LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2018 >> 4Runner TRD Pro >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Key System (For Entry Function) - Diagnostics - Introduction (2 Of 2) >> SMART KEY SYSTEM (for Entry Function) >> Operation Check [08/2022 - ] >> Operation Check [08/2022 - ]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Operation Check [08/2022 - ]

  1. CHECK SMART KEY SYSTEM (for Entry Function) OPERATION 
    NOTE:

    Make sure that the smart key system (for Entry Function) has not been canceled before performing this inspection.

    1. Check the entry unlock function (driver door, front passenger door).
      1. Perform a wireless lock operation to lock the door, touch the unlock sensor built into the backside of the front door outside handle assembly of the driver door while carrying the electrical key transmitter sub-assembly and check that the door unlocks.
      2. Inspect the entry unlock detection area. Hold the electrical key transmitter sub-assembly at the same height as the front door outside handle assembly and approximately 0.7 to 1 m (2.30 to 3.28 ft.) from the vehicle as shown in the illustration and check that the LED (red) of the electrical key transmitter sub-assembly blinks.
        Fig 1: Electrical Key Antenna
        GTY853700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a 0.7 to 1 m (2.30 to 3.28 ft.)
      3. With the system in unlock standby mode, grasp the front door outside handle assembly and check that the door unlocks.

        HINT: 

        • The system is in unlock standby mode when the electrical key transmitter sub-assembly is in the detection area and the key ID code sent by the electrical key transmitter sub-assembly matches the key ID code stored by the certification ECU (smart key ECU assembly).
        • Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the front door outside handle assembly.
        • Inspect the front passenger door using the same procedure.
      4. Check the unlock response sensitivity. With the system in unlock standby mode, touch the area shown in the illustration and check that the door unlocks.
        NOTE:

        If the sensor is touched too quickly or released too slowly, the sensor may not react and the door will not unlock.

        Fig 2: Unlock Sensor (Backside)
        GTY470674Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Unlock Sensor (Backside)
    2. Check the entry lock function (driver door, front passenger door).
      NOTE:

      If the electrical key transmitter sub-assembly is in the vehicle but outside the detection area (on the instrument panel, in the glove box, on the floor) and a door lock operation is performed, the key lock-in prevention function will not operate and the electrical key transmitter sub-assembly will be locked inside the vehicle.

      Fig 3: Lock Sensor
      GTY911988Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Lock Sensor
      1. With the door closed and unlocked, touch the lock sensor of the front door outside handle assembly of the driver door while carrying the electrical key transmitter sub-assembly and check that the door locks.

        HINT: 

        If the door does not lock even when touching the lock sensor, touch it with your palm.

      2. Inspect the entry lock operating range. Hold the electrical key transmitter sub-assembly approximately 0.1 m (0.328 ft.) below the bottom edge of the door glass and approximately 0.3 m (0.984 ft.) from the vehicle as shown in the illustration, touch the lock sensor and check that the door locks.

        HINT: 

        • If the door does not lock even when touching the lock sensor, touch it with your palm.
        • As communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the front door outside handle assembly, the door may not lock if the lock sensor is touched with the same hand that is carrying the electrical key transmitter sub-assembly, etc.
        • If the key lock-in prevention function buzzer sounds, radio waves from the indoor electrical key antenna may be leaking from the vehicle.
        • Inspect the front passenger door using the same procedure.
        • The door lock operation cannot be performed more than 3 times consecutively.
        Fig 4: Electrical Key Antenna
        GTY853700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Approximately 0.3 m (0.984 ft.)
    3. Check the entry back door lock function.
      1. Step 1: Close all of the vehicle doors. With the key in your possession outside of the vehicle, check that pressing the back door lock switch locks all the doors.
        Fig 5: Entry Back Door Lock
        GTY868982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Approximately 0.3 m (0.984 ft.)

        HINT: 

