LIGHTING SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    AFS ECU (Headlight Swivel ECU Assembly) The AFS ECU receives various signals, calculates the target lighting angle, and actuates the headlight swivel motor.
    Headlight Unit Headlight Swivel Motor

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

    • A step motor is used for the headlight swivel motor. The AFS ECU determines the low beam angle based on the number of steps (position) of the step motor.
    Steering Angle Sensor Detects the steering angle and direction and outputs this signal to the AFS ECU.
    Skid Control ECU Transmits the front speed sensor signal to the AFS ECU.
    ECM Transmits the engine running status signal to the AFS ECU.
    Main Body ECU Transmits the headlight status signal.
    Combination Meter Assembly Multi-information Display Operation/non-operation of the intelligent AFS can be selected on the multi-information display. Settings are changed by operating the multi-information switch.
    AFS Off Indicator Light

    • If the system malfunctions, the meter ECU blinks the AFS off indicator light based on the signal from the AFS ECU to alert the driver.

    • When non-operation of the intelligent AFS is selected, the AFS ECU illuminates the AFS off indicator light to inform the driver that the system is not operating.
    Multi-information Switch (Steering Pad Switch Assembly) Menu Switch The menu switch is pressed to change the multi-information display to the multi-function switch display.
    ENTER Switch Intelligent AFS can be switched on or off using the ENTER switch.

  2. SYSTEM CONTROL


    1. The AFS ECU calculates the swivel angle from the steering angle and drives the headlight swivel motor on the side facing into the turn to illuminate the road ahead during cornering.

      Driving Condition Headlight Unit
      Left Right
      Right Turn 0° Fixed 0° to 10° to Right
      Left Turn 0° to 15° to Left 0° Fixed

    2. Initial Set Control


      1. When the engine is started, the AFS ECU drives the headlight swivel motor, moves the projector headlight to the operation limit in the direction toward the vehicle center and then returns it to the proper position. The AFS ECU ths assesses the position of the headlight for reference control.

    3. Operating Condition


      1. The AFS ECU performs when all the following conditions are fulfilled:

        Condition Engine is running.
        Vehicle is moving forward at a speed of 10 km/h (6 mph) or more.
        Steering angle is 6° or more.
        Headlight is operating in low beam (except when the daytime running light system is operating).
        AFS is on.

  3. FAIL-SAFE


    1. If the AFS ECU detects a malfunction in the intelligent AFS or automatic headlight beam level control system, it will take the actions indicated in the table below:

      Trouble Area Condition (Fail-safe Control for Intelligent AFS) AFS Off Indicator Light
      Headlight Swivel Motor Malfunction

      Normal Side Headlight Swivel Motor:


      • Stops operating after returning to the initial position.

      		 Blinks

      Abnormal Side Headlight Swivel Motor:


      • Stops in its current position.

      		 Blinks
      Steering Angle Sensor Signal Malfunction Stops operating after returning to the initial position. Blinks
      Speed Sensor Signal Malfunction Stops operating after returning to the initial position. Blinks
      Height Control Sensor Signal Malfunction Stops operating after returning to the initial position. Blinks
      Headlight Leveling Motor Malfunction Stops operating after returning to the initial position. Blinks
      Communication Signal Malfunction

      Main Body ECU:


      • Stops operating after returning to the initial position.

      		 Blinks

      ECM:


      • Stops operating after returning to the initial position.

      		 Blinks

      Skid Control ECU:


      • Stops operating after returning to the initial position.

      		 Blinks

      Steering Angle Sensor:


      • Stops operating after returning to the initial position.

      		 Blinks

  4. DIAGNOSIS


    1. If the AFS ECU detects a malfunction in the intelligent AFS, the AFS ECU blinks the AFS off indicator light in order to alert the driver. At the same time, the DTCs are stored in the memory. The DTCs can be read by using the intelligent tester II. For details, refer to the corresponding Repair Manual for this model.