Attachment Bulletin # 910303
Group: 91Number: 03-03
Date: Sept. 30, 2003
Subject:
Symphony II Or Concert II Radio, Inoperative After Replacement
Model(s):
A4, A6, A8 With Symphony II Radio 2001 --> 2003
TT With Concert II Radio 2002 --> 2003
Condition
After radio replacement, Instrument Panel cluster replacement, radio removal and installation, or after battery disconnect, the Symphony II or Concert II radio may be inoperative or be in "Safe Mode".
Service
Due to software changes in the Symphony II and Concert II radios, it is required that the radio code be entered correctly to ensure instrument cluster recognition.
When servicing, perform the following to ensure that the instrument cluster properly recognizes the radio coding:
- Remove radio fuse (see AESIS for Wiring Diagram for your particular model.
- Reinstall fuse, switch ignition ON, switch radio ON.
^ Radio now indicates SAFE.
- Input radio code.
- Switch ignition OFF, wait 30 seconds and remove radio fuse once again.
- Reinstall fuse and switch ignition ON.
^ Radio is now functional.