LIGHTING SYSTEM SYSTEM DESCRIPTION


  1. AUTOMATIC LIGHT CONTROL SYSTEM

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

  2. LIGHT AUTO TURN-OFF SYSTEM (w/ Light Auto Turn-off Delay Function)

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

    This system has the following functions.

    Function Outline
    Delay Function

    The exterior lights automatically turn off after 30 seconds when all of the following conditions are met:


    • The low beam headlights are on (headlight dimmer switch is in the AUTO position).

    • The engine switch is turned from on (IG) to off.

    • All doors (including luggage compartment door) are closed after driver door is opened.

  3. LIGHT AUTO TURN-OFF SYSTEM (w/ Follow Me Home System)

    The light auto turn-off system is used to prevent the driver from leaving the vehicle with the headlights, front fog lights*1, rear fog lights*2, clearance lights, taillights or license plate lights on.

    Switch Condition Outline
    Light control switch in AUTO position While the lights (headlights, front fog lights*1, rear fog lights*2, clearance lights, taillights or license plate lights) are turned on, this control automatically turns them off when the engine switch is turned from on (IG) to off.
    Light control switch in tail or head position While the lights (headlights, front fog lights*1, rear fog lights*2, clearance lights, taillights or license plate lights) are turned on, this control automatically turns off only headlights and the front fog lights*1 when the engine switch is turned from on (IG) to off.

    • *1: w/ Front Fog Light

    • *2: w/ Rear Fog Light

  4. LIGHT AUTO TURN-OFF SYSTEM (w/o Light Auto Turn-off Delay Function, w/o Follow Me Home System)


    • *1: w/ Front Fog Light

    • *2: w/ Rear Fog Light

    The light auto turn-off system is used to prevent the driver from leaving the vehicle with the headlights, front fog lights*1, rear fog lights*2, clearance lights, taillights or license plate lights on. When all of the following conditions are met, the exterior lights turn off:


    • The engine switch is turned from on (IG) to off.

    • The headlights, front fog lights*1, rear fog lights*2, clearance lights, taillights, or license plate lights are on.


    • The driver door is opened.

  5. FOLLOW ME HOME SYSTEM (w/ Follow Me Home System)


    1. The follow me home system is designed to illuminate the low beam headlights, clearance lights, taillights or license plate lights and for certain period after the vehicle is parked.


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

      2. This system is enabled when the following conditions are met:


        • The engine switch is off.

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

        • The headlight dimmer switch is pulled to flash headlights once.

  6. DAYTIME RUNNING LIGHT SYSTEM


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


      • The main body ECU controls this system.


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


        • The engine switch is on (IG).


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

        • Parking brake is released.

        • Headlight dimmer switch not in the DRL OFF position. (w/ DRL OFF switch)

        • Headlight dimmer switch is in the off (w/o DRL OFF switch), tail or AUTO position (and the low beam headlights are not turned on via the automatic light control system).

  7. HID HEADLIGHT SYSTEM

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


    • Discharge headlight 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 headlight bulbs and headlight light control ECUs.

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

  8. LANE CHANGE FLASHER AND TURN CANCEL FUNCTION


    1. General


      • The lane change flasher function flashes the turn signal lights the customized number of times when the headlight dimmer switch is moved to the lane change position, and then automatically turns off the lights.

      • After the headlight dimmer switch has been moved to the turn position, the turn cancel function turns off the turn signal lights when the headlight dimmer switch is moved to the lane change position corresponding to the turn direction (The "same-direction cancel function", which can cancel a turn signal when the headlight dimmer switch is moved in the same direction, can be selected using the customize function).

        A01FDF7E01
        Text in Illustration
        *A for LHD *B for RHD
        *C for LH Side *D for RH Side
        *1 Right Turn *2 Right Lane Change
        *3 NEUTRAL *4 Left Lane Change
        *5 Left Turn - -

  9. AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM (w/o AFS)


    1. General

      When the low beam headlights are on and the engine is running, the automatic headlight beam level control system operates the headlight swivel motor (leveling portion) in accordance with the movement of the vehicle. The headlight swivel ECU controls the system.

