Message indicating Back Door is Open is Displayed even after Back Door is Closed

PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM: Message indicating Back Door is Open is Displayed even after Back Door is Closed
- Message indicating 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.

HINT
* The back door lock assembly is connected to the main body ECU (multiplex network body ECU) by the vehicle wire harness. (w/o power back door system)
* The back door lock assembly is connected to the power back door ECU (power back door motor unit) by the vehicle wire harness. The power back door ECU (power back door motor unit) sends back door lock assembly signals to the main body ECU (multiplex network body ECU) via CAN communication. (w/ power back door system)

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
* When "System initializing" is displayed on the multi-display after the battery terminal disconnected, correct the steering angle neutral point Initialization.
* 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 Calibration.

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Check the Data List for proper functioning of the following item.

Main Body (Main Body ECU (Multiplex Network Body ECU))

OK:

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

NG -- CONFIRM MODEL

OK -- REPLACE PARKING ASSIST ECU Removal

2. CONFIRM MODEL

(a) Choose the model to be inspected.

Result:

B -- GO TO BACK DOOR CLOSER SYSTEM (DTC B2251) B2251
A -- Continue to next step.

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

(a) Disconnect the F13 connector from the main body ECU (multiplex network body ECU).

(b) Disconnect the Y9 connector from the back door lock assembly.

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. INSPECT BACK DOOR LOCK ASSEMBLY

(a) Check the operation of the door lock motor.

(1) Move the door lock to the lock position.

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

(b) Check operation of the door courtesy switch.

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

Standard Resistance:

Text in Illustration

NG -- REPLACE BACK DOOR LOCK ASSEMBLY Removal

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)