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

DESCRIPTION

If the driver side door entry unlock function does not operate but the entry lock function operates, the communication between the vehicle and electrical key transmitter sub-assembly is normal. The malfunctioning part may be the unlock sensor circuit (from certification ECU (smart key ECU assembly) to the front door outside handle assembly (for driver side electrical key antenna)).

WIRING DIAGRAM

A004K3IE05

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the engine switch off to troubleshoot:

    Connect the GTS to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the GTS and vehicle begins.

  • 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.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) Click here.

  • Check that there are no electrical key transmitter sub-assemblies in the vehicle.

  • After repair, confirm DTC does not reoccur by performing the "DTC Output Confirmation Operation".

  • When checking the entry lock operation multiple times, the lock operation may be limited to 2 consecutive operations depending on the settings. In order to perform the entry lock operation 3 or more times, an unlock operation must be performed once (any type of unlock operation is sufficient). However, only consecutive entry lock operations are limited. Using the wireless lock or other types of lock operations, it is possible to perform consecutive lock operations without this limitation.

PROCEDURE


  1. CHECK POWER DOOR LOCK OPERATION


    1. When the door control switch on the power window regulator 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

  2. READ VALUE USING GTS (D-DOOR LOCK POS SW)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. According to the display on the GTS, read the Data List.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D-Door Lock Pos SW Driver side door unlock detection switch signal / LOCK or UNLOCK

      LOCK: Driver side door locked

      UNLOCK: Driver side door unlocked

      		 -
      OK
      On the GTS screen, the display changes between ON and OFF as shown in the table above.

    NG

    GO TO LIGHTING SYSTEM (PROCEED TO DOOR UNLOCK DETECTION SWITCH CIRCUIT) Click here

    OK

  3. READ VALUE USING GTS (D-DOOR TOUCH SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      Entry & Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D-Door Touch Sensor Front door outside handle assembly (for driver side) (lock sensor) / OFF or ON

      OFF: Front door outside handle assembly (for driver side) (unlock sensor) not touched

      ON: Front door outside handle assembly (for driver side) (unlock sensor) touched

      • Displays whether the unlock 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 an unlock sensor malfunction when the entry unlock function does not operate.
      OK
      On the GTS screen, the display changes between ON and OFF as shown in the table above.

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

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


    1. Disconnect the D41and D48 certification ECU (smart key ECU assembly) connectors.

    2. Disconnect the E1*1 or F5*2 front door outside handle assembly connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      D41-22 (SEN1) - E1-4 (SENS) Always Below 1 Ω
      D48-11 (GND) - Body ground Always Below 1 Ω
      D41-22 (SEN1) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      D41-22 (SEN1) - F5-4 (SENS) Always Below 1 Ω
      D48-11 (GND) - Body ground Always Below 1 Ω
      D41-22 (SEN1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER SIDE DOOR)


    1. Reconnect the D41 and D48 certification ECU (smart key ECU assembly) connectors.

    2. Reconnect the E1*1 or F5*2 front door outside handle assembly (for driver side door) connector.


      • *1: for LHD

      • *2: for RHD

    3. Using an oscilloscope, check the waveform.

      A004KEVE02
      Text in Illustration
      *a

      Component with harness connected

      (Certification ECU (smart key ECU assembly))

      		 *b Waveform
      *c In actuality, sampling is being performed - -
      OK
      Tester Connection Switch Condition Tool Setting Specified Condition
      D41-22 (SEN1) - D48-11 (GND)

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly brought outside vehicle

      3. All doors locked

      4. Electrical key transmitter sub-assembly not sufficiently close to vehicle

      5. Driver side door unlock sensor not touched → touched

      		 2 V/DIV., 500 ms/DIV

      Pulse generation

      (See waveform)

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

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