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

DTC Code DTC Name
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

E270968E01

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 hereClick hereClick hereClick 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 SWITCHClick here

    OK

  2. REPLACE MULTIPLEX NETWORK DOOR ECU

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

      Click hereClick 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 hereClick hereClick hereClick hereClick 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

    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

    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 hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR