Volvo C30 - ANNEXE 798, Operating Manual

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06 Questions & answers
Frequently asked questions
06
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The vehicle’s position on the map is
incorrect
The Global Positioning System (GPS) indicates
the car’s position with an accuracy of about
65 feet (20 meter). Accuracy may be even less
when driving on roads lying parallel to another
road, winding roads, roads on several levels
and also after driving a long distance without
making any distinct turns. Tall buildings and
mountains, tunnels, viaducts, over/under-
passes etc also have a negative affect on the
reception of GPS signals, which means that the
estimation of the car’s position may not be pre-
cise.
VNS does not always calculate the
fastest/shortest route.
When calculating a route, distance, width of
road, type of road, number of right or left turns,
traffic circles etc., are all taken into account
when calculating the best theoretical route.
Experience and local knowledge may, how-
ever, lead to a better choice of route.
The VNS system chooses toll roads,
freeways, and ferries even though I have
opted to avoid them.
When calculating routes over longer distances,
for technical reasons the system can only use
major roads. If you select
NO
for toll roads,
freeways, and ferries, they will be avoided as
much as possible, but will be used if no other
reasonable alternative is available.
After being transported, the car’s
position on the map is incorrect.
If the car is transported, for example by ferry or
train, or in such a way as to impede the recep-
tion of GPS signals, it can take up to 5 minutes
to calculate the car’s new position correctly.
The car’s position on the map is incorrect
after the car battery has been
disconnected.
If power has been cut from the GPS antenna,
it can take more than 5 minutes for the GPS
signals to be received correctly and the car’s
position to be calculated.
It may be necessary to drive ten to fifteen miles,
and make a number of turns before for the sys-
tem will function optimally.
The car symbol on the map moves
erratically after a tire change
In addition to the GPS receiver, the vehicle’s
speedometer and an onboard gyro are also
used to calculate the vehicle’s current location
and direction of travel. If the spare tire is put on
the vehicle, or is a change is made from sum-
mer to winter tires (or vice versa), the naviga-
tion system must "learn" the new dimensions
of the tire(s). Therefore, it may be necessary to
drive for several miles, including a number of
turns, for the system to make this adjustment.
The map image does not correspond
with actual conditions.
Factors such as the constant expansion and
rebuilding of the road network, new traffic reg-
ulations constantly being introduced etc.,
mean that the digital map database is not
always complete. Maps information is periodi-
cally developed and updated. Additional infor-
mation is available from your Volvo retailer.
The map scale sometimes changes
There is no detailed map information for certain
areas. If this is the case, the system automati-
cally changes the map scale.
Certain menu options are not available
Check the settings that you have made. Select
Reset to default
for the particular option to
return to the default settings.
The system indicates the route on which
I am already driving when I have selected
Start guidance or Detour
The system cannot find a better alternative to
the current route.
The car symbol on screen jumps forward
or spins.
The system may need a few seconds to sense
the position and movement of the car before