Audio System - Vehicle Battery Drain
91 08 1472014127/3
November 24, 2008.
Supersedes Technical Service Bulletin Group 91 number 08-20 dated June 4, 2008 for reasons listed below.
Affected Vehicles
27 Battery dead or low after returning to the vehicle
Condition
The vehicle battery is or is almost discharged and the Energy Management Control Module J644 indicates an increased static current in order of 700 mA.
Technical Background
Due to a software issue, the Radio R might not enter sleep mode if the ignition is turned off and the radio power remains on.
Production Solution
Software improvement in Model Year 2007.
Service
Evaluate the vehicle battery historical data stored in the Energy Management Control Module J644.
Then go to 61 - Battery control in Guided Functions and select the menu shown above.
Notes can be found in the entries for Static current history shown.
EXAMPLE FOR A VALID CASE:
An increased quiescent current was measured over a total period of 203 hours as shown in the table above.
MMI System Update procedure
1. Connect a recommended battery charger to the designated charging posts in the vehicle.
Tip:
To avoid false readings of the battery manager, don't charge the battery directly at its posts.
2. Eject possible inserted CDs from the CD changer in the glove compartment and load Update CD 4F0 906 961 AB in position 1.
3. All sound settings will be set to default after the update. Depending on the installed MMI components, further settings (Previous/Memory station list, stored CD name, directory entries and voice recognition name tags) may be lost.
Tip:
Write down all settings to restore them after the update. Inform customers that they have to rerecord their name tags.
4. Press and hold the MMI Control Head buttons: Setup and Return simultaneously until the following screen appears:
5. Press the lower right soft key of the MMI Control Head to enter the SWUpdate menu.
6. Use the central control knob of the MMI Control Head to select CD-ROM and then Standard.
7. The screen below, which may take a few seconds to appear, shows the current software status of the MMI component in comparison to the inserted Update CD.
8. Scroll down the component list with the central control knob and select Start download.
9. Note and obey the displayed message to avoid component breakdowns. Scroll down the screen to accept the following update with OK.
10. The MMI component update lasts between 15 and 60 minutes, depending on the installed components.
11. After initialization of the updated components, the following screen (or a similar one) appears.
Tip:
The displayed status Not OK and - is update related and not a fault. Please ignore and proceed.
If you scroll down the component list, you may discover that not all necessary component updates were performed in the first step (not all OK). In this case, select Try again to perform the missing component update.
If all necessary components are updated (0 NOK) select Restart MMI to reset the MMI system.
12. Eject Update CD 4F0 906 961 AB and reinsert removed CDs, if applicable.
13. Connect the VAS Tester to the vehicle and erase all sporadic fault codes.
14. Select 07 - Display/control unit and add 32 to the adaptation value of adaptation channel 2. The battery charge status will then be displayed again.
15. Perform the required SVM Update using action code:
- NA4FK730 for the A6.
- NA4EK730 for the A8.
- NA4LK730 for the Audi Q7.
For further SVM update instructions and troubleshooting, please refer to the SVM Operating Manual; ElsaWeb TSB 2011732.
Warranty
When procedure applies to vehicles under warranty, use the table.
Required Parts and Tools
Additional Information
All part and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Dept. and service manuals for the latest information.