Lexus 2003 LS Owner's Manual page 569

Limitations of the Navigation System
(a) Accurate current vehicle posi-
tion may not be shown in the fol-
lowing cases:
D When driving on a small angled Y–
shaped road.
D When driving on a spiral 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 current
position calibration correctly.
D After repeating a change of directions 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 the tire chains installed.
D When the tires are worn.
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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.
INFORMATION
If your vehicle cannot receive GPS sig-
nals, you can correct the current posi-
tion manually. For the information on
setting the current position calibration,
see page 80.
(b) Inappropriate route guidance
may occur in the following cases:
D When turning at a wrong intersection off
the designated route guidance
D If you set more than one destination, auto
reroute will display a route returning to the
destination on the previous route when
you try to skip any of the destinations.
D When turning at an intersection, there is
no route guidance.
D When passing through the intersection,
there is no route guidance.
D During automatic rerouting, the route
guidance may not be available for the next
turn to the right or left.
D It may take a long time to operate auto re-
route during high speed driving. In auto
reroute, a detour route may be shown.
D After auto reroute, the route may not be
changed.
D An unnecessary U–turn may be shown or
announced.
D A location may have multiple names and
the system will announce one or more.