tail or head position.*2
        Delay

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


        • The ignition switch is turned to ACC or turned off.

        • The driver door is opened and then closed.

        • All doors are closed.

        • The headlight dimmer switch assembly is in the head or auto position.*1

        • The headlight dimmer switch assembly is in the tail or head position.*2
        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 doors are locked.

        • *1: Models with automatic light control system

        • *2: Except models with automatic light control system

      2. On the destination package for South Korea, 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 to ACC or turned off.

        • The driver door is closed and then opened.
        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 doors are locked.

  3. FUNCTION


    1. Automatic Headlight Beam Level Control System (Destination Package for South Korea)


      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.

  4. CONSTRUCTION


    1. HID Headlight System


      1. Discharge Bulb


        • Instead of the filament contained in an incandescent bulb, a discharge bulb contains an arc tube, which is filled with xenon gas and metal halide.

          A01HM8S

  5. FAIL-SAFE


    1. HID Headlight System


      1. The light control ECU 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 the light control ECU deviates from the normal operating voltage (9 to 16 V), the light control ECU stops illuminating the headlight. It resumes illuminating the headlight once the voltage reverts to the normal operating voltage. However, if the input voltage decreases after the headlights have illuminated, the headlights will remain illuminated until the input voltage becomes insufficient to light the bulbs.
        Abnormal Output (Open Circuit or Short Circuit) If an abnormal condition (open or short) occurs in the voltage that is output by the light control ECU, the light control ECU stops illuminating the headlight and will maintain this state until the power is reinstated. Power is reinstated by turning the light control switch from off to on.
        Bulb Open Circuit If a bulb is not inserted in its socket, the light control ECU stops generating high voltage until the bulb is inserted correctly and the power is reinstated. Power is reinstated by turning the light control switch from off to on or turning the ignition switch from off to ON.

    2. Automatic Headlight Beam Level Control System


      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 illuminates the headlight leveling warning light 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. Automatic Headlight Beam Level Control System (Destination Package for South Korea)


      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.

    2. Automatic Light Control System (Models with 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.