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*1 when each operation switch is pressed.
      Back Door Lock Assembly Back Door Closer Motor Latches and unlatches the back door when actuated by the power back door ECU.
      Sector Switch Detects the neutral position (initial position) of the back door closer motor and sector gear and outputs it to the power back door ECU.
      Pawl Switch Detects that the latch is opened and then closed and outputs a signal to the power back door ECU.
      Latch Switch Detects the ajar position of the latch and the fully closed position of the latch due to the closer operation (the latch is within the overstroke range after fully closing), and outputs it to the power back door ECU.
      Courtesy Switch Detects the fully closed position of the latch and outputs it to the power back door ECU.
      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.

      Combination Switch Assembly


      • Power Back Door Switch

      		 The back door opens and closes when the power back door switch is turned on.
      Back Door Control Switch The power back door closes when the back door control switch on the back door jamb is turned on.
      Power Back Door Close and Lock Switch (Door Control Switch) The power back door closes and locks when the power back door close and lock 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.

      Electrical Key Transmitter Sub-assembly


      • Power Back Door Button

      		 Transmits the power back door button signal to the electrical key and TPMS receiver assembly.
      Kick Door Control Sensor*2

      • Detects touchless kick actuation operations.

      • The back door opens and closes when the touchless kick actuation operation is detected.
      Power Back Door Warning 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.*1
      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).
      Radio Receiver Assembly Displays the vehicle customization screen on the multi-display assembly.

      *1: Models with hazard warning light answer back function

      *2: Models with hands free power back door

  2. FUNCTION


    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, back door opener switch assembly or power back door button with the back door closed and unlocked, the power back door ECU actuates the back door closer motor to release the latch of the back door, and then actuates the motor in the power back door unit assembly set to open the back door.

      • Upon receiving an on signal from the power back door switch, back door control switch, back door opener switch assembly or power back door button after the closing operation is suspended, the power back door ECU actuates the motor in the power back door unit assembly set to open the back door.
      Closer Function Upon receiving an on signal from the power back door switch, back door control switch or power back door button with the back door open or after the opening operation is suspended, the power back door ECU actuates the motor in the power back door unit assembly set to close the back door, and then actuates the back door closer motor to engage the latch of the back door.
      Close and Lock Function Upon receiving an on signal from the power back door close and lock switch with the back door open or after the opening operation is suspended, the power back door ECU actuates the motor in the power back door unit assembly set to close the back door, and then actuates the back door closer motor to engage the latch of the back door. Afterwords, all of the doors lock.
      Hands Free Power Back Door Function*

      • When the kick door control sensor detects a touchless kick actuation operation with the door locked, the door is unlocked and the back door is opened.

      • When the kick door control sensor detects a touchless kick actuation, an opening operation is performed if the back door is closed (or was suspended during a closing operation) and a closing operation is performed if the back door is open (or was suspended during an opening operation).
      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 warning 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 on the multi-information display is turned off.

      • The power back door button is pressed.

      • The power back door switch is pressed.

      • The back door opener switch assembly is pressed.

      • The back door control switch is pressed.

      • The power back door close and lock switch is pressed.

      • The touchless kick actuation operation is performed.*
      Memory Function

      • By pressing the back door control switch for 2 seconds while holding the back door at the desired opening angle by hand, the power back door warning 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 motor in 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 power back door button is pressed for approximately 0.8 seconds, an opening operation is performed if the back door is closed (or was suspended during a closing operation), and a closing operation is performed if the back door is open (or was suspended during an opening operation).

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

      • When the back door control switch is pressed and then released, a closing operation is performed if the back door is open (or was suspended during an opening operation), and an opening operation is performed if the back door was stopped during a closing operation.
      Hands Free Operation Function* When the kick door control sensor is detected a touchless kick actuation operation, an opening operation is performed if the back door is closed (or was suspended during a closing operation), and a closing operation is performed if the back door is open (or was suspended during an opening operation).

      *: Models with hands free power back door

      Tech Tips

      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.

  3. SYSTEM CONTROL


    1. Opener Function


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

        1 After the power back door switch or the power back door button is pressed for approximately 0.8 seconds, the power back door warning buzzer sounds for 0.8 seconds and the hazard warning light blinks twice*.
        2 The 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 closer motor is returned to the initial position and the 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.

        *: Models with hazard warning light answer back function

        B002GXRE06

      2. 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 power back door warning buzzer sounds for 0.8 seconds and the hazard warning light blinks twice*.
        2 After the power back door warning buzzer sounds, the 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 closer motor is returned to the initial position and the 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.

        *: Models with hazard warning light answer back function

        B002GFVE04

      3. When the power back door switch or power back door button is operated, the opener function operates as follows:

        1 When the power back door switch or power back door button is pressed while the back door is closing, the power back door warning buzzer sounds for approximately 0.2 seconds and the back door stops.
        2 When the power back door switch or power back door button is pressed for approximately 0.8 seconds again, the power back door warning 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.

        *: Models with hazard warning light answer back function

        B002GP1E07

    2. Closer Function


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

        1 After the power back door switch or the power back door button is pressed for approximately 0.8 seconds, the power back door warning 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 latch switch is turned off, the voltage of the motor in the power back door unit assembly set is reduced.
        4 The back door closer motor performs the closing operation 1.0 second after the latch switch is turned off, and stops the operation when the back door courtesy switch is turned off.

        *: Models with hazard warning light answer back function

        B002GSKE04

      2. 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 warning 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 latch switch is turned off, the voltage of the motor in the power back door unit assembly set is reduced.
        4 The back door closer motor performs the closing operation 1.0 second after the latch switch is turned off, and stops the operation when the back door courtesy switch is turned off.

        *: Models with hazard warning light answer back function

        B002GZNE07

    3. Close and Lock Function


      1. When the power back door close and lock switch is operated, the close and lock function operates as follows:

        1 When the power back door close and lock switch is turned on, the power back door warning buzzer sounds for approximately 1.0 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 latch switch is turned off, the voltage of the motor in the power back door unit assembly set is reduced.
        4 The back door closer motor performs the closing operation 1.0 second after the latch switch is turned off, and stops the operation when the back door courtesy switch is turned off.
        5 The doors have been locked and the hazard warning light blinks once*.

        *: Models with hazard warning light answer back function

        B002GO3E02

    4. Hands Free Power Back Door Function (Models with Hands Free Power Back Door)


      1. When the performing a touchless kick actuation operation with the back door closed, an opening operation starts as follows:

        1 When the kick door control sensor is detected a touchless kick actuation operation with the back door closed, the power back door warning buzzer sounds for 0.8 seconds and the hazard warning light blinks twice*.
        2 The 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 begins to operate.
        4 The back door closer motor is returned to the initial position and the 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.

        *: Models with hazard warning light answer back function

        B002GTOE02

      2. When the performing a touchless kick actuation operation with the back door open, a closing operation starts as follows:

        1 When the kick door control sensor is detected a touchless kick actuation operation with the back door opened, the power back door warning 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 latch switch is turned off, the voltage of the motor in the power back door unit assembly set is reduced.
        4 The back door closer motor performs the closing operation 1.0 second after the latch switch is turned off, and stops the operation when the back door courtesy switch is turned off.

        *: Models with hazard warning light answer back function

        B002GIYE02