sensor NISSAN MAXIMA 2003 A33 / 5.G Navigation Manual

WHA T IS A NA VIGA TION
SYSTEM?
ABOUT THE NAVIGATION SYS-
TEM
This navigation system combines the data ob-
tained from the vehicle (by gyro sensor) and
from GPS (Global Positioning System) satel-
lites to calculate the current location of the ve-
hicle. This position is then displayed on the
screen, allowing route guidance to a destina-
tion.
WHA T IS GPS (GLOBAL PO-
SITIONING SYSTEM)?
GPS is a system developed and operated by the
U.S. government, covering the entire globe.
This navigation system receives three or more
different radio signals from NAVST AR (GPS
satellites), orbiting the earth 13,049 miles
(21,000 km) above ground. The data from dif-
ferent sets of signals will be trigonometrically
calculated to obtain the position of the vehicle.INFO:
The tracking center in the US, controls signals
transmitted from GPS satellites. This control
sometimes results in reduced accuracy or no
signal received at all.
ACCURACY OF POSITIONING
The color of the GPS Indicatoron the up-
per left corner of the screen indicates position-
ing as follows:

Green: When positioning is possible and
accurate

Y ellow: When positioning is possible but
not accurate

Gray: When positioning is not possible
INV0255
HOW DOES THE NISSAN NAVIGATION SYSTEM WORK?
2-2

INFO:
For approximately 3 or 4 minutes after system
startup, the GPS indicator
remains gray ,
even if accurate positioning is possible.
POSITIONING ADJUSTMENT
When the system judges that the vehicle po-
sition information is not accurate based on ve-
hicle speed and gyro sensor data calculations,
the system will adjust the vehicle position in-
formation using GPS signals.
RECEIVING SIGNALS FROM
GPS SATELLITES
Sometimes, satellite reception is weak. The fol-
lowing are places where signals tend to be
weak:

Inside tunnels and parking lots in buildings

Areas with numerous tall buildings

Under multi-layered highways

In a dense forestVehicles in these areas may not receive GPS
signals (Indicator color: gray).
INFO:
The antenna for GPS is located in the instru-
ment panel inside the vehicle.Do not place
any object, especially mobile phones or
transceivers, on the instrument panel.
Because the strength of the GPS signals is ap-
proximately one billionth of that of TV waves;
phones and transceivers will decrease the
strength or may totally disrupt the signals.
DISPLAY OF GPS INFORMA-
TION
This system displays GPS information.
Please refer to “GPS information display” on
page 11-12.NOTE:
The navigation system does not take
driving in carpool lanes into consider-
ation for the guidance.
HOW DOES THE NISSAN NAVIGATION SYSTEM WORK?
2-3