Toyota PRIUS 2008 Manual page 432

5-2. Steps to take in an emergency
Alarm
Exterior alarm:
One beep
(sounds for 2
seconds)
Interior alarm:
One beep
432
PRIUS_U_(L/O_0802)
Warning
Details
light
The lock button has
been pressed while
the hybrid system is
not OFF and the shift
position is in "P".
The vehicle's ID code
detection system has
judged that the smart
key is not present
(for 5
when the "POWER"
seconds)
switch is pressed.
Correction procedure
Turn the hybrid sys-
tem OFF.
Check that the
smart key is in the
vehicle and within
the detection area.