NO.4 NO SOUND FROM SOME SPEAKERS [ENTIRE AUDIO SYSTEM]SM2446102
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
• Turn the ignition switch to the ACC or ON position.
• 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
• 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.
3
• 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 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
• Is there continuity?
Yes
Repair or replace the suspect wiring harness or speaker.
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 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 B
― Terminal 1C (LH-)—terminal A
― Terminal 1D (RH+)—terminal B
― Terminal 1F (RH-)—terminal A
Audio unit—rear door speaker
― Terminal 1S (LH+)—terminal B
― Terminal 1U (LH-)— terminal A
― Terminal 1V (RH+)—terminal B
― Terminal 1X (RH-)—terminal A
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the suspect wiring harness or speaker.
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.)
No
Replace the speaker.


With Bose®

4

No sound from some speakers

Possible DTC

—
Possible cause
• Poor connection of audio unit/car-navigation unit (without integrated multi information display) connector, terminal damage
• Poor connection of audio amplifier connector
• Open or short circuit in wiring harness between audio amplifier and audio unit/car-navigation unit (without integrated multi information display)
• 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
• Turn the ignition switch to the ACC or ON position.
• 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/car-navigation unit (without integrated multi information display).
(See AUDIO UNIT REMOVAL/INSTALLATION.)
(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
Note
• If the different speaker has no sound now, the audio unit/car-navigation unit (without integrated multi information display) is malfunctioning.
3
• Turn the ignition switch to the LOCK position.
• Inspect the connection of the audio unit/car-navigation unit (without integrated multi information display) connector (24-pin). (for sound signal line)
• Is the connector connected securely?
Yes
Go to the next step.
No
Connect the audio unit/car-navigation unit (without integrated multi information display) connector (24-pin) securely.
4
• Turn the ignition switch to the LOCK position.
• Remove the audio unit/car-navigation unit (without integrated multi information display).
• Disconnect the audio unit/car-navigation unit (without integrated multi information display) connector (24-pin).
• Inspect the continuity between the audio unit/car-navigation unit (without integrated multi information display) wiring harness-side connector and ground.
― Terminal 1A (LH+)—GND
― Terminal 1C (LH-)—GND
― Terminal 1D (RH+)—GND
― Terminal 1F (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 connect (16-pin) and the audio unit/car-navigation unit (without integrated multi information display) wiring harness-side connector (24-pin).
― Terminal 1A (LH+)—Terminal 1L
― Terminal 1C (LH-)—Terminal 1J
― Terminal 1D (RH+)—Terminal 1K
― Terminal 1F (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/car-navigation unit (without integrated multi information display).
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
• Turn the ignition switch to the LOCK position.
• Disconnect the audio amplifier connector.
• Inspect continuity between the following terminals of the audio amplifier connector and speaker connector.
For front door speaker
― Terminal 2L (LH+)—Terminal B
― Terminal 2N (LH-)—Terminal A
― Terminal 2K (RH+)—Terminal B
― Terminal 2M (RH-)—Terminal A
For front speaker
― Terminal 2B (LH+)—Terminal B
― Terminal 2A (LH-)—Terminal A
― Terminal 2D (RH+)—Terminal B
― Terminal 2F (RH-)—Terminal A
For rear door speaker
― Terminal 2I (LH+)—Terminal B
― Terminal 2G (LH-)—Terminal A
― Terminal 2C (RH+)—Terminal B
― Terminal 2E (RH-)—Terminal A
For rear speaker
― Terminal 2H (LH+)—Terminal B
― Terminal 2J (LH-)—Terminal A
― Terminal 3H (RH+)—Terminal B
― Terminal 3F (RH-)—Terminal A
For center speaker
― Terminal 3G (+)—Terminal B
― Terminal 3E (-)—Terminal A
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the repair related wiring harnesses.
8
• Turn the ignition switch to the LOCK position.
• Disconnect the audio amplifier connector.
• Inspect the continuity between the audio amplifier connector and ground:
For front door speaker
― Terminal 2L (LH+)—GND
― Terminal 2N (LH-)—GND
― Terminal 2K (RH+)—GND
― Terminal 2M (RH-)—GND
For front speaker
― Terminal 2B (LH+)—GND
― Terminal 2A (LH-)—GND
― Terminal 2D (RH+)—GND
― Terminal 2F (RH-)—GND
For rear door speaker
― Terminal 2I (LH+)—GND
― Terminal 2G (LH-)—GND
― Terminal 2C (RH+)—GND
― Terminal 2E (RH-)—GND
For rear speaker
― Terminal 2H (LH+)—GND
― Terminal 2J (LH-)—GND
― Terminal 3H (RH+)—GND
― Terminal 3F (RH-)—GND
For center speaker
― Terminal 3G (+)—GND
― Terminal 3E (-)—GND
• Is there continuity?
Yes
Repair or replace the related wiring harness or speaker.
(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)
(See FRONT SPEAKER REMOVAL/INSTALLATION.)
(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)
(See REAR SPEAKER REMOVAL/INSTALLATION.)
(See CENTER 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/car-navigation unit (without integrated multi information display) 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/car-navigation unit (without integrated multi information display).
(See AUDIO UNIT REMOVAL/INSTALLATION.)
(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
No
Replace the speaker.
(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)
(See FRONT SPEAKER REMOVAL/INSTALLATION.)
(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)
(See REAR SPEAKER REMOVAL/INSTALLATION.)
(See CENTER SPEAKER REMOVAL/INSTALLATION.)