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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Key System (For Entry) - Diagnostic Codes & Symptom Tests (1 Of 2) >> SMART KEY SYSTEM (for Entry Function) >> Driver Side Door Entry Unlock Function does not Operate [12/2019 - 11/2023] >> Procedure

Driver Side Door Entry Unlock Function does not Operate [12/2019 - 11/2023]: Procedure

  1. CHECK POWER DOOR LOCK CONTROL SYSTEM 
    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.

      Refer to OPERATION CHECK [12/2019 - 11/2023]

      OK

      Door locks operate normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO POWER DOOR LOCK CONTROL SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023]

    Result: 

    OK 

    See step  2

  2. CHECK ENTRY OPERATION 
    1. Check that the entry unlock function.
      1. Turn the ignition switch off.
        GTY941342Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Unlock Sensor (Backside)
      2. Open and close the driver door.
      3. With the electrical key transmitter sub-assembly outside of the vehicle, press the lock switch of the electrical key transmitter sub-assembly to lock all of the doors.
      4. Hold the electrical key transmitter sub-assembly at the same height as the door outside handle assembly and approximately 0.3 m (0.984 ft.) from the driver door.
      5. Check that the LED of the electrical key transmitter sub-assembly blinks.
      6. Touch the unlock sensor on the backside of the front door outside handle assembly (for driver door) for 2 seconds or more.*
        1. *: Perform this step 3 seconds or more after performing step (3).

        HINT: 

        When checking the operation of the unlock sensor again, make sure to perform the procedure from step (1).

      Result

      Result Proceed to
      Entry function does not operate normally A
      Entry function operates normally B

    Result: 

    B 

    GO TO CHECK FOR INTERMITTENT PROBLEMS (OPERATION HISTORY) 

    for HV Model: Refer to CHECK FOR INTERMITTENT PROBLEMS [12/2019 - 11/2023]

    for Gasoline Model: Refer to CHECK FOR INTERMITTENT PROBLEMS [12/2019 - 11/2023]

    Result: 

    A 

    See step  3

  3. READ VALUE USING GTS (FL DOOR LOCK POS) 
    1. Read the Data List according to the display on the GTS.

      Body Electrical > Main Body > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FL Door Lock Pos Front door LH unlock detection switch signal UNLOCK or LOCK UNLOCK: Front door LH unlocked
      LOCK: Front door LH locked      		 -

      Body Electrical > Main Body > Data List 

      Tester Display
      FL Door Lock Pos

      OK

      The GTS display changes correctly in response to the lock/unlock operation of the driver door.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit) 

    Refer to Door Unlock Detection Switch Circuit [12/2019 - 11/2023]

    Result: 

    OK 

    See step  4

  4. READ VALUE USING GTS (D-DOOR TOUCH SENSOR) 
    1. Open and close the driver door.
      GTY941342Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Unlock Sensor (Backside)
    2. With the electrical key transmitter sub-assembly outside of the vehicle, press the lock switch of the electrical key transmitter sub-assembly to lock all of the doors.
    3. Hold the electrical key transmitter sub-assembly at the same height as the door outside handle assembly and approximately 0.3 m (0.984 ft.) from the driver door.
    4. Check that the LED of the electrical key transmitter sub-assembly blinks.
    5. Read the Data List according to the display on the GTS.
    6. Touch the unlock sensor on the backside of the front door outside handle assembly (for driver door) for 2 seconds or more.*
      1. *: Perform this step 3 seconds or more after performing step (f).

      HINT: 

      When checking the operation of the unlock sensor again, make sure to perform the procedure from step (a).

      Body Electrical > Smart Key > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      D-Door Touch Sensor Driver door touch sensor (unlock sensor) OFF or ON OFF: Driver door touch sensor (unlock sensor) not touched
      ON: Driver door touch sensor (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.

      Body Electrical > Smart Key > Data List 

      Tester Display
      D-Door Touch Sensor

      OK

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

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

    Refer to REMOVAL [12/2019 - 11/2023]

    Result: 

    NG 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR)) 
    1. Disconnect the M5 certification ECU (smart key ECU assembly) connector.
    2. Disconnect the J25 front door outside handle assembly (for driver door) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      M5-17 (CLG1) - J25-6 (ANT1) Always Below 1 Ω
      M5-16 (CG1B) - J25-4 (ANT2) Always Below 1 Ω
      M5-17 (CLG1) or J25-6 (ANT1) - Other terminals and body ground Always 10 kΩ or higher
      M5-16 (CG1B) or J25-4 (ANT2) - Other terminals and body ground Always 10 kΩ or higher
    4. Reconnect the J25 front door outside handle assembly (for driver door) connector.
    5. Reconnect the M5 certification ECU (smart key ECU assembly) connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. READ VALUE USING GTS (D-DOOR TOUCH SENSOR) 
    1. Open and close the driver door.
      GTY941342Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Unlock Sensor (Backside)
    2. With the electrical key transmitter sub-assembly outside of the vehicle, press the lock switch of the electrical key transmitter sub-assembly to lock all of the doors.
    3. Hold the electrical key transmitter sub-assembly at the same height as the door outside handle assembly and approximately 0.3 m (0.984 ft.) from the driver door.
    4. Check that the LED of the electrical key transmitter sub-assembly blinks.
    5. Read the Data List according to the display on the GTS.
    6. Touch the unlock sensor on the backside of the front door outside handle assembly (for driver door) for 2 seconds or more.*
      1. *: Perform this step 3 seconds or more after performing step (g).

      HINT: 

      When checking the operation of the unlock sensor again, make sure to perform the procedure from step (a).

      Body Electrical > Smart Key > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      D-Door Touch Sensor Driver door touch sensor (unlock sensor) OFF or ON OFF: Driver door touch sensor (unlock sensor) not touched
      ON: Driver door touch sensor (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.

      Body Electrical > Smart Key > Data List 

      Tester Display
      D-Door Touch Sensor

      OK

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

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (CONNECTOR WAS NOT CONNECTED SECURELY) 

    Result: 

    NG 

    REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR) 

    Refer to DISASSEMBLY [12/2019 - 10/2022] , or refer to DISASSEMBLY [10/2022 - 11/2023]

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