tires TOYOTA AVALON 2009 XX30 / 3.G Navigation Manual

BASIC FUNCTIONS
59
When your vehicle is not receiving signals
from the satellites, the “GPS” mark does
not appear at 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 good 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.
(a) Accurate current vehicle position
may not be shown in the following
cases:
When driving on a small angled Y−
shaped road.
When driving on a spiral road.
When driving on a slippery road such
as in sand, gravel, snow, etc.
When driving on a long straight road.
When freeway and surface streets run
in parallel.
After moving by ferry or vehicle carrier.
When a long route is searched during
high speed driving.
When driving without setting the cur-
rent position calibration correctly.
After repeating a change of directions
by going forward and backward, or
turning on a turntable in the parking lot.
When leaving a covered parking lot or
parking garage.
When a roof carrier is installed.
When driving with the tire chains
installed.
When the tires are worn.
After replacing a tire or tires.
When using tires that are smaller or
larger than the factory specifications.
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 informa-
tion on setting the current position
calibration, see page 95.

BASIC FUNCTIONS
60
(b) Inappropriate route guidance may
occur in the following cases:
When turning at a wrong intersection
off the designated route guidance.
If you are heading for a destination
without passing through a set preferred
road, automatic rerouting may display
a route returning to the set preferred
road.
When turning at an intersection for
which there is no route guidance.
When passing through an intersection
for which there is no route guidance.
During automatic rerouting, the route
guidance may not be available for the
next turn to the right or left.
It may take a long time to operate auto-
matic rerouting during high speed dri-
ving. In automatic rerouting, a detour
route may be shown.
During automatic rerouting, the route
may not be changed.
The route in a U− turn may be shown or
announced.
A location may have multiple names
and the system will announce one or
more.
Some routes may not be searched.
If the route to your destination includes
gravel, unpaved roads or alleys, the
route guidance may not be shown.
Your destination point might be shown
on the opposite side of the street.
When a portion of the route has regula-
tions prohibiting the entry of the vehicle
that vary by time or season or other
reasons.
The road and map data stored in your
navigation system may not be com-
plete or may not be the latest release. After replacing the tire, implement the
operation described in the “Current
position calibration”. (For details, see
page 95.)
This navigation system uses tire turning
data
and is designed to work with factory −
specified tires for your Toyota. Installing
tires that are larger or smaller than the orig-
inally equipped diameter may cause inac-
curate display of the vehicle’s position.
The tire pressure also affects the diameter
of the tires so please make sure the tire
pressure of all four tires is correct.

ADVANCED FUNCTIONS
96
POSITION/DIRECTION CALIBRATION
1. Move the cursor mark to your de-
sired point by operating the select and
scroll lever of the n avigation controller.
Push the
“ENTER” button on the navi-
gation controller.
2. Operate the select and scroll lever
of the navigation controller, so that the
screen direction is facing to your de-
sired direction.
Push the
“ENTER” button on the navi-
gation controller, and then the map screen
will be displayed. TIRE CHANGE CALIBRATION
The tire change calibration function
should be used when the tires are re-
placed.
This will adjust for any possible
change in tire circumference from the
old tires to the new ones. If this proce-
dure is not performed when tires are re-
placed, the current vehicle position
mark may become incorrect.
To execute the fast distance tire calibration
procedure, select the
“Tire change”switch on the “Calibration” screen.
The message appears and the fast dis-
tance calibration is automatically started.
A few seconds later, the map screen will be
displayed.

MORE ADVANCED FUNCTIONS
11 6
Information itemsScheduled maintenance
Replace engine oil
Replace engine oil filter
Rotate tires
Replace tires
Replace battery
Replace brake lining
Replace wiper blades
Replace engine coolant
Replace brake fluid
Replace ATF
Replace air filter
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