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

DESCRIPTION

The multiplex network door ECU receives open request signals from the back door opener switch assembly via CAN communication.

WIRING DIAGRAM

B005N2QE02

CAUTION / NOTICE / HINT

Note


  • The power back door system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power back door system after confirming that the CAN communication system is functioning properly.

    Click here

  • If the multiplex network door ECU has been removed and installed or replaced, or if any of the connectors has been disconnected, 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 following troubleshooting procedure is based on the premise that the entry and start system (for Entry Function) is operating normally. Check the entry and start system (for Entry Function) before troubleshooting the power back door system.

    Click here

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), inspect the main body ECU (multiplex network body ECU) power source circuit for malfunctions before performing this troubleshooting procedure.*

    Click here


    • *: w/o Canister Pump Module with Door Ajar Warning Function

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry&Start / Data List.

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


      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 OFF or ON

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

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

      		 -

      Body Electrical > Entry&Start > Data List
      Tester Display
      Tr/B-Door Unlock SW
      OK
      On the GTS screen, ON or OFF is displayed accordingly.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

  2. REPLACE MULTIPLEX NETWORK DOOR ECU


    1. Replace the multiplex network door ECU with a new or known good 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 the power back door system operation.

      Click here

      OK
      Power back door system operates normally
      Result
      Proceed to
      OK
      NG

    OK

    END (MULTIPLEX NETWORK DOOR ECU WAS MALFUNCTIONING)

    NG

    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 z8 back door opener switch assembly connector.

    2. Disconnect the R1*1 or S5*2 certification ECU (smart key ECU assembly) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      z8-3 (UL) - R1-26 (TSW5) Always Below 1 Ω
      z8-2 (E) - Body ground Always Below 1 Ω
      z8-3 (UL) or R1-26 (TSW5) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      z8-3 (UL) - S5-26 (TSW5) Always Below 1 Ω
      z8-2 (E) - Body ground Always Below 1 Ω
      z8-3 (UL) or S5-26 (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