Which ECU can mount instead original 8D0907551 on first euro S4 B5?

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Topic: Which ECU can mount instead original 8D0907551 on first euro S4 B5? (Read 7601 times)

scalp06

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	Which ECU can mount instead original 8D0907551 on first euro S4 B5? « on: January 09, 2013, 07:37:34 AM »

Hi, I would tune an euro S4 with full RS4 setup, but i'm afraid the stock ecu isn't Ok for good job...

Can you tell me what number of ecu is 100% Ok for replace this prehistoric ecu and is OK to flash over OBD?

I've already tuned S4 with C box (512kb) but no way with OBD (with magpro tool or mpps) only with bootmode... ok for a basic remap but for a st3 Undecided

too long procedure!!!

Is a D box (1mb?) full compatible and OBD flash ok? Or does I use any 8D0907551x for this job? No hardware issue, or does I flash any 1mb ecu with a dump from D box?

Thank for your help.


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prj

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	Re: Which ECU can mount instead original 8D0907551 on first euro S4 B5? « Reply #1 on: January 09, 2013, 07:41:43 AM »

Would need to check pinouts.

But regardless if 551C or 551D, you will not be able to flash it over OBD in this car I think.
The problem in it, is the cluster. It will just randomly hang up a KWP2000 session after 30 seconds or so.

So regardless of what you do, you need to bypass the cluster and run a direct K-Line to the OBD connector.


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scalp06

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	Re: Which ECU can mount instead original 8D0907551 on first euro S4 B5? « Reply #2 on: January 09, 2013, 02:09:46 PM »

So, what is the best choice (the easyest way!)? Find K line from cluster harness and install a switch for cut the line when obd flash?

Or better to find the k line from harness ecu and connect this with séparate power line to spécific cable ?


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prj

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	Re: Which ECU can mount instead original 8D0907551 on first euro S4 B5? « Reply #3 on: January 09, 2013, 02:47:16 PM »

I think you need a switch, because the cluster will pull the K-Line low otherwise.
I might be wrong though on this.

And I think the K-Line is connected through the cluster to the ECU.
The cluster uses the K-Line between itself and the ECU as a so called "W-Line" to transmit immo info.

At least that is how it works in previous ECU's, I have not looked exactly at 2.7TT.


« Last Edit: January 09, 2013, 02:48:55 PM by prj »	Logged

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Rick

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	Re: Which ECU can mount instead original 8D0907551 on first euro S4 B5? « Reply #4 on: January 12, 2013, 01:34:30 PM »

Yea, the K-line does pass through the clocks. But I have tools that flash it over OBD no problem. Nef won't do it though, but then Nef won't do C's full stop sadly.

Rick


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adeyspec

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	Re: Which ECU can mount instead original 8D0907551 on first euro S4 B5? « Reply #5 on: January 12, 2013, 03:54:39 PM »

Quote from: Rick on January 12, 2013, 01:34:30 PM

Yea, the K-line does pass through the clocks. But I have tools that flash it over OBD no problem. Nef won't do it though, but then Nef won't do C's full stop sadly.

Rick

Really?! Ow man, I've swapped my 551 to 551c with hopes of starting to play with a few bits myself, Built a bench harness and ordered a newer USB cable with the right chip in.... Pants :-/


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Rick

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	Re: Which ECU can mount instead original 8D0907551 on first euro S4 B5? « Reply #6 on: January 12, 2013, 04:18:48 PM »

No,

afraid not.

Rick


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prj

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	Re: Which ECU can mount instead original 8D0907551 on first euro S4 B5? « Reply #7 on: January 12, 2013, 04:58:15 PM »

Quote from: Rick on January 12, 2013, 01:34:30 PM

Yea, the K-line does pass through the clocks. But I have tools that flash it over OBD no problem. Nef won't do it though, but then Nef won't do C's full stop sadly.

Rick

Curious which tools and at which baud rate.
At least ME7Logger will not work with this dash and I tried all sorts of baud rates. Nor do any tools that communicate with this ECU the same way as with the newer ones.
Same issue, KWP2000 session gets shut some time into the flash.


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Rick

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	Re: Which ECU can mount instead original 8D0907551 on first euro S4 B5? « Reply #8 on: January 13, 2013, 06:45:41 AM »

Genuine MPPS, Magpro 5.5 does it, it uses a different method. It tries to connect, says mode not supported, asks to cycle the ignition and then connects.


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prj

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	Re: Which ECU can mount instead original 8D0907551 on first euro S4 B5? « Reply #9 on: January 14, 2013, 08:00:04 AM »

Ok, I guess it manages to tell the cluster to shut up properly through a special sort of init.
Means that to log it, I would still have to write my own data logger though.


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