snow chains TOYOTA SEQUOIA 2013 2.G Navigation Manual

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3
NAVIGATION SYSTEM
5. GPS (GLOBAL POSITIONING SYSTEM)
1. LIMITATIONS OF THE NAVIGATION SYSTEM
The Global Positioning System (GPS) de-
veloped and operated by the U.S. Depart-
ment of Defense provides an accurate
current position, normally using 4 or more
satellites, and in some case 3 satellites.
The GPS system has a certain level of in-
accuracy. While the navigation system will
compensate for this most of the time, oc-
casional positioning errors of up to 300
feet (100 m) can and should be expected.
Generally, position errors will be corrected
within a few seconds.
When the vehicle is receiving signals from
satellites, the “GPS” mark appears at the
top left of the screen.
The GPS signal may be physically ob-
structed, leading to in accurate vehicle po-
sition on the map screen. 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 naviga tion system is re-
ceiving clear GPS signals, the vehicle po-
sition may not be shown accurately or
inappropriate route guidance may occur in
some cases.
 Accurate current position may not be
shown in the following cases:
• When driving on a small angled Y-
shaped road.
• When driving on a winding 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 current
position calibration correctly.
• After repeating a change of direction by going forward and backward, or turning
on a turntable in a parking lot.
• When leaving a covered parking lot or parking garage.
• When a roof carrier is installed.
• When driving with 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 4 tires is not correct.
This navigation system calculates the
current position using satellite signals,
various vehicle signals, map data, etc.
However, an accurate position may not
be shown depending on satellite condi-
tions, road configuration, vehicle con-
dition or other circumstances.NOTICE
● The installation of window tinting may
obstruct the GPS signals. Most window
tinting contains some metallic content
that will interfere with GPS signal recep-
tion of the antenna in the instrument
panel. We advise against the use of win-
dow tinting on vehicles equipped with
navigation systems.
If the vehicle cannot receive GPS sig-
nals, the current position can be
adjusted manually. For information on
setting the current position calibration,
see page 104.

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1. REAR VIEW MONITOR SYSTEM
9
PERIPHERAL MONITORING SYSTEM
CAUTION
●Do not use system in the following
cases:
• On icy or slick road surfaces, or in
snow
• When using tire chains or emergency tires
• When the back door is not closed com- pletely
• On roads that are not flat or straight, such as curves or slopes.
● In low temperatures, the screen may
darken or the image may become faint.
The image could distort when the vehi-
cle is moving, or you may become
unable to see the image on the screen.
Be sure to visually check all around the
vehicle both directly and using the mir-
rors before proceeding.
● If the tire sizes are changed, the position
of the fixed guide lines displayed on the
screen may change.
● The camera uses a special lens. The
distances between objects and pedestri-
ans that appear in the image displayed
on the screen will differ from the actual
distances. (See page 287.)