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 combination switch assembly, one of the following may be malfunctioning: 1) combination switch assembly circuit, 2) multiplex network door ECU or 3) main body ECU (multiplex network body ECU).

WIRING DIAGRAM

B002L2XE02
*a Combination Switch Assembly
*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.

    Click here

  • 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) is replaced, refer to Service Bulletin.

PROCEDURE


  1. READ VALUE USING GTS


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

      Click here


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

      ON: Combination switch assembly pushed

      OFF: Combination switch assembly not pushed

      		 -

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

    NG

    INSPECT COMBINATION 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. Perform the initialization for the multiplex network door ECU.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK BACK DOOR CLOSER SYSTEM


    1. Check that the power back door operates normally.

      Click here

      OK
      Power back door 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 COMBINATION SWITCH ASSEMBLY


    1. Remove the combination switch assembly.

      Click here

    2. Inspect the combination switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] AND BODY GROUND)


    1. Disconnect the I33 combination switch assembly connector.

    2. Disconnect the I47 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
      I33-6 (B) - I47-5 (PBDS) Always Below 1 Ω
      I33-16 (L) - Body ground Always Below 1 Ω
      I33-6 (B) or I47-5 (PBDS) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

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

    B

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

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR