POWER DOOR LOCK CONTROL SYSTEM > Only Back Door cannot be Opened

for Preparation Click here


DESCRIPTION

The main body ECU (multiplex network body ECU) receives signals from the back door opener switch assembly. Then, the main body ECU (multiplex network body ECU) activates the back door lock motor.

WIRING DIAGRAM


B228533E09


INSPECTION PROCEDURE

1.SYSTEM CHECK

  1. Check the vehicle specification.

    Result:
    Result
    		Proceed to
    w/o Entry System Back Door Open Function
    		A
    w/ Entry System Back Door Open Function
    		B



B
Go to step 6
A


2.CHECK POWER DOOR LOCK OPERATION (BASIC FUNCTION)

  1. Check the power door lock basic function (Click here).

    OK:
    The power door lock basic functions operate normally.



NG
GO TO PROBLEM SYMPTOMS TABLE (Click here)
OK


3.READ VALUE USING INTELLIGENT TESTER (DOOR LOCK STATUS)

  1. Unlock all doors.

  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. Read the Data List according to the display on the intelligent tester.


Main Body (Main Body ECU (Multiplex Network Body ECU)) 
Tester Display
Measurement Item/Range
Normal Condition
Diagnostic Note
Back Door Open
Back door lock/Permit or Prohibt
Permit: Back door unlocked
Prohibt: Back door locked
-

OK:
The intelligent tester indicates Permit according to the door lock operation shown in the table.



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


4.PERFORM ACTIVE TEST 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 / Active Test.

  1. Perform the Active Test according to the display on the intelligent tester.

    Main Body (Main Body ECU (Multiplex Network Body ECU)) 
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Trunk and Back-Door Open
    		Operate back door lock motor
    		ON or OFF
    		-

    OK:
    The back door lock assembly unlatches when ON is selected.



NG
Go to step 6
OK


5.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. Read the Data List according to the display on the intelligent tester.

    Main Body (Main Body ECU (Multiplex Network Body ECU)) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Back Door Open Handle SW
    		Back door opener switch signal/ON or OFF
    		ON: Back door opener switch pushed
    OFF: Back door opener switch not pushed
    		-

    OK:
    The intelligent tester indicates ON or OFF according to the switch operation shown in the table.



NG
Go to step 10
OK

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

6.INSPECT BACK DOOR LOCK ASSEMBLY


    E222958E03

  1. Remove the back door lock assembly (Click here).

  1. Check the operation of the door lock motor.

    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.

      OK:
      Connection
      		Result
      Auxiliary battery positive (+) → Terminal 4 (ACT+)
      Auxiliary battery negative (-) → Terminal 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:
      Tester Connection
      		Switch Condition
      		Specified Condition
      1 (E) - 2 (+)
      		Locked
      		10 kΩ or higher
      1 (E) - 2 (+)
      		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


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

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

  1. Disconnect the instrument panel junction block assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Q17-4 (ACT+) - 2D-9 (TR+)
    		Always
    		Below 1 Ω
    Q17-4 (ACT+) - Body ground
    		Always
    		10 kΩ or higher
    Q17-2 (+) - H16-19 (BCTY)
    		Always
    		Below 1 Ω
    Q17-2 (+) - Body ground
    		Always
    		10 kΩ or higher
    Q17-3 (ACT-) - Body ground
    		Always
    		Below 1 Ω
    Q17-1 (E) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  1. Replace the instrument panel junction block assembly (Click here).


NEXT


9.CHECK BACK DOOR OPEN OPERATION

  1. Check that the back door can be opened.

    OK:
    The back door can be opened normally.



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

END (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WAS DEFECTIVE) 

10.INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


    B235123E04

  1. Remove the back door opener switch assembly (Click here).

  1. Check the operation of the opener switch.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    2 (E) - 3 (UL)
    		Back door opener switch not pushed
    		10 kΩ or higher
    2 (E) - 3 (UL)
    		Back door opener switch pushed
    		Below 1 Ω

    Text in Illustration 
    *a
    		Component without harness connected
    (Back Door Opener Switch Assembly)



NG
REPLACE BACK DOOR OPENER SWITCH ASSEMBLY (Click here)
OK


11.CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH ASSEMBLY - MAIN BODY ECU)

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

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    V4-3 (UL) - H16-23 (BDSU)
    		Always
    		Below 1 Ω
    V4-3 (UL) - Body ground
    		Always
    		10 kΩ or higher
    V4-2 (E) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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