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

for Preparation Click here


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.

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


WIRING DIAGRAM


E224368E01


INSPECTION PROCEDURE

NOTICE:
  1. 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).
  2. 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).
  3. 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).

1.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

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

  1. 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
Go to step 2
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).

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

  1. 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.



      E222958E01

    1. 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

  1. 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

      Text in Illustration 
      *a
      		Component without harness connected
      (Back Door Lock Assembly)
      *b
      		Lock
      *c
      		Unlock



NG
REPLACE BACK DOOR LOCK ASSEMBLY (Click here)
OK

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