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STEP
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INSPECTION
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ACTION
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1
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• Are there a broken sound or poor sound quality from all speakers?
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Yes
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Go to the next step.
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No
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Go to the Step 5.
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2
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• Inspect the sound while adjusting the sound volume.
• Is there a broken sound or poor sound quality between "15" and "20"?
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Yes
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Go to the next step.
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No
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The system is normal.
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3
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• Inspect the BASS/TREE.
• Is there a poor sound quality at "+3--3" of "BASS/TREB"?
-
Note
• When press the AUDIO CONT button for a few seconds, BASS/TREB is set at "0".
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Yes
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Go to the next step.
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No
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If there is a broken sound at "+6--6" of BASS/TREB with the maximum volume, the system is normal.
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4
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• Attempt to duplicate the symptom on the other vehicle.
• Is the sound better than the customer's vehicle?
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Yes
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Replace the BOSE amplifier unit.
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No
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The system is normal.
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5
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• Identify the speaker with a broken sound by adjusting BAL/FADE.
• Is the suspect speaker installed upward?
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Yes
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Go to the Step 7.
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No
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Go to the next step.
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6
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• Inspect the speaker installation condition.
• Is the speaker installed properly?
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Yes
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Go to the next step.
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No
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Install the speaker properly.
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7
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• Remove the speaker.
• Is there any foreign material or damage on the speaker?
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Yes
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Repair or replace the suspect speaker.
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No
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Go to the next step.
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8
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• Inspect the sound again.
• Is there broken sound?
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Yes
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Go to the next step.
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No
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Inspect the vibration from the door trim and/or package trim. Repair or replace the suspect trim as necessary.
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9
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• Replace with the speaker known to be good. (e.g., swap right and left speaker.)
• Does the broken sound appear at the same location?
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Yes
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Replace the BOSE amplifier unit.
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No
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Replace the speaker.
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