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Old 01-07-2010, 03:48 PM   #1
thefrog1394
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What does holding down ASC button for 10 seconds do?

Normal operation of ASC button is press once asc off press again asc back on. I know disabling ASC disables traction control, but am not sure if it disables the "fake LSD" behavior (anyone know?).

Holding down the ASC button for 10 seconds has a different behavior. Instead ASC is disabled until the car is turned off and then back on. Apparently on some BMW's this disables traction control but leaves the "fake LSD" behavior active. Is this true on e46's?

NOTE: I know with the DSC button there are two different levels of "off", this is NOT what I am talking about, I am talking about with ASC, which common knowledge seems to be that it is either off or on.
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Old 01-07-2010, 03:50 PM   #2
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I believe that rule only applies to "DSC" which you will find in the newer E46's. "ASC" found in 323's and 328's is simply an "on" or "off" button.

I tried just for kicks when I had my 328 and I could never get it to do anything different.
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Old 01-07-2010, 03:52 PM   #3
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My DSC button has only the single stage on/off. It was something that was changed mid-MY. I don't think holding your ASC button for any length of time will trigger anything else other than turning your traction control off.
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Old 01-07-2010, 04:03 PM   #4
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Except holding it for 10 seconds does do something differently, it makes it so you can no-longer re-enable it without turning the car off and then back on (try it and see... hold it down for like 15 seconds and you will no longer be able to re-enable. Maybe that is the extent of the difference though?

EDIT: could it possibly be this?

http://m3forum.net/m3forum/showthread.php?t=257171

(although unlike the article indicates, the ASC light stays illuminated)

Quote:
If you have trouble in deep snow or slush with ASC, hold it down for 10 seconds and it will show the light as being permanently on regardless of if you press the button. What that will do is only apply the braking portion of the ASC, and not limit the engine to bog it down. Works well in slush as usually ASC bogs down the engine so much you can't go anywhere.
- from some e36 m3 forum post I found on google...

My guess is that is in fact what this feature does, keep the braking portion (i.e. fake LSD) of traction control but get rid of the throttle-limiting features.
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Old 01-07-2010, 04:43 PM   #5
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Older systems are just one-press on/off. Newer ones were 2 stage depending on if you pressed quickly or pressed and held for ~5 seconds. If you hold it for 10 seconds the system thinks that you left your purse on the console and ignores the button until you turn the car off and back on.
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Old 01-07-2010, 05:00 PM   #6
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its engages the turbo drive nahh it disengages stability and traction control on some models...on the early e46 the traction control light will stay on and the only way you can turn it off is by turning the car off then on...
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Old 01-07-2010, 07:40 PM   #7
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Quote:
Originally Posted by Tangent_ View Post
Older systems are just one-press on/off. Newer ones were 2 stage depending on if you pressed quickly or pressed and held for ~5 seconds. If you hold it for 10 seconds the system thinks that you left your purse on the console and ignores the button until you turn the car off and back on.
I confirmed the purse theory, I tried holding it down for 10 seconds starting with ASC off and sure enough it turned it on and disabled the button.

I still am trying to figure out whether ASC disabled disables the "fake LSD" behavior, I believed called ABD? Automatic Brake Distribution?
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Old 01-07-2010, 11:16 PM   #8
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Only one way to find out. Go to an empty parking lot. Turn asc off and try drifting/powersliding/burnouts and the hid the button 10 seconds and repeat. You will immediately find out if it does anything since your tires will either slide or grip.
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Old 01-07-2010, 11:39 PM   #9
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Quote:
Originally Posted by ///M=Power View Post
its engages the turbo drive nahh it disengages stability and traction control on some models...on the early e46 the traction control light will stay on and the only way you can turn it off is by turning the car off then on...
Well Im not sure how old is early but my 02, if i hit the button for 5 secs, the dsc light turns on and so does the e-brake light turn on....and I can simply turn it back on by hitting the button again. But wait, so when I hit the thing one time, im actually turning it off? And I thought hitting it once probably lets the driver and the car know that its active. maaan
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Old 01-07-2010, 11:43 PM   #10
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Quote:
Originally Posted by thefrog1394 View Post
Except holding it for 10 seconds does do something differently, it makes it so you can no-longer re-enable it without turning the car off and then back on (try it and see... hold it down for like 15 seconds and you will no longer be able to re-enable. Maybe that is the extent of the difference though?

EDIT: could it possibly be this?

http://m3forum.net/m3forum/showthread.php?t=257171

(although unlike the article indicates, the ASC light stays illuminated)

- from some e36 m3 forum post I found on google...

My guess is that is in fact what this feature does, keep the braking portion (i.e. fake LSD) of traction control but get rid of the throttle-limiting features.
I think that's about right, I always wondered what the difference was when I held the button but now that i think about it that actually makes sense.
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Old 01-08-2010, 10:54 AM   #11
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Press and release = you might crash.
Press and hold = you will crash.
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Old 01-08-2010, 03:37 PM   #12
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Originally Posted by nathancarter View Post
press and release = you might crash.
Press and hold = you will crash.
win
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Old 01-08-2010, 03:40 PM   #13
thefrog1394
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Quote:
Originally Posted by nathancarter View Post
Press and release = fun.
Press and hold = more fun.
Fixed that for ya
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