POWER DOOR LOCK CONTROL SYSTEM Only Back Door cannot be Opened

DESCRIPTION

The main body ECU (multiplex network body ECU) receives signals from the back door opener switch assembly. When a signal received is the main body ECU (multiplex network body ECU) activates the back door lock motor.

WIRING DIAGRAM

B005PGJE02

CAUTION / NOTICE / HINT

Note


  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

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

    Click here

  • Before performing this troubleshooting procedure , perform troubleshooting for the entry and start system (for Entry Function) (Back Door Entry Unlock Function does not Operate) first.

    Click here

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before proceeding with troubleshooting, perform an on-vehicle inspection and confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

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

PROCEDURE


  1. INSPECT BACK DOOR LOCK ASSEMBLY


    1. Remove the back door lock assembly.

      Click here

    2. Inspect the back door lock assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BACK DOOR LOCK ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the 2D instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Z6-1 (ACT+) - 2D-20 Always Below 1 Ω
      Z6-3 (D+) - 2D-34 Always Below 1 Ω
      Z6-2 (ACT-) - Body ground Always Below 1 Ω
      Z6-1 (ACT+) or 2D-20 - Body ground Always 10 kΩ or higher
      Z6-3 (D+) or 2D-34 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Replace the instrument panel junction block assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK BACK DOOR OPEN OPERATION


    1. Check that the back door can be opened.

      OK
      The back door can be opened.
      Result
      Proceed to
      OK
      NG

    OK

    END (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WAS DEFECTIVE)

    NG

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