NO.4 NO SOUND FROM SOME SPEAKERS [ENTIRE AUDIO SYSTEM]

id0903e2818100


Without Bose®

4

No sound from some speakers

Possible DTC

—
Possible cause
•  Open or short circuit in wiring harness between audio unit and speaker
•  Speaker malfunction (e.g., any foreign material, broken)
•  Short circuit inside speaker
•  Audio unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Switch the ignition to ACC or ON.
•  Turn the audio unit power to ON.
•  While pressing the POWER/VOLUME switch, simultaneously press the AUTO-M switch for 0.2 s or more.
•  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
•  Switch the ignition to off.
•  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.
3
•  Switch the ignition to off.
•  Remove the audio unit.
•  Disconnect the audio unit connector (24-pin).
•  Inspect the continuity between the audio unit wiring harness-side connector terminal and ground:
For front door speaker
―  Terminal 1A (LH+)—GND
―  Terminal 1C (LH-)—GND
―  Terminal 1D (RH+)—GND
―  Terminal 1F (RH-)—GND
For rear door speaker
―  Terminal 1S (LH+)—GND
―  Terminal 1U (LH-)—GND
―  Terminal 1V (RH+)—GND
―  Terminal 1X (RH-)—GND
•  Disconnect the front door speaker connector (4-pin)
•  Inspect the continuity between the front door speaker wiring harness-side connector terminal and ground:
For tweeter
―  Front door speaker (LH) terminal A (LH+)—GND
―  Front door speaker (LH) terminal D (LH-)—GND
―  Front door speaker (RH) terminal A (RH+)—GND
―  Front door speaker (RH) terminal D (RH-)—GND
•  Is there continuity?
Yes
Repair or replace the suspect wiring harness or speaker unit.
No
Go to the next step.
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.
4
•  Disconnect the speaker connector (4-pin), tweeter connector (2-pin) and inspect the resistance of speaker.
•  Inspect the continuity between the audio unit wiring harness-side connector terminal and speaker wiring harness-side connector:
Audio unit—front door speaker
―  Terminal 1A (LH+)—terminal C
―  Terminal 1C (LH-)—terminal B
―  Terminal 1D (RH+)—terminal C
―  Terminal 1F (RH-)—terminal B
Audio unit—rear door speaker
―  Terminal 1S (LH+)—terminal C
―  Terminal 1U (LH-)— terminal B
―  Terminal 1V (RH+)—terminal C
―  Terminal 1X (RH-)—terminal B
Front door speaker—tweeter
―  Terminal A (LH+)—terminal A
―  Terminal D (LH-)—terminal B
―  Terminal A (RH+)—terminal A
―  Terminal D (RH-)—terminal B
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the suspect wiring harness or speaker unit.
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.
(See AUDIO UNIT REMOVAL/INSTALLATION.)
(See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)
No
Replace the speaker.


With Bose®

4

No sound from some speakers

Possible DTC

—
Possible cause
•  Poor connection of audio unit connector, terminal damage
•  Poor connection of audio amplifier connector
•  Open or short circuit in wiring harness between audio amplifier and audio unit
•  Open or short circuit in wiring harness between audio amplifier and speaker
•  Audio unit malfunction
•  Short circuit inside speaker
•  Speaker malfunction (e.g., foreign material, broken)

