LIGHTING SYSTEM SYSTEM DESCRIPTION


  1. AUTOMATIC LIGHT CONTROL SYSTEM (w/ Automatic Light Control System)


    1. General

      When the light control switch is in the AUTO position, the rain sensor detects ambient light levels and outputs a signal to the main body ECU. The main body ECU controls the low beam headlights, front clearance lights, taillights and license plate lights according to the signal from the automatic light control sensor.

    2. Fail-safe

      If the main body ECU detects a malfunction in the rain sensor, the main body ECU performs fail-safe control to prohibit automatic light control. If the headlights or taillights are on, the lights remain on until the light control switch is turned off.

  2. LIGHT AUTO TURN-OFF SYSTEM


    1. General

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

      *: w/ Front Fog Light

    2. When the light control switch is in the AUTO*1, tail or head position and the driver side door is opened with the ignition switch off, the headlights, front fog lights*2, rear fog lights, clearance lights, taillights and license plate lights turn off.

      *1: w/ Automatic Light Control System

      *2: w/ Front Fog Light

    3. When the ignition switch is turned off with the light control switch in the head position, the headlights and front fog lights* turn off.

      *: w/ Front Fog Light

    4. w/ Front Fog Light:

      When the ignition switch is turned off with the light control switch in the tail position, the front fog lights turn off.

  3. FOLLOW ME HOME SYSTEM (w/ Automatic Light Control System)


    1. The follow me home system is designed to illuminate the low beam headlights for certain period after the vehicle is parked.


      1. This system is controlled by the main body ECU.

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


        • The ignition switch is off.

        • The light control switch is in the off or AUTO position.

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

  4. DAYTIME RUNNING LIGHT SYSTEM (w/ Daytime Running Light)


    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 ignition switch is ON.


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

        • The light control switch is in the off or AUTO* position (and the tail lights are not turned on via the automatic light control system).

        • The parking brake is released.

      *: w/ Automatic Light Control System

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


    1. General


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

      • The automatic headlight beam level control system mainly consists of the headlight swivel ECU assembly, rear height control sensor sub-assembly and two headlight leveling motors. The headlight swivel ECU assembly controls the system.

      • The headlight swivel ECU assembly calculates changes in the vehicle posture based on signals from the rear height control sub-assembly sensor and each ECU.

      • The ECU then controls the headlight leveling motor based on this information, in order to change the headlight beam angle.

      Note


      • Initialize the rear height control sensor sub-assembly 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 sub-assembly.

      • When the headlight swivel ECU assembly is replaced, the initialization is also necessary.

    2. Function of Main Components

      Component Outline
      Headlight Swivel ECU Assembly

      • Calculates changes in the vehicle posture based on the signals from the rear height control sensor and each ECU.

      • Outputs a control signal to the headlight leveling motor, based on the detected value.

      • Provides initial set control, a fail-safe function and diagnosis function.
      Headlight Leveling Motor

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

      • Uses a step motor to precisely regulate the angle of the reflectors.
      Rear Height Control Sensor Sub-assembly Detects the height of the rear of the vehicle.
      Brake Actuator Assembly (Skid Control ECU) Transmits the speed sensor signal (front LH and RH) to the headlight swivel ECU assembly.
      ECM Transmits the engine running status signal to the headlight swivel ECU assembly.
      Main Body ECU (Instrument Panel Junction Block Assembly) Transmits the low beam headlight status signal.
      Combination Meter Assembly Multi-information Display Warning When the system malfunctions, the meter alerts the driver by displaying a warning message in accordance with the signal from the headlight swivel ECU assembly.

    3. Initial Set Control

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

    4. Fail-safe

      If the headlight swivel ECU assembly detects a malfunction in the automatic headlight beam level control system, the headlight swivel ECU assembly performs fail-safe control. At the same time, the combination meter displays a warning message in order to inform the driver of the problem.

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


    1. General


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

      • The automatic headlight beam level control system mainly consists of the headlight leveling ECU assembly, rear height control sensor sub-assembly and two headlight leveling motors. The headlight leveling ECU assembly controls the system.

      • The headlight leveling ECU assembly calculates changes in the vehicle posture based on signals from the rear height control sub-assembly sensor and each ECU.

      • The ECU then controls the headlight leveling motor based on this information, in order to change the headlight beam angle.

      Note


      • Initialize the rear height control sensor sub-assembly 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 sub-assembly.

      • When the headlight leveling ECU assembly is replaced, the initialization is also necessary.

    2. Function of Main Components

      Component Outline
      Headlight Leveling ECU Assembly

      • Calculates changes in the vehicle posture based on the signals from the rear height control sensor and each ECU.

      • Outputs a control signal to the headlight leveling motor, based on the detected value.

