Toyota Prius 2011 Manual page 528

5-2. Steps to take in an emergency
Interior Exterior
buzzer buzzer
Contin-
Once
uous
528
Warning message
(Displayed alternately)
(Flashes)
Correction
Details
procedure
The electronic
key has been
taken outside
Turn the
the vehicle and
"POWER"
the doors have
switch to
been locked
OFF and
without first
lock the
turning the
doors
"POWER"
again.
switch to OFF.
(vehicles with
entry function)