Mazda CX-7 2007 Workshop Manual page 1441

SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]
STEP
• Turn the ignition switch to LOCK position.
8
• Disconnect the audio amplifier connector
(40-pin).
• Inspect the continuity between the audio
amplifier connector and ground:
For front speaker
— Terminal 2A (40-pin, FRONT IP L SP-)—
GND
— Terminal 2B (40-pin, FRONT IP L SP+)—
GND
— Terminal 2F (40-pin, FRONT IP R SP-)—
GND
— Terminal 2D (40-pin, FRONT IP R SP+)—
GND
For front door speaker
— Terminal 2N (40-pin, FRONT DOOR L
SP-)— GND
— Terminal 2I (40-pin, FRONT DOOR L
SP+)— GND
— Terminal 2M (40-pin, FRONT DOOR R
SP-)— GND
— Terminal 2R (40-pin, FRONT DOOR R
SP-)— GND
For rear door speaker
— Terminal 2G (40-pin, REAR DOOR L SP-
)— GND
— Terminal 2I (40-pin, REAR DOOR L
SP+)— GND
— Terminal 2E (40-pin, REAR DOOR R SP-
)— GND
— Terminal 2C (40-pin, REAR DOOR R
SP+)— GND
For rear speaker
— Terminal 2J (40-pin, D-PILLAR L SP-)—
GND
— Terminal 2H (40-pin, D-PILLAR L SP+)—
GND
— Terminal 1F (40-pin, D-PILLAR R SP-)—
GND
— Terminal 1H (40-pin, D-PILLAR R SP+)—
GND
For center speaker
— Terminal 1E (40-pin, DASH CENTER -)—
GND
— Terminal 1G (40-pin, DASH CENTER +)—
GND
• Is there continuity?
• Remove the suspect speaker.
9
• Disconnect the speaker connector (2-pin)
and inspect the resistance of speaker.
Specification:
Speaker resistance + wiring
resistance
Note
• If the speaker lead wire contacts to
either ground or vehicle frame, replace
the speaker.
End Of Sie
INSPECTION
Yes Repair or replace the related wiring harness or speaker unit.
(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.)
Note
• If there is a short circuit between the speaker harness
or speaker lead wire and ground, the protector circuit
inside the audio unit operates to cut the sound.
No Go to the next step.
Yes Replace the audio amplifier.
(See 09-20-6 AUDIO AMPLIFIER REMOVAL/
INSTALLATION.)
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.)
ACTION
09-03D–13
09-03D