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Power Back Door System: Pre-Check

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. DIAGNOSIS SYSTEM 
    1. Inspect the DLC3.

    HINT:

    The vehicle's ECM uses ISO 9141-2 for communication.

    The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.

    Fig 1: Inspecting DLC3
    G02607680Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DLC3 SPECIFIED CONDITION

    Terminal No. Condition Specified Condition
    7 (Bus + line) - 5 (Signal ground) During communication Pulse generation
    4 (Chassis ground) - Body ground Constant Below 1 Ω
    5 (Signal ground) - Body ground Constant Below 1 Ω
    16 (B+) - Body ground Constant 9 to 14 V

    HINT:

    If the screen displays UNABLE TO CONNECT TO VEHICLE after you have connected the cable of the hand-held tester to the DLC3, turned the ignition switch ON and used the hand-held tester, there is a problem on the vehicle side or tester side.

    • If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
    • If communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself, so consult the Service Department listed in the tester's instruction manual.
  2. CHECK DTC (USING HAND-HELD TESTER) 
    1. Checking DTCs.
      1. Connect the hand-held tester to the DLC3.
        Fig 2: Connecting Hand-Held Tester To DLC3
        G02607681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Turn the ignition switch ON.
      3. Read DTCs by following the prompts on the tester screen.

    HINT:

    Refer to the hand-held tester operator's manual for further details.

  3. CLEAR DTC (USING HAND-HELD TESTER) 
    1. Clearing the DTCs from memory.
      1. Connect the hand-held tester to the DLC
      2. Turn the ignition switch ON.
      3. Erase the DTCs following the prompts on the tester screen.

    HINT:

    Refer to the hand-held tester operator's manual for further details.

  4. DATA LIST 

    HINT:

    Using the DATA LIST displayed by the hand-held tester, you can read the value of the switch, sensor, actuator, etc. without parts removal. Reading the DATA LIST as the first step of troubleshooting is one way to shorten the labor time.

    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON.
    3. Read the DATA LIST according to the display on the tester.

      Standard (Power back door ECU): 

    DATA LIST

    Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
    HALF LATCH SW Back door lock half-latch switch signal /ON or OFF ON: Back door is not completely closed
    OFF: Back door is closed    		 -
    FULL LATCH SW Back door lock full-latch switch signal /ON or OFF ON: Back door is open
    OFF: Back door is closed    		 -
    DOOR HANDLE SW Back door opener switch signal /ON or OFF ON: Back door opener switch is pushed
    OFF: Back door opener switch is not pushed    		 -
    LOCK STATUS Back door position switch signal /UNLOCK or LOCK UNLOCK: Back door is unlocked
    LOCK: Back door is locked    		 -
    DOOR POS-1/4 Back door position (Full close - 1/4 open) /CAUTION or OK CAUTION: Back door position is not full closed - 1/4 opened
    OK: Back door position is full closed - 1/4 opened    		 (1)
    DOOR POS-2/4 Back door position (1/4 open - 2/4 open) /CAUTION or OK CAUTION: Back door position is not 1/4 opened - 2/4 opened
    OK: Back door position is 1/4 opened - 2/4 opened    		 (1)
    DOOR POS-3/4 Back door position (2/4 open - 3/4 open) /CAUTION or OK CAUTION: Back door position is not 2/4 opened - 3/4 opened
    OK: Back door position is 2/4 opened - 3/4 opened    		 (1)
    DOOR POS-OPEN Back door position (3/4 open - full open) /CAUTION or OK CAUTION: Back door position is not 3/4 opened - full opened
    OK: Back door position is 3/4 opened - full opened    		 (1)
    PBD SW OPEN Power back door switch operation (Satellite switch) /0.8s or 0.0s*2 0.8s: Satellite switch 0.8 sec.-press (long press) operates power back door
    0.0s*2 : Satellite switch 1-press operates power back door    		 -
    PBD BUZZ VOL Warning buzzer volume during power back operation /OFF, SMALL or LARGE OFF: Warning buzzer that indicates power back door is operating does not sound
    SMALL: Warning buzzer that indicates power back door is operating sounds at small volume
    LARGE: Warning buzzer that indicates power back door is operating sounds at large volume    		 -
    WIRELS PBD OPER Wireless power back door switch operation (Transmitter switch operation) /1TIME, 2TIMES, 0.8sPR or OFF 1TIME: Transmitter switch 1-press operates power back door
    2TIMES: Transmitter switch 2-presses operates power back door
    0.8sPR: Transmitter switch 0.8s.-press operates power back door
    OFF: Transmitter switch operation is disabled    		 -
    PBD ASSIST CLS Power back door assist-close operation /ON or OFF ON: Back door is assist-closing
    OFF: Back door is opened or closed    		 -
    PBD ASSIST OPN Power back door assist-open operation /ON or OFF ON: Back door is assist-opening
    OFF: Back door is opened or closed    		 -
    PBD TOUCH SEN R Power back door touch sensor RH signal /OFF, ON or OPEN OFF: Power back door touch sensor RH is free
    ON: Power back door touch sensor RH is pressed
    OPEN: Power back door touch sensor RH is opened    		 -
    PBD TOUCH SEN L Power back door touch sensor LH signal /OFF, ON or OPEN OFF: Power back door touch sensor LH is free
    ON: Power back door touch sensor LH is pressed
    OPEN: Power back door touch sensor LH is opened    		 -
    PBD MAIN SW Power back door main switch signal /ON or OFF ON: Orange paint on the top of the switch appears
    OFF: Orange paint on the top of the switch does not appear    		 -
    (1) In case that the "CAUTION" is displayed even without applying resistance in each range, there must be a foreign object caught in that range.
    (2) "0.0s" appearing on the display of the hand-held tester means that a 1-press of the satellite switch operates the power back door.
  5. ACTIVE TEST 

