Toyota 2012 Avalon Owner's Manual page 79

1-6. Theft deterrent system
Engine immobilizer system
The vehicle's keys have built-in transponder chips that prevent the
engine from starting if the key has not been previously registered in
the vehicle's on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
96
Vehicles with a smart key
system
The indicator light flashes after
the "ENGINE START STOP"
switch has been turned off to
indicate that the system is
operating.
The indicator light stops flash-
ing after the "ENGINE START
STOP" switch has been turned
to ACCESSORY or IGNITION
ON mode to indicate that the
system has been canceled.
I n f o r ma t i o n P r o v i d e d b y :