TOYOTA 2012 Avalon - Manual (Page 483)

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5-2. Steps to take in an emergency
If the electronic key does not operate properly (with smart key system)
Locking and unlocking the doors key linked functions
Using the mechanical key
(
→P. 28) in order to perform the
following operations:
Locks all doors
Unlocks the door
Turning the key rearward unlocks
the driver’s door. Turning the key
once again unlocks the other
doors.
If communication between the electronic key and vehicle is inter-
rupted (
→P. 34) or the electronic key cannot be used because the
battery is depleted, the smart key system and wireless remote con-
trol cannot be used. In such cases, the doors can be opened or the
engine can be started by following the procedure below.