NO.3 NO SOUND FROM ALL SPEAKERS [ENTIRE AUDIO SYSTEM]

id0903e2803200


Without Bose®

3

No sound from all speakers

Possible DTC

With M-MDS

U3003:16, U3000:09

Without M-MDS
Audio unit
•  09:Er20
•  09:Er21
Car-navigation unit
•  Device code 09/Error code 20
•  Device code 09/Error code 21
POSSIBLECAUSE
•  Short circuit in wiring harness between audio unit and speaker
•  Short circuit inside speaker
•  Speaker malfunction
•  Audio unit/car-navigation unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Play the CD or Radio.
•  Adjust the volume between”10” to “15”.
•  Is there sound?
Yes
The system is normal.
No
Go to the next step.
2
•  Switch the ignition to off.
•  Remove the audio unit.
•  Disconnect the audio 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 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 speaker.
•  Disconnect the speaker connector (4-pin).
•  Inspect the continuity between the speaker wiring harness-side connector (4-pin) terminal and ground:
For each speaker
―  Terminal C — GND
―  Terminal B — GND
•  Is there continuity?
Yes
Replace the speaker.
No
Replace the audio unit/car-navigation unit
(See AUDIO UNIT REMOVAL/INSTALLATION.)
(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)


With Bose®

3

No sound from all speakers

Possible DTC

With M-MDS

U3003:16, U3000:09

Without M-MDS
Audio unit
•  09:Er20
•  09:Er21
Car-navigation unit
•  Device code 09/Error code 20
•  Device code 09/Error code 21
POSSIBLECAUSE
•  Speaker malfunction
•  Audio amplifier malfunction
•  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
•  Short circuit inside speaker

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Play CD or radio.
•  Adjust the volume between “10” and “15”.
•  Is there sound?
Yes
The system is normal.
No
Go to the next step.
2
•  Measure the voltage at the audio amplifier terminal 3A (8-pin, vehicle harness-side)
•  Is the voltage B+?
Yes
Go to Step 4.
No
Repair or replace wiring harness between the audio amplifier and fuse.
(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)
Go to the next step.
3
•  Is there any sound?
Yes
The system is normal.
No
Go to the next step.
4
•  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 B
―  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 B
―  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 rear speaker(4SD)
―  Terminal 3H (LH+)—Terminal B
―  Terminal 3G (LH-)—Terminal A
For bass-box(5HB/WGN)
―  Terminal 3H (+)—Terminal B/F
―  Terminal 3G (-)—Terminal C/D
For center speaker
―  Terminal 2I (+)—Terminal B
―  Terminal 2K (-)—Terminal A
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the repair related wiring harnesses.
5
•  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 front speaker 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 rear speaker(4SD)
―  Terminal 3H (LH+)—GND
―  Terminal 3G (LH-)—GND
For bass-box(5HB/WGN)
―  Terminal 3H—GND
―  Terminal 3G—GND
For center speaker
―  Terminal 2I (+)—GND
―  Terminal 2K (-)—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/car-navigation unit operates to cut the sound.
No
Go to the next step.
6
•  Switch the ignition to off.
•  Disconnect the audio amplifier connector and audio unit/car-navigation unit connector (24-pin).
•  Inspect the continuity between the audio amplifier terminal 1A (16-pin, vehicle harness-side) and audio unit/car-navigation unit terminal 1J (24-pin, vehicle harness- side).
•  Is there continuity?
Yes
Replace the audio amplifier.
No
Repair or replace the wiring harness between the audio amplifier and audio unit/car-navigation unit.
Then go to the next step.
7
•  Is there any sound?
Yes
The system is normal.
No
Replace the audio amplifier.
(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)