POWER BACK DOOR SYSTEM


  1. POWER BACk DOOR UNIT ASSEMBLY


    1. Rotation of the power back door motor moves the arm forward and back via the gears, link mechanism and slider mechanism. The back door is opened and closed by movement of this arm.

      A01W7XJC01
      *1 Power Back Door Unit Assembly *2 Arm

  2. TOUCH SENSOR (POWER BACK DOOR SENSOR ASSEMBLY)


    1. The touch sensor is composed of conductive rubber and core wires. When the conductive rubber is compressed, its resistance decreases and current flows through the core wires. As a result, the power back door ECU receives a signal and detects a jam in the back door.

      A01W7NWC01
      *1 Touch Sensor LH (Power Back Door Sensor Assembly LH) *2 Touch Sensor RH (Power Back Door Sensor Assembly RH)
      *3 Core Wire *4 Conductive Rubber
      *a A - A Cross Section *b Normal
      *c Jammed - -

  3. BACK DOOR WITH CLOSER LOCK ASSEMBLY


    1. Construction


      1. The back door lock with closer assembly consists of 4 position detection switches (sector switch, pawl switch, latch switch and courtesy switch), back door closer motor, sector gear, open lever, ratchet, latch lever and latch.

      2. The rotation of the back door closer motor is transmitted to the open lever or latch lever via the sector gear. The open lever operates the ratchet to release the striker and the latch lever operates the latch to engage the striker.

      3. When this system does not operate due to a discharged auxiliary battery or other malfunctions, the back door can be opened by directly operating the open lever in the back door lock with closer assembly.

        A01W7EJC01
        *1 Open Lever *2 Pawl Switch
        *3 Ratchet *4 Latch
        *5 Courtesy Switch *6 Latch Switch
        *7 Latch Lever *8 Back Door Lock Motor
        *9 Sector Gear *10 Sector Switch
        Function of Components
        Component Function
        Back Door Closer Motor Rotates the sector gear when actuated by the power back door ECU.
        Sector Switch Detects the initial position of the sector gear and back door closer motor and outputs a signal to the power back door ECU.
        Pawl Switch Detects whether the ratchet condition is released or engaged and outputs a signal to the power back door ECU.
        Latch Switch Detects whether the back door is open or ajar (half-latch) and outputs a signal to the power back door ECU.
        Courtesy Switch Detects whether the back door is ajar (half-latch) or fully closed (full-latch) and outputs a signal to the power back door ECU.

        1. Sector Switch

          The sector switch turns on when the sector gear and back door closer motor are in the initial position and turns off when the back door closer motor is operated.

          A01W7UHC01
          *1 Sector Gear *2 Sector Switch
          *a Initial Position *b When Back Door Lock Motor Operated
          *c On *d Off

        2. Pawl Switch

          The pawl switch turns on when the ratchet condition is released and turns off when the ratchet condition is engaged.

          A01W7L7C01
          *1 Ratchet *2 Pawl Switch
          *a Released Condition *b Engaged Condition
          *c On *d Off

        3. Latch Switch and Courtesy Switch


          • The latch switch and courtesy switch turn on when the back door is open.

          • The latch switch turns off and the courtesy switch turns on when the back door is ajar (half-latch).

          • The latch switch and courtesy switch turn off when the back door is fully closed (full-latch).

            A01W7WLC01
            *1 Latch *2 Courtesy Switch
            *3 Latch Switch - -
            *a Open Position *b Half-latch Position
            *c Full-latch Position *d On
            *e Off - -

    2. Operation


      1. Release Operation


        • The back door closer motor rotates in the release direction with each gear in the initial position, transmitting rotation to the pinion.

        • The pinion operates the sector gear, open lever and ratchet, in that order.

        • The open lever operates to release the latch via the ratchet, releasing the striker.

          A01W7NNC01
          *1 Open Lever *2 Ratchet
          *3 Latch *4 Sector Gear
          *5 Back Door Closer Motor *6 Pinion
          *a Half-latch Position *b Release Operation
          *c Rotation Operation in Release Direction - -

        • After the release operation completes, the back door closer motor performs a reverse rotation operation to return each gear to the initial position.

          A01W7Y8C01
          *1 Open Lever *2 Ratchet
          *3 Latch *4 Sector Gear
          *5 Back Door Closer Motor *6 Pinion
          *a Open Position *b Initial Position
          *c Reverse Rotation Operation - -

      2. Fully Close Operation


        • When the back door becomes ajar, each built-in detection switch detects the ajar position and the back door closer motor performs an engagement operation to fully close the back door.

          A01W73YC02
          *1 Ratchet *2 Latch
          *3 Sector Gear *4 Back Door Closer Motor
          *a Half-latch Position *b Initial Position

        • The back door closer motor rotates in the engagement direction with each gear in the initial position, transmitting rotation to the pinion.

        • The sector gear is linked with the pinion and rotates in the engagement direction, and since the latch lever pin is held in place by the sector gear pin, the latch also rotates in the engagement direction. As a result, the striker is pulled in, fully closing the back door from the ajar position.

          A01W7YYC01
          *1 Latch Lever *2 Ratchet
          *3 Latch *4 Sector Gear
          *5 Back Door Closer Motor *6 Pinion
          *a Full-latch Position *b Engagement Operation
          *c Rotation Operation in Engagement Direction - -

        • After the fully close operation completes, the back door closer motor performs a reverse rotation operation to return each gear to the initial position.

          A01W7IVC01
          *1 Sector Gear *2 Back Door Closer Motor
          *3 Pinion - -
          *a Initial Position *b Reverse Rotation Operation