l The use of a cellular phone inside or near the vehicle may cause
a noise from the speakers of the audio/visual system which you
are listening to. However, this does not indicate a malfunction.
RADIO
Usually, a problem with radio reception does not mean there
is a problem with the radio — it is just the normal result of
conditions outside the vehicle.
For example, nearby buildings and terrain can interfere
with FM reception. Power lines or phone wires can interfere
with AM signals. And of course, radio signals have a limited
range. The farther the vehicle is from a station, the weaker
its signal will be. In addition, reception conditions change
constantly as the vehicle moves.
Here, some common reception problems that probably do
not indicate a problem with the radio are described.
FM
Fading and drifting stations: Generally, the effective range
of FM is about 25 miles (40 km). Once outside this range,
you may notice fading and drifting, which increase with
the distance from the radio transmitter. They are often
accompanied by distortion.
Multi-path: FM signals are reective, making it possible for
2 signals to reach the vehicle’s antenna at the same time. If
this happens, the signals will cancel each other out, causing
a momentary utter or loss of reception.
docstructure.indb 92 2014/08/20 17:34:38
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