sat nav TOYOTA AVALON 2008 XX30 / 3.G Navigation Manual

BASIC FUNCTIONS
58
3. When there are 2 map screens dis-
played to switch the Northup/Head-
ingup of the right screen map, select
the
“Right screen” switch.
4. Select the “Map orient.” of the
“Edit right screen”, and then the North
up/Headingup of the right screen is
switched.
When 2 map screens are displayed, you
can set one as the North−up and the other
one as the Heading−up.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.
Limitations of the navigation
system

BASIC FUNCTIONS
59
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.
(a) Accurate current vehicle position
may not be shown in the following
cases:
When driving on a small angled Y−
shaped road.
When driving on a spiral road.
When driving on a slippery road such
as in sand, gravel, snow, etc.
When driving on a long straight road.
When freeway 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 cur-
rent position calibration correctly.
After repeating a change of directions
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 the 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 specifications.
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
position manually. For the informa-
tion on setting the current position
calibration, see page 95.

1
Foreword
Thank you for your purchase of the Navigation System. Please
read this manual carefully to ensure proper use. Keep this
manual stored in your vehicle at all times.
The Toyota Navigation System is one of the most technologically
advanced vehicle accessories ever developed. The system receives
satellite signals from the Global Positioning System (GPS) operated
by the U. S. Department of Defense. Using these signals and other
vehicle sensors, the system can show you where you are and
assist you in locating a desired destination.
The navigation system is designed to select efficient routes from
your present starting location to your destination. The system is
designed to direct you to a destination that is unfamiliar to you in
an efficient manner. The system uses the maps of DENSO. The
calculated routes are neither the shortest routes nor routes without
traffic congestion. Your own personal local knowledge or “short cut”
may at times be faster than the calculated routes.
The navigation system’s database includes about 50 point of inter-
est categories to allow you to easily select destinations such as
restaurants and hotels. If a destination is not in the database, you
can enter the street address or a major intersection close to it and
the system will route you there. The system will provide both a
visual map and audio instructions. The audio instructions will an-
nounce the distance and direction to go when you are approaching
a fork or intersection. These voice instructions will help you keep
your eyes on the road and are timed to provide enough time to
allow you to maneuver, change lanes or slow down.

2
Please be aware that all current vehicle navigation systems
have certain limitations that may affect their ability to perform
properly. The accuracy of the vehicle’s position depends on
the satellite condition, road configuration, vehicle condition or
other circumstances. For more information on the limitations
of the system, refer to pages 58 through 60.