Volvo Trucks North America, Inc. Date Group No. Page
Service Bulletin 4.2004 392 08 10(47)
If conditions are correct, the RF wave is absorbed into the
system and will induce stray currents internally within the
system. RFI has the capability to cause disturbances over
longer distance because of the probability of susceptible
devices being highly sensitive. Therefore, RFI can be
very difficult to combat in some cases so good diagnostic
practices are absolutely required.
Some possible vehicle sources of interference:
•
Charging system
•
Solenoids
•
Motors
•
Engine electronics
•
2–way radios
•
Citizen band (CB) radios
•
Cellular phones
•
Satellite Communication systems
•
After-market electrical devices
Troubleshooting Consideration
When troubleshooting radio reception problems consider
problems associated with radio signals. Do not attempt to
troubleshoot radio problems:
•
inside buildings (steel and concrete structures are
worst).
•
in an area with reflected signals (see “Multipath” page
7).
•
close to areas with known electrical interference such
as near high tension power lines.
•
with electrical storms in the area.
To minimize flutter, tune to radio stations with a strong
signal while troubleshooting.
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