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

for Preparation Click here


DESCRIPTION

If the entry lock function does not operate for the back door only, but the entry unlock function operates, the request code is being transmitted properly from the back door. In this case, there may be a problem related to the lock switch (connection between the back door opener switch assembly and certification ECU (smart key ECU assembly)).

WIRING DIAGRAM


B265877E10


INSPECTION PROCEDURE

NOTICE:
  1. The entry and start system (for Entry Function) uses a multiplex communication system (LIN communication system) and the 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 systems are functioning properly.
  2. When using the intelligent tester with the power switch off to troubleshoot:
    Connect the intelligent tester to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the intelligent tester and vehicle begins.
  3. Check that there are no electrical key transmitters in the vehicle.
  4. Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) (Click here).

1.CHECK POWER DOOR LOCK OPERATION

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

    OK:
    Door locks operate normally.



NG
GO TO POWER DOOR LOCK CONTROL SYSTEM (Click here)
OK


2.READ VALUE USING INTELLIGENT TESTER (LOCK SWITCH)

  1. Using the intelligent tester, read the Data List (Click here).

    Entry&Start 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Tr/B-Door Lock SW
    		Back door opener switch (lock switch) / ON or OFF
    		ON: Back door opener switch (lock switch) pushed
    OFF: Back door opener switch (lock switch) not pushed
    1. Displays whether the back door opener switch assembly (lock switch) is on or off.
    2. Use this Data List item to help determine if there is a switch malfunction when the back door lock function does not operate.

    OK:
    The intelligent tester display changes correctly in response to the operation of the back door opener switch assembly.



NG
Go to step 3
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

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

  1. Disconnect the V4 back door opener switch assembly connector.

  1. Disconnect the H1 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
    V4-1 (L) - H1-23 (TSW6)
    		Always
    		Below 1 Ω
    V4-2 (E) - Body ground
    		Always
    		Below 1 Ω
    V4-1 (L) or H1-23 (TSW6) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT BACK DOOR OPENER SWITCH ASSEMBLY (LOCK SWITCH)
B235123E03

  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 Condition
    		Specified Condition
    1 (L) - 2 (E)
    		No switch pushed
    		10 kΩ or higher
    1 (L) - 2 (E)
    		Lock 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

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)