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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Steptronic Reset? Real or Myth??



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      05-20-2008, 12:39 PM   #23
smithrh
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For those of you reading this thread due to "sticky brakes:" When slowing down and going slow approaching a stop, lift up on the handbrake until the red light on the dash goes off.

Reverse the procedure for when you're getting going.

Why this works, I haven't a clue.
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      05-20-2008, 12:41 PM   #24
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Quote:
Originally Posted by Blizz View Post
when you have your car in electronics mode, and you press on the gas pedal for 30 seconds... does this reallllly reset the transmission?? or is this just an unproven myth?? sounds like this could be some placebo effect... has anyone ever had a dealership actually tell them this works??

are you just better off unplugging your battery for a bit?
wasn't this how E.T. phoned home?
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      05-20-2008, 01:50 PM   #25
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the trans does store information but not for that long and it's always updated...so people complaining of poor transmission performance (lasting days or weeks etc) suddenly being corrected after this "reset" are probably just feeling placebo... or some other parameter changed that had nothing to do with the reset.

note: It's still a computer though, so there's always the chance that something gets messed up and "freezes" in one configuration which can be fixed by a reset (just like your PC)...but I'd guess this is exceedingly rare (given the fixed nature of the trans software...it's not as though it can pick up a virus) and probably doesn't explain most people's trans problems.
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      05-20-2008, 11:58 PM   #26
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OK, I drove my car some more today and all I have to say is I felt no difference at all. So unless I did something wrong doing the reset I call BS on this with an e92.
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      05-21-2008, 01:04 AM   #27
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Quote:
Originally Posted by StarrDlux View Post
Does nobody have interest in this geeky stuff for bmw? or maybe i'm in the wrong forum.
When you find that forum please PM me the link

And about that sniffer:
1. Are you ready to risk them finding it?
2. Since you do not know _what_ they did you'll end up with a lot of data but nothing to compare/crossreference against.
IMHO you'd need to active sniff in order to gain any useful knowledge. i.e. access to the true tester, someone who really knows how to operate it and the car itself, time and guts (or someone else's car ).

P.S. Sorry for OT.
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      05-21-2008, 01:18 AM   #28
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I thought you hold down the gas pedal while the car is ON for 30 seconds...
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      05-21-2008, 01:23 AM   #29
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Quote:
Originally Posted by Blizz View Post
when you have your car in electronics mode, and you press on the gas pedal for 30 seconds... does this reallllly reset the transmission?? or is this just an unproven myth?? sounds like this could be some placebo effect... has anyone ever had a dealership actually tell them this works??

are you just better off unplugging your battery for a bit?
i think that turns ur electric water pump on
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      05-21-2008, 05:10 AM   #30
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Quote:
Originally Posted by MX20 View Post
When you find that forum please PM me the link

And about that sniffer:
1. Are you ready to risk them finding it?
2. Since you do not know _what_ they did you'll end up with a lot of data but nothing to compare/crossreference against.
IMHO you'd need to active sniff in order to gain any useful knowledge. i.e. access to the true tester, someone who really knows how to operate it and the car itself, time and guts (or someone else's car ).

P.S. Sorry for OT.

yes that is why you have buddies who have access to the machine. you sniff the obd-port with basically an o-scope.

then you have him do sequences like login
change codes
update firmware
etc.

This is how VAG-COM cloned the VAG-1552. Probably at some podunk dealer who had a smart kid that would take few grand to go through the machine.

If dinan can obd-2 flash i bet they know how to do the rest.

And thanks to the world of warez vag-com has been keygen'd for so long its not funny. $8 lol.

Then again GM cable owners can just go in and edit their maps and delete codes (emissions) and other things using their $400 cable.

it's supply and demand. in the VW world people are colluding (sp?) to keep this technology from the owners. In the GM world fierce competition has forced this to the public at cheap rates.


In the BMW world dinan and others monopolize and do not offer such tools.

I am a techy geeky girl. Computer Engineer. This stuff is easy. protocols are meant to be cracked. I will pm you when i find the real enthusiasts. They are probably in south america (english) or germany.
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      06-23-2008, 09:12 AM   #31
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It works...

Yup, this just cured 9 months of aggravation for me in 30 seconds. I bought my 328xi with 5k miles, and it had a lurchy start from day one. I learned later that if I pushed the pedal down further, faster, it would get beyond the "lurchy" bit better than if I pushed the pedal a reasonable distance.

After having done the "reset" there is now noticably smoother acceleration from first contact with the pedal all the way through pushing it down.

MY thoughts on what's going on is that there is probably a pedal travel sensor that learns if you have a heavy foot or a light one, and responds accordingly. The previous owner probably pushed down harder than I do, so for D mode, it required a heavy foot to accelerate smoothly. Now having done the reset, the pedal is far more sensitive to my lighter foot.

