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Mazda CX 7. Manual - part 361

SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]

09-03D–13

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.
(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.

Go to the next step.

• Remove the suspect speaker.

• 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.

Yes

Replace the audio amplifier.
(See 09-20-6 AUDIO AMPLIFIER REMOVAL/
INSTALLATION.)

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.)

STEP

INSPECTION

ACTION

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SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]

09-03D–14

NO.5 BROKEN SOUND OR POOR SOUND QUALITY[ENTIRE AUDIO SYSTEM]

id0903e2803400

Diagnostic procedure

Broken sound or poor sound quality/Possible DTC: 09:Er21

Troubleshooting hints

• Speaker malfunction (e.g., any foreign material, broken)

• Improper speaker installation

• Audio unit malfunction

• Vibration of door trim and/or package trim

STEP

INSPECTION

ACTION

• Is there broken sound or poor sound quality

from all speakers?

Yes

Go to the next step.

Go to the Step 5.

• Inspect the sound while adjusting the sound

volume.

• Is there broken sound or poor sound quality

between “15” and “20”?

Yes

Go to the next step.

The system is normal.

• Inspect the BASS/TREB.

• Is there poor sound quality at “-3 — +3” of

“BASS/TREB”?

Note

• When press the AUDIO CONT button for

a few seconds, BASS/TREB is set at “0”.

Yes

Go to the next step.

If there is broken sound at “+6— -6” of BASS/TREB with the
maximum volume, the system is normal.

• Attempt to duplicate the symptom on the

other vehicle.

• Is the sound better than the customer’s

vehicle?

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 does not
occurs:

— Replace the audio unit.

(See 09-20-4 AUDIO UNIT REMOVAL/

INSTALLATION.)

(See 09-20-5 AUDIO UNIT DISASSEMBLY/

ASSEMBLY.)

The system is normal.

• Identify the speaker with broken sound by

adjusting BAL/FADE.

• Is the suspect speaker installed upward?

Yes

Go to the Step 7.

Go to the next step.

• Inspect the speaker installation condition.

• Is the speaker installed properly?

Yes

Go to the next step.

Install the speaker properly.

• Remove the speaker.

• Is there any foreign material or damage on

the speaker?

Yes

Repair or replace the suspect speaker.

Go to the next step.

• Inspect the sound again.

• Is there broken sound?

Yes

Go to the next step.

Inspect the vibration from the door trim and/or package trim.
Repair or replace the suspect trim as necessary.

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SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]

09-03D–15

09-03D

End Of Sie

NO.6 SOUND BECOMES LOUD OR WEAK WHILE DRIVING THE VEHICLE[ENTIRE AUDIO SYSTEM]

id0903e2803500

Diagnostic procedure

• Replace with the speaker known to be good.

(e.g., swap right and left speakers)

• Does the broken sound appear at the same

location?

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.)

STEP

INSPECTION

ACTION

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.

STEP

INSPECTION

ACTION

• Does the ALC (Without Bose)/Audio Pilot

function (With Bose) turn on?

Yes

Go to the next step.

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.)

• Turn the ALC (Without Bose)/Audio Pilot

function (With Bose).

• Does the sound change while driving the

vehicle?

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.)

The system is normal.
Explains the ALC (Without Bose)/Audio Pilot function (with
Bose) to the customer.

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SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]

09-03D–16

End Of Sie

NO.7 ALC FUNCTION IS INOPERATIVE[ENTIRE AUDIO SYSTEM]

id0903e2803600

Diagnostic procedure

End Of Sie

NO.8 AUDIO PILOT FUNCTION IS INOPERATIVE[ENTIRE AUDIO SYSTEM]

id0903e2825100

Diagnostic procedure

ALC function is inoperative/Possible DTC: 16:Er12

Troubleshooting hints

• Audio unit malfunction

• CAN signal wiring harness malfunction

• Open or short circuit in vehicle speed signal wiring harness (e. g., instrument cluster)

Note

• Inspect the ALC function while driving the vehicle with playing the CD, etc.

STEP

INSPECTION

ACTION

• Turn the ALC function to ON.

• Inspect the ALC function operation when

driving the vehicle at ALC level 3.

• Does the ALC system operate properly?

Yes

The system is normal. Explains the ALC function to the
customer.

Go to the next step.

• Retrieve the DTCs from all vehicle modules

using the M-MDS or equivalent.

• Is there the following DTC displayed?

— Vehicle speed signal wiring harness

— CAN signal wiring harness

Yes

Go to the appropriate DTC inspection.

Replace the audio unit.

Audio Pilot function is inoperative

Troubleshooting hints

• Audio amplifier malfunction

• Open or short circuit in Mic unit signal wiring harness

• Open or short circuit in Audio Pilot signal wiring harness

STEP

INSPECTION

ACTION

• Turn the Audio Pilot function on.

• Inspect the Audio Pilot function operation

while driving the vehicle.

• Does the Audio Pilot system operation

properly?

Yes

The system is normal.
Explain the Audio Pilot function to the customer.

Go to the next step.

• Inspect the connection of the audio amplifier

connector (40-pin, Mic unit signal).

• Inspect both the audio amplifier wiring

harness-side connector terminal 3E and 3F
(40-pin) for a poor connection (such as
damaged/pulled-out pins, corrosion).

• Are all the pins normal?

Yes

Repair or replace the pins and/or the connector.

Go to the next step.

• Inspect the connection of the Mic unit

connector (2-pin).

• Inspect the Mic unit wiring harness-side

connector terminal A and B (2-pin) for poor
connection (such as damaged/pulled-out
pins, corrosion).

• Are all pins normal?

Yes

Repair or replace the pins and/or the connector.

Go to the next step.

• Inspect continuity between the following

terminals of the audio amplifier connector
and Mic unit connector.
— Terminal 2A (40-pin)— Terminal A (Mic

unit)

— Terminal 2B (40-pin)— Terminal B (Mic

unit)

• Is there continuity?

Yes

Inspect for open or short circuit.
Go to the next step.

Repair or replace for open circuit.

• Retrieve the DTCs from all vehicle modules

using the M-MDS or equivalent.

• Is there the following DTC displayed?

— Vehicle speed signal wiring harness

— CAN communication wiring harness

Yes

Go to the appropriate DTC inspection.

Replace the audio amplifier.
(See 09-20-6 AUDIO AMPLIFIER REMOVAL/
INSTALLATION.)

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Content .. 359 360 361 362 ..