BACK DOOR CLOSER SYSTEM Back Door cannot be Opened

DESCRIPTION

When the back door cannot be opened, one of the following may be malfunctioning: 1) power back door ECU (power back door motor unit)*1 or back door closer ECU (multiplex network door ECU)*2, 2) back door lock assembly, 3) back door opener switch assembly, or 4) main body ECU (driver side junction block assembly).


WIRING DIAGRAM

A01EKR0E03

INSPECTION PROCEDURE

Note

The back door closer system uses CAN communication. First, follow "How to Proceed with Troubleshooting" and at step "Check Communication Function of CAN Communication System", confirm that there is no malfunction in the CAN communication system. After confirming that B2250 or B2251 is not output, proceed with troubleshooting.

PROCEDURE


  1. READ VALUE USING GTS


    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 / Main Body / Data List.

    5. Check if the back door lock functions properly.

      Main Body (Main Body ECU (Driver Side Junction Block Assembly))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Door Open Back door lock / Permit or Prohibit

      Permit: Back door unlocked

      Prohibit: Back door locked

      		 -
      OK
      The back door functions as specified in the normal condition column.

    NG

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here

    OK

  2. READ VALUE USING GTS


    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 if the back door lock functions properly.

      Back Door (Power Back Door ECU*1 or Back Door Closer ECU*2)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Door Lock Status Back door lock condition signal / LOCK or UNLOCK

      LOCK: Back door locked

      UNLOCK: Back door unlocked

      		 -

      • *1: w/ Power Back Door System

      • *2: w/o Power Back Door System

      OK
      The back door functions as specified in the normal condition column.
      Result
      Result Proceed to
      OK A
      NG (w/ Power Back Door ECU) B
      NG (w/o Power Back Door ECU) 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

  3. READ VALUE USING GTS


    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 / Main Body / Data List.

    5. Check if the switch functions properly.

      Main Body (Main Body ECU (Driver Side Junction Block Assembly))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Door Open Handle SW Back door opener switch / ON or OFF

      ON: Back door opener switch pushed

      OFF: Back door opener switch not pushed

      		 -
      OK
      The back door opener switch functions as specified in the normal condition column.

    NG

    INSPECT BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

  4. 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.

      A01EJMNE04
      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
      Sector Switch
      Tester Connection Condition Specified Condition
      6 (DLSW) - 4 (E) Sector gear in neutral position (Sector switch on) Below 1 Ω
      6 (DLSW) - 4 (E) Sector gear not in neutral position (Sector switch off) 10 kΩ or higher
      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

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


    1. A01EMFFE24
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Door Lock Assembly)
      *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. A01EM9ME07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Door Lock Assembly)
      *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

  6. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


    1. Remove the back door opener switch assembly Click here.

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

      A01EK2JE22
      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (E) - 3 (UL) Back door opener switch not pushed (off) 10 kΩ or higher
      2 (E) - 3 (UL) Back door opener switch pushed (on) Below 1 Ω

    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - MAIN BODY ECU)


    1. Disconnect the R13 back door opener switch assembly connector and D49 main body ECU connector.

    2. A01EJJGE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Door Opener Switch Assembly)
      *2

      Front view of wire harness connector

      (to Main Body ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R13-3 (UL) - D49-2 (BDSU) Always Below 1 Ω
      R13-2 (E) - Body ground Always Below 1 Ω
      R13-3 (UL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here