NO.3 NO SOUND FROM ALL THE SPEAKERS [VEHICLES WITH Bose]

id0903a1857300

3

No sound from all the speakers / Possible DTC: 03:Er07, 03:Er10, 06:Er07, 06:Er10, 09:Er20, 09:Er21, 10:Er10, 22:Er07, 22:Er10

Troubleshooting hints
• Speaker malfunction (e.g., foreign material penetration, damage)
• 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.
• Short circuit inside speaker

Diagnostic procedure

STEP

INSPECTION

ACTION

1
• Press the AUDIO CONT button for 2 s or more.
• Play the 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 audio amplifier terminal A. (vehicle wiring harness-side)
• Is the voltage B+?
Yes
Go to 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, 24-pin).
• Inspect the continuity between the following terminals of the audio amplifier connector and the speaker connector:
For door speaker (LH)
- Terminal 1M, 1I - Terminal B
- Terminal 1K, 1O - Terminal A
For door speaker (RH)
- Terminal 2C, 2E - Terminal A
- Terminal 2D, 2F - Terminal B
For rear speakers
- Terminal 1U - Terminal B
- Terminal 1W - Terminal A
For center speaker
- Terminal 1Q - Terminal B
- Terminal 1S - Terminal A
- Is there continuity?
Yes
Go to the next step.
No
Repair or replace the related wiring harnesses.
4
• Turn the ignition switch to the LOCK position.
• Disconnect the audio amplifier connector (8-pin, 24-pin).
• Inspect the continuity between the audio amplifier connector and ground:
For door speakers
- Terminal 1M (24-pin, LH OUT+) - GND
- Terminal 1I (24-pin, LH OUT+) - GND
- Terminal 1K (24-pin, LH OUT-) - GND
- Terminal 1O (24-pin, LH OUT-) - GND
- Terminal 2C (8-pin, RH OUT-) - GND
- Terminal 2D (8-pin, RH OUT+) - GND
- Terminal 2F (8-pin, RH OUT+) - GND
- Terminal 2E (8-pin, RH OUT-) - GND
For rear speakers
- Terminal 1U (24-pin, OUT+) - GND
- Terminal 1W (24-pin, OUT-) - GND
For center speaker
- Terminal 1Q (24-pin, OUT+) - GND
- Terminal 1S (24-pin, OUT-) - GND
- Is there continuity?
Yes
Repair or replace the related wiring harnesses or the speaker unit.
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.
5
• Turn the ignition switch to the LOCK position.
• Disconnect the audio amplifier connector (24-pin) and audio unit connector (24-pin).
• Inspect the continuity between audio amplifier terminal 1V (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.
6
• Is there any sound?
Yes
The system is normal.
No
Replace the audio amplifier. (See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)