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Mazda CX 7. Manual - part 360

SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]

09-03D–9

09-03D

End Of Sie

• 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.

Go to the next step.

• 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.

Repair or replace the wiring harness between the audio
amplifier and audio unit.
Then go to the next step.

• Is there any sound?

Yes

The system is normal

Replace the audio amplifier.

STEP

INSPECTION

ACTION

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SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]

09-03D–10

NO.4 NO SOUND FROM CERTAIN SPEAKER[ENTIRE AUDIO SYSTEM]

id0903e2803300

Vehicles Without Bose

Diagnostic procedure

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

• 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”.

The troubleshooting is completed.

• 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.

Go to the next step.

• 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.

Go to the next step.

• Inspect the wiring harness between the

audio unit and the suspect speaker.

• Is there continuity?

Yes

Go to the next step.

Repair or replace the suspect wiring harness.

• 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.

Go to the next step.

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SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]

09-03D–11

09-03D

Vehicles With Bose

Diagnostic procedure

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

• 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”.

The troubleshooting completed. (The system is normal.)

• Does the same speaker have no sound if

changing the sound source? (Radio, CD)

Yes

Go to the next step.

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.

• 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.

Connect the audio unit connector (24-pin) securely.

• 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.

Go to Step 6.

• 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.

Repair or replace the related wiring harness between the
audio amplifier and the audio unit.
Then go to the next step.

• Inspect the connection of the audio amplifier

connector (40-pin).

• Is the connector connected securely?

Yes

Go to the next step.

Connect the audio amplifier (40-pin) securely.

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SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]

09-03D–12

• 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.

Repair or replace the repair related wiring harnesses.

STEP

INSPECTION

ACTION

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