Therefore, not sure if this is about the transmission, or the gas pedal, but the reset definitely solved a long standing problem that a dealer software flash could not solve.
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      06-23-2008, 11:09 AM   #32
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alright, trying to reset this thing...
do I hold down the kickdown button for 25 seconds? or do I floor it just until the kickdown
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      06-23-2008, 01:34 PM   #33
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It sounds like it would be more of a TPS (Throttle Position Sensor) calibration vs a tranny reset.

At idle, it knows what 0% throttle is, and the kickdown button, it would be able to know what 100% throttle is, and then interpolate inbetween.

It would give a reason for that little detent button when you are WOT throttle though (unless that button gets wired directly to the tranny vs the ECU).

Do you MT guys have the button at the end of the petal stroke? If not, it would basically rended my ramblings above usless drool....
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      06-23-2008, 02:16 PM   #34
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Quote:
Originally Posted by Wires View Post
It sounds like it would be more of a TPS (Throttle Position Sensor) calibration vs a tranny reset.

At idle, it knows what 0% throttle is, and the kickdown button, it would be able to know what 100% throttle is, and then interpolate inbetween.

It would give a reason for that little detent button when you are WOT throttle though (unless that button gets wired directly to the tranny vs the ECU).

Do you MT guys have the button at the end of the petal stroke? If not, it would basically rended my ramblings above usless drool....
Yup, this is exactly what I think as well. This is also probably why some people see a difference, and others do not as it's about the pedal, not the tranny. And yes, the button is at the end of the stroke.
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      06-23-2008, 02:34 PM   #35
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Quote:
Originally Posted by Hanjob View Post
I thought you hold down the gas pedal while the car is ON for 30 seconds...
NO! LOL - don't floor it when the car is ON - you'll redline it and blow your motor...or atleast exceed threshold temps...

It's supposed to be in electronics mode, i.e. hit the start button w/out the car on...and hold down the pedal (past kickdown) for 25 seconds.

I thought I felt a difference in driving, i.e. it didn't granny shift at 1.5-2k RPMs...
adjusted to a bit more aggressive driving if you were aggressively driving...


As for the chick w/ all the nerdy info, you're not in the wrong forum, just the wrong section, head over to the technical section LOL
- the A2DP+bluetooth stereo unavailability sucked - I was looking forward to it, but w/e my phone has an AUX port ftw!

EDIT:

in the end I may just be spitting BS - but maybe someone will believe it? hehe

Last edited by darkphantom; 06-23-2008 at 03:14 PM.
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      06-23-2008, 02:41 PM   #36
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Quote:
Originally Posted by Acemetrical View Post
Yup, this is exactly what I think as well. This is also probably why some people see a difference, and others do not as it's about the pedal, not the tranny. And yes, the button is at the end of the stroke.
Cool.... And they say beer isn't good for you.... The idea was generated over a couple of wobbly pops one evening!

I usually dabble in the WOT springs on a frequent basis. So it probably auto adjusts itself.
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      06-24-2008, 10:35 PM   #37
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      06-24-2008, 11:08 PM   #38
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      09-03-2008, 08:33 PM   #39
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I had the "sticky brake" problem too. I would come to a stop and I would have to apply extra brake pressure just to stop and the brakes would make a noise. Then the transmission would push too hard when I lifted my foot off the brake, and the car would lunge forward. I would also get the "jerk" reaction when pushing the accelerator pedal ever so slightly.

Then, I read this thread, jumped in the car, did the procedure and now the problems are completely gone. Acceleration is much smoother, too!
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      09-07-2008, 03:24 AM   #40
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      12-20-2010, 01:59 PM   #41
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Placebo on my 2007 e92.
Reset adaptation work fine only withmbavarian technic cable
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      12-20-2010, 03:10 PM   #42
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Quote:
Originally Posted by darkphantom View Post
NO! LOL - don't floor it when the car is ON - you'll redline it and blow your motor...or atleast exceed threshold temps...

It's supposed to be in electronics mode, i.e. hit the start button w/out the car on...and hold down the pedal (past kickdown) for 25 seconds.
THIS IS NEWS TO ME! KTHXBYE
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      12-20-2010, 04:06 PM   #43
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      12-20-2010, 04:24 PM   #44
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I will add another positive for the reset. I bought mine used with 58K and after a while I felt like I was driving next to my teenage daughter in a manual; I thought for sure something was wrong. Took it in as it is still CPO, dealer said he reset the transmission so it could adjust to my driving style and it was like night and day when I got it back. Placebo effect isn't even a possibility.
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