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Appendix
When the positioning by GPS is
impossible
• If signals cannot be received from more than
two GPS satellites, GPS positioning does not
take place.
• In some driving conditions, signals from GPS
satellites may not reach your vehicle. In this
case, it is impossible for the system to use
GPS positioning.
• If a vehicle phone or cellular phone is used
near the GPS antenna, GPS reception may be
lost temporarily.
• Do not cover the GPS antenna 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
antenna clear.
❒ If, for any reason, GPS signals cannot be
received, learning and error correction are not
possible. If GPS positioning has been operat-
ing 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 recov-
ered.
Conditions Likely to Cause
Noticeable Positioning Errors
For various reasons such as the state of the road
you are traveling 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 shallow turn.
• If there is a parallel road.
• If there is another road very nearby, for exam-
ple, an elevated freeway.
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