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  #21  
Old 15th July 2017, 10:41 AM
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tc4332 tc4332 is offline
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Hi Julian,
As ever some good info. Thanks.
My BEM is 160 so I guess the best is to leave it alone.
Unless you recommend a newer replacement.


Address 61: Battery Regul. Labels: 4E0-910-181.lbl
Part No SW: 4E0 910 181 HW: 4E0 915 181
Component: ENERGIEMANAGER H02 0160
Revision: 00000000 Serial number: 00000000010676
Shop #: WSC 00000 000 00000
VCID: 5DB1B54184D4E3C924D-8008

Subsystem 1 - Part No: 000 915 105 AK
Component: von VA0 301008803E
Coding: 303030393135313035414B56413033303130303838303345
Shop #: WSC 73430 210 01865

No fault code found.
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  #22  
Old 15th July 2017, 02:16 PM
JulianHicks JulianHicks is offline
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Quote:
Originally Posted by tc4332 View Post
My BEM is 160 so I guess the best is to leave it alone.
Unless you recommend a newer replacement.
Hi Ray; as you're aware, it's difficult to find out anything about any ECUs as Audi seem to be reluctant to publish information.

I wasn't aware that the logging was different until Ross Tech and I looked at different ECU levels and we saw the logs were much 'better' in the later ECUs.

The Audi bulletin doesn't really say what was wrong with the firmware versions that were bad but unless you're interested in fuller logs [and if your car works - who cares? ] then I stick with what you've got.

Just bear in mind the info. if you ever need to replace the BEM ECU. [In my mind the ECUs with flawed levels have no 'Ebay value'].

Regards - Julian

Some technical info. in attached text file
Attached Files
File Type: txt A8 Battery ECU info.txt (1.9 KB, 235 views)
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  #23  
Old 15th July 2017, 07:32 PM
davekes davekes is offline
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Julian

Thanks for some great information. If I fit a new battery whilst on this model of battery management software, do you think it'll drag the battery down?

I don't have the battery charge monitor on my MMI so the 10% display issue isn't a problem, however the technical note suggests that the module itself will discharge the battery.
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  #24  
Old 16th July 2017, 10:19 AM
JulianHicks JulianHicks is offline
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Quote:
Originally Posted by davekes View Post
Thanks for some great information. If I fit a new battery whilst on this model of battery management software, do you think it'll drag the battery down?
Sorry, can't say as it's not clear what causes the issues on those software levels. However, since Audi issued a Technical Note about it and arranged for new software to be put in, it's probably worth getting yours 'fixed'.

Quote:
Originally Posted by davekes View Post
Julian
I don't have the battery charge monitor on my MMI ...
You can fix this with VCDS as it's a setting that's been changed to remove it from the MMI. Most of us think it doesn't add much value but it's easy to turn back on as follows:
Select Control Module "07-Control Head".
Click on "Adaptation - 10".
In the "Channel" box enter 02 and click 'Read'.
In the "New value" box type in sum of the current value + 32.
Click "Test"
Click "Save", then "Done, Go Back" "Close Controller - Go Back - 06"
Exit VCDS
Reboot MMI


BTW, FYI, these are the setting values for Adaptation Channel 2
+00001 = Left-Hand-Steering (LHD) [Standard]
+00002 = Vehicle Identification Number (VIN) available
+00008 = Oil Level Display available
+00016 = Digital Radio (DAB) Video Transmission
+00032 = Battery Status Display active
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Last edited by JulianHicks; 16th July 2017 at 10:31 AM. Reason: Add info about channels ...
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  #25  
Old 17th July 2017, 07:49 AM
davekes davekes is offline
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Thanks Julian.

I will have a look at those with VCDS later this week.
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  #26  
Old 19th July 2017, 08:25 PM
davekes davekes is offline
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Update for you all Gents.

I have installed a replacement amplifier (no CP removal required).
Installed and coded a new battery.
Cleared all the VCDS codes and performed a re-scan.

The new battery seems to have helped remove a number of faults. See attached file which shows what I'm left with.

Navigation system:control module defective. The system is working fine so I assume this is a blip.

Aux heater unit locked: I don't think that I have this fitted on my car.

Level control cannot be reached, is this the air suspension ? It's working fine.

I've got a second hand tail light on order, will plan to fit that next week.

