NO.4 NO SOUND FROM SOME SPEAKERS [AUDIO]

id0903e1818100


Vehicles Without Bose®

4

No sound from some speaker/Possible DTC: —
Troubleshooting hints
•  Open or short circuit in wiring harness between audio unit/car-navigation unit and speaker
•  Short circuit inside speaker
•  Speaker malfunction (e.g., any foreign material, broken)
•  Audio unit/car-navigation unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Turn the audio unit/car-navigation unit power to ON.
•  Press AUDIO CONT switch more than one second (BAL/FAD cancel mode).
•  Press the POWER/VOLUME switch and simultaneously press down the AUTO-M switch for approx. 2 seconds.
Note
•  The sound 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
•  Turn the ignition switch to the LOCK position.
•  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 the 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/car-navigation unit operates to cut the sound.
No
Go to the next step.
3
•  Remove the suspect speaker.
•  Disconnect the speaker connector (2-pin) and inspect the resistance of speaker.
•  Is the resistance normal?
Specification
Speaker resistance + wiring harness resistance
Yes
Replace the audio unit/car-navigation unit.
(See CENTER PANEL UNIT REMOVAL/INSTALLATION.)
(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)
No
Go to the next step.
4
•  Inspect the wiring harness between the audio unit/car-navigation unit and the suspect speaker.
•  Is there the continuity?
Yes
Go to the next step
No
Repair or replace the suspect wiring harness.
5
•  Inspect the suspect speaker.
•  Is the speaker normal?
Note
•  If the speaker lead wire contacts either ground or vehicle frame, replace the speaker.
Yes
Replace the audio unit/car-navigation unit.
(See CENTER PANEL UNIT REMOVAL/INSTALLATION.)
(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)
No
Replace the speaker.


Vehicles With Bose®

4

No sound from certain speaker/Possible DTC: —
Troubleshooting hints
•  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
•  Short circuit inside speaker
•  Speaker malfunction (e.g., foreign material, broken)
•  Audio amplifier malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Turn the audio unit/car-navigation unit power to ON.
•  Press AUDIO CONT switch 1 second (BAL/FED cancel mode).
•  Press the POWER/VOLUME switch and simultaneously press down the AUTO-M switch for approx. 2 seconds.
Note
•  The speaker from which the sound is not emitted is specified using by that the speaker voice changes.
•  Is there any speaker with no sound?
Yes
If no sound from some speakers:
•  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 CENTER PANEL UNIT REMOVAL/INSTALLATION.)
(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)
Note
•  If a 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.
For front door speaker
―  Terminal 1A (LH+) — GND
―  Terminal 1C (LH-) — GND
―  Terminal 1D (RH+) — GND
―  Terminal 1F (RH-) — GND
For rear speaker
―  Terminal 1S (LH+) — GND
―  Terminal 1U (LH-) — GND
―  Terminal 1V (RH+) — GND
―  Terminal 1X (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 connector (24-pin) and the audio unit/car-navigation unit wiring harness-side connector (24-pin).
For front door speaker (audio amplifier - audio unit/car-navigation unit)
―  Terminal 1A (LH+) — Terminal 3D
―  Terminal 1C (LH-) — Terminal 3C
―  Terminal 1D (RH+) — Terminal 3F
―  Terminal 1F (RH-) — Terminal 3E
For rear speaker (audio amplifier - audio unit/car-navigation unit)
―  Terminal 1S (LH+) — Terminal 3H
―  Terminal 1U (LH-) — Terminal 3G
―  Terminal 1V (RH+) —Terminal 3J
―  Terminal 1X (RH-) — Terminal 3I
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the related wiring harnesses 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 (24-pin, 8-pin).
•  Is the connector connected securely?
Yes
Go to the next step.
No
Connect the audio amplifier (24-pin, 8-pin) securely.
7
•  Turn the ignition switch to LOCK position.
•  Disconnect the audio amplifier connector (8-pin, 16-pin).
•   Inspect continuity between the following terminals of the audio amplifier connector and speaker connector.
For front door speaker (LH)
―  Terminal 2B (16-pin) — Terminal D
―  Terminal 2D (16-pin) — Terminal C
For front tweeter (LH)
―  Terminal 2K (16-pin) — Terminal A
―  Terminal 2I (16-pin) — Terminal B
For front door speaker (RH)
―  Terminal 2O (16-pin) — Terminal D
―  Terminal 2M (16-pin) — Terminal C
For front tweeter (RH)
―  Terminal 2G (16-pin) — Terminal A
―  Terminal 2E (16-pin) — Terminal B
For rear speaker/tweeter (LH)
―  Terminal 1C (8-pin) — Terminal A(speaker)/terminal A (tweeter)
―  Terminal 1D (8-pin) — Terminal B(speaker)/terminal B (tweeter)
For rear speaker/tweeter (RH)
―  Terminal 1E (8-pin) — Terminal A(speaker)/terminal A (tweeter)
―  Terminal 1F (8-pin) — Terminal B(speaker)/terminal B (tweeter)
For center speaker
―  Terminal 1G (8-pin) — Terminal A
―  Terminal 1H (8-pin) — Terminal B
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the repair related wiring harnesses.
8
•  Turn the ignition switch to LOCK position
•  Disconnect the audio amplifier connector (8-pin, 16-pin).
•  Inspect the continuity between the audio amplifier connector and ground:
For front door speaker
―  Terminal 2D (16-pin, LH OUT+) — GND
―  Terminal 2B (16-pin, LH OUT-) — GND
―  Terminal 2O (16-pin, RH OUT+) — GND
―  Terminal 2M (16-pin, RH OUT-) — GND
For front tweeter
―  Terminal 2I (16-pin, LH OUT+) — GND
―  Terminal 2K (16-pin, LH OUT-) — GND
―  Terminal 2E (16-pin, RH OUT+) —GND
―  Terminal 2G (16-pin, RH OUT-) — GND
For rear speaker/tweeter
―  Terminal 1D (8-pin, LH OUT+) — GND
―  Terminal 1C (8-pin, LH OUT-) — GND
―  Terminal 1F (8-pin, RH OUT+) — GND
―  Terminal 1E (8-pin, RH OUT-) — GND
For center speaker
―  Terminal 1H (8-pin, CENTER OUT+)—GND
―  Terminal 1G (8-pin, CENTER OUT-)—GND
•  Is there continuity?
Yes
Repair or replace the related wiring harness or speaker unit.
(See FRONT 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
•  Remove the suspect speaker.
•  Disconnect the speaker connector (2-pin) and inspect the resistance of speaker.
•  Is the resistance normal?
Specification:
Speaker resistance + wiring resistance
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 SPEAKER REMOVAL/INSTALLATION.)
(See CENTER SPEAKER REMOVAL/INSTALLATION.)