Mazda CX 7. Manual — part 360
SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]
09-03D–9
09-03D
End Of Sie
5
• Turn the ignition switch to LOCK position.
• 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?
Yes
Repair or replace the related wiring harness or speaker unit.
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.
6
• Turn the ignition switch to LOCK position.
• Disconnect the audio amplifier connector
(40-pin) and audio unit connector (24-pin).
• Inspect the continuity between the audio
amplifier terminal 3N (40-pin, vehicle
harness-side) and audio unit terminal J (24-
pin, vehicle harness- side).
• Is there continuity?
Yes
Replace the audio amplifier.
No
Repair or replace the wiring harness between the audio
amplifier and audio unit.
Then go to the next step.
7
• Is there any sound?
Yes
The system is normal
No
Replace the audio amplifier.
STEP
INSPECTION
ACTION
1871-1U-06B(09-03D).fm 9 ページ 2006年3月15日 水曜日 午前11時45分
SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]
09-03D–10
NO.4 NO SOUND FROM CERTAIN SPEAKER[ENTIRE AUDIO SYSTEM]
id0903e2803300
Vehicles Without Bose
Diagnostic procedure
4
No sound from certain speaker/Possible DTC: —
Troubleshooting hints
• Speaker malfunction (e.g., any foreign material, broken)
• Audio unit malfunction
• Short circuit inside speaker
• Open or short circuit in wiring harness between audio unit and speaker
STEP
INSPECTION
ACTION
1
• Turn the audio unit to ON.
• Press both POWER and AUTO-M buttons
more than 0.2 seconds at the same time.
Note
• The sounded speaker now changes in
the order of left — front speaker, right
— front speaker, right — rear
speaker and left — rear speaker.
• Is there any speaker with no sound?
Yes
If no sound from some speaker:
• Go to the next step.
If no sound at all:
• Go to the troubleshooting of “No.3 No sound from all
speakers”.
No
The troubleshooting is completed.
2
• Turn the ignition switch to the LOCK position.
• Disconnect the audio unit connector (24-pin).
• Inspect the continuity between the audio unit
wiring harness-side connector (24-pin)
terminal and ground.
• Is there continuity?
Yes
Repair or replace the suspect wiring harness or speaker
unit.
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.
3
• Remove the suspect speaker.
• Disconnect the speaker connector (2-pin)
and inspect the resistance of speaker.
• Is the resistance normal?
Specification
Speaker resistance + wiring harness
resistance
Yes
Replace the audio unit.
No
Go to the next step.
4
• Inspect the wiring harness between the
audio unit and the suspect speaker.
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the suspect wiring harness.
5
• Inspect the suspect speaker.
• Is the speaker normal?
Note
• If the speaker lead wire contacts to either
ground or vehicle frame, replace the
speaker.
Yes
Replace the audio unit.
No
Go to the next step.
1871-1U-06B(09-03D).fm 10 ページ 2006年3月15日 水曜日 午前11時45分
SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]
09-03D–11
09-03D
Vehicles With Bose
Diagnostic procedure
4
No sound from certain speaker/Possible DTC: —
Troubleshooting hints
• Speaker malfunction (e.g., foreign material, broken)
• Audio amplifier malfunction
• Short circuit inside speaker
• Open or short circuit in wiring harness between audio amplifier and speaker
• Open or short circuit in wiring harness between audio amplifier and audio unit
• Poor connection of audio unit connector, terminal damage
• Poor connection of audio amplifier connector
STEP
INSPECTION
ACTION
1
• Turn the audio unit on.
• Press the POWER button and
simultaneously press down the AUTO-M
switch for 0.2 seconds.
Note
• This function outputs sound to each
speaker sequentially to allow
determination of which speaker is not
emitting sound.
• Is there any speaker with no sound?
Yes
If no sound from some speaker:
• Go to the next step.
If not sound at all:
• Go to the troubleshooting of “No.3 No sound from all
speakers”.
No
The troubleshooting completed. (The system is normal.)
2
• Does the same speaker have no sound if
changing the sound source? (Radio, CD)
Yes
Go to the next step.
No
Replace the audio unit.
(See 09-20-4 AUDIO UNIT REMOVAL/INSTALLATION.)
(See 09-20-5 AUDIO UNIT DISASSEMBLY/ASSEMBLY.)
Note
• If the different speaker has no sound now, the audio
unit is malfunctioning.
3
• Turn the ignition switch to the LOCK position.
• Inspect the connection of the audio unit
connector (24-pin). (for sound signal line)
• Is the connector connected securely?
Yes
Go to the next step.
No
Connect the audio unit connector (24-pin) securely.
4
• Turn the ignition switch to the LOCK position.
• Remove the audio unit.
• Disconnect the audio unit connector (24-pin).
• Inspect the continuity between the audio unit
wiring harness-side connector and ground.
— Terminal A (LH+)— GND
— Terminal C (LH-)— GND
— Terminal D (RH+)— GND
— Terminal F (RH-)— GND
• Is there continuity?
Yes
Go to the next step.
No
Go to Step 6.
5
• Inspect the continuity between the following
terminals of the audio amplifier wiring
harness-side connector (40-pin) and the
audio unit wiring harness-side connector (24-
pin).
For front speaker (audio unit— audio
amplifier)
— Terminal A (LH+)— Terminal 3L
— Terminal C (LH-)— Terminal 3J
— Terminal D (RH+)— Terminal K
— Terminal F (RH-)— Terminal I
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the related wiring harness between the
audio amplifier and the audio unit.
Then go to the next step.
6
• Inspect the connection of the audio amplifier
connector (40-pin).
• Is the connector connected securely?
Yes
Go to the next step.
No
Connect the audio amplifier (40-pin) securely.
1871-1U-06B(09-03D).fm 11 ページ 2006年3月15日 水曜日 午前11時45分
SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]
09-03D–12
7
• Turn the ignition switch to the LOCK position.
• Disconnect the audio amplifier connector
(40-pin).
• Inspect continuity between the following
terminals of the audio amplifier connector
and speaker connector.
For front speaker (LH)
— Terminal 2A (40-pin)— Terminal A
(speaker)
— Terminal 2B (40-pin)— Terminal B
(speaker)
For front speaker (RH)
— Terminal 2F (40-pin)— Terminal A
(speaker)
— Terminal 2D (40-pin)— Terminal B
(speaker)
For front door speaker (LH)
— Terminal 2N (40-pin)— Terminal A
(speaker)
— Terminal 2I (40-pin)— Terminal B
(speaker)
For front door speaker (RH)
— Terminal 2M (40-pin)— Terminal A
(speaker)
— Terminal 2R (40-pin)— Terminal B
(speaker)
For rear door speaker (LH)
— Terminal 2G (40-pin)— Terminal A
(speaker)
— Terminal 2I (40-pin)— Terminal B
(speaker)
For rear door speaker (RH)
— Terminal 2E (40-pin)— Terminal A
(speaker)
— Terminal 2C (40-pin)— Terminal B
(speaker)
For rear speaker (LH)
— Terminal 2J (40-pin)— Terminal A
(speaker)
— Terminal 2H (40-pin)— Terminal B
(speaker)
For rear speaker (RH)
— Terminal 1F (40-pin)— Terminal A
(speaker)
— Terminal 1H (40-pin)— Terminal B
(speaker)
For center speaker
— Terminal 1E (40-pin)— Terminal A
(speaker)
— Terminal 1G (40-pin)— Terminal B
(speaker)
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the repair related wiring harnesses.
STEP
INSPECTION
ACTION
1871-1U-06B(09-03D).fm 12 ページ 2006年3月15日 水曜日 午前11時45分
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