2009 TOYOTA PRIUS window

APPENDIX
132
This navigation system calculates the
current vehicle position using satellite
signals, various vehicle signals, map
data, etc. However, the accurate posi-
tion may not be shown depending on
the satellite condition, road configura-
tion, vehicle condition or other circum-
stances.
The Global Positioning System (GPS) de-
veloped and operated by the U.S. Depart-
ment of Defense provides an accurate cur-
rent vehicle position, normally using 4 or
more satellites, and in some cases 3 satel-
lites. The GPS system has a certain level
of inaccuracy. While the navigation sys-
tem will compensate for this most of the
time, occasional positioning errors of up to
300 feet (100 m) can and should be expec-
ted. Generally, position errors will be cor-
rected within a few seconds.When your vehicle is receiving signals
from the satellites, the “GPS” mark ap-
pears at the top left of the screen.
The GPS signal may be physically ob-
structed, leading to inaccurate vehicle
position on the map display. Tunnels, tall
buildings, trucks, or even the placement of
objects on the instrument panel may ob-
struct the GPS signals.
The GPS satellites may not send signals
due to repairs or improvements being
made to them.
Even when the navigation system is re-
ceiving clear GPS signals, the vehicle
position may not be shown accurately or
inappropriate route guidance may occur in
some cases.
NOTICE
The installation of window tinting
may obstruct the GPS signals. Most
window tinting contains some metal-
lic content that will interfere with GPS
signal reception of the antenna in the
instrument panel. We advise against
the use of window tinting on vehicles
equipped with navigation systems.
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Limitations of the
navigation system

20
NOTICE
The installation of window tinting may obstruct the GPS signals. Most window
tinting contains some metallic content that will interfere with GPS signal recep\
-
tion of the antenna in the instrument panel. We advise against the use of win-
dow tinting on vehicles equipped with navigation systems.
(a) Accurate current vehicle position may not be shown in the following case\
s:
When driving on a small angled Y −shaped road.
When driving on a winding road.
When driving on a slippery road such as in sand, gravel, snow, etc.
When driving on a long straight road.
When motorway and surface streets run in parallel.
After moving by ferry or vehicle carrier.
When a long route is searched during high speed driving.
When driving without setting the current position calibration correctly.
After repeating a change of direction by going forward and backward, or \
turning on
a turntable in the parking lot.
When leaving a covered parking lot or parking garage.
When a roof carrier is installed.
When driving with tire chains installed.
When the tires are worn.
After replacing a tire or tires.
When using tires that are smaller or larger than the factory specificati\
ons.
When the tire pressure in any of the four tires is not correct.
INFORMATION
If your vehicle cannot receive GPS signals, you can correct the current po\
sition
manually. For information on setting the current position calibration, see page
108.
(b) Inappropriate route guidance may occur in the following cases:
When turning at an intersection off the designated route guidance.
If you set more than one destination but skip any of them, auto reroute \
will display
a route returning to the destination on the previous route.
When turning at an intersection for which there is no route guidance.
When passing through an intersection for which there is no route guidanc\
e.
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