NO.3 NO SOUND FROM ALL SPEAKERS

id0903a1803200

3

No sound at all/00:Er10, 03:Er07, 03:Er10, 06:Er07, 06:Er10, 09:Er20, 09:Er21, 10:Er10, 11:Er10, 22:Er07, 22:Er10

TROUBLESHOOTING HINTS

• Speaker malfunction (e.g., any foreign material. broken).
• BOSE amplifier unit malfunction.
• Short circuit in wiring harness between BOSE amplifier unit and speaker.
• Short circuit inside speaker.
• Open circuit in wiring harness between BOSE amplifier unit and speaker.
• Open or short circuit in wiring harness between BOSE amplifier unit and audio unit.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
• Press AUDIO CONT button more than 1 second.
• Play the CD or Radio.
• Adjust the volume between "10" to "15".
• Is there the sound?
Yes
The system is normal.
No
Go to the next step.
2
• Turn the ignition switch to the LOCK position.
• Remove the BOSE amplifier unit.
• Disconnect the BOSE amplifier connector (26-pin).
• Inspect the continuity between the BOSE amplifier unit wiring harness-side connector terminal and ground:
For front speaker
- Terminal B (L+) - GND
- Terminal D (L-) - GND
- Terminal W (R+) - GND
- Terminal B (R-) - GND
For rear speaker
- Terminal C (L+) - GND
- Terminal A (L-) - GND
- Terminal X (R+) - GND
- Terminal Z (R-) - GND
- Is there a 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 BOSE amplifier unit operates to cut the sound.

No
Go to the next step.
3
• Turn the ignition switch to the LOCK position.
• Disconnect the BOSE amplifier unit connector (26-pin).
• Inspect the voltage at the audio unit wiring harness-side connector (26-pin) terminal U (B+).
• Is the voltage B+?
Yes
Go to the Step 5.
No
Repair or replace wiring harness between the BOSE amplifier unit and fuse. Go to the next step.
4
• Is there any sound?
Yes
The system is normal.
No
Go to the next step.
5
• Turn the ignition switch to the LOCK position.
• Disconnect the BOSE amplifier unit connector (26-pin) and audio unit connector (24-pin).
• Inspect the continuity between the BOSE amplifier unit wiring harness-side connector terminal Q (AMP CONT) and the audio unit wiring harness side connector terminal J.
• Is there the continuity?
Yes
Replace the BOSE amplifier unit.
No
Repair or replace wiring harness between the BOSE amplifier unit and the audio unit. Go to the next step.
6
• Is there any sound?
Yes
The system is normal.
No
Go to the next step.
7
• Remove the speaker.
• Disconnect the speaker connector (2-pin).
• Inspect the continuity between the speaker wiring harness-side connector (2-pin) terminal and ground:
For rear speaker
- Terminal A - GND
- Terminal B - GND
• Is there the continuity?
Yes
Replace the speaker.
No
Replace the BOSE amplifier unit.