Mazda 323 1988 Workshop Manual page 1015

15
AUDIO SYSTEM
RADIO
I/
Check connectors.
I
Tighten the screws.
NG
&L?
OK
Tune correctly.
Is there still engine noise?
Tuning
Tune with preset button, and
set again if the stations be-
come noisy.
When FM tuning is correct
no extra noise should be
heard.
Check antenna.
Tester indicates infinite?
Antenna feeder
YES
ON
Engine
OFF
Ohmmeter
- Is there still noise when
Plug NO
pulling out antenna plug?
YES
=&4 NO
Replace unit.
OK
If noise still occurs after
checking above points,
check for outside noise
sources (various accessories,
i.e. horn, wipers, etc.).
YES
Is wiring correct?
NO
Repair harness.
Noise from outside source.
(No fault in radio unit.)
83"15X-149
15-120