window TOYOTA AVALON 2010 XX30 / 3.G Navigation Manual

BASIC FUNCTIONS
52
Points of interest such as gas stations
and restaurants can be displayed on
the map screen. You can also set their
location as a destination and use them
for route guidance.
To display a particular type of point of
interest on the screen, select the
“POI” switch on the map right side of
the screen.
A window with a limited choice of points of
interest will be displayed. When you select
your desired type of point of interest, icons
will appear on the map screen indicating
where the POI addresses are located.
“More”: If you cannot find your desired
point of interest on the limited choice
screen, select this switch. The screen then
displays the more “Point of Interest” listing
screen.
You can show up to 5 types of icons on the
screen.
When you select the point of interest type
from more list, the screen will display the
complete “Point of Interest” listing screen.
Selecting the “Delete” switch will delete
the last selected icon.
When you select a point of interest type
from either the limited list or the complete
list, the screen will display icons at those
locations on the map screen.
Displaying points of interest

BASIC FUNCTIONS
59
This navigation system calculates the
current vehicle position using satellite
signals, various vehicle signals, map
data, etc. However, an 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 built in for security reasons.
While the navigation system will compen-
sate for this most of the time, occasional
positioning errors of up to 300 feet (100 m)
can and should be expected. Generally,
position errors will be corrected within a
few seconds.
When your vehicle is not receiving signals
from the satellites, the “GPS” mark does
not appear at 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 good 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.
Limitations of the navigation
system