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

id0903e2803200

Vehicles Without Bose®

3

No sound from all speakers

Possible DTC

09:Er20, 09:Er21, 10:Er07, 22:Er07
POSSIBLE CAUSE
•  Short circuit in wiring harness between audio unit and speaker
•  Short circuit inside speaker
•  Audio unit malfunction
•  Speaker malfunction (e.g., foreign material penetration, damage)

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Press the AUDIO CONT/TUNE switch for 2 s or more.
•  Play the CD or radio.
•  Adjust the volume between “10” and “15”.
•  Is there any sound?
Yes
The system is normal.
No
Go to the next step.
2
•  Turn the ignition switch to the LOCK position.
•  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 door speakers
―  Terminal 1A (LH+) — GND
―  Terminal 1C (LH-) — GND
―  Terminal 1D (RH+) — GND
―  Terminal 1F (RH-) — GND
For rear speakers
―  Terminal 1X (LH+) — GND
―  Terminal 1V (LH-) — GND
―  Terminal 1U (RH+) — GND
―  Terminal 1S (RH-) — GND
•  Is there continuity?
Yes
Repair or replace the related wiring harnesses or the speaker.
Note
•  If there is a short circuit between the speaker wiring harnesses or the speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.
No
Replace the audio unit.
(See CENTER PANEL UNIT REMOVAL/INSTALLATION.)
(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)

Vehicles With Bose®

3

No sound from all the speakers

Possible DTC

09:Er20, 09:Er21, 10:Er07, 22:Er07
POSSIBLE CAUSE
•  Speaker malfunction (e.g., foreign material penetration, damage)
•  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
•  Short circuit inside speaker
•  Audio amplifier malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Press the AUDIO CONT/TUNE switch for 2 s or more.
•  Play the CD or radio.
•  Adjust the volume between “10” and “15”.
•  Is there any sound?
Yes
The system is normal.
No
Go to the next step.
2
•  Measure the voltage at audio amplifier terminal 1A (8-pin). (vehicle wiring harness-side)
•  Is the voltage B+?
Yes
Go to the step 4.
No
Repair or replace the wiring harness between the audio amplifier and fuse. Go to the next step.
3
•  Is there any sound?
Yes
The system is normal.
No
Go to the next step.
4
•  Turn the ignition switch to the LOCK position.
•  Disconnect the audio amplifier connector (8-pin, 16-pin) and the speaker connector.
•  Inspect the continuity between the following terminals of the audio amplifier connector and the speaker connector:
For door speaker
―  Terminal 1H (LH+)— Terminal B
―  Terminal 1G (LH-)— Terminal A
―  Terminal 1D (RH+)— Terminal B
―  Terminal 1C (RH-)— Terminal A
For door upper speaker
―  Terminal 2D (LH+)— Terminal B
―  Terminal 2B (LH-)— Terminal A
―  Terminal 2M (RH+)— Terminal B
―  Terminal 2O (RH-)— Terminal A
For rear speakers
―  Terminal 2E (+)— Terminal B
―  Terminal 2G (-)— Terminal A
For center speakers
―  Terminal 2I (+)— Terminal B
―  Terminal 2K (-)— Terminal A
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the related wiring harnesses.
5
•  Turn the ignition switch to the LOCK position.
•  Disconnect the audio amplifier connector (8-pin, 16-pin).
•  Inspect the continuity between the audio amplifier connector and ground:
For door speakers
―  Terminal 1H (LH+) — GND
―  Terminal 1G (LH-) — GND
―  Terminal 1D (RH+) — GND
―  Terminal 1C (RH-) — GND
For door upper speakers
―  Terminal 2D (LH+) — GND
―  Terminal 2B (LH-) — GND
―  Terminal 2M (RH+) — GND
―  Terminal 2O (RH-) — GND
For rear speakers
―  Terminal 2E (+) — GND
―  Terminal 2G (-) — GND
For center speaker
―  Terminal 2I (+) — GND
―  Terminal 2K (-) — GND
•  Is there continuity?
Yes
Repair or replace the related wiring harnesses or the speaker.
Note
•  If there is a short circuit between the speaker wiring harnesses or the speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.
No
Go to the next step.
6
•  Turn the ignition switch to the LOCK position.
•  Disconnect the audio amplifier connector (16-pin) and audio unit connector (24-pin).
•  Inspect the continuity between audio amplifier terminal 3A (vehicle wiring harness-side) and the audio unit terminal 1J (vehicle wiring 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 the audio unit. 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.)