Tips For The Navigation System; Gps (Global Positioning System) - Lexus LS500 Quick Manual

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3-5. Tips for the navigation system

3-5.Tips for the navigation system

GPS (Global Positioning
System)
This navigation system calculates
the current position using satellite
signals, various vehicle signals, map
data, etc. However, an accurate
position may not be shown depend-
ing on satellite conditions, road
configuration, vehicle condition or
other circumstances.
Limitations of the navigation sys-
tem
The Global Positioning System (GPS)
developed and operated by the U.S.
Department of Defense provides an
accurate current position, normally
using 4 or more satellites, and in some
case 3 satellites. The GPS system has a
certain level of inaccuracy. While the
navigation system compensates for this
most of the time, occasional position-
ing errors of up to 300 ft. (100 m) can
and should be expected. Generally,
position errors will be corrected within
a few seconds.
When the vehicle is not receiving sig-
nals from satellites, the unreceived
GPS mark appears on the map screen.
When the vehicle is receiving the sig-
nals, the unreceived GPS mark does
not appear on the map screen.
The GPS signal may be physically
obstructed, leading to inaccurate vehi-
cle position on the map screen. Tun-
nels, tall buildings, trucks, or even the
placement of objects on the instrument
LS500_LS500h_Navi_OM50F66U_(U)
panel may obstruct the GPS signals.
The GPS satellites may not send sig-
nals due to repairs or improvements
being made to them.
Even when the navigation system is
receiving clear GPS signals, the vehi-
cle position may not be shown accu-
rately or inappropriate route guidance
may occur in some cases.
NOTICE
The installation of window tinting may
●
obstruct the GPS signals. Most win-
dow tinting contains some metallic
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.
 Accurate current position may not
be shown in the following cases:
• 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 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 current
position calibration correctly.
• After repeating a change of direction by
going forward and backward, or turning
on a turntable in a parking lot.
• When leaving a covered parking lot or
parking garage.