Mazda RX-8 Workshop Manual page 3307

all the speakers?
6 Inspect the suspect
speaker.
Is the speaker normal?
7 Attempt to duplicate the
symptom on the other
vehicle.
Is the noise better than
the customers vehicle?
8 Turn the ignition switch
to the LOCK position.
Remove the audio
unit/car-navigation unit.
Inspect the connection
of the audio unit
connector (24-pin) (for
sound signal line).
Is the connector
connected securely?
9 Is there any noise?
No Go to the next step.
YesGo to the next step.
If there is any foreign material to the
No
speaker:
Remove the foreign material from the
speaker.
If the speaker is malfunctioning:
Replace the speaker.
If the speaker is not installed
properly:
Install the speaker properly.
YesGo to the next step.
No The system is normal. Explain the noise generation
mechanism to the customer.
NOTE:
The noise may be heard depends on the
operating speed of the audio power and/or
mode switch.
YesGo to the next step.
No If poor connection of audio unit connector:
Security connect the audio connector.
If the audio unit side connector is wrong:
Replace the audio unit/car-navigation unit.
If the wiling harness-side connector is wrong:
Repair or replace the pins and/or the
connector.
After treating either the above-mentioned, then go to the
next step.
YesGo to the next step.