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

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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 (without display)/SCAN switch (with display) for 0.5 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 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
•  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 (without display)/SCAN switch (with display) for 0.5 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.
(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 is malfunctioning.
3
•  Turn the ignition switch to the LOCK position.
•  Inspect the connection of the audio unit/car-navigation unit 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 connector (24-pin) securely.
4
•  Turn the ignition switch to the LOCK position.
•  Remove the audio unit/car-navigation unit.
•  Disconnect the audio unit/car-navigation unit connector (24-pin).
•  Inspect the continuity between the audio unit/car-navigation unit 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 wiring harness-side connector (24-pin).
―  Terminal 1A (LH+)—Terminal 2L
―  Terminal 1C (LH-)—Terminal 2J
―  Terminal 1D (RH+)—Terminal 2K
―  Terminal 1F (RH-)—Terminal 2I
•  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.
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 3L (LH+)—Terminal B
―  Terminal 3N (LH-)—Terminal A
―  Terminal 3K (RH+)—Terminal B
―  Terminal 3M (RH-)—Terminal A
For front speaker
―  Terminal 3B (LH+)—Terminal B
―  Terminal 3A (LH-)—Terminal A
―  Terminal 3D (RH+)—Terminal B
―  Terminal 3F (RH-)—Terminal A
For rear door speaker
―  Terminal 3I (LH+)—Terminal B
―  Terminal 3G (LH-)—Terminal A
―  Terminal 3C (RH+)—Terminal B
―  Terminal 3E (RH-)—Terminal A
For rear speaker
―  Terminal 4G (LH+)—Terminal B
―  Terminal 4E (LH-)—Terminal A
―  Terminal 4D (RH+)—Terminal B
―  Terminal 4C (RH-)—Terminal A
For center speaker
―  Terminal 3H (+)—Terminal B
―  Terminal 3J (-)—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 3L (LH+)—GND
―  Terminal 3N (LH-)—GND
―  Terminal 3K (RH+)—GND
―  Terminal 3M (RH-)—GND
For front speaker
―  Terminal 3B (LH+)—GND
―  Terminal 3A (LH-)—GND
―  Terminal 3D (RH+)—GND
―  Terminal 3F (RH-)—GND
For rear door speaker
―  Terminal 3I (LH+)—GND
―  Terminal 3G (LH-)—GND
―  Terminal 3C (RH+)—GND
―  Terminal 3E (RH-)—GND
For rear speaker
―  Terminal 4G (LH+)—GND
―  Terminal 4E (LH-)—GND
―  Terminal 4D (RH+)—GND
―  Terminal 4C (RH-)—GND
For center speaker
―  Terminal 3H (+)—GND
―  Terminal 3J (-)—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 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.
(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.)