BACK DOOR CLOSER SYSTEM Back Door Closer does not Operate

DESCRIPTION

When the back door closer does not operate, one of the following may be the cause 1) improper fit of back door, or a foreign object is stuck in back door, or 2) initialization of the power back door ECU, or a malfunction in the 3) power back door ECU power source circuit, or 4) back door lock circuit, or 5) power back door ECU.

WIRING DIAGRAM

A017E34E03

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK BACK DOOR LOCK FUNCTION


    1. Check if the back door is fully closed by hand.


    NG

    IMPROPER FIT OF BACK DOOR, OR A FOREIGN OBJECT IS STUCK IN BACK DOOR

    OK

  2. INITIALIZE POWER BACK DOOR ECU


    1. Check that the power back door drive unit (power back door ECU) can be initialized Click here.


    NEXT

  3. CHECK BACK DOOR CLOSER SYSTEM


    1. Check that the back door closer system operation.

      OK
      Back door closer system operates normally.

    NG

    CHECK DTC OUTPUT Click here

    OK

    END

  4. CHECK DTC OUTPUT


    1. Check for the DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      B2250 is output B
      B2251 is output C

    B

    GO TO DTC CHART (B2250) Click here

    C

    GO TO DTC CHART (B2251) Click here

    A

  5. INSPECT FUSE (ECU IG NO. 1, ECU-B)


    1. Remove the ECU IG No. 1 fuse from the instrument panel junction block and ECU-B fuse from the engine room relay block.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      ECU IG NO. 1 Always Below 1 Ω
      ECU-B Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  6. CHECK FUSIBLE LINK BLOCK ASSEMBLY (PBD FUSE)


    1. Remove the fusible link block assembly.

    2. A017C5IE02

      Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      A - B Always Below 1 Ω

      Tech Tips

      PBD 30A fuse is located in the fusible link block assembly.


    NG

    REPLACE FUSIBLE LINK BLOCK ASSEMBLY

    OK

  7. CHECK HARNESS AND CONNECTOR (BODY GROUND)


    1. Disconnect the O14 power back door ECU connector.

    2. A017ENZE07

      Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Condition Specified Condition
      O14-8 (IG) - Body ground Ignition switch on (IG) 11 to 14 V
      O14-10 (ECUB) - Body ground Always 11 to 14 V
      O14-12 (B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    1. Disconnect the O14 power back door ECU connector.

    2. A017ENZE08

      Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      O14-11 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT BACK DOOR LOCK

    A017F60E07

    1. Remove the back door lock. Click here

    2. Apply battery voltage and check operation of the door lock motor.

      OK
      Measurement Condition Specified Condition

      Battery positive (+) → Terminal 1 (DC+)

      Battery negative (-) → Terminal 2 (DC-)

      		 Latch turns to full-latch position

      Battery positive (+) → Terminal 2 (DC-)

      Battery negative (-) → Terminal 1 (DC+)

      		 Latch turns to open-latch position

    3. Measure the resistance of the switch.

      Standard resistance
      Full-latch switch
      Tester Connection Door Lock Latch Position Specified Condition
      5 (HAF) - 4 (GND) Over-latch Below 1 Ω
      5 (HAF) - 4 (GND) Open-latch 10 kΩ or higher
      5 (HAF) - 4 (GND) Full-latch 10 kΩ or higher
      5 (HAF) - 4 (GND) Half-latch 10 kΩ or higher
      Back door courtesy light switch
      Tester Connection Door Lock Latch Position Specified Condition
      3 (BDCY) - 4 (GND) Open-latch Below 1 Ω
      3 (BDCY) - 4 (GND) Half-latch Below 1 Ω
      3 (BDCY) - 4 (GND) Full-latch 10 kΩ or higher
      3 (BDCY) - 4 (GND) Over-latch 10 kΩ or higher

    NG

    REPLACE BACK DOOR LOCK Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - POWER BACK DOOR ECU AND BODY GROUND)


    1. A017F0NE07

      Disconnect the T4 door lock connector.

    2. Disconnect the O14 ECU connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      T4-1 (DC+) - O14-2 (DC+) Always Below 1 Ω
      T4-2 (DC-) - O14-1 (DC-) Always Below 1 Ω
      T4-5 (HAF) - O14-22 (HAF) Always Below 1 Ω
      T4-6 (POS) - O14-24 (POS) Always Below 1 Ω
      T4-3 (BDCY) - O14-20 (FUL) Always Below 1 Ω
      T4-4 (GND) - Body ground Always Below 1 Ω
      T4-1 (DC+) - Body ground Always 10 kΩ or higher
      T4-2 (DC-) - Body ground Always 10 kΩ or higher
      T4-5 (HAF) - Body ground Always 10 kΩ or higher
      T4-6 (POS) - Body ground Always 10 kΩ or higher
      T4-3 (BDCY) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)