[s-cars] Differences in ECU's?

[chris chambers]

Michael,

Who installed the MTM chips? Is one of them on top of
another circuit board and then on top of the main board of the ECU?
I'm gonna guess you have a decryption circuit underneath one
of your chips.

It is quite common for some chip manufacturers to install a "daughter"
to decrypt the code on their chip, and then encrypt the code on their
chips. The chips are then mounted on this extra circuit some call a
"daughter board"

Look at the pic at this link, it is of just such a chip.
http://img.photobucket.com/albums/v48/chrisanjenn/Audi%20S4/7ac02504.jpg

If you have this you need to remove the "daughter board" and solder
in a socket into the ECU where the "daughter board" was installed.


HTH
Chris




--- Michael Bess <mlbess at optonline.net> wrote:

> Chris:
> 
> We checked out the obvious already.  Bob Myers burned the chips. 
> Before he
> shipped the last pair he tested them in his ECU on another S6...all
> OK.
> Notch in the chips facing down (when the pressure xducer is at 9
> o'clock
> with the ECU open) just like in Bob's posted photos & directions. 
> Chips are
> marked Boost or Timing so that's not the problem.  I'm stumped; my
> mechanic
> is frustrated.  Or is it I'm frustrated and he's stumped??
> 
> METALS MARKETING & TECHNOLOGY
> 
> Michael Bess
> President
> 
> 
> -----Original Message-----
> From: chris chambers [mailto:fastscirocco_2000 at yahoo.com] 
> Sent: Thursday, March 16, 2006 2:00 PM
> To: mlbess at optonline.net; s-car-list at audifans.com
> Subject: Re: [s-cars] Differences in ECU's?
> 
> As far as I know all of our S-cars have the same ECU
> 
> You are installing the chips in the wrong sockets
> You are installing the chips backwards in the right sockets
> Whoever is burning the chips isn't doing it right
> Whoever is burning the chips got a bad batch of chips
> 
> 
> That is all for now
> 
> PDHBOWWCID?
> 
> Chris
> 
> 
> --- Michael Bess <mlbess at optonline.net> wrote:
> 
> > I am experiencing a problem with the MRC RS2 ECU chips.  I
> currently
> > have
> > the MTM 1+ installed.  We swap in the MRC chips and the car simply
> > will not
> > start.  I thought perhaps there was a problem with the chips and so
> > got
> > another set to try.  Still no start; put the MTM chips back in and
> > all is
> > fine.  The P/N on my ECU is 4A0907551AA.
> > 
> >  
> > 
> > Any thoughts?
> > 
> >  
> > 
> > Mike Bess
> > 
> > '95 S6
> > 
> >  
> > 
> > _______________________________________________
> > S-CAR-List mailing list
> > S-CAR-List at audifans.com
> > http://www.audifans.com/mailman/listinfo/s-car-list
> > 
> 
> 
> Make April 15th just another day http://www.fairtax.org
> 
> 
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