    2. Function of Main Components

      Component Outline
      Headlight Swivel ECU Receives various signals, calculates changes in the vehicle posture and actuates the headlight swivel motor (leveling portion).
      Headlight Swivel Motor (leveling portion)

      • Based on the signals received from the headlight swivel ECU, the motors move the reflectors in the headlights to vary the low beam angle.

      • Uses a DC motor to precisely regulate the angle of the projectors.
      Rear Height Control Sensor LH Transmits a height control sensor signal to the headlight swivel ECU.
      Skid Control ECU Transmits a speed sensor signal to the headlight swivel ECU.
      ECM Transmits an engine running status signal to the headlight swivel ECU.
      Main Body ECU Transmits a headlight status signal.

    3. Initial Set Control

      When the engine is started, the headlight swivel ECU drives the headlight swivel motor (leveling portion), moving the headlight reflector to the lower limit position and returning it to the proper position. The headlight swivel ECU thus assesses the position of the headlight for reference control.

      Note


      • Initialize the headlight swivel ECU after the headlight swivel ECU is replaced.

      • Initialize the headlight swivel ECU (set the zero point of the height control sensor in the headlight swivel ECU) after the vehicle height changes due to replacement of suspension components or after performing such operations as removal and reinstallation or replacement of the rear height control sensor LH.

  10. AFS (Adaptive Front-lighting System) (w/ AFS)


    1. General


      • An Adaptive Front-lighting System (AFS) is used in order to ensure a wide low beam lighting area and realize excellent visibility during turns by moving the low beam.

      • The AFS uses medium-to-high speed control and low speed control. During medium-to-high speed control, the system calculates the target lighting angle based on the steering angle and vehicle speed and changes the swivel angle of the low beam headlights individually. During low speed control, the system calculates the target lighting angle based on the steering angle and vehicle speed and changes the swivel angle of the low beam headlight on the side facing into the turn.

      • The AFS operates the headlight swivel motor (leveling portion) in accordance with the movement of the vehicle.

    2. Function of Main Components

      Component Outline
      Headlight Swivel ECU Receives various signals, calculates the target lighting angle and actuates the headlight swivel actuator.
      Headlight Swivel Motor

      • Driven by the headlight swivel ECU, the motor moves the low beam left or right to the angle calculated by the headlight swivel ECU.

      • Based on the signals received from the headlight swivel ECU, the motors move the reflectors in the headlights to vary the low beam angle.

      • A DC motor is used for the headlight swivel motor. The headlight swivel ECU determines the low beam angle based on the number of steps (position) of the DC motor.
      Steering Angle Sensor (Spiral with Sensor Cable) Detects the steering angle and direction and outputs this signal to the headlight swivel ECU.
      Headlight Swivel Main Switch Pressing this switch disables the operation of the AFS.
      Skid Control ECU Transmits a speed sensor signal to the headlight swivel ECU.
      ECM

      • Transmits an engine running status signal to the headlight swivel ECU.

      • Transmits a shift position signal to the headlight swivel ECU. The headlight swivel ECU determines whether the vehicle is moving forward or backward based on this signal.
      Main Body ECU Transmits a headlight status signal.
      Combination Meter AFS OFF Indicator Light When the system malfunctions, the combination meter flashes the AFS OFF indicator light based on the signal from the headlight swivel ECU to alert the driver.

    3. Low Speed Control

      The headlight swivel ECU performs low speed control when all of the following conditions are met:


      • Engine is running.


      • Vehicle is moving forward at a speed of 10 km/h (6 mph) or more and less than 30 km/h (19 mph).

      • Low beam headlights are on.

      • AFS on/off condition is on.

