Campaign 91H8 - Audio Amplifier Software Update

UPDATE - B&O amplifier software update (NVLW)

91 11 19

2027799/1

October 11, 2011.





Affected Vehicles

Condition
This RVU has been proactively released to prevent the following condition from occurring in the vehicle:

^ No sound from all audio sources.

^ In the Amplifier J525 (address word 47), DTC 00003 (Control Module Faulty) may be stored.

This Required Vehicle Update (RVU) is in effect until removed.

Vehicle must meet all of the following criteria:

^ Procedure is valid only for vehicles that show the 91 H8 code in the ElsaWeb Campaign/Action Information screen on the day of repair.

^ Vehicle must be within the New Vehicle Limited Warranty.

^ Procedure must be performed within the allotted time frame stated in this Technical Service Bulletin.

Procedure must be performed on applicable vehicles in dealer inventory prior to sale.

Technical Background

In certain rare circumstances (e.g. discharged vehicle battery, engine off, radio playing at high volume and/or bass levels, very cold weather) it is possible for battery voltage at the amplifier to briefly drop below 9 Volts. When this occurs, the amplifier software temporarily switches the amplifier off. If the condition occurs 3 times, DTC 00003 is stored and the amplifier is permanently switched off.

Production Solution

Optimized amplifier software.

Service

1. Follow all instructions in the attached TSB 2011732 00 Software Version Management (SVM), operating instructions.





2. Update the amplifier J525 using the SVM action code as listed in the table above if necessary. The new software prevents the DTC from setting due to low voltage conditions.








Warranty

Additional Information

The following Technical Service Bulletin will be necessary to complete this procedure:

^ TSB 2011732 00 Software Version Management (SVM), operating instructions.

All parts and service references provided in this RVU are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.

Attachment


























^ TSB 2011732 00 Software Version Management (SVM), operating instructions.