POWER BACK DOOR SYSTEM


  1. FUNCTION OF MAIN COMPONENTS


    1. The main components of the power back door system have the following functions:

      Component Function
      Power Back Door Unit Assembly Set Motor Opens and closes the back door when actuated by the power back door ECU.
      Hall IC Detects the operation conditions of the back door and outputs a pulse signal to the power back door ECU.
      Power Back Door ECU (Multiplex Network Door ECU)

      • Controls the power back door system in accordance with the signals received from the switches, sensors and ECUs.

      • Receives the signals from the Hall IC to detect the back door position and the opening and closing speed of the back door.

      • Informs the user by sounding the buzzer and flashing the hazard warning light* when each operation switch is pressed.
      Back Door Lock Assembly Back Door Lock Motor Latches and unlatches the back door when actuated by the power back door ECU.
      Half-latch Switch Detects if the back door is ajar.
      Position Switch Detects the initial (neutral) position of the driven gear of the back door lock motor. This switch turns on when the driven gear is in the neutral position and turns off when the driven gear is in any position other than neutral.
      Courtesy Switch Detects whether the back door is open or closed. This switch turns on when the back door is open or ajar and turns off when the back door is closed.
      Back Door Control Switch The power back door closes when the back door control switch (on the back door jamb) is turned on.
      Back Door Opener Switch Assembly The back door opens when the back door opener switch assembly on the outside of the vehicle is turned on.

      Combination Switch Assembly


      • Power Back Door Switch

      		 The back door opens and closes when the power back door switch is turned on.
      Touch Sensor (Power Back Door Sensor Assembly) Detects if an object is jammed in the back door during the closing operation of the back door.
      Back Door Buzzer and Wireless Door Lock Buzzer When the power back door system starts to operate, the back door buzzer and wireless door lock buzzer sound to inform the user that the system is operating.
      Combination Meter Assembly Receives a signal to blink the hazard warning light.
      Smart Door Control Receiver Assembly Receives the power back door button signal and transmits it to the certification ECU.
      Main Body ECU (Multiplex Network Body ECU) Transmits a back door lock/unlock control signal, vehicle speed signal and shift position P signal to the power back door ECU via the Controller Area Network (CAN).

      Electrical Key Transmitter Sub-assembly


      • Power Back Door Button

      		 Transmits the power back door button signal to the smart door control receiver assembly.
      Radio Receiver Assembly Displays the vehicle customization screen on the multi-display assembly.

      *: Except models for Europe and destination package for Malaysia

  2. SYSTEM CONTROL


    1. The power back door system has the following functions:

      Function Outline
      Opener Function Upon receiving an on signal from the power back door switch or the back door opener switch assembly with the back door unlocked, the power back door ECU actuates the back door closer motor and the power back door unit assembly set in order to release the latch of the back door and open the back door.
      Closer Function Upon receiving an on signal from the power back door switch and the back door control switch with the back door open or the power back door button, the power back door ECU actuates the power back door unit assembly set and the back door closer motor in order to close the back door and engage the latch of the back door lock.
      Jam Protection Function Upon receiving signals from a touch sensor or the Hall ICs of the power back door unit assembly set, when the power back door ECU detects that an object is jammed in the back door, the door operation is stopped after moving back a certain distance upward during the closing operation and suspended during the opening operation. The power back door buzzer sounds twice when a jammed object is detected.
      Back Door Open/Close Speed Control Function In accordance with the signals received from the Hall ICs, the power back door ECU performs control so that the opening and closing speeds of the back door are equal.
      Suspending Control Function

      By conducting any of the following operations during the opening or closing operation of the power back door, the operation will be canceled:


      • The power back door off switch is turned off.

      • The power back door button on the electrical key transmitter sub-assembly is pressed.

      • The power back door switch is pressed.

      • The back door opener switch assembly is pressed.

      • The back door control switch is pressed.
      Memory Function

      • By pressing the power back door switch for 2 seconds while holding the back door at the desired opening angle by hand, the power back door buzzer sounds 4 times as an answer back and the power back door ECU memorizes the angle. From the next time the back door is opened, the back door will stop at the set angle.

      • By pressing the power back door switch for 7 seconds after the set angle is memorized, the memorized position is initialized.
      Assist Function When the back door is stopped and then manually operated in the closing direction, the power back door ECU drives the power back door unit assembly set to operate the back door until it is fully closed.
      Customization Function This function can be used to set the back door opening angle at 5 different positions via the multi-display assembly vehicle customization screen.
      Switch Operation Function

      When each operation switch is operated, the following operations are performed in accordance with the back door condition:


      • When the power back door switch or the power back door button on the electrical key transmitter sub-assembly is pressed, opening the operation is performed when the back door is closed and the closing operation is performed when the back door is open.

