POWER BACK DOOR SYSTEM SYSTEM DESCRIPTION


  1. POWER BACK DOOR SYSTEM DESCRIPTION


    1. The power back door system controls the power back door by automatically opening and closing the power back door with the motor.


      1. The power back door system operates only when the necessary conditions are satisfied.

      2. The power back door ECU records the back door positions in the power back door ECU memory.

        If the battery, power back door fuse, power back door ECU or power back door drive unit are removed and then reinstalled, the power back door ECU loses the memory of the door positions.

        In such cases, initialization of the power back door system is necessary. Please refer to the initialization procedure specified in step [*1].

      3. "OPEN/CLOSE" request signals for the back door are input to the power back door ECU.

        Then, the power back door ECU controls the back door opening/closing operation by outputting commands to the back door lock and back door drive unit.

      4. The power back door system has various request signals: "OPEN/CLOSE" request signal from the transmitter switch*, "OPEN/CLOSE" request signal from the power back door opener/closer switch, "CLOSE" request signal from the power back door closer switch, and "OFF" request signal from the back door main switch.

        Tech Tips

        *: w/ Smart entry and start system

      5. The power back door system sets off an alarm (using a buzzer) and hazard warning lights when the power back door starts operating.

      6. The power back door system causes a warning buzzer to sound when the shift lever is moved to any position except P when the power back door starts operating or while the power back door is operating (the buzzer continues sounding).

      7. [*1] The power back door system turns OFF when the shift lever is moved to any position except P while the power back door is opening.

        The power back door continues to close when the shift lever is moved to any position except P while the power back door is closing.

      8. The power back door reverses the direction that the power back door is operating if any switch is pressed during operation.

      9. A pulse sensor and a touch sensor are used to prevent anything from being caught in the door while the power back door is closing (jam protection function).

      10. The power back door system stops motor operation and switches to the manual operation mode when the jam protection function is activated repeatedly more than the specified number of times.

      11. The power back door system slows the back door down when the back door approaches the fully opened position or fully closed position in order to reduce the impact against the vehicle body.

    2. Function of main components:

      Function Condition
      Back door buzzer

      • When pressing power back door opener/closer switch and transmitter switch*, warning buzzer sounds while switch is pressed

      • When power back door closer switch is pressed, warning buzzer sounds for 1 second

      • Warning buzzer sounds intermittently while power back door is operating

      • Sounds once for 0.1 sec. to notify that power back door will reverse moving direction after being triggered by switch operation or activation of jam protection function.

      • When back door handle switch is pressed while power back door is operating, warning buzzer sounds for 2 seconds
      Hazard lights Flashes twice to notify that power back door will start operating when a request is input from the switch while back door is fully closed/opened
      Power back door main switch

      • Power back door system does not operate when switch is in ON position

      • Power back door system operates when switch OFF
      Transmitter switch*

      • Pressing the switch causes power back door to open/close.

        Pressing it again during operation reverses the direction of movement.
      Power back door opener/closer switch Transmitter a power back door OPEN/CLOSE signal to power back door ECU via main body ECU
      Power back door closer switch Transmits a power back door CLOSE signal to power back door ECU

      Tech Tips

      *: w/ Smart entry and start system