      Swivel Angle Range (for LHD)
      Driving Condition Low Beam
      Left Right
      Right Turn 0° Fixed 0° to 10° to Right
      Left Turn 0° to 20° to Left 0° Fixed
      Swivel Angle Range (for RHD)
      Driving Condition Low Beam
      Left Right
      Right Turn 0° Fixed 0° to 20° to Left
      Left Turn 0° to 10° to Right 0° Fixed

      Tech Tips

      Control begins when the vehicle speed exceeds 10 km/h (6 mph). Even if the vehicle speed drops, control continues as long as the vehicle speed is 5 km/h (3 mph) or more.

    4. Medium-to-High Speed Control

      The headlight swivel ECU performs medium-to-high speed control when all of the following conditions are met:


      • Engine is running.

      • Vehicle is moving forward at a speed of 30 km/h (19 mph) or more.

      • Low beam headlights are on.

      • AFS on/off condition is on.

      Swivel Angle Range (for LHD)
      Driving Condition Low Beam
      Left Right
      Right Turn 0° to 5° to Right 0° to 10° to Right
      Left Turn 0° to 15° to Left 0° to 7.5° to Left
      Swivel Angle Range (for RHD)
      Driving Condition Low Beam
      Left Right
      Right Turn 0° to 7.5° to Left 0° to 15° to Left
      Left Turn 0° to 10° to Right 0° to 5° to Right

    5. Operation Stop Condition

      The headlight swivel ECU stops the control when any of the following conditions is met:


      • Engine is stopped.

      • Vehicle is moving forward at a speed of less than 5 km/h (3 mph).

      • Steering angle is less than 6°.

      • Low beam headlights are off.

      • AFS on/off condition is off.

      • Shift lever in R or N.

    6. Initial Set Control

      When the engine is started, the headlight swivel ECU drives the headlight swivel motor, moving the projector headlight to the operation limit in the direction toward the vehicle center and returning it to the proper position. The headlight swivel ECU thus assesses the position of the headlight for reference control.

      Note


      • Initialize the headlight swivel ECU after the headlight swivel ECU is replaced.

      • Initialize the headlight swivel ECU (set the zero point of the rear height control sensor LH in the headlight swivel ECU) after the vehicle height changes due to replacement of suspension components or after performing such operations as removal and reinstallation or replacement of the rear height control sensor LH.

  11. AUTOMATIC HIGH BEAM SYSTEM (w/ Automatic High Beam System)


    1. General

      The automatic high beam system enhances the illumination of the area to the front of the vehicle to improve visibility for the driver. It works by detecting light from the front using the camera built into the inner rear view mirror and switching between the high beams and low beams automatically.

    2. Function of Main Components

      Component Outline
      Inner Rear View Mirror (Automatic High Beam Sensor) Determines when to switch between the high beams and low beams 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 headlight swivel ECU via the LIN communication.
      Headlight Swivel ECU Acts as the gateway between the inner rear view mirror (automatic high beam sensor) which uses LIN communication and CAN communication. In addition, it stores Diagnostic Trouble Codes (DTCs) if an inner rear view mirror (automatic high beam sensor) malfunction occurs.
      Integration Control and Panel (Automatic High Beam Main Switch) Acts as the main switch to turn the automatic high beam system on and off.
      Yaw Rate Sensor Outputs the yaw rate signal to the headlight swivel ECU.
      Skid Control ECU Outputs the information about the speed of the front wheel. This information is used by the inner rear view mirror (automatic high beam sensor) to control switching between the high beams 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 inner rear view mirror (automatic high beam sensor) turns the high beams off.
      Combination Meter

      Displays the automatic high beam indicator light when it receives illuminate request signals from the main body ECU (multiplex network body ECU).

      Tech Tips


      • The automatic high beam indicator light illuminates to inform the driver when the automatic high beam system is activated.