      • When the back door opener switch assembly is pressed, the opening operation of the back door is performed.

      • When the back door control switch assembly is pressed, the closing operation of the back door is performed.
      Wireless One Motion Function*

      • When the power back door button is pressed with the back door locked, the back door is unlocked and opened.

      • Although this function is disabled by default, the function can be set via the customization function.

      Tech Tips

      *: Models with wireless one motion function

      If the power supply is stopped such as when the battery terminals are removed, initialization is required. The back door should be fully closed with power being supplied for initialization.

    2. Opener Function 1


      1. When the power back door switch or the power back door button of the electrical key transmitter sub-assembly is operated, the opener function operates as follows:

        1 After the power back door switch or the power back door button of the electrical key transmitter sub-assembly is pressed for approximately 0.8 seconds, the power back door buzzer sounds for 0.8 seconds and the hazard warning light blinks twice*.
        2 The back door lock assembly (back door closer motor) releases the latch.
        3 The back door courtesy switch is turned on and the motor in the power back door unit assembly set starts to operate.
        4 The back door lock motor is returned to the initial position and the half-latch switch is turned on.
        5 After the power back door ECU detects a back door stop position pulse, the motor in the power back door unit assembly set is stopped.

        • *: Except models for Europe and destination package for Malaysia

        B002FDTE03

    3. Opener Function 2


      1. When the back door opener switch assembly is operated, the opener function operates as follows:

        1 When the back door opener switch assembly is pressed, the back door buzzer sounds for 0.8 seconds and the hazard warning light blinks twice*.
        2 After the power back door buzzer sounds, the back door lock assembly (back door closer motor) releases the latch.
        3 When the back door opener switch assembly is not input again before the latch begins to be released, the motor in the power back door unit assembly set starts to operate when the back door courtesy switch is turned on.
        4 The back door lock motor is returned to the initial position and the half-latch switch is turned on.
        5 After the power back door ECU detects a back door stop position pulse, the motor in the power back door unit assembly set is stopped.

        • *: Except models for Europe and destination package for Malaysia

        A01GG81E01

    4. Opener Function 3


      1. When the power back door switch or power back door button of the electrical key transmitter sub-assembly is operated, the opener function operates as follows:

        1 When the power back door switch or power back door button of the electrical key transmitter sub-assembly is pressed while the back door is closing, the power back door buzzer sounds for approximately 0.2 seconds and the back door stops.
        2 When the power back door switch or power back door button of the electrical key transmitter sub-assembly is pressed for approxmately 0.8 seconds again, the power back door buzzer sounds for approximately 0.8 seconds and the hazard warning lights flashes 2 times*.
        3 The motor in the power back door unit assembly set begins to operate.
        4 The power back door ECU detects a back door stop position pulse and the motor in the power back door unit assembly set stops.

        • *: Except models for Europe and destination package for Malaysia

        A01GH3LE01

    5. Closer Function 1


      1. When the power back door switch or the power back door button of the electrical key transmitter sub-assembly is operated, the closer function operates as follows:

        1 After the power back door switch or the power back door button of the electrical key transmitter sub-assembly is pressed for approximately 0.8 seconds, the power back door buzzer sounds for 0.8 seconds and the hazard warning light blinks twice*.
        2 The motor in the power back door unit assembly set begins to operate.
        3 When the half-latch switch is turned off, the voltage of the motor is reduced.
        4 The back door lock assembly (back door closer motor) performs the closing operation 1.0 second after the half-latch switch is turned off, and stops the operation when the back door courtesy switch is turned off.

        • *: Except models for Europe and destination package for Malaysia

        A01GGHPE01

    6. Closer Function 2


      1. When the back door control switch is operated, the closer function operates as follows:

        1 When the back door control switch is turned on, the power back door buzzer sounds for 0.8 seconds and the hazard warning light blinks twice*.
        2 The motor in the power back door unit assembly starts to operate.
        3 When the half-latch switch is turned off, the voltage of the motor is reduced.
        4 The back door lock assembly (back door closer motor) performs the closing operation 1.0 second after the half-latch switch is turned off, and stops the operation when the back door courtesy switch is turned off.

        • *: Except models for Europe and destination package for Malaysia

        A01GGMYE01