      • Provides initial set control, a fail-safe function and diagnosis function.
      Headlight Leveling Motor

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

      • Uses a step motor to precisely regulate the angle of the reflectors.
      Rear Height Control Sensor Sub-assembly Detects the height of the rear of the vehicle.
      Brake Actuator Assembly (Skid Control ECU) Transmits the speed sensor signal (front LH and RH) to the headlight swivel ECU assembly.
      ECM Transmits the engine running status signal to the headlight swivel ECU assembly.
      Main Body ECU (Instrument Panel Junction Block Assembly) Transmits the low beam headlight status signal.
      Combination Meter Assembly Multi-information Display Warning When the system malfunctions, the meter alerts the driver by displaying a warning message in accordance with the signal from the headlight leveling ECU assembly.

    3. Initial Set Control

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

    4. Fail-safe

      If the headlight leveling ECU detects a malfunction in the automatic headlight beam level control system, the headlight leveling ECU performs fail-safe control. At the same time, the combination meter illuminates the warning message indicator light in order to inform the driver of the problem.

  7. INTELLIGENT AFS (ADAPTIVE FRONT-LIGHTING SYSTEM) [w/ AFS]


    1. General

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

      Swivel Angle Range (for LHD)
      Driving Condition Headlight Unit
      Left Right

      Right Turn

      (Vehicle speed: 10 to 30 km/h [6 to 19 mph])

      		 0° 0° to 10° to Right

      Left Turn

      (Vehicle speed: 10 to 30 km/h [6 to 19 mph])

      		 0° to 15° to Left 0°

      Right Turn

      (Vehicle speed: 30 km/h [19 mph] or higher)

      		 0° to 5° to Right 0° to 10° to Right

      Left Turn

      (Vehicle speed: 30 km/h [19 mph] or higher)

      		 0° to 15° to Left 0° to 7.5° to Left
      Swivel Angle Range (for RHD)
      Driving Condition Headlight Unit
      Left Right

      Right Turn

      (Vehicle speed: 10 to 30 km/h [6 to 19 mph])

      		 0° 0° to 15° to Right

      Left Turn

      (Vehicle speed: 10 to 30 km/h [6 to 19 mph])

      		 0° to 10° to Left 0°

      Right Turn

      (Vehicle speed: 30 km/h [19 mph] or higher)

      		 0° to 7.5° to Right 0° to 15° to Right

      Left Turn

      (Vehicle speed: 30 km/h [19 mph] or higher)

      		 0° to 10° to Left 0° to 5° to Left

    2. Function of Main Components

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

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

      • A step motor is used for the headlight swivel motor. The headlight swivel ECU assembly determines the low beam angle based on the number of steps (position) of the step motor.
      Spiral with Sensor Cable Sub-assembly Detects the steering angle and direction and outputs this signal to the headlight swivel ECU assembly.
      Headlight Swivel Main Switch AFS can be turned on or off by operating the steering pad switch.
      Brake Actuator Assembly (Skid Control ECU) Transmits the speed sensor signal (front LH and RH) to the headlight swivel ECU assembly.
      ECM

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

      • Transmits the shift position signal to the headlight swivel ECU. The headlight swivel ECU determines whether the vehicle is moving forward or in reverse from this signal.
      Main Body ECU (Instrument Panel Junction Block Assembly) Transmits the low beam headlight status signal.
      Combination Meter Assembly Multi-information Display Warning

      • When the system malfunctions, the meter flashes the AFS OFF indicator light based on the signal from the headlight swivel ECU assembly to alert the driver.

      • When the headlight swivel main switch is pushed, the headlight swivel ECU assembly illuminates the AFS OFF indicator light to inform the driver that the system does not operate.

    3. The headlight swivel ECU assembly performs intelligent AFS control when all the following conditions are met:


      • Shift lever is not in R or N.

      • Engine is running.

      • Vehicle speed* is 10 km/h (6 mph) or more.

      • Steering angle* is 7.5° or more.

      • Low beam headlights are on.

      • AFS (Adaptive front-light system) is on.

        *: The swivel angle changes in accordance with the vehicle speed and steering angle.

    4. Initial Set Control

      When the engine is started, the headlight swivel ECU assembly drives the headlight swivel motor, moving the headlight as much as possible toward the vehicle center and returning it to the proper position. The headlight swivel ECU assembly thus assesses the position of the headlight for reference control.

    5. Fail-safe

      If the headlight swivel ECU assembly detects a malfunction in the intelligent AFS, the headlight swivel ECU assembly performs fail-safe control. At the same time, the combination meter flashes the AFS OFF indicator light in order to inform the driver of the problem.

  8. LANE CHANGE FLASHER SYSTEM


    • When moving the turn signal switch to the lane change position (it is not necessary to hold the switch) during a lane change, the turn signal light flashes a specified number of times.

    • While the turn signal light is flashing after the turn signal switch is moved to the lane change position (it is not necessary to hold the switch), the turn signal light turns off if the turn signal switch is moved in the opposite direction.

    • The combination meter controls this system.

  9. EMERGENCY BRAKE SIGNAL

    During emergency braking, the emergency brake signal flashes the hazard warning lights to alert other drivers and reduce the possibility of a rear-end collision.

  10. FRONT CORNERING LIGHT SIGNAL (w/ Cornering Light)

    The front fog light LH and RH are independently illuminated according to the front fog light output request from the headlight swivel ECU.