Toyota 2007 Prius Owner's Manual page 155

To initialize the system, perform the fol-
lowing:
1. Park the vehicle in a safe place and
the hybrid system is off.
2. Adjust the pressure of all the installed
tires to the specified cold tire inflation
pressure level. (See "Tires" on page
434.)
3. Turn the "POWER" switch to "IG−ON"
mode.
4. Push and hold the tire pressure warn-
ing reset switch until the tire pressure
warning light blinks slowly three times.
5. Wait for a few minutes with the "POW-
ER" switch selected in "IG−ON" mode,
and then turn the hybrid system off.
If you push the tire pressure reset switch
while the vehicle is moving, initialization is
not performed.
If you push the tire pressure reset switch
accidentally and initialization is performed,
adjust the tire inflation pressure to the
specified level and initialize the system
again.
25p124
If the tire pressure warning light does not
blink slowly three times when you push
and hold the reset switch, initialization has
failed and the tire pressure warning sys-
tem may not work properly. In this case,
initialize the system again. If initialization
cannot be performed, have the system
checked at your Toyota dealer.
CAUTION
Do not push the reset switch without
first adjusting the tire inflation pres-
sure to the specified level. Otherwise,
the tire pressure warning light may
not come on even if the tire inflation
pressure is low, or it may come on
when the tire inflation pressure is ac-
tually normal.
155