Navigation System5
Introduction
The navigation system applies location,
direction, and speed information to the
maps and calculates a route to the
destination you enter. As you drive to
that destination, the system provides
map and voice guidance.
The navigation system is easy to use.
The locations of many places of
business and entertainment are already
entered in the system. You can select
any of them as a destination by using the
Interface Dial or voice control.
There are several ways to enter a
destination, such as by point of interest
(POI), by address, by phone number,
and by selecting it from the map. The
last 50 destinations are saved for reuse
at a later date. The system also allows
you to store a home address to simplify
returning home from your destination.Accessories Precautions
If you have front or side window tinting
installed, be aware that if the tint has
metallic properties, it can seriously
degrade or prevent GPS reception. This
is because the GPS antenna is located
under the dashboard.
If you plan to install electronic
components, such as radar detectors,
vehicle tracking devices, remote
starters, additional amplifiers, or other
audio components, ensure that they are
not located near the navigation control
unit behind a small door located below
the transmission shift lever on the
passenge’s side, near the navigation
display in the dashboard, or near the
GPS antenna under the dashboard.
Signal noise emanating from these
devices can cause intermittent
disruption of the navigation system.
Important Safety Information
The navigation system can distract your
attention from the road if you focus on
the screen or operate the system’s
controls while driving.
Enter as much information as possible
into the system before you begin
driving, or when the vehicle is stopped.
Then, as you drive, listen to the audio
instructions and use voice commands
when possible.
120Navigation System
System Limitations
Although your navigation system is one
of the most highly sophisticated pieces
of equipment you will find in a modern
automobile, you may find during its use
that it has certain limitations.
The system uses GPS signals to aid in
determining its current location. The
GPS is operated by the U.S.
Department of Defense. For security
reasons, there are certain inaccuracies
built into the GPS that the navigation
system must constantly compensate for.
This can cause occasional positioning
errors of up to several hundred feet.
For example, in urban areas where
streets are close together, this could
cause the system to show that you are
traveling on a street that parallels the
street you are actually on. The system
will, under most circumstances, correct
itself while you drive. 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 requir
e 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 under the
dashboard)
• Cell phones, PDAs, or other electronic devices docked in a cradle
or lying loose on the dashboard
• Radar detectors mounted on the dashboard
• Remote starters, or “hidden” vehicle tracking systems mounted near the
navigation unit • 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 rout e. Try changing the
method of routing. See Changing the
Routing Method on page 52. You may
also have Unverified Area Routing set
to OFF. See Unverified Area Routing on
page 101.
Additionally, the mapping database
contains verified and unverified maps.
See Map Overview on page 6.
A Disclaimer screen will warn you if
your route includes unverified streets.
Unverified streets may be missing from
the map, in the wrong location, or have
an incorrect name or address range.
Exercise addition al caution when
driving in these unverified areas.
