Mazda RX-8 Workshop Manual page 3347

2011 - rx-8
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electrical component.
Is noise present after
inspection?
NOTE:
Inspect following:
7
Inspect antenna plug
connection condition.
Is connection okay?
8
Turn ignition switch to LOCK
position.
Measure continuity between
antenna feeder axis and
ground.
Is there any continuity?
9 Compare reception with other audio unit/car-
navigation unit on same model (model/unit)
under same problem conditions.
Power
supply to
electrical
component
for voltage
drop
(compare
with battery
voltage)
Resistance
between
ground of
electrical
component
and body.
(Should be
close to 0
ohm)
Installation
condition of
noise
prevention
capacitor for
fuel pump
etc.
No Troubleshooting completed.
NOTE:
The audio unit/car-navigation unit
supplies 12 V battery power to the
antenna amplifier for the AM radio
reception in the radio mode. The
audio unit/car-navigation unit
cannot receive the AM signals
without the 12 V battery power to
the antenna amplifier. If the AM
signals become strong, the
audio/unit car-navigation unit may
receive the signal with noises.
YesGo to the next step.
No Insert antenna plug securely.
YesReplace antenna feeder.
No Go to the next step.
YesThe system is normal (It is caused by electronic
jamming from outside, or inferior broadcasting
station signal condition).

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