Keyless Entry Transmitter Battery: Testing and Inspection

TRANSMITTER BATTERY INSPECTION

NOTE:
- If the battery is not subject to load, it cannot be properly inspected.
- Because there is a surge of voltage when the transmitter button is first pushed, be sure to push the button at least 10 times before inspecting.
- Since a correct measurement cannot be obtained if the battery temperature is under 18 °C {64 °F}, make sure the battery has been at 18 °C {64 °F} or more for at least 30 minutes before inspecting.
- There is an auto power off function in the transmitter, so be sure to read the voltage within 0.5 seconds after pushing the button.
- If the transmitter is malfunctioning, the battery cannot be properly inspected.

1. Remove the transmitter back cover.




2. Connect the positive (+) lead of the voltmeter to the battery of the transmitter and negative (-) lead to the negative (-) terminal.
3. Push any button of transmitter 10 times or more for about a second each time then read the voltage within 0.5 seconds after pushing the button a final time.
4. Push any button of the transmitter again and measure the minimum voltage.
- If not as specified, replace the transmitter battery.
- If the keyless entry system does not operate even though the voltage is as specified, the transmitter may be malfunctioning. Perform the following inspection on the transmitter:
a. Get a transmitter known to be good.
b. Put the suspect battery into the good transmitter.
c. Perform Steps 2 to 4.

- If voltage is not as specified, replace battery. If voltage is as specified, replace the transmitter.

Standard voltage: 2.7 V or more