GPS symbol—Indicates that
insufficient GPS satellite signals are
being received for accurate map
positioning. The symbol is not
displayed under normal operation.
Speaker icon symbol—Press to
turn voice guidance on/off.
Navigation menu
To access the Navigation Menu,
press NAV MENU at the bottom of
the map screen.
Once pressed, the Navigation Menu
will display showing the following
options:
•Route Options/Preferences
•Navigation Set Up
•Display Options
•Stored Locations
•On Route Scroll
•Voice Guidance/Volume
Depending upon whether or not a route is active will determine if route
options/route preferences is contained on the Navigation Menu.
Route options (destination entered)
Once in navigation mode and a
route is currently active, press
“Chng. route”to access the ROUTE
OPTIONS screen. Choose from the
following selections:
•Detour: Press to select a detour
around the current route. Refer
toDetour optionslater in this
chapter for further information.
•Route Preferences: When
creating a destination, select from: Minimize Time/Distance, Use Major
Roads, Use Toll Roads, Use Ferries.
2003 Town Car(tow)
Owners Guide (post-2002-fmt)
USA English(fus)
Entertainment Systems
45
Static can be caused on AM stations by power lines, electric fences,
traffic lights and thunderstorms. Moving away from an interfering
structure (out of its“shadow”) returns your reception to normal.
•Station overload.Weak signals are sometimes captured by stronger
signals when you pass a broadcast tower. A stronger signal may
temporarily overtake a weaker signal and play while the weak station
frequency is displayed.
Principles of GPS (global positioning system) operation
Your system directs you based on information derived from global
positioning satellites, road maps stored on the DVD, sensors in your
vehicle and the desired destination. The system compiles all necessary
information to guide you to your selected destination. Space satellites
determine the vehicle’s current location and transmit position and time
signals to your car.
If the vehicle has been parked for a long period of time, the navigation
function may be temporarily unresponsive. The navigation system will
operate reliably again once GPS reception is available for a few minutes.
Limited GPS reception
System performance may be adversely affected if GPS reception is
interrupted or interference occurs over a distance of several miles. The
following are possible causes for GPS reception being interrupted. If the
vehicle is:
•in multi-story parking garages
•in tunnels and under bridges
•inside or in between buildings
•by forests or tree-lined avenues
•in heavy rain showers and thunderstorms
•in valleys and in mountainous regions
•roads under cliffs
Ensure that you do not have any metal objects on the rear parcel shelf
and that if your windows are tinted, they use non-metal tinting instead of
metal oxide tinting. Both of these factors can also interrupt GPS
reception.
Cleaning the display
Do not spray cleaning fluid directly onto the unit. Instead, spray onto a
soft cloth and gently wipe the unit. Only recommended products should
be used.
2003 Town Car(tow)
Owners Guide (post-2002-fmt)
USA English(fus)
Entertainment Systems
68
