Door Control Transmitter: Inspection

INSPECT TRANSMITTER BATTERY

Inspect operation of the transmitter
1. Remove the battery (lithium battery) from the transmitter (see REMOVAL ).
  
  Fig 1: Inspecting Operation Of Transmitter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Install a new or normal battery (lithium battery).
  HINT:
  
  If a new or normal battery is not available, first connect 2 new 15V 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 key plate at the vehicle and pressing a transmitter switch
  
  Fig 2: Connecting Leads To Batteries And Transmitter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: The door lock can be operated via the transmitter.
  
  The LED comes on more than once.
  
  HINT:
  - The operational area 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 operational area may be shortened or the transmitter may not function

Inspect the battery capacity

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 (see REMOVAL ).
NOTE: Do not wrap the lead wire around a terminal, wedge it between terminals, or solder it. A terminal may be deformed or damaged, and the battery will not be able to be installed correctly.
Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery

Fig 3: Identifying Electrical Key Transmitter
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an oscilloscope, check the transmitter battery voltage waveform.

HINT:

When measuring the battery voltage, while operating the lock switch of a door handle, bring the electrical key transmitter within the smart access system operating range to perform the measurement. For the smart access system operating range, refer to SYSTEM DESCRIPTION .

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

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

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

INSPECT TRANSMITTER BATTERY (for Card Type)

Inspect operation of the transmitter
1. Remove the battery (lithium battery) from the transmitter (see REMOVAL )
  
  Fig 4: Checking Transmitter Battery Voltage Waveform
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Install a new or normal battery (lithium battery)
  HINT:
  
  If a new or normal battery is not available, first connect 2 new 15V batteries in series. Then connect leads to the batteries and apply 3 V to the transmitter, as shown in the illustration.
3. Hold the card key in the smart access system operating range, and operate the entry lock and unlock switch of the door handle.
  OK: Door can be locked and unlocked.
  NOTE:
  - Make sure the power switch is OFF.
  - Make sure to close all doors.
  - Do not wedge the tip of the tester lead between terminals, as a terminal may be deformed or damaged.
    
    Fig 5: Connecting Leads To Batteries And Transmitter
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Inspect the battery capacity

Remove the battery from the card key that does not operate Attach a lead wire to the negative and positive side of the battery with tape or equivalent (see REMOVAL ).
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.

Using an oscilloscope, check the transmitter battery voltage waveform

HINT:

When measuring the battery voltage, while operating the lock switch of a door handle, bring the card key within the smart access system with push-button start operating range to perform the measurement For the smart access system with push-button start operating range, refer to SYSTEM DESCRIPTION .

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

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

Fig 6: Checking Transmitter Battery Voltage Waveform

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

NOTE: Before measuring the battery voltage, make sure that the positive side of the battery is set towards the LEXUS mark side.