Then I need to have my local Indy fit a new washer bottle.

Once I've sorted the above issues it'll be time for a good clean and enjoy the car for a while.

If anyone can offer any recommendations based on the remaining fault codes I have, this would be well received.

On a side note, since replacing the battery I've noticed that the keyless entry system is working very well.

Thanks for your help and support this far.

All the best
Dave
Attached Files
File Type: txt 190717 remaining faults.txt (5.6 KB, 217 views)
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  #27  
Old 19th July 2017, 08:29 PM
davekes davekes is offline
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Quote:
Originally Posted by JulianHicks View Post
Battery History info is sorely lacking but there are two useful aids:

1) VCDS supply a [to be honest, poorly implemented] tool to look at and analyse logs as part of VCDS. Tool name is VCDSSCAN and it's in the VCDS folder.
2) The Audi SelfStudyProgram SSP364 for the Q7 describes the logs in detail as the revised Battery Manager was implemented in the Q7 and then the A8. Look for the PDF online - pages 17-22 describe the logs that the Battery Manager ECU stores.

Note: I see from your VCDS scans you have a 'bad' level of Battery Manager firmware.
Component: ENERGIEMANAGER H12 0480

There's some sort of 'bug' in firmware versions between 270 and 490 as described in the attached Audi bulletin.

[I had a bad one and it was flashed by the dealer four years ago; nowadays that flash is so old it may be better to buy an ebay BEM ECU at the right level [510+] second hand.]

Julian

PS For extra info. I include the following that I found out doing research on the BEM. [I did the A8 beta testing for Ross Tech BEM history code and I swapped my BEMs around for them to see the log differences].

There are three 'versions' of the A8 BEM:

1) FW levels up to 240. This is a simple BEM with minimal [pre Q7] logs. See attached sample log.
2) FW levels 340 to 480. These are the updated 'full log - as per Q7 info.' ECUs but are flawed as per technical note attached.
3) FW 510 to 550. These are the updated 'full log' ECUs that work properly.
Julian,

I have made some enquiries with some second hand part dealers that are selling battery ECU's but they are unable to tell me what the software version is. In fact it is very obvious that they don't have the same depth of knowledge on the subject as yourself. I'll keep my eye on the small ads but for the time being I will likely have to live with the version I have.

Dave
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  #28  
Old 19th July 2017, 11:51 PM
JulianHicks JulianHicks is offline
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Quote:
Originally Posted by davekes View Post
Julian,
I have made some enquiries with some second hand part dealers that are selling battery ECU's but they are unable to tell me what the software version is.
Dave
Dave; it's a sad fact that very few people understand Audi part numbers

But it's easy ; the software level of the ECU is printed on the Audi label. Most electronic parts were never designed to be updated with new software so the label indicates the level. [The exception is all the Media related ECUs - Amps, Tuners, NavBox etc; the number on these labels is the original version which may well have been updated by subsequent MMI updates].

On the A8 BEMs, the software level is at the far right of the line starting SW; see attached examples of two Ebay samples.

Julian
Attached Thumbnails
Click image for larger version

Name:	BEM 0240.jpg
Views:	216
Size:	44.0 KB
ID:	16567   Click image for larger version

Name:	BEM 0550.jpg
Views:	192
Size:	39.8 KB
ID:	16568  
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  #29  
Old 20th July 2017, 12:03 AM
JulianHicks JulianHicks is offline
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Quote:
Originally Posted by davekes View Post
Navigation system:control module defective. The system is working fine so I assume this is a blip.

Aux heater unit locked: I don't think that I have this fitted on my car.

Dave
I note you must have a very old Navigation DVD - 2005 maybe? The firmware is at 0550 from the VCDS scan [right end of Component line]; it went through various updates [and they're all done by the Nav DVD rather than a MMI update CD]. The final level was 1060 and was on the 2009 and all subsequent maps. You might like to try and find a cheap 2009 on DVD from somewhere.

And you will have an Aux Heat unit as you have a 3.0 TDI; when they fail a few times they get locked. My 3.0TDIs locked too but it's not too crucial as it's for very cold weather. In my case, we don't get much of that in Kent.

Oh, and BTW, I think I saw you had a slight out-of-date MMI too from your Control Head output. The latest/last version for the 2G A8 was 5570 and I think you're on 5150.

Julian
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