2001 Lexus GS 300 Navigation Manual - Page 48

2001 Lexus GS 300 Manual

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Limitations of the Navigation System The GPS satellites may not send signals due to repairs or improvements being made to them. Even when the navigation system is receiving good GPS signals, the vehicle position may not be shown accurately or inappropriate route guidance may occur in some cases. (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 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. 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 signals, you can correct the current position manually. For the information on setting the current position calibration, see page 61. 40

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Limitations of the Navigation System
40
The GPS satellites may not send signals due
to repairs or improvements being made to
them.
Even when the navigation system is receiv-
ing good GPS signals, the vehicle position
may not be shown accurately or inappropri-
ate route guidance may occur in some
cases.
(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 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.
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 61.