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ENTRY AND START SYSTEM (for Entry Function) > Back Door Entry Unlock Function does not Operate

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DESCRIPTION

If the entry back door open function does not operate but the back door entry lock function operates, the communication between the vehicle and key is normal. As a faulty part, the back door open switch circuit (from the back door opener switch assembly (opener switch) to the certification ECU (smart key ECU assembly)) is suspected.

WIRING DIAGRAM


B219120E06


INSPECTION PROCEDURE

NOTICE:
  1. The entry and start system (for entry function) uses a LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click here). Troubleshoot the entry and start system (for entry function) after confirming that the communication system is functioning properly.
  2. Confirm that another key is not in the cabin.

1.READ VALUE USING INTELLIGENT TESTER (ENTRY BACK DOOR OPEN FUNCTION)

  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 / Entry & Start / Data List.

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

    Entry & Start (Certification ECU (Smart Key ECU Assembly)) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    B-Dr Opening Operation
    		Back door opening Operation / Long, Twice, OFF
    		Customization status displayed
    		-

    Result:
    Result
    		Proceed to
    Customize setting is Long or Twice.
    		A
    Customize setting is OFF.
    		B



B
PERFORM CUSTOMIZE SETTING (Proceed to Customize Parameters) (Click here)
A


2.CHECK POWER DOOR LOCK OPERATION

  1. When the door control switch on the master switch assembly is operated, check that the doors unlock and lock according to switch operation (Click here).

    OK:
    Door locks operate normally.



NG
GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table) (Click here)
OK


3.PERFORM ACTIVE TEST USING INTELLIGENT TESTER

  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 POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table) (Click here)
OK


4.READ VALUE USING INTELLIGENT TESTER (BACK DOOR OPENER SWITCH)

  1. Enter the following menus: Body / Entry & Start / Data List.

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

    Smart Key (Certification ECU (Smart Key ECU Assembly)) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Tr/B-Door Unlock SW
    		Back door opener switch assembly (opener switch) / ON or OFF
    		ON: Back door opener switch assembly (opener switch) pushed
    OFF: Back door opener switch assembly (opener switch) not pushed
    		-

    OK:
    On the intelligent tester screen, the display changes between ON and OFF as shown in the chart above.



NG
Go to step 5
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

5.INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


    B203521E01

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

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

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

    Text in Illustration 
    *1
    		Component without harness connected
    (Back Door Opener Switch Assembly)



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


6.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BACK DOOR OPENER SWITCH)


    B203526E05

  1. Disconnect the certification ECU (smart key ECU Assembly) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L62-22 (TSW5) - V4-3 (UL)
    		Always
    		Below 1 Ω
    L62-22 (TSW5) - Body ground
    		Always
    		10 kΩ or higher
    V4-3 (UL) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Certification ECU (Smart Key ECU Assembly))
    *2
    		Front view of wire harness connector
    (to Back Door Opener Switch Assembly)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)