You can switch the second key into sleep mode:
The battery-saving function will be activated
in order to prevent the electronic key
battery and the 12-volt battery from being
discharged while the vehicle is not in operation
for a long time.
● In the following situations, the smart entry
& start system may take some time to
unlock the doors.
• The electronic key has been left in an
area of approximately 3.5 m (11.5 ft.) of
the outside of the vehicle for 40 seconds
or longer.
• The smart entry & start system has not
been used for 5 days or longer.
● If the smart entry & start system has not
been used for 14 days or longer, the
doors cannot be unlocked at any doors
except the driver’s door. In this case, take
hold of the driver’s door handle, or use
the wireless remote control or the
mechanical key, to unlock the doors.
■ Turning an electronic key to battery saving
mode:
When battery-saving mode is set, battery
depletion is minimized by stopping the
electronic key from receiving radio
waves.
Press twice while pressing and
holding .
Confirm that the electronic key indicator
flashes 4 times.
While the battery-saving mode is set, the
smart entry & start system cannot be used.
To cancel the function, press any of the
electronic key buttons."