    HINT:

    Performing the ACTIVE TEST using the hand-held tester allows you to operate the relay, VSV, actuator, etc. without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one way to shorten the labor time. It is possible to display the DATA LIST during the ACTIVE TEST.

    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON.
    3. Perform the ACTIVE TEST according to the display on the tester.

      Standard (Back door ECU): 

    ACTIVE TEST

    Item Test Details Diagnostic Note
    LATCH RELEASE Back door lock latch is release OFF/ON -
    PBD MOTOR Power back door motor is operate OFF/FORWARD/REVERSE Clutch is OFF while power back door motor is operating
    PBD CLUTCH Power back door clutch is operate OFF/ON Power back door motor is OFF when clutch is ON
    PBD BUZZER Power back door buzzer is sound OFF/ON -
  6. BACK DOOR LOCK 
    1. When the battery is reconnected:

      The back door is locked and therefore cannot be opened. Therefore, it is necessary to unlock the back door using the door control switch or transmitter switch.

  7. RESET 
    1. When the back door lock is replaced:

      The power back door ECU cannot receive a switch signal from the lock. This may cause the power back door system to enter fail-safe mode and DTC B2215 to set, and also make the system disabled. When the lock is replaced, be sure to perform the following: first properly connect the lock, second clear the DTC using the hand-held tester and finally recheck that no DTC is output.

    2. Reset the power back door system:

      The power back door ECU records the fully open position and the fully closed position of the power back door in its memory and the power back door fully opens and fully closed based on this memory. The power back door cannot operate without this memory. In the case where the battery has been removed, manually close the back door fully to reset the power back door system. However, if the battery is removed/installed when the back door is fully open, the power back door operates normally, thus the resetting the system is unnecessary.

      Replacing drive unit will also cause the memory of the door positions to be last. Therefore, in such a case resetting the system is necessary.

      Reset the power back door system as follows:

      1. Fully close the power back door if opened.
      2. Check that the back door fully open and fully close.
        • Unlock the power back door using the transmitter switch or the door control switch.
        • Turn the ignition switch to the "OFF" position.
        • Check that the power back door main switch is in the "ON" position.
        • Check that the back door fully open and fully close by pushing the power back door satellite switch or PBD button briefly.

    HINT:

    The jam protection function is enabled through the above initialization procedure.

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