ENTRY AND START SYSTEM (for Entry Function) > Driver Side Door Entry Lock and Unlock Functions do not Operate

for Preparation Click here


DESCRIPTION

If the entry lock and unlock functions do not operate for the driver door only, the request code may not be being transmitted from the driver door or the front door outside handle assembly (for driver door) (touch sensor) may be malfunctioning. If the entry functions for other doors operate properly, communication between the key and door control receiver is normal. In this case, there may be a problem with request code transmission (communication between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door) [driver door electrical key antenna]), or there may be wave interference.

WIRING DIAGRAM


B249951E46


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 LHD
    1. *2: for RHD

    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.CHECK ELECTRICAL KEY ANTENNAS IN KEY DIAGNOSTIC MODE


  1. Check the following antennas in the key diagnostic mode (Click here).

    OK:
    Entry function operates normally.



      B265885E01

    1. Check the electrical key antenna (for driver door):
      Text in Illustration 
      *a
      		0.7 to 1 m (2.30 to 3.28 ft.)
      When the electrical key transmitter is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the front door outside handle assembly (for driver door), check that the wireless door lock buzzer sounds.



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 O1*1, N1*2 front door outside handle assembly (for driver 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
    O1-3 (ANT2) - H1-4 (CG1B)
    		Always
    		Below 1 Ω
    O1-6 (ANT1) - H1-3 (CLG1)
    		Always
    		Below 1 Ω
    O1-5 (B) - H1-32 (POS1)
    		Always
    		Below 1 Ω
    O1-2 (GND) - Body ground
    		Always
    		Below 1 Ω
    O1-3 (ANT2) or H1-4 (CG1B) - Body ground
    		Always
    		10 kΩ or higher
    O1-6 (ANT1) or H1-3 (CLG1) - Body ground
    		Always
    		10 kΩ or higher
    O1-5 (B) or H1-32 (POS1) - Body ground
    		Always
    		10 kΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    N1-3 (ANT2) - H1-4 (CG1B)
    		Always
    		Below 1 Ω
    N1-6 (ANT1) - H1-3 (CLG1)
    		Always
    		Below 1 Ω
    N1-5 (B) - H1-32 (POS1)
    		Always
    		Below 1 Ω
    N1-2 (GND) - Body ground
    		Always
    		Below 1 Ω
    N1-3 (ANT2) or H1-4 (CG1B) - Body ground
    		Always
    		10 kΩ or higher
    N1-6 (ANT1) or H1-3 (CLG1) - Body ground
    		Always
    		10 kΩ or higher
    N1-5 (B) or H1-32 (POS1) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO DRIVER DOOR ELECTRICAL KEY ANTENNA)


    B250975E01

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

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

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

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

    Standard Voltage:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    O1-5 (B) - Body ground
    		Power switch off → on (IG)
    		9 to 12 V → Below 2 V
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    N1-5 (B) - Body ground
    		Power switch off → on (IG)
    		9 to 12 V → Below 2 V

  1. Using an oscilloscope, check the waveform.

    OK:

    Tester Connection
    		Switch Condition
    		Tool Setting
    		Specified Condition
    O1-3 (ANT2) - O1-6 (ANT1)
    		Procedure:
    1. Power switch off
    2. Key brought outside vehicle
    3. All doors closed
    4. Key not inside vehicle
    5. All doors locked through wireless operation
    		2 V/DIV., 500 ms/DIV.
    		Pulse generation (See waveform)

Text in Illustration 
*1
Waveform
*a
Front view of wire harness connector
(to Front Door Outside Handle Assembly (for Driver Door))


NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK


6.REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR)

  1. Temporarily replace the front door outside handle assembly (for driver door) with a new or normally functioning one (Click here).


NEXT


7.CHECK FRONT DOOR OUTSIDE HANDLE ASSEMBLY (OPERATION)

  1. Check that the entry functions operate normally (Click here).

    OK:
    Entry functions operate normally.



NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK

END (FRONT DOOR OUTSIDE HANDLE ASSEMBLY WAS DEFECTIVE)