POWER BACK DOOR SYSTEM Power Back Door cannot be Opened Using the Back Door Opener Switch

DESCRIPTION

The multiplex network door ECU receives an open signal from the back door opener switch assembly via the certification ECU (smart key ECU assembly).

WIRING DIAGRAM

B0059YZE01

CAUTION / NOTICE / HINT

Note


  • First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this problem.

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  • If the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU has been performed, initialize the power back door system.

    Click here

  • If the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly) is replaced, refer to Service Bulletin.

  • The power back door system troubleshooting procedure is based on the premise that the entry and start system (for Entry Function) is operating normally. Check the power back door system first before troubleshooting the power back door system.

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  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*


    • *: w/ Door Control Battery

PROCEDURE


  1. READ VALUE USING GTS


    1. Read the Data List according to the display on the GTS.

      Click here


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

      ON: Back door opener switch assembly (open switch) on

      OFF: Back door opener switch assembly (open switch) off

      		 -

      Body Electrical > Entry&Start > Data List
      Tester Display
      Tr/B-Door Unlock SW
      OK
      On GTS screen, item changes between ON and OFF according to above chart.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

  2. 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

  3. INITIALIZE MULTIPLEX NETWORK DOOR ECU


    1. Initialize the multiplex network door ECU.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK POWER BACK DOOR SYSTEM


    1. Check power back door system operation.

      Click here

      OK
      Power back door system operates normally
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    END (MULTIPLEX NETWORK DOOR ECU WAS DEFECTIVE)

    B

    REPLACE MAIN BODY ECU(MULTIPLEX NETWORK BODY ECU) Click here

    C

    REPLACE MAIN BODY ECU(MULTIPLEX NETWORK BODY ECU) Click here

  5. 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

  6. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY])


    1. Disconnect the Y7 back door opener switch assembly connector.

    2. Disconnect the I52 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
      Y7-3 (UL) - I52-5 (TSW5) Always Below 1 Ω
      Y7-2 (E) - Body ground Always Below 1 Ω
      Y7-3 (UL) or I52-5 (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