Keyless Entry Transmitter: Testing and Inspection

DOOR LOCK: DOOR CONTROL TRANSMITTER: INSPECTION

1. INSPECT TRANSMITTER BATTERY

NOTICE:
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.

(a) Inspect operation of the transmitter.

(1) Remove the battery (lithium battery) from the transmitter Removal.

(2) Install a new or normal battery (lithium battery).





HINT
If a new or normal 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 key plate at the vehicle and pressing a transmitter switch.

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.

(b) 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 Removal.

NOTICE:
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.

(2) Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.

(3) 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 System Description.

Standard voltage:





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

2. INSPECT TRANSMITTER BATTERY (for Card Type)

NOTICE:
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.

(a) Inspect operation of the transmitter.

(1) Remove the battery (lithium battery) from the transmitter Removal.

(2) Install a new or normal battery (lithium battery).





HINT
If a new or normal 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) 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.

NOTICE:
* 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.

(b) Inspect the battery capacity.

(1) 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 Removal.

NOTICE:
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.

(2) 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 System Description.

Standard voltage:





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

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