PARKING ASSIST MONITOR SYSTEM "Back Door is Open" is Displayed even after Back Door is Closed

DESCRIPTION

The parking assist ECU receives back door lock assembly open/close signals from the main body ECU (multiplex network body ECU) via CAN communication. When the back door is open, the camera aiming cannot be adjusted correctly because the rear television camera assembly is installed on the back door. Therefore, when adjusting the camera aiming calibration while the back door is open, a back door open warning message will be displayed on the screen and camera aiming adjustment will be canceled.

Tech Tips

The back door lock assembly is connected to the main body ECU (multiplex network body ECU) by the vehicle wire harness.

WIRING DIAGRAM

A003Z6VE01

INSPECTION PROCEDURE

Note


  • When "System initializing" is displayed on the multi-display after disconnecting the cable from the negative (-) auxiliary battery terminal, correct the steering angle neutral point Click here.

  • Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the parking assist monitor system may be needed Click here.

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Data List.

    5. Check the Data List for proper functioning of the following item.

      Main Body (Main Body ECU (Multiplex Network Body ECU))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Door Courtesy SW Back door courtesy switch signal/ON or OFF

      ON: Back door open

      OFF: Back door closed

      		 -
      OK
      The back door courtesy switch functions as specified in the normal condition column.

    NG

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BACK DOOR LOCK ASSEMBLY) Click here

    OK

    REPLACE PARKING ASSIST ECU Click here

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


    1. Disconnect the H16 connector from the main body ECU (multiplex network body ECU).

    2. Disconnect the Q17 connector from the back door lock assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H16-19 (BCTY) - Body ground Always 10 kΩ or higher
      Q17-1 (E) - Body ground Always Below 1 Ω
      H16-19 (BCTY) - Q17-2 (+) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT BACK DOOR LOCK ASSEMBLY


    1. Check the operation of the door lock motor.


      1. A003XDHE01
        Text in Illustration
        *a

        Component without harness connected

        (Back Door Lock Assembly)
        *b Lock
        *c Unlock

        Move the door lock to the lock position.

      2. Apply auxiliary battery voltage to the door lock motor and check the operation of the door lock motor.

        Connection Result

        Auxiliary battery positive (+) → 4 (ACT+)

        Auxiliary battery negative (-) → 3 (ACT-)

        		 Unlocks

    2. Check the operation of the door courtesy switch.


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

        Standard Resistance
        Measurement Condition Switch Condition Specified Condition
        2 (+) - 1 (E) Locked 10 kΩ or higher
        2 (+) - 1 (E) Unlocked Below 1 Ω

    NG

    REPLACE BACK DOOR LOCK ASSEMBLY Click here

    OK

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