PARKING ASSIST MONITOR SYSTEM (w/ Side 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 (cowl side junction block LH) 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 (cowl side junction block LH) by the vehicle wire harness.

WIRING DIAGRAM

A01EOIXE08

INSPECTION PROCEDURE

Note


  • Since the parking assist monitor system (w/ Side Monitor System) has functions that use CAN communication system, first confirm that there is no malfunction in the communication system by inspecting the CAN communication functions in accordance with the "How to Proceed with Troubleshooting" procedures. Then, conduct the following inspection procedure.

  • When "System initializing" is displayed on the parking assist ECU after the battery terminal disconnected, 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 (w/ Side Monitor System) may be needed Click here.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (BACK DOOR COURTESY SWITCH)


    1. Use the Data List to check if the back door courtesy switch is functioning properly Click here.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Door Courtesy SW Back door courtesy light 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 (BACK DOOR LOCK ASSEMBLY - MAIN BODY ECU [COWL SIDE JUNCTION BLOCK LH] AND BODY GROUND) Click here

    OK

    REPLACE PARKING ASSIST ECU Click here

  2. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MAIN BODY ECU [COWL SIDE JUNCTION BLOCK LH] AND BODY GROUND)


    1. Disconnect the S1*1 or S19*2 back door lock assembly connector.


      • *1: w/o Power Back Door System

      • *2: w/ Power Back Door System

    2. Disconnect the E2 main body ECU (cowl side junction block LH) connector.

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

      Standard Resistance
      w/o Power Back Door System
      Tester Connection Condition Specified Condition
      S1-3 (+) - E2-25 (BCTY) Always Below 1 Ω
      S1-3 (+) - Body ground Always 10 kΩ or higher
      S1-1 (ACT-) - Body ground Always Below 1 Ω
      w/ Power Back Door System
      Tester Connection Condition Specified Condition
      S19-3 (CTY) - E2-25 (BCTY) Always Below 1 Ω
      S19-3 (CTY) - Body ground Always 10 kΩ or higher
      S19-4 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT BACK DOOR LOCK ASSEMBLY


    1. Remove the back door lock assembly Click here.

    2. Inspect the back door lock assembly Click here.


    NG

    REPLACE BACK DOOR LOCK ASSEMBLY Click here

    OK

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)