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

for Preparation Click here

DESCRIPTION

WIRING DIAGRAM

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 performing the inspection, check that DTC B1242 (wireless door lock control) is not output (Click here).
   
5. Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) (Click here).
   

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

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

   Entry & Start 

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   D-Door Trigger Switch	Driver door touch sensor (lock sensor) / ON or OFF	ON: Driver door touch sensor (lock sensor) touched OFF: Driver door touch sensor (lock sensor) not touched	Displays whether the lock sensor is on or off (even if the sensor is touched and contact is maintained, "ON" is displayed only momentarily). Use this Data List item to help determine if there is a lock sensor malfunction when the entry lock function does not operate.

   OK:

   The intelligent tester display changes correctly in response to the operation of the front door outside handle assembly (for driver door).
   

NG	Go to step 3

OK
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

1. Disconnect the O1*1, N1*2 front door outside handle assembly (for driver door) connector.
   

2. Disconnect the H1 certification ECU (smart key ECU assembly) connector.
   

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

   1. *1: for LHD
      
   2. *2: for RHD
      
   
   

   Standard Resistance:

   for LHD 

   Tester Connection	Condition	Specified Condition
   O1-1 (TRG+) - H1-18 (TSW1)	Always	Below 1 Ω
   H1-15 (E) - Body ground	Always	Below 1 Ω
   O1-1 (TRG+) or H1-18 (TSW1) - Body ground	Always	10 kΩ or higher

   for RHD 

   Tester Connection	Condition	Specified Condition
   N1-1 (TRG+) - H1-18 (TSW1)	Always	Below 1 Ω
   H1-15 (E) - Body ground	Always	Below 1 Ω
   N1-1 (TRG+) or H1-18 (TSW1) - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Connect the O1*1, N1*2 front door outside handle assembly (for driver door) connector.
   

   
   
   
   
   

   Text in Illustration 

   *1	Waveform	-	-
   *a	Component with harness connected (Certification ECU (Smart Key ECU Assembly))	*b	In actuality, sampling is being performed

2. Connect the H1 certification ECU (smart key ECU assembly) connector.
   

3. Using an oscilloscope, check the waveform.
   

   1. *1: for LHD
      
   2. *2: for RHD
      
   
   

   OK:

   
   

   Tester Connection	Switch Condition	Tool Setting	Specified Condition
   H1-18 (TSW1) - H1-15 (E)	Procedure: Power switch off Key brought outside vehicle All doors closed Driver door lock sensor not touched → touched	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveform)

NG	REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR) (Click here)

OK
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)