Toyota 2015 Prius Owner's Manual page 219

Changing "POWER" switch modes
■
Modes can be changed by pressing the "POWER" switch with
the brake pedal released. (The mode changes each time the
switch is pressed.)
PRIUS_OM_OM47A17U_DVD_(U)
2-1. Driving procedures
Off
The emergency flashers can
be used.
ACCESSORY mode
Some electrical components
such as the audio system can
be used.
The "POWER" switch indicator
turns amber.
ON mode
All electrical components can
be used.
The "POWER" switch indicator
turns amber.
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