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

DESCRIPTION

When the power back door cannot be opened or closed using the back door control switch, one of the following may be malfunctioning: 1) back door control switch circuit, 2) multiplex network door ECU or 3) main body ECU (multiplex network body ECU).

WIRING DIAGRAM

A01V95NE01
*a Back Door Control Switch
*b Multiplex Network Door ECU
*c Main Body ECU (Multiplex Network Body ECU)
*d CAN Communication Line

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.

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE


  1. READ VALUE USING GTS


    1. Check the Data List to determine if the back door control switch functions properly.

      Click here


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

      ON: Back door control switch pushed

      OFF: Back door control switch not pushed

      		 -

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

    NG

    INSPECT BACK DOOR CONTROL SWITCH 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. Perform the initialization for the multiplex network door ECU.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK POWER BACK DOOR SYSTEM


    1. Check that the power back door operates normally.

      Click here

      Result
      Proceed to
      Power back door operates normally
      Power back door does not operate

    Power back door operates normally

    END (MULTIPLEX NETWORK DOOR ECU WAS DEFECTIVE)

    Power back door does not operate

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

  5. INSPECT BACK DOOR CONTROL SWITCH


    1. Remove the back door control switch.

      for LHD: Click here

      for RHD: Click here

    2. Inspect the back door control switch.

      for LHD: Click here

      for RHD: Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BACK DOOR CONTROL SWITCH for LHD: Click here
    REPLACE BACK DOOR CONTROL SWITCH for RHD: Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (BACK DOOR CONTROL SWITCH - MULTIPLEX NETWORK BODY ECU AND BODY GROUND)


    1. Disconnect the G73 back door control switch connector.

    2. Disconnect the G79 main body ECU (multiplex network body ECU) connector.

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

      Standard Resitance
      Tester Connection Condition Specified Condition
      G73-4 (MSW) - G79-27 (PBDS) Always Below 1 Ω
      G73-1 (MSE) - Body ground Always Below 1 Ω
      G73-4 (MSW) or G79-27 (PBDS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR