TOYOTA 2011 FJ Cruiser - Manual (Page 419)

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4-3. Do-it-yourself maintenance
n If the key battery is discharged
The following symptoms may occur.
l The wireless remote control will not function properly.
l The operational range is reduced.
n Use a CR2016 lithium battery
l Batteries can be purchased at your Toyota dealer, jewelers, or camera
stores.
l Replace only with the same or equivalent type recommended by your
Toyota dealer.
l Dispose of used batteries according to the local laws.
CAUTION
n Removed battery and other parts
Keep away from children. These parts are small and if swallowed by a child,
they can cause choking. Failure to do so could result in death or serious
injury.
NOTICE
n For normal operation after replacing the battery
Observe the following precautions to prevent accidents.
l Always work with dry hands.
Moisture may cause the battery to rust.
l Do not touch or move any other components inside the remote control.
l Do not bend either of the battery terminals.