Flash: Poor Speaker Sound Performance
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
