DSC
 

Can anyone explain to me how exactly the DSC actually works?

It's because I have a crazy idea that if my DSC were somehow either slightly delayed or working backwards:dunno: it could be causing my ass-end to get squirrelly.

Thoughts? Magical fixes? WAG? SWAG?

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It works by controlling the torque and slippage to all four wheels from information that it gathers from various sensors. If it's not working properly then I would think you should be getting a warning and/or code unless maybe there is something wrong with a sensor that is reporting reasonable information that isn't accurate, like maybe the yaw sensor (not sure about what it's called.) Just spit ball' in though, mine works fine and I don't have any experience with DSC systems.

Pretty much what I thought, now I'm starting to think it's my DSC that is bad but not throwing codes because my ass-end is loosey goosey and no matter how much I try to convince myself that I have 50,000 hp and 25,000 lbs of torque it has to be something else and it's only momentary before it all tightens up.

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And DSC light works but never comes on? What are you using to check codes?

NOPE no lights and I use a Foxwell Nt-510 and also keep my Torque Pro on the rest of the time.

Somehow this seems like it's going to be a PiTA

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You need to get some BMW specific software running on a laptop to read the codes. Yes, might take some effort to track down such a problem. It could even be a transfer case issue but you need to be sure you are getting all the information first.

Has there been any work done on transfer case ??

IIRC, when the DSC is off (as in normal daily driving) and you lose enough grip to activate it, the DSC light will flash in conjunction with the activation. So if I gun it taking off from an icy stop sign, DSC will detect wheelspin, will slow down said wheels (feels very similar to a timing retard) to a speed where they can grip, and will transfer grip to other wheels with positive grip. The DSC light is going nuts during this process. It's not a blinker like flash IIRC. I believe it flashes directly in conjunction with whatever feedback signal it is getting from the wheels....so it's very fast and irregular while grip is intermittent or non-existent. Does that sound correct? We got a little snow today for the first time and I'd planned to take it out for it's annual test!

Only the resistor and motor but this issue predates that work

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I'll see about getting video from inside looking rearward. It's crazy noticeable when driving over the little white road markers like when they're used to put turn arrows in the lane.

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