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

id0903e2818100


Without Bose®

4

No sound from certain speaker

Possible DTC

—
POSSIBLECAUSE
•  Speaker malfunction (e.g., any foreign material, broken)
•  Audio unit malfunction (with audio system)
•  Car-navigation unit malfunction (with car-navigation system)
•  Short circuit inside speaker
•  Open or short circuit in wiring harness between audio unit/car-navigation unit and speaker

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?
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
•  Switch the ignition to off.
•  Disconnect the audio unit/car-navigation unit connector (24-pin).
•  Inspect the continuity between the audio unit/car-navigation 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
•  Switch the ignition to off.
•  Remove the audio unit or car-navigation unit.
•  Disconnect the audio unit or car-navigation unit connector (24-pin).
•  Inspect the continuity between the audio unit or car-navigation 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 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 or car-navigation unit operates to cut the sound.
4
•  Disconnect the speaker connector (4-pin) and inspect the resistance of speaker.
•  Inspect the continuity between the audio unit or car-navigation unit wiring harness-side connector terminal and speaker wiring harness-side connector:
Audio unit/car-navigation 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/car-navigation unit—rear door speaker
―  Terminal 1S (LH+) — terminal C
―  Terminal 1U (LH-) — terminal B
―  Terminal 1V (RH+) — terminal C
―  Terminal 1X (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 (with audio system).
(See AUDIO UNIT REMOVAL/INSTALLATION.)
Replace the car-navigation unit (with car-navigation system).
(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.


With Bose®

4

No sound from certain speaker

Possible DTC

—
POSSIBLECAUSE
•  Speaker malfunction (e.g., foreign material, broken)
•  Audio unit malfunction (with audio system)
•  Car-navigation unit malfunction (with car-navigation system)
•  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/car-navigation unit
•  Poor connection of audio unit connector, terminal damage
•  Poor connection of audio amplifier connector

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?
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 (with audio system).
(See AUDIO UNIT REMOVAL/INSTALLATION.)
Replace the car-navigation unit (with car-navigation system).
(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
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/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
•  Switch the ignition to off.
•  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 (FL+)—GND
―  Terminal 1C (FL-)—GND
―  Terminal 1D (FR+)—GND
―  Terminal 1F (FR-)—GND
―  Terminal 1S (RL+)—GND
―  Terminal 1U (RL-)—GND
―  Terminal 1V (RR+)—GND
―  Terminal 1X (RR-)—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 and the audio unit/car-navigation unit wiring harness-side connector (24-pin).
―  Terminal 1A (LH+)—Terminal 1D (L.H.D.)/1F (R.H.D.)
―  Terminal 1C (LH-)—Terminal 1C(L.H.D.)/1E (R.H.D.)
―  Terminal 1D (RH+)—Terminal 1F(L.H.D.)/1D (R.H.D.)
―  Terminal 1F (RH-)—Terminal 1E(L.H.D.)/1C (R.H.D.)
―  Terminal 1S (RL+)— Terminal 1H(L.H.D.)/1J (R.H.D.)
―  Terminal 1U (RL-)— Terminal 1G(L.H.D.)/1I (R.H.D.)
―  Terminal 1V (RR+)— Terminal 1J(L.H.D.)/1H (R.H.D.)
―  Terminal 1X (RR-)— Terminal 1I(L.H.D.)/1G (R.H.D.)
•  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
―  Terminal 3D (LH+, L.H.D)/3F (LH+, R.H.D.)—Terminal C
―  Terminal 3C (LH-, L.H.D)/3E (LH-, R.H.D.)—Terminal B
―  Terminal 3F (RH+, L.H.D)/3D (RH+, R.H.D.)—Terminal C
―  Terminal 3E (RH-, L.H.D)/3C (RH-, R.H.D.)—Terminal B
For tweeter
―  Terminal 3D (LH+, L.H.D)/3F (LH+, R.H.D.)—Terminal D
―  Terminal 3C (LH-, L.H.D)/3E (LH-, R.H.D.)—Terminal A
―  Terminal 3F (RH+, L.H.D)/3D (RH+, R.H.D.)—Terminal D
―  Terminal 3E (RH-, L.H.D)/3C (RH-, R.H.D.)—Terminal A
For rear door speaker
―  Terminal 2D (LH+, L.H.D)/2M (LH+, R.H.D.)—Terminal C
―  Terminal 2B (LH-, L.H.D)/2O (LH-, R.H.D.)—Terminal B
―  Terminal 2M (RH+, L.H.D)/2D (RH+, R.H.D.)—Terminal C
―  Terminal 2O (RH-, L.H.D)/2B (RH-, R.H.D.)—Terminal B
For center speaker
―  Terminal 2I (+)—Terminal B
―  Terminal 2K (-)—Terminal A
For rear speaker (4SD)
―  Terminal 3H (+)—Terminal B
―  Terminal 3G (-)—Terminal D
For bass-box(5HB/WGN)
―  Terminal 3H (+)—Terminal B/F
―  Terminal 3G (-)—Terminal C/D
•  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+, L.H.D)/3F (LH+, R.H.D.)—GND
―  Terminal 3C (LH-, L.H.D)/3E (LH-, R.H.D.)—GND
―  Terminal 3F (RH+, L.H.D)/3D (RH+, R.H.D.)—GND
―  Terminal 3E (RH-, L.H.D)/3C (RH-, R.H.D.)—GND
For tweeter
―  Terminal 3D (LH+, L.H.D)/3F (LH+, R.H.D.)—GND
―  Terminal 3C (LH-, L.H.D)/3E (LH-, R.H.D.)—GND
―  Terminal 3F (RH+, L.H.D)/3D (RH+, R.H.D.)—GND
―  Terminal 3E (RH-, L.H.D)/3C (RH-, R.H.D.)—GND
For rear door speaker
―  Terminal 2D (LH+, L.H.D)/2M (LH+, R.H.D.)—GND
―  Terminal 2B (LH-, L.H.D)/2O (LH-, R.H.D.)—GND
―  Terminal 2M (RH+, L.H.D)/2D (RH+, R.H.D.)—GND
―  Terminal 2O (RH-, L.H.D)/2B (RH-, R.H.D.)—GND
For center speaker
―  Terminal 2I (+)—GND
―  Terminal 2K (-)—GND
For rear speaker (4SD)
―  Terminal 3H (+)—GND
―  Terminal 3G (-)—GND
For bass-box (5HB/WGN)
―  Terminal 3H (+)—GND
―  Terminal 3G (-)—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 CENTER SPEAKER REMOVAL/INSTALLATION.)
(See TWEETER REMOVAL/INSTALLATION.)
(See REAR SPEAKER REMOVAL/INSTALLATION.)
(4SD)
(See BASS-BOX REMOVAL/INSTALLATION.)
(5HB/WGN)
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 amplifier.
(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)
No
Replace the speaker.
(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)
(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)
(See CENTER SPEAKER REMOVAL/INSTALLATION.)
(See TWEETER REMOVAL/INSTALLATION.)
(See REAR SPEAKER REMOVAL/INSTALLATION.)(4SD)
(See BASS-BOX REMOVAL/INSTALLATION.)(5HB/WGN)