Lexus SC430 Owner's Manual page 11

When your vehicle is receiving signals
from the satellites, the "GPS" mark ap-
pears at the top left of the screen.
The GPS signal may be physically ob-
structed, leading to inaccurate vehicle
position on the map display. Tunnels, tall
buildings, trucks, or even the placement of
objects on the instrument panel may ob-
struct the GPS signals.
The GPS satellites may not send signals
due to repairs or improvements being
made to them.
Even when the navigation system is re-
ceiving clear GPS signals, the vehicle
position may not be shown accurately or
inappropriate route guidance may occur in
some cases.
NOTICE
The installation of window tinting
may obstruct the GPS signals. Most
window tinting contains some metal-
lic content that will interfere with GPS
signal reception of the antenna in the
instrument panel. We advise against
the use of window tinting on vehicles
equipped with navigation systems.
BASIC FUNCTIONS
(a) Accurate current vehicle
position may not be shown in
the following cases:
D
When driving on a small angled Y−
shaped road.
D
When driving on a winding road.
D
When driving on a slippery road such
as in sand, gravel, snow, etc.
D
When driving on a long straight road.
D
When freeway and surface streets run
in parallel.
D
After moving by ferry or vehicle carrier.
D
When a long route is searched during
high speed driving.
D
When driving without setting the cur-
rent position calibration correctly.
D
After repeating a change of direction by
going forward and backward, or turning
on a turntable in the parking lot.
D
When leaving a covered parking lot or
parking garage.
D
When a roof carrier is installed.
D
When driving with tire chains installed.
D
When the tires are worn.
D
After replacing a tire or tires.
D
When using tires that are smaller or
larger than the factory specifications.
D
When the tire pressure in any of the
four tires is not correct.
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