BACK DOOR CLOSER SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Multiplex Network Door ECU Controls the back door closer system in accordance with the signals received from the switches, sensors and ECUs.
    Back Door Lock Assembly Back Door Closer Motor When the back door becomes ajar, this motor operates to automatically fully close the back door.
    Sector Switch This switch detects the neutral position (initial position) of the back door closer motor and sector gear and outputs it to the multiplex network door ECU.
    Pawl Switch This switch detects that the latch is opened and then closed and outputs a signal to the multiplex network door ECU.
    Half Latch Switch This switch detects the ajar position of the latch and the fully closed position of the latch due to the closer operation and outputs a signal to the multiplex network door ECU.
    Latch Courtesy Switch This switch detects that the latch is fully closed and outputs a signal to the multiplex network door ECU.
    Certification ECU (Smart Key ECU Assembly) Sends a back door opener switch assembly operation signal to the multiplex network door ECU.
    Back Door Opener Switch Assembly

    • The back door can be opened by pressing this switch when the back door is fully closed.

    • The switch operation signal is output to the certification ECU (smart key ECU assembly).
    Body ECU Receives the back door opener switch information and sends a signal about the door lock state to the certification ECU (smart key ECU).

  2. FUNCTION


    1. Close Operation

      B002NNAE02
      Timing Chart
      [T] Component Operation Outline
      Back door condition changes from open to ajar.
      (a) Half Latch Switch Changes from on to off The door is detected to be ajar.
      Back Door Closer Motor Changes from off to normal rotation When an ajar condition is detected, the normal rotation relay turns on and a normal rotation operation starts.
      (b) Sector Switch Changes from on to off The back door closer motor and sector gear initial position detection is turned off.
      (c) Pawl Switch Changes from on to off The half-latch condition is detected.
      (d) Latch Courtesy Switch Changes from on to off The door is detected to be fully closed.
      (e) Pawl Switch Changes from on to off The full-latch condition is detected.
      Back Door Closer Motor Changes from normal rotation to off When the full-latch condition is detected, the normal rotation relay turns off and the normal rotation operation stops.
      (f) Back Door Closer Motor Changes from off to reverse rotation Approximately 0.1 seconds after the back door closer motor is detected to be off, the reverse rotation relay turns on and a reverse rotation operation starts in order to return the back door closer motor and sector gear to the initial position.
      (g) Sector Switch Changes from off to on The back door closer motor and sector gear initial position is detected.
      Back Door Closer Motor Changes from reverse rotation to off When the sector switch is detected to be on, the reverse rotation relay turns off and the reverse rotation operation stops.

      1. Release request during back door close operation (on signal input from back door opener switch assembly)


        • If an on signal is input from the back door opener switch assembly during a close operation, the multiplex network door ECU stops the close operation and switches the back door close motor off to cease operation.

    2. Release Operation

      B002N2ZE02
      Timing Chart
      [T] Component Operation Outline
      Back door opener switch assembly is pressed with back door fully closed or ajar.
      (a) Back Door Opener Switch Assembly Changes from off to on User operation is detected.
      Back Door Closer Motor Changes from off to reverse rotation When the back door opener switch assembly is detected to be on, the reverse rotation relay turns on and a reverse rotation operation starts.
      (b) Sector Switch Changes from on to off The back door closer motor and sector gear initial position detection is turned off.
      (c) Latch Courtesy Switch Changes from on to off Fully closed detection is turned off.
      The user opens the back door.
      (d) Half Latch Switch Changes from on to off Ajar detection is turned off.
      Back Door Closer Motor Changes from reverse rotation to off When the half latch switch is detected to be on, the reverse rotation relay turns off and the reverse rotation operation stops.*1
      (e) Back Door Closer Motor Changes from off to normal rotation Approximately 0.1 seconds after the back door closer motor is detected to be off, the normal rotation relay turns on and a normal rotation operation starts in order to return the back door closer motor and sector gear to the initial position.*2
      (f) Sector Switch Changes from off to on The back door closer motor and sector gear initial position is detected.
      (g) Back Door Closer Motor Changes from normal rotation to off When the sector switch is detected to be on, the normal rotation relay turns off and the normal rotation operation stops.

      Tech Tips

      When a vehicle speed signal of approximately 3 km/h or higher is detected, release operations of the back door closer motor are prohibited.

      *1: In cases such as when the user has not opened the back door, the operation stops when the latch switch is off for 1 second or more.

      *2: In cases such as when the user has not opened the back door, the normal rotation operation is performed when approximately 3 seconds or more have elapsed after the operation stopped.