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

id0903e2818100


Without Bose®

4

No sound from some speakers

Possible DTC

—
Possible cause
•  Speaker muted by audio unit sound adjustment
•  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
•  Verify the audio unit sound adjustment.
•  Does the fader/balance operate?
Yes
The system is normal. Explain to the customer that the speaker is muted by the audio unit sound setting.
No
Go to the next step.
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
―  Terminal 1A (LH+)—GND
―  Terminal 1C (LH-)—GND
―  Terminal 1D (RH+)—GND
―  Terminal 1F (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
Audio unit—tweeter
―  Terminal 1A (LH+)—terminal B
―  Terminal 1C (LH-)—terminal A
―  Terminal 1D (RH+)—terminal B
―  Terminal 1F (RH-)—terminal A
•  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
With CD changer
•  Go to the next step.
With CD player
•  Replace the audio unit.
No
Replace the speaker.
(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)
(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)
(See TWEETER REMOVAL/INSTALLATION.)
6
•  Verify that all of the audio unit reset conditions for the customer's audio unit are met.
•  Are all of the audio unit reset conditions for the customer's audio unit met?
Yes
Perform the audio unit reset.
(See AUDIO UNIT RESET PROCEDURE [ENTIRE AUDIO SYSTEM].)
No
Replace the audio unit.
(See AUDIO UNIT REMOVAL/INSTALLATION.)
(See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)


With Bose®

4

No sound from some speakers

Possible DTC

—
Possible cause
•  Speaker muted by audio unit sound adjustment
•  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
•  Verify the audio unit sound adjustment.
•  Does the fader/balance operate?
Yes
The system is normal. Explain to the customer that the speaker is muted by the audio unit sound setting.
No
Go to the next step.
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
Repair or replace the related wiring harness
Note
•  If there is a short to ground in wiring harness between the audio unit and audio amplifier, the protector circuit inside the audio unit operates to cut the sound.
No
Go to the next step.
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 (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 (LH+)— Terminal 1H (L.H.D.)/1J (R.H.D.)
―  Terminal 1U (LH-)— Terminal 1G (L.H.D.)/1I (R.H.D.)
―  Terminal 1V (RH+)— Terminal 1J (L.H.D.)/1H (R.H.D.)
―  Terminal 1X (RH-)— 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.
Note
•  If there is a open in wiring harness between the audio unit and audio amplifier, the protector circuit inside the audio unit operates to cut the sound.
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 (L.H.D.)/3F (R.H.D.)—Terminal C
―  Terminal 3C (L.H.D.)/3E (R.H.D.)—Terminal B
For front door speaker (RH)
―  Terminal 3F (L.H.D.)/3D (R.H.D.)—Terminal C
―  Terminal 3E (L.H.D.)/3C (R.H.D.)—Terminal B
For tweeter (LH)
―  Terminal 3D (L.H.D.)/3F (R.H.D.)—Terminal B
―  Terminal 3C (L.H.D.)/3E (R.H.D.)—Terminal A
For tweeter (RH)
―  Terminal 3F (L.H.D.)/3D (R.H.D.)—Terminal B
―  Terminal 3E (L.H.D.)/3C (R.H.D.)—Terminal A
For rear door speaker (LH)
―  Terminal 2D (L.H.D.)/2M (R.H.D.)—Terminal C
―  Terminal 2B (L.H.D.)/2O (R.H.D.)—Terminal B
For rear door speaker (RH)
―  Terminal 2M (L.H.D.)/2D (R.H.D.)—Terminal C
―  Terminal 2O (L.H.D.)/2B (R.H.D.)—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 (LH)
―  Terminal 3D (L.H.D.)/3F (R.H.D.)—GND
―  Terminal 3C (L.H.D.)/3E (R.H.D.)—GND
For front door speaker (RH)
―  Terminal 3F (L.H.D.)/3D (R.H.D.)—GND
―  Terminal 3E (L.H.D.)/3C (R.H.D.)—GND
For tweeter (LH)
―  Terminal 3D (L.H.D.)/3F (R.H.D.)—GND
―  Terminal 3C (L.H.D.)/3E (R.H.D.)—GND
For tweeter (RH)
―  Terminal 3F (L.H.D.)/3D (R.H.D.)—GND
―  Terminal 3E (L.H.D.)/3C (R.H.D.)—GND
For rear door speaker (LH)
―  Terminal 2D (L.H.D.)/2M (R.H.D.)—GND
―  Terminal 2B (L.H.D.)/2O (R.H.D.)—GND
For rear door speaker (RH)
―  Terminal 2M (L.H.D.)/2D (R.H.D.)—GND
―  Terminal 2O (L.H.D.)/2B (R.H.D.)—GND
For front center speaker
―  Terminal 2I—Terminal B
―  Terminal 2K—Terminal A
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 SPEAKER REMOVAL/INSTALLATION.)
(See REAR CENTER 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)