Toyota Sienna 2008 Manual page 215

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(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 current
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.
INFORMATION
If your vehicle cannot receive GPS sig-
nals, you can correct the current posi-
tion manually. For information on set-
ting the current position calibration, see
D
"
Current position/tire change calibra-
tion" on page 107.
APPENDIX
(b) Inappropriate route guidance may oc-
cur in the following cases:
D
When turning at an intersection off the
designated route guidance.
D
If you set more than one destination but
skip any of them, auto reroute will display
a route returning to the destination on the
previous route.
D
When turning at an intersection for which
there is no route guidance.
D
When passing through an intersection,
there is no route guidance.
D
During auto reroute, 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.
D
Some routes may not be searched.
D
If the route to your destination includes
gravel, unpaved roads or alleys, the route
guidance may not be shown.
223

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