Audio - Sound System Inop/High-Pitch Noise/DTC 00463
91 BOSE Sound System Inoperative, Possible High-pitched Noise (DTC 00463)91 09 16
2013107/7
March 25, 2009
Supersedes Technical Service Bulletin Group 91 number 09-01 dated January 8, 2009 for reasons listed below.
Vehicle Information
Condition
- A BOSE Sound System-equipped A6 produces noise or no sound in CD and Radio mode.
- The Gateway control module may store DTC 00463/004 for no communication with the BOSE Amplifier J525.
Technical Background
The BOSE amplifier may be stuck in MUTE with the MUTE symbol displayed on the MMI screen. White noise or a high-pitched noise may be another indication of this issue.
The condition can usually be reversed via power supply reset to the amplifier. Only BOSE amplifiers with software version 0140 are affected.
A ring break diagnosis may not identify the amplifier J525 as defective. The VAS Tester may not be able to communicate with the BOSE Amplifier while in this condition.
Production Solution
Improved software.
Service
1. Verify whether the issue is present in all Audio modes.
2. Turn off terminal 15 / ignition.
NOTE:
Terminal 15 / ignition must be turned off before disconnecting the amplifier connector.
3. Reset the BOSE amplifier by disconnecting and then reconnecting the BOSE amplifier connector.
4. If the sound returns or the noise disappears and Software Version 0140 is verified in the BOSE Amplifier J525 (Address word 47), an MMI System Update has to be performed.
Refer to Technical Service Bulletin 2019334 for directions to perform the update.
Warranty
All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual. Claims are subject to review or audit by Audi Warranty.
Additional Information
The following Technical Service Bulletin(s) will be necessary to complete this procedure:
- TSB 2019334, 91 MMI High System software update (Zug 864 - update) procedure
All part and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.