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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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      05-19-2008, 09:15 PM   #1
Blizz
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Steptronic Reset? Real or Myth??

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?

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      05-19-2008, 09:15 PM   #2
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elaborate on "resetting the tranny"
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      05-19-2008, 09:20 PM   #3
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I was going to try this today and forgot. I thought it was for 25 seconds, not 30? I hope it works; damn sticky brake drove me nuts today...
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      05-19-2008, 10:04 PM   #4
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Originally Posted by e92leon View Post
elaborate on "resetting the tranny"
resetting the transmission.. as in when you reset whatever adapts to your driving style.. ya know? like when some people get that reprogram, and they car feels slugish at first until they car relearns their driving habbits.. i read somewhere that you could step on the pedal for 25 or so seconds and reset.. and im curious if its true, or just an unproven myth
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      05-19-2008, 10:41 PM   #5
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Hey i'd like to know about this too. . .
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      05-19-2008, 10:51 PM   #6
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http://www.e90post.com/forums/showth...=gearbox+reset
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      05-19-2008, 10:57 PM   #7
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hmm.. i read through that thread.. i also read through another one that i found earlier about this subject before i made this thread.. but still nothing definitive.. all the threads are the same. one person says they are certain its works.. then a bunch of people try it and arnt sure if it really works or if its just in their heads..

im curious if anyone has confirmed this to be a factual way to reset the transmission... anyone know for certain??
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      05-19-2008, 11:05 PM   #8
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Yeah, I know what you mean. The only real way is to just try it. It's only going to cost you a minute of your time and hours of you asking yourself "is it working?... I think it is... maybe it isn't?...sob!"
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      05-19-2008, 11:55 PM   #9
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Might be worth a try!
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      05-19-2008, 11:57 PM   #10
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i don't feel a difference
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      05-19-2008, 11:59 PM   #11
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lol. its probably to make fun of step owners from MT owners. I can imagine so many E90 Step owners just stepping on gas for 30 seconds in the car doing nothing, thinking that this will make the car shift like SMG.

lemme know if this actually "works" on some people. I want definite proof, not just ass-dyno.
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      05-20-2008, 12:14 AM   #12
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I plan on doing it first thing tomorrow and then driving myself nuts the entire day wondering if it actually made any difference. Good times!
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      05-20-2008, 12:25 AM   #13
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I will try this and drive in DS (MT)
just have fun with it
either way, placebo!
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      05-20-2008, 01:46 AM   #14
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no effect, placebo if any
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      05-20-2008, 02:19 AM   #15
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you know what, even if it doesn't work, it's a good excuse to actually drive haha
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      05-20-2008, 03:41 AM   #16
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i dont think this affects DS. i think it has more to do with the D learning when to shift when you cruise.

but it's all so seemless it's impossible to tell if it made a difference. the only advantage i see to this is for people who like to push the car all the time in D, which makes no sense since DS is better for that. if you reset and you don't push it constantly, the comp will just re-adjust to your regular style and in the end, you gained nothing. it's not like you reset, drive like crazy in D, the computer is set in stone with new adaptation. i feel like the computer is always adapting to a certain degree depending on the length of time used in each driving style.

now if someone found a way to make DS not shift at redline at WOT....

but what DOES that button at the end of the pedal do? does it tell the computer that the user really wants "WOT nownownow!"?
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      05-20-2008, 04:36 AM   #17
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exactly. I think some people in this thread believes that this will change the car's actual gear ratio or something.
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      05-20-2008, 05:24 AM   #18
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well if it doesn't work; the dynamic shift program (or bmw's term) then i guess bmw believes they are superior by not implementing such a design. Vw introduced this with thier first digital transmission in 1991.

Here's the deal: the car is using RAM or FLASH (EEPROM) to store its parameters. The dealer can wash these easily.

Likewise the fuel trim, bmw codes, and obd-2 codes.

In the olden days of motronic 9 (which bmw didn't ever use here); oddly enough it comes in the same box as DME it had both ram which was constantly fed and flash rom to tell the dealer about more naughty things.

Now if you could reset codes by unplugging the battery or using the obd-2 port or key; they are probably using battery backed up (the big battery in the trunk) RAM so if you were to let it go dead for a while it would reset its trims and throw codes in every modules "low battery".

The best way to measure if this works of course is to drive stupid aggresive then try your "method" to make it default back to granny mode. you'll know it because in every automatic i've seen the shift adaptions are in every mode (step,Drive,DriveSport).

They don't want grandma dropping it into steptronic mode and panic'ing and the car not moving in an evasive maneuver when she mats it in 6th gear. it will probably kick down. But if you drive like an arse it will probably let you get away with more mistakes assuming you have some great purpose for it.

got a copy of winOLS? mine only has older dme. I could run a ROM dump through IDA pro 5.2 and take a look see at the boot routines. I think mine stops at E46 i need more newer modules.
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      05-20-2008, 05:38 AM   #19
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starrdlux i understood approximately 50% of your post.
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      05-20-2008, 06:08 AM   #20
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Not many grrls that do ecu tuning; computer engineering; and software design in these forums? I like boost and chanel and LV and BMW

sorry i'll try to be less geeky. Ya know when you get excited you start typing away.

You know you can ask your CA to go fetch this information for you. He does give a poop.

I made mine go find out if the iDRIVE supported Bluetooth 2.0 EDR + A2DP to stream from my phone to the stereo; the answer was no. This was before i got the car. Some CA's are actually smart and will go research things for you.

I'm suprised at the general lack of information on the can bus protocol. It's not that to make a port sniffer on the can bus and take it in for service. (similar to a voice recorder but digital). Then let them service the computer and reverse engineer the protocol so you can get data from the ecu like they do.

Spend enough time with their system and you'd have enough of a record of all functions to reproduce them into an app "vag-com for vw audi". Thats how they cloned the VAG-1552 unit for the most part.

Does nobody have interest in this geeky stuff for bmw? or maybe i'm in the wrong forum.
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      05-20-2008, 07:13 AM   #21
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Quote:
Originally Posted by dhan View Post
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but what DOES that button at the end of the pedal do? does it tell the computer that the user really wants "WOT nownownow!"?
At least in AT models, it activates the transmission kickdown, which causes the transmission to shift to the lowest useable gear for faster acceleration. Pushing the accelerator past the resistance point doesn't so much say "WOT now" as it says "shift to the lowest useable gear now."
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      05-20-2008, 12:27 PM   #22
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OK, so i tried this before heading to work today. I heard nothing during the reset process like some said. My commute to work was about 20 minutes and I didn't notice anything different. I have another 1.5 hours of driving I'm going to do after work so I'll let you know if anything changes, but so far its been disappointing.
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