Mazda RX-8 Workshop Manual page 3334

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2011 - RX-8 - Body and Accessories
NO.1 NO RADIO RECEPTION (AM/FM)/NO OR LOW VOLUME [RADIO]
1 No radio reception (AM/FM)/no or low volume/Possible DTC: 09:Er20, 09:Er22
POSSIBLE
CAUSE
Diagnostic procedure
STEP
1 Turn the audio unit/car-navigation unit
power to ON.
Is the LCD indicated correctly?
2 Measure voltage at B+ and ACC terminals.
Is voltage okay?
Specification
With ignition switch ON: 11.5 V or
more
At idling: 12.5 V or more
3 Set volume to 10 to 15.
Low vehicle battery voltage
Electronic jamming from outside, or inferior condition of broadcasting
station radio wave
Jamming from aftermarket electronic equipment (two-way radio, navigation
system, mobile phone, etc.)
Antenna plug poor connection
Antenna feeder malfunction
Audio unit/car-navigation unit malfunction
INSPECTION ACTION
YesGo to Step 3.
No Go to the next step.
YesGo to the next step.
No Follow diagnostic procedure for
symptom No. 2 (AUDIO).
YesGo to the next step.