Toyota Corolla 2016 Owner's Manual page 105

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Operation signals
A buzzer sounds and the emergency flashers flash to indicate that the doors
have been locked/unlocked. (Locked: once; Unlocked: twice)
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Security feature
If a door is not opened within approximately 60 seconds after the vehicle is
unlocked, the security feature automatically locks the vehicle again.
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When the door cannot be locked by the lock sensor on the upper part of
the door handle
If the door will not lock even when the top-
side sensor area is touched, try using
your palm to touch the lock sensor.
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Door lock buzzer
If an attempt to lock the doors using the wireless remote control or smart key
system is made when a door is not fully closed, a buzzer will sound for 5 sec-
onds. Fully close the door, and lock the vehicle again.
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Setting the alarm (if equipped)
Locking the doors will set the alarm system. (→P. 68)
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If the smart key system or the wireless remote control does not operate
properly
Use the mechanical key to lock and unlock the doors. (→P. 535)
Replace the battery with a new one if it is depleted. (→P. 469)
3-2. Opening, closing and locking the doors
I n f o r ma t i o n P r o v i d e d b y :
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