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Switch the ignition to ACC or ON.
•  Turn the audio unit power to ON.
•  While pressing the POWER/VOLUME switch, simultaneously press the AUTO-M switch for 0.2 s or more.
•  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 AUDIO UNIT REMOVAL/INSTALLATION.)
(See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)
Note
•  If the different speaker has no sound now, the audio unit is malfunctioning.
3
•  Switch the ignition to off.
•  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
•  Switch the ignition to off.
•  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 1A (LH+)—GND
―  Terminal 1C (LH-)—GND
―  Terminal 1D (RH+)—GND
―  Terminal 1F (RH-)—GND
―  Terminal 1S (LH+)—GND
―  Terminal 1U (LH-)—GND
―  Terminal 1V (RH+)—GND
―  Terminal 1X (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 (16-pin) and the audio unit wiring harness-side connector (24-pin).
―  Terminal 1A (LH+)—Terminal 1D
―  Terminal 1C (LH-)—Terminal 1C
―  Terminal 1D (RH+)—Terminal 1F
―  Terminal 1F (RH-)—Terminal 1E
―  Terminal 1S (LH+)— Terminal 1H
―  Terminal 1U (LH-)— Terminal 1G
―  Terminal 1V (RH+)— Terminal 1J
―  Terminal 1X (RH-)— Terminal 1I
•  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.
•  Is the connector connected securely?
Yes
Go to the next step.
No
Connect the audio amplifier securely.
7
•  Switch the ignition to off.
•  Disconnect the audio amplifier connector.
•  Inspect continuity between the following terminals of the audio amplifier connector and speaker connector.
For front door speaker (LH)
―  Terminal 3D—Terminal C
―  Terminal 3C—Terminal B
For front door speaker (RH)
―  Terminal 3F—Terminal C
―  Terminal 3E—Terminal B
For tweeter (LH)
―  Front door speaker terminal D—Terminal B
―  Front door speaker terminal A—Terminal A
For tweeter (RH)
―  Front door speaker terminal D—Terminal B
―  Front door speaker terminal A—Terminal A
For rear door speaker (LH)
―  Terminal 2D—Terminal C
―  Terminal 2B—Terminal B
For rear door speaker (RH)
―  Terminal 2M—Terminal C
―  Terminal 2O—Terminal B
For front center speaker
―  Terminal 2I—Terminal B
―  Terminal 2K—Terminal A
For rear center speaker (4SD)/Bass-box (5HB)
―  Terminal 3H—Terminal B
―  Terminal 3G—Terminal D
For rear speaker
―  Terminal 2E—Terminal B
―  Terminal 2G—Terminal A
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the repair related wiring harnesses.
8
•  Switch the ignition to off.
•  Disconnect the audio amplifier connector.
•  Inspect the continuity between the audio amplifier connector and ground:
For front door speaker
―  Terminal 3D (LH+)—GND
―  Terminal 3C (LH-)—GND
―  Terminal 3F (RH+)—GND
―  Terminal 3E (RH-)—GND
For tweeter
―  Terminal 3D (LH+)—GND
―  Terminal 3C (LH-)—GND
―  Terminal 3F (RH+)—GND
―  Terminal 3E (RH-)—GND
For rear door speaker
―  Terminal 2D (LH+)—GND
―  Terminal 2B (LH-)—GND
―  Terminal 2M (RH+)—GND
―  Terminal 2O (RH-)—GND
For front center speaker
―  Terminal 2I (+)—GND
―  Terminal 2K (-)—GND
For rear center speaker (4SD)/Bass-box (5HB)
―  Terminal 3H (+)—GND
―  Terminal 3G (-)—GND
For rear speaker
―  Terminal 2E—GND
―  Terminal 2G—GND
•  Is there continuity?
Yes
Repair or replace the related wiring harness or speaker.
(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)
(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)
(See FRONT CENTER SPEAKER REMOVAL/INSTALLATION.)
(See TWEETER REMOVAL/INSTALLATION.)
(See REAR CENTER SPEAKER REMOVAL/INSTALLATION.)
(See REAR SPEAKER REMOVAL/INSTALLATION.) (4SD)
(See BASS-BOX REMOVAL/INSTALLATION.) (5HB)
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
•  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.
(See AUDIO UNIT REMOVAL/INSTALLATION.)
(See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)
No
Replace the speaker.
(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)
(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)
(See FRONT CENTER SPEAKER REMOVAL/INSTALLATION.)
(See TWEETER REMOVAL/INSTALLATION.)
(See REAR SPEAKER REMOVAL/INSTALLATION.)
(See REAR CENTER SPEAKER REMOVAL/INSTALLATION.) (4SD)
(See BASS-BOX REMOVAL/INSTALLATION.) (5HB)