        • When pressing the lock switch, hold the electrical key transmitter approximately 1 m (3.28 ft.) above the ground and approximately 0.3 m (0.984 ft.) away from the vehicle as shown in the illustration.
        • Due to the key being unable to communicate with the system within a 0.2 m (0.656 ft.) radius from the rear of the vehicle, do not press the back door lock switch with the same hand that is holding the key. The doors may not lock.
        • If the key lock-in prevention function buzzer sounds, radio waves from the indoor electrical key antenna may be leaking from the vehicle.
    4. Check the entry back door unlock function.
      1. Lock all the doors and the back door. With the key in your possession, check that pressing the unlock switch on the back door control switch or the back door opener switch unlocks all the doors and the back door.
        Fig 6: Entry Back Door Lock
        GTY868982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a 0.7 to 1 m (2.30 to 3.28 ft.)
      2. Inspect the detection area of the entry back door unlock operation. Hold the key at the same height as the back door control switch (approximately 0.8 m [2.62 ft.]) Pay attention to the direction of the key shown in the illustration. Check that the when the key is brought within 0.7 to 1.0 m (2.30 to 3.28 ft.) of the vehicle, pressing the unlock switch on the back door control switch or the back door opener switch unlocks all the doors and the back door.
    5. Check the push start function.
      1. With the engine switch off, move the shift lever to P, depress the brake pedal while carrying the electrical key transmitter sub-assembly. Then, press the engine switch and check that the engine starts.
      2. With the brake pedal released and the engine switch off, press the engine switch while carrying the electrical key transmitter sub-assembly and check that the power source mode changes as follows: off → on (ACC) → on (IG) → off.

        When the engine switch is pressed with the engine switch on (IG) and the shift lever not in P, the power source mode does not change to off, but changes to on (ACC).

      3. Stop the vehicle, press the engine switch and check that the power source mode changes to off (the engine stops and all electrical systems are off).

        When the engine switch is pressed after the vehicle is stopped, the engine stops and all the power turns off. However, if the shift lever is not in P when the engine switch is pressed with the vehicle stopped, the power source mode does not change to off, but changes to on (ACC).

      4. Inspect the push-button start operating range (front floor). Place the electrical key transmitter sub-assembly on the front seat at either inspection point so that it is facing in the direction shown in the illustration and check that the engine can be started.
        Fig 7: Electrical Key Antenna
        GTY864414Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Inspection Point
        NOTE:

        Even if the electrical key transmitter sub-assembly is within the vehicle interior detection area, the electrical key transmitter sub-assembly may not be properly detected if it is on the instrument panel, in the glove box or on the floor.

        HINT: 

        • Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the shift lever.
        • Perform the inspection for both inspection points.
      5. Inspect the push-button start operating range (rear floor). Place the key on the rear seat at either inspection point so that it is facing in the direction shown in the illustration and check that the engine can be started.
        Fig 8: Electrical Key Antenna
        GTY880128Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Inspection Point
        NOTE:

        Even if the key is within the vehicle interior detection area, the key may not be properly detected if it is on the instrument panel, in the glove box or on the floor.

        HINT: 

        • Communication may not be possible if the key is within 0.2 m (0.656 ft.) of the center of the rear seat cushion.
        • Perform the inspection for both inspection points.
      6. Inspect the detection area of the entry ignition operation (luggage room). Pay attention to the direction of the key in the illustration. When the key is in either of the 2 locations in the illustration, check that the engine control system can be started. Then repeat the check with the key in the other location.
        Fig 9: Electrical Key Antenna
        GTY870745Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *A w/ Rear No. 2 Seat Assembly *B w/o Rear No. 2 Seat Assembly
        *a Inspection Point - -
        NOTE:

        The engine control system cannot be started when the key is on the instrument panel or in the glove box.

    6. Check the key lock-in prevention function.
      NOTE:

      In order to prevent the electrical key transmitter sub-assembly from being locked inside the vehicle, perform this inspection with the window of a door open.

      1. Turn the engine switch off.
      2. Place the electrical key transmitter sub-assembly on a front seat, rear seat or luggage compartment.
      3. Close the door, making sure the doors are unlocked.
      4. Touch a door lock sensor and check that the doors do not lock and the key lock-in prevention function buzzer (external) sounds for approximately 5 seconds.
    7. Check the transmitter battery saving function
      1. Press the unlock switch of the electrical key transmitter sub-assembly twice while pressing the lock switch and check that the electrical key transmitter sub-assembly LED blinks 4 times and enters transmitter battery saving mode.
      2. Check that the smart key system (for Entry Function) does not operate while in transmitter battery saving mode.

        HINT: 

        To cancel transmitter battery saving mode, press a switch of the electrical key transmitter sub-assembly.

    8. Check the entry cancel function.
      1. Cancel the smart key system and check that all the functions of the smart key system (for Entry Function) no longer operate.

        Refer to CUSTOMIZE PARAMETERS [08/2019 - ] 

        HINT: 

        While the smart key system is canceled, it is possible to lock and unlock the doors with the wireless operation, and the start system can be operated by holding the electrical key transmitter sub-assembly near the engine switch.

    9. Check the answer-back function (hazard warning light flashing and buzzer sounding).
      Entry Operation Hazard Warning Light Wireless Buzzer
      Entry Lock Flashes once Sounds once
      Entry Unlock Flashes twice Sounds twice
      Entry Back Door Lock Flashes once Sounds once
      Entry Back Door Unlock Flashes twice Sounds twice
  2. KEY DIAGNOSTIC MODE (USING Techstream) 

    HINT: 

    • With key diagnostic mode, it is possible to check if the electrical key transmitter sub-assembly is operating properly with the selected electrical key antenna and within the selected detection area by the sounding of the wireless buzzer.
    • If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
    1. Enter the following menus: Body Electrical / Smart Key / Utility / Communication Check (Key Diag Mode).
    2. Inspect the appropriate item according to the following table.
      Tester Display Inspection Item
      [CH1/CH2] Overhead + Driver Side*1 Front door outside handle assembly LH (electrical key antenna) (for Driver Side)
      [CH1] Overhead + Driver Side*1
      [CH2] Overhead + Driver Side*1
      [CH1/CH2] Overhead + Passenger Side*2 Front door outside handle assembly RH (electrical key antenna) (for Front Passenger Door)
      [CH1] Overhead + Passenger Side*2
      [CH2] Overhead + Passenger Side*2
      [CH1/CH2] Overhead + Front Room*3 No. 2 indoor electrical key antenna assembly (front floor)
      [CH1] Overhead + Front Room*3
      [CH2] Overhead + Front Room*3
      [CH1/CH2] Overhead + Rear Room*4 Indoor electrical key antenna (rear floor)
      [CH1] Overhead + Rear Room*4
      [CH2] Overhead + Rear Room*4
      [CH1/CH2] Overhead + Luggage*5 Electrical key antenna (outside luggage compartment)
      [CH1] Overhead + Luggage*5
      [CH2] Overhead + Luggage*5
      [CH1/CH2] Luggage + Back Door (inside)*6 No. 1 indoor electrical key antenna assembly (inside luggage)
      [CH1] Luggage + Back Door (inside)*6
      [CH2] Luggage + Back Door (inside)*6
      [CH1/CH2] Immobiliser Amp*7 Amplifier (engine switch)
      [CH1] Immobiliser Amp*7
      [CH2] Immobiliser Amp*7
      • [CH1]: Channel 1 is set.
      • [CH2]: Channel 2 is set.
      • [CH1/CH2]: Channel 1 and 2 switch automatically at a specific interval*.

        *: If the electrical key transmitter sub-assembly is detected with either channel 1 or 2, the buzzer sounds.

    3. Bring the electrical key transmitter sub-assembly near the selected electrical key antenna and check that the wireless buzzer sounds.
      1. *1: Front door outside handle assembly (for Driver Side)
        Fig 10: Electrical Key Antenna
        GTY853700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a 0.7 to 1 m (2.30 to 3.28 ft.)

        HINT: 

        • Hold the electrical key transmitter sub-assembly at the same height as the front door outside handle assembly in the position shown in the illustration.
        • *2: Perform the same inspection for the front passenger side.
    4. *3: No. 2 indoor electrical key antenna assembly (front floor)
      Fig 11: Electrical Key Antenna
      GTY864414Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Inspection Point

      HINT: 

      Place the electrical key transmitter sub-assembly on the front seat cushion of the driver seat or front passenger seat.

    5. *4: Indoor electrical key antenna (rear floor)
      Fig 12: Electrical Key Antenna
      GTY880128Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Inspection Point

      HINT: 

      Place the electrical key transmitter sub-assembly on the rear seat cushion.

    6. *6: No. 1 indoor electrical key antenna assembly (inside luggage)
      Fig 13: Electrical Key Antenna
      GTY870745Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Rear No. 2 Seat Assembly *B w/o Rear No. 2 Seat Assembly
      *a Inspection Point - -

      HINT: 

      Place the electrical key transmitter sub-assembly in the luggage compartment.

    7. *5: Electrical key antenna (back door)
      Fig 14: Entry Back Door Lock
      GTY868982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 0.7 to 1 m (2.30 to 3.28 ft.)

      HINT: 

      Hold the electrical key transmitter sub-assembly at the same height as the rear bumper upper surface and align it with the center of the rear of the vehicle, as shown in the illustration.

    8. *7: Amplifier (engine switch)
      Fig 15: Electrical Key Antenna
      GTY914016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Engine Switch
      *2 Electrical Key Transmitter Sub-assembly

      HINT: 

      While facing the logo side of the electrical key transmitter sub-assembly towards the engine switch, hold the transmitter near the engine switch.

scientia non olet · About LEMON Manuals