Pioneer CNDV-50MT - Manual (Page 67)

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• If a vehicle phone or cellular phone is used
near the GPS aerial, GPS reception may be lost
temporarily.
• Do not cover the GPS aerial with spray paint or
vehicle wax, because this may block the
reception of GPS signals. Snow buildup can
also degrade the signals, so keep the aerial
clear.
❒ If, for any reason, GPS signals cannot be
received, learning and error correction are not
possible. If GPS positioning has been
operating for only a short time, your vehicle’s
actual position and the current location mark
on the map may diverge considerably. Once
GPS reception is restored, accuracy will be
recovered.
Vehicles that Cannot Obtain
Speed Pulse Data
❒ The speed pulse data comes from the speed
sensing circuit. The location of this speed
sensing circuit depends on your vehicle
model. In some cases, it is impossible to
make a connection to it, and in such a case
we recommend that the ND-PG1 speed pulse
generator (sold separately) be used.
Conditions Likely to Cause
Noticeable Positioning Errors
For various reasons such as the state of the road
you are travelling on and the state of reception of
the GPS signal, the actual position of your vehicle
may differ from the position displayed on the map
screen.
• If you make a slight turn.
• If there is a parallel road.
• If there is another road very nearby, for
example, an elevated motorway.
In tunnels or enclosed parking garages
Under elevated roads or similar
When driving among high buildings
When driving through a dense forest or tall trees
MAN-CNDV-50MTP-EN.book Page 65 Friday, April 29, 2005 10:33 AM