Navi; General Operation - Porsche PCM3.1 Operating Manual

NAVI

General operation

The PCM navigation system utilises visual and au-
dible driving recommendations to help you reach
your destination.
The vehicle's position is determined with the aid of
a GPS antenna and a receiver in the navigation
module.
The vehicle position is calculated by evaluating
and processing additional vehicle signals
(e.g. speed) in the navigation computer. This ena-
bles the system to automatically correct signal
changes due to wheel changes (altered tyre diam-
eter), temperature or air pressure variations.
The PCM features a hard drive where the digital
map data is stored.
If an area on this hard drive is damaged or corrupt,
the PCM can no longer access the data on it.
A message to this effect will be displayed.

During an active telephone call, the driving
recommendations are suppressed.
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NAVI
WARNING!
Accident hazard. The navigation system is
only intended as an aid to the driver and makes
recommendations on the routes to take. This
does not release you from full responsibility for
observing road safety, traffic conditions, legal
road traffic regulations and any other relevant
regulations while driving your vehicle.
As the driver, you must assess the traffic situ-
ation. You have sole responsibility for road
safety while driving your car.
û Continue to pay attention to the traffic situ-
ation.
To ensure you make the most effective use of your
PCM navigation system, please observe the fol-
lowing points:
– GPS reception can be impaired under trees or
between high buildings. No GPS reception is
possible in multi-storey car parks, tunnels
and the like.
– The GPS antenna must not be covered by me-
tallic or damp objects.
– After the vehicle's on-board voltage has been
interrupted (e.g. for changing the vehicle bat-
tery), it can take up to 15 minutes or more de-
pending on the reception conditions for the
GPS to re-initialise.
– After transporting the vehicle, for example by
ferry, it can take several minutes depending on
the reception conditions after switching on un-
til the current GPS position is established.
– Without GPS reception, the system calculates
the current position using the vehicle signals
and therefore remains operational in situations
where the reception is temporarily poor.
– High wheel slip (spin on snow) can result in an
incorrect position being given for a short time.
– After initial start-up of the navigation system,
the fine calibration requires approx. 50 km
(30 miles).
– After a tyre change (e.g. summer/winter
tyres), fine calibration will only be reached after
up to 50 km (30 miles).
– During fine calibration, full location accuracy is
not yet reached.