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Only Back Door cannot be Opened [02/2017 - ]: Procedure

  1. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      w/ Smart Key System A
      w/o Smart Key System B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  2

  2. INSPECT BACK DOOR LOCK ASSEMBLY 
    1. Remove the back door lock assembly.

      Refer to REMOVAL [02/2017 - ]

    2. Inspect the back door lock assembly.

      Refer to INSPECTION [02/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE BACK DOOR LOCK ASSEMBLY. Refer to  REMOVAL [02/2017 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the 3H instrument panel junction block assembly connector.
    2. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      S9-1 (ACT+) - 3H-20 Always Below 1 Ω
      S9-3 (D+) - 3H-34 Always Below 1 Ω
      S9-2 (ACT-) - Body ground Always Below 1 Ω
      S9-1 (ACT+) or 3H-20 - Body ground Always 10 kΩ or higher
      S9-3 (D+) or 3H-34 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly.

      Refer to REMOVAL [02/2017 - 10/2017] , or refer to REMOVAL [10/2017 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - ]

      GTY758036Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -
    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
    3. Measure the voltage according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3H-20 - Body ground Battery voltage not applied between 3K-1 and MB-6 (TR+) Below 1 V
      3H-20 - Body ground Battery voltage applied between 3K-1 and MB-6 (TR+) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [02/2017 - 10/2017]  , or refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    OK 

    See step  5

  5. CHECK BACK DOOR OPEN OPERATION 
    1. Check that the back door can be opened.

      OK

      The back door can be opened.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [02/2017 - 10/2017]  , or refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

  6. CHECK POWER DOOR LOCK OPERATION (BASIC FUNCTION) 
    1. Check the power door lock basic function.

      OK

      The power door lock basic functions operate normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [02/2017 - 10/2017]  , or refer to  PROBLEM SYMPTOMS TABLE [10/2017 - 12/2021]  , or refer to  PROBLEM SYMPTOMS TABLE [12/2021 - ]  

    Result: 

    OK 

    See step  7

  7. READ VALUE USING TECHSTREAM (Back Door Open) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Main Body / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > Main Body > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Back Door Open Back door lock signal Prohibit or Permit Prohibit: Back door locked
      Permit: Back door unlocked      		 -

      Body Electrical > Main Body > Data List 

      Tester Display
      Back Door Open

      OK

      On the Techstream screen, Prohibit or Permit is displayed accordingly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [02/2017 - 10/2017]  , or refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    OK 

    See step  8

  8. PERFORM ACTIVE TEST USING TECHSTREAM (Trunk and Back-Door Open) 
    1. Enter the following menus: Body Electrical / Main Body / Active Test.
    2. Perform the Active Test according to the display on the Techstream.

      Body Electrical > Main Body > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Trunk and Back-Door Open Back door lock motor OFF/ON -

      Body Electrical > Main Body > Active Test 

      Tester Display
      Trunk and Back-Door Open

      OK

      The back door lock assembly operates normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  9

  9. READ VALUE USING TECHSTREAM (Back Door Open Handle SW) 
    1. Enter the following menus: Body Electrical / Main Body / Data List.
    2. Read the Data List according to the display on the Techstream.

      Body Electrical > Main Body > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Back Door Open Handle SW Back door opener switch signal OFF or ON OFF: Back door closed
      ON: Back door open      		 -

      Body Electrical > Main Body > Data List 

      Tester Display
      Back Door Open Handle SW

      OK

      On the Techstream screen, ON or OFF is displayed accordingly.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [02/2017 - 10/2017]  , or refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    See step  10

  10. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY 
    1. Remove the back door opener switch assembly.

      Refer to REMOVAL [02/2017 - ]

    2. Inspect the back door opener switch assembly.

      Refer to INSPECTION [02/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY. Refer to  REMOVAL [02/2017 - ] 

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the F15 main body ECU (multiplex network body ECU) connector.
    2. Disconnect the S8 back door opener switch assembly connector.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F15-18 (BDSU) - S8-3 (UL) Always Below 1 Ω
      S8-2 (E) - Body ground Always Below 1 Ω
      F15-18 (BDSU) or S8-3 (UL) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [02/2017 - 10/2017]  , or refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  12. INSPECT BACK DOOR LOCK ASSEMBLY 
    1. Remove the back door lock assembly.

      Refer to REMOVAL [02/2017 - ]

    2. Inspect the back door lock assembly.

      Refer to INSPECTION [02/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE BACK DOOR LOCK ASSEMBLY. Refer to  REMOVAL [02/2017 - ] 

    Result: 

    OK 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the 3H instrument panel junction block assembly connector.
    2. Disconnect the S9 back door lock assembly connector.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      S9-1 (ACT+) - 3H-20 Always Below 1 Ω
      S9-3 (D+) - 3H-34 Always Below 1 Ω
      S9-2 (ACT-) - Body ground Always Below 1 Ω
      S9-1 (ACT+) or 3H-20 - Body ground Always 10 kΩ or higher
      S9-3 (D+) or 3H-34 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  14

  14. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly.

      Refer to REMOVAL [02/2017 - 10/2017] , or refer to REMOVAL [10/2017 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - ]

      GTY758036Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -
    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
    3. Measure the resistance according to the value(s) in the chart below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3H-20 - Body ground Battery voltage not applied between 3K-1 and MB-6 (TR+) Below 1 V
      3H-20 - Body ground Battery voltage applied between 3K-1 and MB-6 (TR+) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [02/2017 - 10/2017]  , or refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

    Result: 

    OK 

    See step  15

  15. CHECK BACK DOOR OPEN OPERATION 
    1. Check that the back door can be opened.

      OK

      The back door can be opened.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [02/2017 - 10/2017]  , or refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - ] 

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