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


id0903e2803300


Vehicles Without Bose®

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

Diagnostic procedure

STEP

INSPECTION

ACTION

1
•  Turn the audio unit to ON.
•  Press both POWER and AUTO-M buttons more than 0.2 s 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.


Vehicles With Bose®

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

Diagnostic procedure

STEP

INSPECTION

ACTION

1
•  Turn the audio unit on.
•  Press the POWER button and simultaneously press down the AUTO-M switch for 0.2 s.
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.
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.
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.
8
•  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.
9
•  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.
No
Replace the speaker.