      • The automatic high beam indicator light may turn off when there is bad weather (thick fog, heavy rain, etc.), an abnormal condition with the front windshield (snow, ice, etc.), or an obstruction to the camera field of view (parking tag, etc.).
      Main Body ECU

      • Receives the light control switch AUTO or head position and dimmer switch high position signals from the headlight dimmer switch, receives the automatic light control sensor signal to determine the low beam headlight illumination condition, and sends this information to the headlight swivel ECU. This is used to put the automatic high beam system in standby mode.

      • Receives high beam drive request signals from the headlight swivel ECU.

      • Performs illumination control for the automatic high beam system and stores Diagnostic Trouble Codes (DTCs) when the system malfunctions.

    3. Basic Function


      1. When all of the following conditions are met, the automatic high beam system is activated and the automatic high beam indicator light turns on:


        1. The engine switch is on (IG).

        2. The headlight dimmer switch is in the AUTO or head position and the low beam headlights are on.

        3. The headlight dimmer switch is in the high position.

        4. The integration control and panel (automatic high beam main switch) is on.

      2. When all of the following conditions are met, the low beams automatically change to the high beam after a short delay:


        • The vehicle speed is more than approximately 40 km/h (25 mph)*1 or 34 km/h (21 mph)*2.

        • The area in front of the vehicle is dark.

        • There are no oncoming vehicles with headlights on.

        • There are no preceding vehicles with taillights on.

        • There are few streetlights along the street ahead.


        • *1: w/ Follow Me Home System

        • *2: w/o Follow Me Home System

      3. When any of the following conditions are met, the high beams automatically change to the low beams after a short delay:


        • The vehicle speed is less than 31 km/h (19 mph)*1 or 27 km/h (17 mph)*2.

        • The level of ambient light is higher than a specified threshold.

        • There are oncoming vehicles with headlights on.

        • There are preceding vehicles with taillights on.

        • There are several streetlights along the street ahead.


        • *1: w/ Follow Me Home System

        • *2: w/o Follow Me Home System

      4. When any of the following conditions are met, the automatic high beam system will be canceled and the indicator light will turn off.


        • The engine switch is turned off.

        • The light control switch is turned to any position except the AUTO or head position.

        • The dimmer switch is moved to the low position.

        • The integration control and panel (automatic high beam main switch) is off.

        Tech Tips

        It is possible to manually switch between the high beams and low beams using either of the following operations:


        • The integration control and panel (automatic high beam main switch) is off. In this case, the high beams turn on according to the headlight dimmer switch high position. To change to the low beams, move the headlight dimmer switch to the low position.


        • To change to the low beams, move the headlight dimmer switch to the low position.

        Tech Tips

        The automatic high beam system monitors the area in front of the vehicle using the camera built into the inner rear view mirror and makes a judgment to change from the low beams to the high beams when the surrounding area is dark (there are no headlights from oncoming vehicles and no taillights from vehicles in front). High beam control limitations:


        • When the surrounding area is not dark enough, the low beams will not change to the high beams even if the low beam headlights are turned on by the automatic light control system and the automatic high beam indicator light on the combination meter illuminates. (The light level sufficient to turn the auto low beams on is not the same as the light level required to automatically change the low beams to the high beams.)


        • When an oncoming vehicle suddenly appears at a sharp curve or a vehicle crosses the path of the vehicle, the high beams may not change to the low beams.


        • When the fog lights of an oncoming vehicle are detected, the high beams may change to the low beams.


        • The timing of the change between the high beams and low beams may differ depending on the brightness of headlights or fog lights from oncoming vehicles or the taillights of preceding vehicles.


        • The timing of the change between the high beams and low beams may differ between normal conditions (good weather) and when driving on wet, frozen or snowy roads.

        • The timing of the change between the high beams and low beams may differ depending on the number of occupants and amount of cargo present.


        • Be aware that on some occasions, the high beams and low beams may change unexpectedly.

        Tech Tips

        The camera built into the inner rear view mirror continually monitors the light level in the area in front of the vehicle. There is a delay in switching the low beams to the high beams. Even when there is no ambient light, the low beams will not change to the high beams immediately. The delay will vary depend on the situation.