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

DESCRIPTION

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

WIRING DIAGRAM

A018JNJE02
*a Rear Door Control Switch
*b Main Body ECU (Multiplex Network Body ECU)
*c Multiplex Network Door ECU
*d CAN Communication Line

CAUTION / NOTICE / HINT

Note


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

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

  • 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.*

    Click here


    • *: for LHD

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 / Main Body / Data List.

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


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

      ON: Rear door control switch on

      OFF: Rear door control switch off

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Back Door Open SW
      OK
      On the GTS screen, ON or OFF is displayed accordingly.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT REAR DOOR CONTROL SWITCH Click here

    OK

  2. REPLACE MULTIPLEX NETWORK DOOR ECU


    1. Temporarily 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. 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 system operates normally.

      Click here

      Result
      Result Proceed to
      Power back door system operates normally A
      Power back door system does not operate B

    A

    END (MULTIPLEX NETWORK DOOR ECU WAS DEFECTIVE)

    B

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

  5. INSPECT REAR DOOR CONTROL SWITCH


    1. Remove the rear door control switch.

      Click here

    2. Inspect the rear door control switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR DOOR CONTROL SWITCH Click here

    OK

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


    1. Disconnect the F1 rear door control switch connector.

    2. Disconnect the F18 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
      F1-4 (MSW) - F18-5 (PBDS) Always Below 1 Ω
      F1-1 (MSE) - Body ground Always Below 1 Ω
      F1-4 (MSW) or F18-5 (PBDS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR