Fxx-/Ixx-/Gxx-series Anyone worked with DME exhaust flapper control "Konfiguration abgasklappensteuerung"? - Bimmerfest - BMW Forums



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  #1  
Old 10-29-2017, 04:30 PM
TLKM3 TLKM3 is offline
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Mein Auto: F10 M5 CP, 550i, E60 545i
Anyone worked with DME exhaust flapper control "Konfiguration abgasklappensteuerung"?

I've searched around and not found much about this. On my 2014 F10 M5, the wiring diagrams clearly show that the exhaust flapper control that controls vacuum to the two exhaust butterfly flappers receive their commands from the DME (no special ECU for this function).

So I quick check through CAFD_00000B0A_000_095_001 and I find:
3320 BSU-Config, 2D -> Konfiguration Abgasklappensteuerung

which is set to Werte=25 on my 2014 M5 Competition Package.

I was hoping for something more obviously controllable but I guess not. Has anyone ever investigated this? Do other cars with these valves have different values? Does the non-CP M5 have a different value?
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Old 10-30-2017, 06:40 AM
aboulfad aboulfad is offline
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Its funny i noticed that one as I was looking at some other parameters in DME. It is also 25 for my F82 M4. It is possible to find out values for other car types but not knowing what it does wouldn't help much.
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Old 10-30-2017, 08:54 AM
TLKM3 TLKM3 is offline
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Agreed, but it is interesting. There are a variety of products out on the marketplace that allow some control of the exhaust butterflies, some including the F10 M5, some not. Some of these products are the "plug into the OBDII socket" type and also offer a set menu of pretty common feature coding. Others are the key fob type wireless or hard wired remote control, which is probably just a remote "fuse puller" like the "exhaust commander" I had on my C6 Corvette.

The smartphone app one (I'll have to go back and get names if people are interested in this thread) offers on-the-fly open/close/OEM setting via the app while driving, so how is that accomplished? Realtime coding? Coding with ESYS isn't that quick, with all the steps it does when you select "Code FDL".
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Old 10-30-2017, 09:28 AM
aboulfad aboulfad is offline
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The products that plug a unit on the exhaust is merely a remote mechanical control. Those that plug into the diagnosis OBD socket, may use a diagnostic msg to enable/disable the flaps.
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  #5  
Old 11-01-2017, 09:49 PM
packetpilot packetpilot is offline
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Yep, @aboulfad's spot-on like always. (long time, good sir!)

@tlkm3: you can see exactly what messages are being sent by OBDII-based units in this video:
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on IG @packetpilot | coding repo/wiki in progress -- contributors wanted!
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Old 11-02-2017, 03:15 AM
aboulfad aboulfad is offline
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Quote:
Originally Posted by packetpilot View Post
Yep, @aboulfad's spot-on like always. (long time, good sir!)
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Old 09-11-2019, 03:04 AM
Shakall Shakall is offline
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Is it possible to code the Exhaust so that they are allways opened ? I have a 328i with normal Exhaust and fold control.
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