Toyota Prius 2019, Owner'S Manual

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3-6. Tips for operating the navigation system
3-6.Tips for operating the navigation system
The Global Positioning System
(GPS) developed and operated by
the U.S. Department of Defense
provides an accurate current posi-
tion, normally using 4 or more satel-
lites, 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 positioning
errors of up to 100 m can and
should be expected. Generally,
position errors will be corrected
within a few seconds.
The GPS signal may be physically
obstructed, leading to inaccurate
vehicle position on the map screen.
Tunnels, tall buildings, trucks, or
even the placement of objects on
the instrument panel may obstruct
the GPS signals.
The GPS satellites may not send
signals due to repairs or improve-
ments being made to them.
Even when the navigation system
is receiving clear GPS signals, the
vehicle position may not be shown
accurately or inappropriate route
guidance may occur in some
cases.
 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 motorway and surface streets
run in parallel.
• After moving by ferry or vehicle car-
rier.
• 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 direction
by going forward and backward, or
turning on a turntable in a parking lot.
• When leaving a covered parking lot
or parking garage.
• When a roof carrier is installed.
GPS (Global Positioning
System)
This navigation system calcu-
lates the current position using
satellite signals, various vehi-
cle signals, map data, etc.
However, an accurate position
may not be shown depending
on satellite conditions, road
configuration, vehicle condi-
tion or other circumstances.
Limitations of the navigation
system
NOTICE
●
The installation of window tinting
may obstruct the GPS signals. Most
window 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 win-
dow tinting on vehicles equipped
with navigation systems.