window TOYOTA TUNDRA 2005 1.G Navigation Manual

10 You can change the orientation of the map
from northup to headingup by touching
the orientation symbol at the top left of the
screen.
Northup symbol
Regardless of the direction of vehicle travel,
North is always up.
Headingup symbol
The direction of vehicle travel is always up.
A red arrow indicates North.
Limitations of the navigation
system
This navigation system calculates the cur-
rent vehicle position using satellite sig-
nals, various vehicle signals, map data,
etc. However, the accurate position may
not be shown depending on the satellite
condition, road configuration, vehicle
condition or other circumstances.
The Global Positioning System (GPS) devel-
oped and operated by the U.S. Department of
Defense provides an accurate current vehicle
position using 3 to 4 satellites. The GPS sys-
tem has a certain level of inaccuracy. While
the navigation system will compensate for
this most of the time, occasional positioning
errors 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 receiving signals from
the satellites, the “GPS” mark appears at the
top left of the screen.
The GPS signal may be physically ob-
structed, leading to inaccurate vehicle posi-
tion on the map display. Tunnels, tall build-
ings, trucks, or even the placement of objects
on the instrument panel may obstruct the
GPS signals.
The installation of window tinting may also ob-
struct the GPS signals. Most window tinting
contains some metallic content that will inter-
fere with the GPS signal reception. We ad-
vice against the use of window tinting on ve-
hicles equipped with navigation systems.
The GPS satellites may not send signals due
to repairs or improvements being made to
them.