DOOR CONTROL TRANSMITTER INSPECTION


  1. INSPECT ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY


    1. Inspect the operation of the transmitter.


      1. Remove the battery (lithium battery) from the transmitter Click here.

        Note

        When replacing the transmitter battery, before starting work, remove static electricity that has built up in the body by touching, for example, the vehicle to prevent the electrical transmitter from being damaged.

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        Install a new or known good battery (lithium battery).

        Tech Tips

        If a new or known good battery is not available, first connect 2 new 1.5 V batteries in series. Then connect leads to the batteries and apply 3 V to the transmitter, as shown in the illustration.

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

        OK
        The door locks can be operated via the transmitter.
        The LED comes on more than once.

        • The size of the operational area differs depending on the user, the way the transmitter is held, and the location of the vehicle.

        • The transmitter's faint radio waves may be affected if the area has strong radio waves or electrical noise. The size of the transmitter's operation area may be reduced or the transmitter may not function.

    2. Inspect the battery capacity.


      1. Remove the battery from the electrical key transmitter that does not operate. Attach a lead wire (0.6 mm (0.0236 in.) in diameter or less including wire sheath) with tape or equivalent to the negative (-) terminal.

        Note

        Do not wrap the lead wire around a terminal, wedge it between the terminals, or solder it. A terminal may be deformed or damaged, and the battery will not be able to be installed correctly.

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        Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery Click here.

        Note

        When replacing the transmitter battery, before starting work, remove static electricity that has built up in the body by touching, for example, the vehicle to prevent the electrical transmitter from being damaged.

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        Text in Illustration
        *a Measurement Position

        Using an oscilloscope, check the transmitter battery voltage waveform.

        Tech Tips

        When measuring the battery voltage, while operating the lock switch of a door handle, bring the electrical key transmitter within the entry operating range to perform the measurement. For the entry operating range, refer to System Description Click here.

        Standard Voltage
        Item Content
        Tester Connection Battery positive (+) - Battery negative (-)
        Tool Setting 0.5 V/DIV., 100 ms./DIV.
        Condition Power switch off, all doors closed and lock switch pushed
        Specified Condition 2.2 to 3.2 V (Refer to the waveform)

        If the result is not as specified, replace the transmitter battery.