LIGHTING SYSTEM SYSTEM DESCRIPTION


  1. ILLUMINATED ENTRY SYSTEM


    1. except Double Swing Out Type:

      When the doors are unlocked by a key or door control transmitter operation, when a door is opened or closed, or when the vehicle is approached while holding the door control transmitter, the illuminated entry system turns on the room light, map light and engine switch illumination.

      for Double Swing Out Type:

      When the doors are unlocked by a key or door control transmitter operation, when a door is opened or closed, the illuminated entry system turns on the room light and map light.


      1. The main body ECU receives the following signals (A).


        • Door control switch signal

        • Door detection switch signal

        • Ignition switch signal

      2. The main body ECU controls the following signal based on the signals listed in A.


        • Illumination operation signal

      3. The main body ECU controls the on/off and fade-in/fade-out operation of the following parts.


        • Room light

        • Map light

        • Engine switch illumination*


        • *: except Double Swing Out Type

  2. BATTERY SAVE SYSTEM


    1. The battery save system is a basic function which turns off the applicable interior lights after approximately 20 minutes if any door is left open or ajar when the ignition switch is turned off. Also, on vehicles with a dome cut relay, the system also has an interior light auto cut function, which turns off the applicable interior lights approximately 20 minutes after the ignition switch is turned off regardless of the open/close status of the doors or the position of the map light switch.

  3. MANUAL LIGHT CONTROL SYSTEM


    1. This system functions when lights such as the headlight, taillight and front fog light are illuminated by manual operation of the light control switch.


      1. The main body ECU receives the following signals (D).


        • Light control switch signal

        • Headlight dimmer switch signal

        • Front fog light switch signal

        • Rear fog light switch signal

      2. The main body ECU controls the following signals based on the signals listed in D (E).


        • Headlight relay operation signal

        • Taillight relay operation signal

        • Front fog light relay operation signal

        • Rear fog light relay operation signal

      3. The main body ECU controls the on/off operation of the following parts based on the signal listed in E.


        • Headlight (Low)

        • Headlight (High)

        • Front fog light

        • Rear fog light

  4. LIGHT AUTO TURN OFF SYSTEM


    1. When the headlight and taillight are both illuminated by the operation of the light control switch, if the ignition switch is turned off, this system turns the headlights and fog lights off immediately. However, when all the doors are locked using the door control switch, emergency key or transmitter lock switch, this system turns the headlight and taillight off immediately. Also, when only the taillight is illuminated by the operation of the light control switch, if the ignition switch is turned off and the driver door is opened, this system turns the headlight, taillights, and fog lights off immediately.


      1. The main body ECU receives the following signals (F).


        • Door courtesy light switch signal

        • Ignition switch signal

      2. The main body ECU controls the following signals based on the signals listed in F (G).


        • Headlight relay operation signal

        • Taillight relay operation signal

        • Fog light relay operation signal

      3. The main body ECU controls the on/off operation of the following parts based on the signal listed in G.


        • Headlight (Low)

        • Headlight (High)

        • Taillight

        • Front fog light

        • Rear fog light

  5. AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM (w/ Static Headlight Auto Leveling)


    1. General


      • This system adjusts the headlight low beams when the vehicle is stopped to maintain a constant level.

      • This system is controlled by the headlight leveling ECU. This ECU detects the vehicle posture via the rear height control sensor LH, and detects the vehicle speed via the combination meter. The ECU then controls the headlight leveling motor based on these pieces of information in order to change the headlight reflector angle.

      Note


      • Initialize the height control sensor signal after the vehicle height changes due to replacement of the suspension or after performing such operations as removal and reinstallation or replacement of the rear height control sensor LH.

      • Initialization is also necessary when the headlight leveling ECU is replaced.

    2. Function and construction of components

      Components Function and Construction
      Rear Height Control Sensor LH Detects the vehicle height.
      Combination Meter

      • Outputs the vehicle speed signal to the headlight leveling ECU.

      • Headlight beam level control system warning light in the combination meter illuminates for 3 seconds and then turns off when the ignition switch is turned to ON (bulb check function).

      • Headlight beam level control system warning light in the combination meter illuminates to alert the driver when a malfunction in this system is detected.
      Headlight Leveling Motor Based on the signals received from the headlight leveling ECU, each motor moves the reflector in the headlight to vary its low beam height.
      DLC3 The height control sensor signal initialization and headlight leveling motor operation check can be performed via the DLC3.
      Headlight Leveling ECU

      • Based on the signals that are transmitted by the rear height control sensor LH and combination meter, this ECU detects the amount of variance of the vehicle posture with the vehicle stopped.

      • Based on the detected value, this ECU outputs control signals to the headlight leveling motor.

      • This ECU turns on the headlight beam level control system warning light for 3 seconds when the ignition switch is turned to ON (bulb check function).

      • This ECU turns on the headlight beam level control system warning light to alert the driver when a malfunction in this system is detected.

    3. Fail-safe

      The headlight leveling ECU operates in fail-safe mode if an abnormal condition has been detected, and illuminates the automatic headlight beam level control system warning light in the combination meter when a malfunction is detected in the headlight beam level control system.

  6. AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM (w/ Dynamic Headlight Auto Leveling)


    1. General

      When the low beam headlights are on, the automatic headlight beam level control system operates the headlight leveling motor in accordance with the movement of the vehicle. The headlight swivel ECU controls the system.

    2. Function of Main Components

      Component Function and Construction
      Headlight Swivel ECU Receives various signals, calculates changes in the vehicle posture and actuates the headlight leveling motor.
      Headlight Leveling Motor

      • 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 stepper motor to precisely regulate the angle of the projectors.
      Rear Height Control Sensor LH*1 Transmits a height control sensor signal to the headlight swivel ECU.
      Suspension Control ECU*2 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.

      • *1: w/o Active Height Control Suspension

      • *2: w/ Active Height Control Suspension

    3. Initial Set Control

      When the engine is started, the headlight swivel ECU drives the headlight leveling motor, 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*.


      • *: w/o Active Height Control Suspension