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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.