Toyota PRIUS Manual page 288

2-1. Driving procedures
 Operation of the air conditioning system in Eco drive mode
Eco drive mode controls the heating/cooling operations and fan speed of the
air conditioning system to enhance fuel efficiency. (P. 286) To improve air
conditioning performance, adjust the fan speed and temperature or turn off
Eco drive mode.
 For the shift positions
 When the "POWER" switch is off, the shift position cannot be changed.
 When the "POWER" switch is in ON mode (the hybrid system is not oper-
ating), the shift position can only be changed to N. The shift position will
be changed to N even if the shift lever is shifted to D or R and held in that
position.
However, immediately after turning the "POWER" switch to ON mode,
the shift position may not change to N.
 When the "READY" indicator is on, the shift position can be changed
from P to D, N or R.
 When the "READY" indicator is flashing, the shift position cannot be
changed from P to other position even if the shift lever is operated. Wait
until the "READY" indicator changes from a flashing to a solid light, and
then operate the shift lever again.
 The shift position can only be changed to B directly from D.
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PRIUS PHV_OM_OM47831E_(EE)