[s-cars] RE: MTM ECU Problem (LAC)

[Mark Strangways]

So, the revised code on the chip deals with changes in the ECU, not in the
code operating the motor ?
So, as long as the ECU has the correct base chipset that was shipped with
it, or it is known, then the correct modified chipset can be installed. I
mean to say that the 551D chips need to have , for example, the MTM stage 1+
551D code written to it.

The different software version have no impact on engine management ?
Thanks
Mark
----- Original Message -----
From: "Mihnea Cotet" <mik at info.fundp.ac.be>
To: "Mark Strangways" <strangconst at rogers.com>
Cc: <s-car-list at audifans.com>
Sent: Friday, April 04, 2003 6:06 PM
Subject: Re: [s-cars] RE: MTM ECU Problem (LAC)


> Mark/all,
>
> Software revisions don't have anything to do with VIN #s. On the same year
> S4, I've seen up to 3 different ECU #s and about 3 or 4 different software
> revisions. As far as total software revisions (for S4/S6s, if I have to
> count S2/RS2, then there are even more out there), there are about 6 or 7
> of them, and I only have 5, though I could find the missing ones even if
> there's no actual point in that...
> The point about software revisions/ECU numbers is that software versions
> are made for a certain ECU number and even though one can use 551D chips
in
> a 551AA ECU, the result won't be the same because the software version for
> the 551D chip isn't the same at all and the chips work differently in the
> firmware part, even though the "software" part (lookup tables) are about
> the some...
>
> The motors are identically the same, agreed on that one, but the ECUs
> aren't. There are a few different ECU numbers (551A, 551AA, 551B, 551C and
> 551D end numbers) for cars using the very same AAN motor.
>
>
>
> HTH,
>
> Mihnea
>
> At 17:38 4/04/2003 -0500, Mark Strangways wrote:
> >So..
> >
> >Given a 92 S4 and a 93 S4, what could the potential differences be
between
> >different versions of the factory software.
> >The motors are the same thru the model(s) S4 and S6. Are there any
> >differences in the motors that we should know of ?
> >
> >I think my 92 S4 has a ECU from a 93 or 94 S, and my TAP stage 1 chipset
is
> >in the other guys S.
> >We did note that his didn't pull as well as mine did, but that doesn't
> >explicitly mean the software is not valid for that VIN #.
> >
> >Do you know how many factory software revisions /  versions where made ?
> >
> >Mainly just curious :)
> >
> >thanks
> >Mark S
> >----- Original Message -----
> >From: "Mihnea Cotet" <mik at info.fundp.ac.be>
> >To: "DOUGLAS LANDAETA" <landaeta1 at comcast.net>
> >Cc: "Fifield, Douglas" <Douglas.Fifield at TENNANTCO.com>;
<wmahoney at disk.com>;
> ><s-car-list at audifans.com>
> >Sent: Friday, April 04, 2003 3:16 PM
> >Subject: Re: [s-cars] RE: MTM ECU Problem (LAC)
> >
> >
> > > Doug,
> > >
> > >
> > > My point wasn't about the wrong ECU in the wrong car because no such
> >things
> > > exist. Take a 91 S4 ECU and put it into a 97 (Euro) S6 and it will
work
> > > perfect if the chips inside it are made for that particular ECU. If
you
> > > swap chips from one ECU to the other, the car might not run as it
should,
> > > simply because the chips weren't made for the ECU they are used in.
Such
> > > things happen quite often and people wonder why their car doesn't work
as
> > > someone else's, which has the same chips in its ECU, and the point is
*the
> > > wrong chips in the wrong ECU*.
> > >
> > > But as I can't see the ECU, the car nor the chips in front of my eyes,
I
> > > can't commit for sure and thus I'll say YMMV.
> > >
> > > Cheers!
> > >
> > > Mihnea
> > >
> > > '85 coupe quattro - 20VT, soon to have 430+ HP (when time permits)
> > >
> > > At 14:11 4/04/2003 -0500, DOUGLAS LANDAETA wrote:
> > > >Minhea noted:
> > > >
> > > >Blinking Engine light -
> > > >-bad checksum in the ECU chips (not calculated correctly)
> > > > > -chips not made on basis of the ECU number you guys are running
> > > > > (which is
> > > > > bad because there are several software versions depending on the
car's
> > > > > equipment and chips aren't the same in their "firmware" part)
> > > >
> > > >man-o-man-o-man - This sounds like the wrong ECU (dare I say
installed)
> > > >or being thrown into the wrong car. How can any reputable tuner, and
I
> > > >have heard that Anderson does fine work, allow this to happen? Many
> > > >smaller, and less expensive Audi OEM parts are different depending on
> > > >VIN.
> > > >
> > > >Douglas' car is one fine example of an *extremely* rare low mileage,
> > > >well maintained Pearl Avant.  My Soapbox - to all the vendors,
> > > >mechanics, tuners and the supporting industry that we spend our money
> > > >in, which is saying a lot in this economy, QUALITY COUNTS!
> > > >
> > > >Doug L (if I'm off-base, I take it all back)
> > > >94 S4
> > > >
> > > >_______________________________________________
> > > >S-CAR-List mailing list
> > > >S-CAR-List at audifans.com
> > > >http://www.audifans.com/mailman/listinfo/s-car-list
> > >
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>