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System Limitations
Also, depending on your current view
of the sky and the position of the
satellites, the elevation may be shown
incorrectly.
You may also notice some delay of the
vehicle position icon at intersections;
this is normal.
GPS Reception Issues
The signals received from the GPS
satellites are extremely weak (less
than a millionth of the strength of
a local FM station) and require an
unobstructed view of sky. The signal
can easily be interrupted or interfered
with by the following:
• Aftermarket metallic window tint
above or to the sides of the GPS
antenna (located on the back of the
navigation display)
• Cell phones, PDAs, or other
electronic devices docked in a cradle
or lying loose on the dashboard
• Remote starters or "hidden" vehicle
tracking systems mounted near the
navigation unit
124 Navigation System
• Other aftermarket audio electronic
devices mounted near the navigation
unit
• Trees, tall buildings, freeway
overpasses, tunnels, or overhead
electrical power wires
Although the system will direct you
to your desired destination, it may not
always generate what you consider to
be the most direct route. Try changing
the method of routing. See Changing
the Routing Method on page 52 . You may
also have Unverifi ed Area Routing set
to OFF. See Unverifi ed Area Routing on
page 102 .
Additionally, the mapping database
contains verifi ed and unverifi ed maps.
See Map Overview on page 6 . A
Disclaimer screen will warn you if
your route includes unverifi ed streets.
Unverifi ed streets may be missing from
the map, in the wrong location, or have
an incorrect name or address range.
Exercise additional caution when
driving in these unverifi ed areas.
The destination icon shows the
approximate location of the destination.
This occurs because a city block can
have as many as 100 possible addresses
(for example, the 1400 block is followed
by the 1500 block) Since most cities
use only a portion of the 100 possible
addresses (for example, in the 1400
block, the addresses may only go up to
1425 before the 1500 block starts), the
address 1425 will be shown a quarter of
the way down the block by the system
instead of at the end of the block where
the destination is actually located.
You may fi nd that the system
occasionally reboots. This is indicated
by the display returning to the globe
screen. A reboot can be caused by a
number of things, such as extreme
temperatures or shock from bumpy
roads. It does not necessarily indicate
a problem that requires service. If this
happens frequently, please see your
dealer.
System Limitations
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