08-050-15 REV-A

Flash: Poor Audio Sound Quality This bulletin involves updating the Amplifier (AMP) software. The customer may describe one or more of the following symptoms/conditions: ? Speakers not loud enough. ? Speakers Buzz/Rattle. ? Poor Sound Quality from Speakers. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs): ? B1474-13-Channel 5 Audio Speaker Output - Circuit Open ? B1479-13-Channel 6 Audio Speaker Output - Circuit Open