Mazda CX-7 2007 Workshop Manual page 1443

SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]
STEP
• Replace with the speaker known to be good.
9
(e.g., swap right and left speakers)
• Does the broken sound appear at the same
location?
End Of Sie
NO.6 SOUND BECOMES LOUD OR WEAK WHILE DRIVING THE VEHICLE[ENTIRE AUDIO SYSTEM]
6 Sound becomes loud or weak while driving the vehicle/Possible DTC: —
Troubleshooting hints
• Audio unit malfunction (without Bose)
• Audio amplifier malfunction (with Bose)
Note
• Inspect the ALC function (with Bose)/Audio pilot function (with Bose) while driving the vehicle with playing the CD, etc.
Diagnostic procedure
STEP
• Does the ALC (Without Bose)/Audio Pilot
1
function (With Bose) turn on?
• Turn the ALC (Without Bose)/Audio Pilot
2
function (With Bose).
• Does the sound change while driving the
vehicle?
INSPECTION
INSPECTION
Yes Without Bose:
Replace the audio unit.
(See 09-20-4 AUDIO UNIT REMOVAL/INSTALLATION.)
(See 09-20-5 AUDIO UNIT DISASSEMBLY/
ASSEMBLY.)
With Bose:
• If noise occurs from the speaker of a specific channel, or
the volume is minimized and the noise occurs:
— Replace the audio amplifier.
(See 09-20-6 AUDIO AMPLIFIER REMOVAL/
INSTALLATION.)
• If noise occurs from the speaker of two or more channels
or the volume is minimized and the noise dose not
occurs:
— Replace the audio unit.
(See 09-20-4 AUDIO UNIT REMOVAL/
INSTALLATION.)
(See 09-20-5 AUDIO UNIT DISASSEMBLY/
ASSEMBLY.)
No Replace the speaker.
(See 09-20-6 FRONT DOOR SPEAKER REMOVAL/
INSTALLATION.)
(See 09-20-8 REAR SPEAKER REMOVAL/
INSTALLATION.)
(See 09-20-9 CENTER SPEAKER REMOVAL/
INSTALLATION.)
(See 09-20-8 FRONT SPEAKER REMOVAL/
INSTALLATION.)
(See 09-20-8 REAR SPEAKER REMOVAL/
INSTALLATION.)
Yes Go to the next step.
No Without Bose:
Replace the audio unit.
(See 09-20-4 AUDIO UNIT REMOVAL/INSTALLATION.)
(See 09-20-5 AUDIO UNIT DISASSEMBLY/
ASSEMBLY.)
With Bose:
Replace the audio amplifier.
(See 09-20-6 AUDIO AMPLIFIER REMOVAL/
INSTALLATION.)
Yes Without Bose:
Replace the audio unit.
(See 09-20-4 AUDIO UNIT REMOVAL/INSTALLATION.)
(See 09-20-5 AUDIO UNIT DISASSEMBLY/
ASSEMBLY.)
With Bose:
Replace the audio amplifier.
(See 09-20-6 AUDIO AMPLIFIER REMOVAL/
INSTALLATION.)
No The system is normal.
Explains the ALC (Without Bose)/Audio Pilot function (with
Bose) to the customer.
ACTION
id0903e2803500
ACTION
09-03D–15
09-03D