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 the back door, or a foreign matter is stuck in the back door or 2) initialization of the power back door ECU (power back door motor unit)*1, or a malfunction in the 3) power back door ECU (power back door motor unit)*1 or back door closer ECU (multiplex network door ECU)*2 power source circuit, 4) back door lock circuit, or 5) power back door ECU (power back door motor unit)*1 or back door closer ECU (multiplex network door ECU)*2.


WIRING DIAGRAM

A01EMCPE02

INSPECTION PROCEDURE

Note

Inspect fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK BACK DOOR LOCK FUNCTION


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

      Result
      Result Proceed to
      OK (w/ Power Back Door System) A
      OK (w/o Power Back Door System) B
      NG C

    B

    CHECK DTC OUTPUT Click here

    C

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

    A

  2. INITIALIZE POWER BACK DOOR ECU


    1. Perform the initialization of the power back door ECU (power back door motor unit) Click here.


    NEXT

  3. CHECK BACK DOOR CLOSER SYSTEM


    1. Check back door closer system operation.

      OK
      Back door closer system operates normally.

    NG

    READ VALUE USING GTS (POWER BACK DOOR TOUCH SENSOR) Click here

    OK

    END

  4. READ VALUE USING GTS (POWER BACK DOOR TOUCH SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Back Door / Data List.

    5. Check the Data List to determine if the power back door touch sensor functions properly.

      Back Door (Power Back Door ECU)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      PBD Touch Sensor (Right) Power back door touch sensor RH signal / ON or OFF

      ON: Power back door touch sensor RH pressed

      OFF: Power back door touch sensor RH not pressed

      		 -
      PBD Touch Sensor (Left) Power back door touch sensor LH signal / ON or OFF

      ON: Power back door touch sensor LH pressed

      OFF: Power back door touch sensor LH not pressed

      		 -
      OK
      The power back door sensors function as specified in the normal condition column.

    NG

    GO TO OTHER FLOW CHART (TOUCH SENSOR CIRCUIT) Click here

    OK

  5. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Back Door / DTC.

    5. Check for DTCs.

      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

  6. CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    1. A01EKW9E04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Back Door ECU)

      w/ Power Back Door System


      1. Disconnect the L20 power back door ECU connector.

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        L20-8 (IG) - Body ground Ignition switch ON 11 to 14 V
        L20-10 (ECUB) - Body ground Always 11 to 14 V
        L20-12 (B) - Body ground Always 11 to 14 V
    2. A01EKCSE03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Door Closer ECU)

      w/o Power Back Door System


      1. Disconnect the L21 back door closer ECU connector.

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        L21-4 (B) - Body ground Always 11 to 14 V
        L21-16 (ECUB) - Body ground Always 11 to 14 V
        L21-15 (IG) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (BODY GROUND)


    1. A01EKW9E05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Back Door ECU)

      w/ Power Back Door System


      1. Disconnect the L20 power back door ECU connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        L20-11 (GND) - Body ground Always Below 1 Ω
    2. A01EKCSE04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Door Closer ECU)

      w/o Power Back Door System


      1. Disconnect the L21 back door closer ECU connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        L21-3 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT BACK DOOR LOCK ASSEMBLY


    1. Remove the back door lock assembly Click here.

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

      A01EITFE16
      OK
      Measurement Condition Specified Condition

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

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

      		 Latch turns to full-latch position

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

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

      		 Latch turns to open-latch position

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

      Standard Resistance
      Latch Switch
      Tester Connection Condition Specified Condition
      5 (ULSW) - 4 (E) Open-latch Below 1 Ω
      5 (ULSW) - 4 (E) Half-latch 10 kΩ or higher
      5 (ULSW) - 4 (E) Full-latch 10 kΩ or higher
      5 (ULSW) - 4 (E) Over-latch Below 1 Ω
      Back Door Courtesy Switch
      Tester Connection Condition Specified Condition
      3 (CTY) - 4 (E) Open-latch Below 1 Ω
      3 (CTY) - 4 (E) Half-latch Below 1 Ω
      3 (CTY) - 4 (E) Full-latch 10 kΩ or higher
      3 (CTY) - 4 (E) Over-latch 10 kΩ or higher

    NG

    REPLACE BACK DOOR LOCK ASSEMBLY Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - POWER BACK DOOR ECU OR BACK DOOR CLOSER ECU)


    1. A01EMFFE23
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Door Lock)
      *2

      Front view of wire harness connector

      (to Power Back Door ECU)

      w/ Power Back Door System


      1. Disconnect the R1 back door lock assembly connector and L20 power back door ECU connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        R1-1 (M+) - L20-2 (DC+) Always Below 1 Ω
        R1-2 (M-) - L20-1 (DC-) Always Below 1 Ω
        R1-5 (ULSW) - L20-22 (HAF) Always Below 1 Ω
        R1-6 (DLSW) - L20-24 (POS) Always Below 1 Ω
        R1-3 (CTY) - L20-20 (FUL) Always Below 1 Ω
        R1-4 (E) - Body ground Always Below 1 Ω
        R1-1 (M+) - Body ground Always 10 kΩ or higher
        R1-2 (M-) - Body ground Always 10 kΩ or higher
        R1-5 (ULSW) - Body ground Always 10 kΩ or higher
        R1-6 (DLSW) - Body ground Always 10 kΩ or higher
        R1-3 (CTY) - Body ground Always 10 kΩ or higher
    2. A01EM9ME06
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Door Lock)
      *2

      Front view of wire harness connector

      (to Back Door Closer ECU)

      w/o Power Back Door System


      1. Disconnect the R1 back door lock assembly connector and L21 back door closer ECU connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        R1-1 (M+) - L21-2 (DC+) Always Below 1 Ω
        R1-2 (M-) - L21-1 (DC-) Always Below 1 Ω
        R1-3 (CTY) - L21-6 (FUL) Always Below 1 Ω
        R1-5 (ULSW) - L21-5 (HAF) Always Below 1 Ω
        R1-6 (DLSW) - L21-7 (POS) Always Below 1 Ω
        R1-4 (E) - Body ground Always Below 1 Ω
        R1-1 (M+) - Body ground Always 10 kΩ or higher
        R1-2 (M-) - Body ground Always 10 kΩ or higher
        R1-3 (CTY) - Body ground Always 10 kΩ or higher
        R1-5 (ULSW) - Body ground Always 10 kΩ or higher
        R1-6 (DLSW) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (w/ Power Back Door System) B
      OK (w/o Power Back Door System) C

    B

    REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) Click here

    C

    REPLACE BACK DOOR CLOSER ECU (MULTIPLEX NETWORK DOOR ECU)

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR