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Section 247 (Wireless Door Lock Control System (W/O Smart Key System) - Diagnosis): Inspection: Notes

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. WIRELESS DOOR LOCK DIAGNOSTIC MODE 
    1. Switch to self-diagnostic mode on the hand-held tester.

      HINT:

      This mode checks signal transmission/reception between the door control transmitter, door control receiver and theft warning ECU (theft deterrent ECU). If all of a customer's door control transmitters do not function, it is possible the door control transmitter(s) and/or wire harness is malfunctioning.

      1. Switch to self-diagnostic mode on the hand-held tester.
      2. Turn the ignition switch ON.
      3. Please refer to the hand-held tester operator manual for further details.

      HINT:

      Do not lock or unlock doors during self-diagnostic mode.

    2. Check that the system has switched to self-diagnostic mode by listening to the wireless door lock buzzer. The buzzer should sound according to the illustration on the left.
      Fig 1: Checking System Has Switched To Self-Diagnostic Mode By Listening To Wireless Door Lock Buzzer
      G01483899Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Inspect the diagnosis outputs when the door control transmitter switch is held down (the diagnosis outputs can be checked with the sound of the wireless door lock buzzer).
      Fig 2: Inspecting Diagnosis Outputs
      G01483900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      If "unmatching recognition code" or "no diagnosis output" is output, perform the inspections below.

      • Wireless door lock transmitter.
      • Door control receiver (inner mirror).
      • Wire harness between the door control receiver and theft warning ECU assy.
  2. INSPECTION TRANSMITTER SUB-ASSY MODULE SET DOOR CONTROL 
    1. Inspect operation of the transmitter.
      1. Remove the battery (lithium battery) from the transmitter (see REPLACEMENT ).
      2. Install a new or non-depleted battery (lithium battery).
        Fig 3: Inspecting Transmitter Sub-Assy Module Set Door Control
        G01483901Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        When a new or non-depleted battery is not available, first connect 2 new 105 batteries in series. Then connect leads to the batteries and use the leads to apply 3 V to the transmitter, as shown in the illustration.

      3. From outside the vehicle, approximately 1 m (3.28 ft) from the driver side outside door handle, test the transmitter by pointing its key plate at the vehicle and pressing a transmitter switch.

      OK: Go to next step. 

      The door lock can be operated via the transmitter The LED lights up more than once. 

      HINT:

      • The operational are differs depending on the user, the way the transmitter is held and the location.
      • The transmitter's faint electric waves may be affected if the area has strong electric waves or noise. The transmitter's operation area may be shortened or the transmitter may not function.
    2. Inspect the battery capacity.

      HINT:

      • When checking the amount of energy left in the battery (lithium battery), the battery must be checked while it is installed in the transmitter (a resistance of 1.2 kΩ is applied to the battery). when the battery energy is checked by itself (uninstalled), the voltage reading will be more than 2.5 V until the energy is depleted.
      • If the transmitter is malfunctioning, the voltage reading of the energy left in the battery will be inaccurate.
        1. remove the battery (lithium battery) from the transmitter (see REPLACEMENT ).
        2. Connect a wire to the negative (-) terminal of the transmitter and install the battery.
          Fig 4: Connecting A Wire To Negative (-) Terminal Of Transmitter
          G01483902Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        3. Connect the tester positive (+) lead to the (+) battery (lithium battery) and the tester negative (-) lead to the lead.
        4. Press one of the transmission switches on the transmitter for approximately 1 second.
        5. Press the transmission switch on the transmitter again to check the voltage.

          OK: 2.2 V or higher 

        Fig 5: Connecting Tester Positive (+) Lead To (+) Battery (Lithium Battery) And Tester Negative (-) Lead To Lead
        G01483903Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      • When the temperature of the battery is low, the inspection cannot be made correctly.

        When the outcome of the test is less than 2.2 V, conduct the test again after leaving the battery in a place with a temperature of 18 °C (64 °F) for more 30 minutes.

      • Read the voltage immediately after the switch is pressed. when 0.8 seconds have passed after the switch is pressed, the automatic power-off function starts and resistance applied to the battery will cease. The voltage of the battery will be 2.5 V or more.
      • Press the switch at least 3 times before reading the voltage.

        If the battery has just been returned to 18 °C (64 °F), the voltage may be unusually high for the first or second voltage reading.

  3. INSPECTION DOOR CONTROL RECEIVER (INNER MIRROR) 
    1. Disconnect the 119 receiver connector.
    2. Measure the resistance and voltage between the wire harness side connector and body ground.

      Standard: 

      Fig 6: Inspecting Door Control Receiver (Inner Mirror)
      G01483904Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 7: Identifying Terminals Voltage And Resistance Specification Table
      G01483905Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, repair or replace the wire harness and connector.

    3. Reconnect the 119 receiver connector.
    4. Measure the voltage between the terminal and body ground.

      Standard: 

      Fig 8: Identifying Terminals Voltage And Resistance Specification Table
      G01483906Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the door control receive

  4. INSPECT WIRELESS DOOR LOCK BUZZER 
    1. Disconnect the K1 buzzer connector.
    2. Measure the resistance of each terminal of the wire harness side connector and body ground.

      Standard: 

      Fig 9: Inspecting Wireless Door Lock Buzzer
      G01483907Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 10: Identifying Terminals Resistance Specification Table
      G01483908Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, repair or replace the wire harness and connector.

    3. Reconnect the K1 buzzer connector.
    4. Measure the resistance between terminals 1 and 3 of the buzzer.

      Standard: Approximately 1 kΩ 

    NOTE:
    • The buzzer circuit is built into the theft warning ECU, not into the buzzer itself.
    • When battery voltage is directly applied to the buzzer, the buzzer does not sound.

    If the result is not as specified, replace the door control receiver.

  5. INSPECT WIRELESS DOOR BUZZER CONTROLLER 
    1. Measure the resistance between terminals 1 and 2 of the buzzer controller.

      Standard: 

      Fig 11: Inspecting Wireless Door Buzzer Controller
      G01483909Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 12: Identifying Terminals Resistance Specification Table
      G01483910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the wireless door lock buzzer controller.

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