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General E46 Forum
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Old 03-12-2013, 12:27 PM   #1
fastsoup
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ECU/TCM update

Hey Guys,

Taking my car to a local Indy Shop for an oil change this Friday and I also mentioned that I wanted my ECU flashed due to my transmission being confused around 35-50k coasting, and it occasionally kicks me down or up into the next gear. I then told him that in 2009 a new ECU was installed with the latest software, which he then advised that that is probably going to host the most current software. He told me that when he hooks my car up that he will delete the flash?? Something along those lines, to see if that helps my problem?

My question is, would my "kick" be from the ECU or TCM? And, does anyone know if there has been a new software release since 2009 for the ECU?

Last edited by fastsoup; 03-12-2013 at 12:34 PM.
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Old 03-12-2013, 12:40 PM   #2
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Hey Guys,

Taking my car to a local Indy Shop for an oil change this Friday and I also mentioned that I wanted my ECU flashed due to my transmission being confused around 35-50k coasting, and it occasionally kicks me down or up into the next gear. I then told him that in 2009 a new ECU was installed with the latest software, which he then advised that that is probably going to host the most current software. He told me that when he hooks my car up that he will delete the flash?? Something along those lines, to see if that helps my problem?

My question is, would my "kick" be from the ECU or TCM? And, does anyone know if there has been a new software release since 2009 for the ECU?
Terra would know better but I'm guessing 2009 is way beyond the newest release. I'm also almost certain the TCM is responsible for shifting (valve bodies, solenoids, t/c stall, etc) I could be wrong.

Is your MAF in good shape and fluid/filter renewed?
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Old 03-12-2013, 12:48 PM   #3
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Terra would know better but I'm guessing 2009 is way beyond the newest release. I'm also almost certain the TCM is responsible for shifting (valve bodies, solenoids, t/c stall, etc) I could be wrong.

Is your MAF in good shape and fluid/filter renewed?
Yes, MAF/ Throttle body cleaned. Transmission fluid/filter done 15k miles ago.
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Old 03-12-2013, 12:57 PM   #4
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So you installed a completely new DME in 2009?
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Old 03-12-2013, 01:13 PM   #5
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So you installed a completely new DME in 2009?
It was under warranty with the previous owner (original owner). The ECU was acting erratic and the dealership installed a new one with the latest software
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Old 03-17-2013, 12:51 PM   #6
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So I took my car to a local indy shop to get an oil change (my hoist is on vacation), and to have my ECU and TCM checked and updated.

I had an issue going into reverse after a long drive. The R would take a second to engage and it was ROUGH when it did.

He checked the ECU and, as anticipated, there was no update. The TCM was also up to date with the last software being from 2007. He ended up deleting my adaptions, and while inside, changed my inspection to 12,000k instead of 24,000, and also turned on the "window roll up from fob" feature.

I left the dealership and the tranny felt "new" to me. I guess it was in "learning" mode. What I really noticed was when I engaged reverse; it was smooth as butter, felt almost new!

Moral of the story, have your adaptions deleted from time to time...it seemed to help for me.

Last edited by fastsoup; 03-17-2013 at 12:53 PM.
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Old 03-17-2013, 02:16 PM   #7
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on my honda i just pull the hazard fuse from time to time, this wipes the ecu and makes it relearn, clears bugs in the process

this can't be done on an e46?

i'm not saying it would be the same fuse, but, is there not a way to wipe ecu by killing volt to it?
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Old 03-18-2013, 01:40 PM   #8
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on my honda i just pull the hazard fuse from time to time, this wipes the ecu and makes it relearn, clears bugs in the process

this can't be done on an e46?

i'm not saying it would be the same fuse, but, is there not a way to wipe ecu by killing volt to it?
That is a good question and I have no idea.

I remember my Lexus needed to have the battery disconnected for 15 mins or so...not sure I would do that with the 330i however.

Still no issues with the tranny and I have been driving it now for over 150 miles; R is still good.
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