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

id0903e2803200


Without Bose®

3

No sound from all speakers/Possible DTC: 09:Er20, 09:Er21
Troubleshooting hints
•  Audio unit malfunction (with audio system)
•  Car-navigation unit malfunction (with car-navigation system)
•  Poor connection at audio unit connector, terminal damage
•  Short circuit in wiring harness between audio unit/car-navigation unit
•  Short circuit inside speaker

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Press AUDIO CONT switch more than 2 s.
•  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/car-navigation unit.
•  Disconnect the audio unit/car-navigation 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 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
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: 09:Er20, 09:Er21
Troubleshooting hints
•  Speaker malfunction (e.g., any foreign material, broken)
•  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
•  Poor connection of audio unit/car-navigation unit or audio amplifier connector, terminal damage
•  Short circuit inside speaker

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Press AUDIO CONT button more than 2 s.
•  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
•  Inspect the connection of audio unit/car-navigation unit connector (24-pin) and audio amplifier connectors for poor connection (such as damaged/pulled-out pins, corrosion).
•  Are all pins normal?
Yes
Go to the next step.
No
If poor connection of audio unit/car-navigation unit connector:
•  Securely connect the audio unit/car-navigation unit connector.
If the audio unit/car-navigation unit or audio amplifier side connector is wrong:
•  Replace the audio unit (with audio system).
•  Replace the car-navigation unit (with car-navigation system).
•  Replace the audio amplifier.
If the wiring harness-side connector is wrong:
•  Repair or replace the pins and/or the connector.
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 A (LH+)—Terminal 1D
―  Terminal C (LH-)—Terminal 1C
―  Terminal D (RH+)—Terminal 1F
―  Terminal F (RH-)—Terminal 1E
―  Terminal S (RL+)—Terminal 1H
―  Terminal U (RL-)—Terminal 1G
―  Terminal V (RR+)—Terminal 1J
―  Terminal X (RR-)—Terminal 1I
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the repair related wiring harnesses.
6
•  Switch the ignition to off.
•  Disconnect the audio amplifier connector.
•  Inspect the continuity between the audio amplifier connector and ground:
―  Terminal A (FL+)—GND
―  Terminal C (FL-)—GND
―  Terminal D (FR+)—GND
―  Terminal F (FR-)—GND
―  Terminal S (RL+)—GND
―  Terminal U (RL-)—GND
―  Terminal V (RR+)—GND
―  Terminal X (RR-)—GND
•  Is there continuity?
Yes
Repair or replace the related wiring harness or speaker unit.
(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.)
(See BASS-BOX 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 operates to cut the sound.
No
Go to the next step.
7
•  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 (40-pin, vehicle harness-side) and audio unit/car-navigation unit terminal J (24-pin, vehicle harness- side).
•  Is there continuity?
Yes
Replace the audio amplifier.
(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness between the audio amplifier and audio unit/car-navigation unit.
Then go to the next step.
8
•  Is there any sound?
Yes
The system is normal.
No
Replace the audio amplifier.