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) multiplex network door ECU, 2) back door lock assembly, 3) back door opener switch assembly, 4) main body ECU (multiplex network body ECU), or 5) certification ECU (smart key ECU assembly)*.


WIRING DIAGRAM

A01KDMNE02

CAUTION / NOTICE / HINT

Note


  • For vehicles with an entry and start system:

    Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system.

    Click here

  • The back door closer system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Back Door > Trouble Codes
      Result
      Proceed to
      DTC is not output
      DTC B2250 is output
      DTC B2251 is output

    DTC B2250 is output

    GO TO DTC CHART Click here

    DTC B2251 is output

    GO TO DTC CHART Click here

    DTC is not output

  2. BASIC FUNCTION POWER DOOR LOCK OPERATION


    1. Check the power door lock basic function.

      Click here

      OK
      The power door lock basic function can be operated normally.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

    OK

  3. READ VALUE USING GTS


    1. Check if the back door lock functions properly.

      Click here


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Back Door Open Back door condition signal Permit or Prohibit

      Permit: Back door unlocked

      Prohibit: Back door locked

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Back Door Open
      OK
      The back door functions as specified in the normal condition column.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: Click here
    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for RHD: Click here

    OK

  4. READ VALUE USING GTS


    1. Check if the back door lock functions properly.

      Click here


      Body Electrical > Back Door > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Door Lock Status Back door condition signal Lock or Unlock

      Lock: Back door locked

      Unlock: Back door unlocked

      		 -

      Body Electrical > Back Door > Data List
      Tester Display
      Door Lock Status
      OK
      The back door functions as specified in the normal condition column.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here

    OK

  5. CHECK VEHICLE TYPE


    1. Check vehicle types.

      Result
      Proceed to
      w/ Entry and Start System
      w/o Entry and Start System

    w/o Entry and Start System

    READ VALUE USING GTS Click here

    w/ Entry and Start System

  6. READ VALUE USING GTS


    1. Check if the back door opener switch assembly functions properly.

      Click here


      Body Electrical > Entry&Start > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Tr/B-Door Unlock SW Back door control switch assembly signal ON or OFF

      ON: Back door opener switch assembly on

      OFF: Back door opener switch assembly off

      		 -

      Body Electrical > Entry&Start > Data List
      Tester Display
      Tr/B-Door Unlock SW
      OK
      The back door control switch assembly functions as specified in the normal condition column.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

  7. INSPECT BACK DOOR LOCK ASSEMBLY


    1. Remove the back door lock assembly.

      Click here

    2. Inspect the back door lock assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BACK DOOR LOCK ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND)


    1. Disconnect the U13 back door lock assembly connector.

    2. Disconnect the U18 and U19 multiplex network door ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U13-1 (M+) - U19-10 (DC+) Always Below 1 Ω
      U13-2 (M-) - U19-9 (DC-) Always Below 1 Ω
      U13-3 (CTY) - U18-19 (FUL) Always Below 1 Ω
      U13-5 (CLS) - U18-21 (HAF) Always Below 1 Ω
      U13-6 (OPN) - U18-24 (POS) Always Below 1 Ω
      U13-4 (E) - Body ground Always Below 1 Ω
      U13-1 (M+) or U19-10 (DC+) - Body ground Always 10 kΩ or higher
      U13-2 (M-) or U19-9 (DC-) - Body ground Always 10 kΩ or higher
      U13-3 (CTY) or U18-19 (FUL) - Body ground Always 10 kΩ or higher
      U13-5 (CLS) or U18-21 (HAF) - Body ground Always 10 kΩ or higher
      U13-6 (OPN) or U18-24 (POS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. REPLACE MULTIPLEX NETWORK DOOR ECU


    1. Temporarily replace the multiplex network door ECU with a new or normally functioning one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  10. CHECK BACK DOOR CLOSER


    1. Check the back door open operation.

      Result
      Proceed to
      Back door can be opened
      Back door cannot be opened

    Back door can be opened

    END (MULTIPLEX NETWORK DOOR ECU WAS DEFECTIVE)

    Back door cannot be opened

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: Click here
    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for RHD: Click here

  11. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


    1. Remove the back door opener switch assembly.

      Click here

    2. Inspect the back door opener switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

  12. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - CERTIFICATION ECU AND BODY GROUND)


    1. Disconnect the U7 back door opener switch assembly connector.

    2. Disconnect the G83 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U7-3 (UL) - G83-27 (TSW5) Always Below 1 Ω
      U7-2 (E) - Body ground Always Below 1 Ω
      U7-3 (UL) or G83-27 (TSW5) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. READ VALUE USING GTS


    1. Check if the back door opener switch assembly functions properly.

      Click here


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Back Door Open Handle SW Back door control switch assembly signal ON or OFF

      ON: Back door opener switch assembly on

      OFF: Back door opener switch assembly off

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Back Door Open Handle SW
      OK
      The back door control switch assembly functions as specified in the normal condition column.
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 7 Click here

    NG

  14. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


    1. Remove the back door opener switch assembly.

      Click here

    2. Inspect the back door opener switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the U7 back door opener switch assembly connector.

    2. Disconnect the G78 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U7-3 (UL) - G78-23 (BDSU) Always Below 1 Ω
      U7-2 (E) - Body ground Always Below 1 Ω
      U7-3 (UL) or G78-23 (BDSU) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: Click here
    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for RHD: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR