Mazda MX-6 1998, Workshop Manual

Page: 1092 / 1282

TROUBLESHOOTING [AUDIO]
STEP INSPECTION ACTION
4 Inspect speaker with poor sound quality,
c r 0 9 -2 0 DOOR SPEAKER INSPECTION
c r 0 9 -2 0 REAR SPEAKER INSPECTION
Is speaker okay?
Yes Equipped with BOSE speaker:
Replace audio unit or audio amplifier,
c r 0 9 -2 0 AUDIO UNIT REMOVAL
c r 09-2 0 AUDIO UNIT INSTALLATION
o r 0 9-20 AUDIO AMPLIFIER
REMOVAL/INSTALLATION
Equipped without BOSE speakser:
Replace audio unit.
c r 0 9-20 AUDIO UNIT REMOVAL
o* 0 9-20 AUDIO UNIT INSTALLATION
No Replace speaker.
c r 0 9-20 DOOR SPEAKER
REMOVAL/INSTALLATION
c r 0 9-20 REAR SPEAKER REMOVAL/INSTALLATION
6 Noise occurs
TROUBLESHOOTING HINTS
Malfunction in audio unit operation signal circuit
© Noise occurs
• Malfunction in front antenna feeder location
• Audio unit malfunction
• Malfunction in wiring harness between audio unit and speaker
Influence of ambient noise
© Noise occurs
• Fading (AM radio)
• Fast fading (FM radio)
Influence of vehicle-induced noise
© Noise occurs
• Fuel pump noise
• Ignition noise
•
Generator noise
• Windshield wiper motor noise
• Windshield washer motor noise
• Power window regulator noise
• Cooling fan motor noise
• Condenser fan motor noise
• Brake switch noise
• Turn signal light noise
• Horn noise
• Blower motor noise
STEP
INSPECTION
ACTION
1
Does noise occur in all cases? Yes
Go to next step.
No
Go to step
4.
2
Is terminal 3A at audio unit connector of wiring
harness securely connected?
Yes Go to next step.
No Reconnect connector properly.
3 Determine cause of noise referring to
vehicle-induced noise diagnostic chart.
Remove part which causes noise.
Is noise suppresser or noise-preventive
capacitor installed near electrical system
which emits noise current?
Yes
Repair wiring harness between parts which causes noise
and ground.
No
Install noise suppresser or noise-preventive capacitor.
4
Does noise occur only when radio played? Yes
Go to next step.
No Go to malfunction symptom No.4.
5 When radio wave was received at another
position, did noise disappear?
Yes
Troubleshooting completed. (Cause of malfunction is
reception outside service area of radio station.)
No
Go to next step.
0 9 -0 1 N -9