ENTRY AND START SYSTEM (for Entry Function) > Front Passenger Side Door Entry Unlock Function does not Operate

for Preparation Click here


DESCRIPTION

If the entry unlock function does not operate for the front passenger door only, but the entry lock function operates, the request code is being transmitted properly from the front passenger door. In this case, there may be a problem related to the touch sensor (connection between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for front passenger door) [unlock sensor]).

WIRING DIAGRAM


B249951E47


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.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 (DOOR LOCK POSITION SWITCH)

  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 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    FL Door Lock Pos*1
    		Front LH door lock position switch signal / UNLOCK or LOCK
    		UNLOCK: Front LH door unlocked
    LOCK: Front LH door locked
    		-
    FR Door Lock Pos*2
    		Front RH door lock position switch signal / UNLOCK or LOCK
    		UNLOCK: Front RH door unlocked
    LOCK: Front RH door locked
    		-

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

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



NG
GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit) (Click here)
OK


3.READ VALUE USING INTELLIGENT TESTER (UNLOCK SENSOR)

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

    Entry&Start 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    P-Door Touch Sensor
    		Front passenger door touch sensor (unlock sensor) / ON or OFF
    		ON: Front passenger door touch sensor (unlock sensor) touched
    OFF: Front passenger door touch sensor (unlock sensor) not touched
    1. Displays whether the unlock sensor is on or off (even if the sensor is touched and contact is maintained, "ON" is displayed only momentarily).
    2. Use this Data List item to help determine if there is an unlock sensor malfunction when the entry unlock function does not operate.

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



NG
Go to step 4
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

4.CHECK HARNESS AND CONNECTOR (FRONT DOOR OUTSIDE HANDLE - CERTIFICATION ECU)

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

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

    Standard Resistance:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    N1-4 (SENS) - H1-21 (SEN2)
    		Always
    		Below 1 Ω
    H1-15 (E) - Body ground
    		Always
    		Below 1 Ω
    N1-4 (SENS) or H1-21 (SEN2) - Body ground
    		Always
    		10 kΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    O1-4 (SENS) - H1-21 (SEN2)
    		Always
    		Below 1 Ω
    H1-15 (E) - Body ground
    		Always
    		Below 1 Ω
    O1-4 (SENS) or H1-21 (SEN2) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR FRONT PASSENGER DOOR) (FRONT PASSENGER DOOR UNLOCK SENSOR SIGNAL INPUT)


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


    C222741E27


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

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

  1. Using an oscilloscope, check the waveform.

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

    OK:

    Tester Connection
    		Switch Condition
    		Tool Setting
    		Specified Condition
    H1-21 (SEN2) - H1-15 (E)
    		Procedure:
    1. Power switch off
    2. Key brought outside vehicle
    3. All doors locked
    4. Key not sufficiently close to vehicle
    5. Front passenger door unlock sensor not touched → touched
    		2 V/DIV., 500 ms/DIV.
    		Pulse generation (See waveform)



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

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)