Re: VR6 ECU

[Thom Peluso <tfp@tristate.pgh.net>]

I have access to burn copies, examine, sniff, hack... whatever chips like 
this in my work in electronics R&D. If anyone wants me to take sniff or 
two for'em, let me know. If someone has an extra/junkyard or whatever 
chip, I'd be glad to see what I can do with it.

Thom


On Wed, 13 Aug 1997, Jean-Luc Trahan wrote:

> Jayrham Chulani wrote:
> > 
> > Ok guys and gals.  I think I might have asked this question before but I
> > have yet to get a definite answer.  Does anyone know hwere I can get some
> > technical info about the BOSCH Motronic ECU on our cars?  I am
> > specifically interested in finding some info about what kind of
> > microcontroller and what size/speed/type of EEPROM they use.
> > 
> > TIA,
> > --Jay
> > 1996 Windsor Blue GLX
> > Autotech Sport Tuned Exhaust
> > K&N Filter minus Airbox Diffuser
> > Curb Feelers 8-)
> 
> This post is mostly for the technically minded...
> 
> I do not remember off which Web site I took this info [it may be pure
> smoke ;) ], but it seemed that VW (or their contract developper, BOSCH)
> used Motorola's 68300 series 16-bit microcontroller.  Memory was
> reported as being an 512K EPROM (SOLDERED, OF COURSE!!!)  Clock speed
> was not mentioned, but in my experience as an electronics designer and
> the quantity of information the MPU must process per unit time, I would
> think that 25-33MHz is a real possibility.
> 
> Hacking the code for this application would not be "easy" like the older
> MPU's since the code was most probably written in C, which, when
> compiled, is a bit harder to reverse engineer that pure assembly
> language (like I said at the beginning, this IS rather technical!!!) 
> And with all this OBD II shit, the algorithms would be rather complex.
> 
> As for technical documentation, I think the best bet would be to have a
> contact within BOSCH who doesn't care for his/her job if he/she gets
> caught.  I have a friend that recently bought a manual published by
> BOSCH for the F?rd/M?zd? 2.5L V6 used in the MX-6/Pr?b? cars.  He says
> the manual (I haven't personally seen it yet) is great for learning
> about the different techniques for fuel injection, air flow measurement,
> etc. It is useful for somebody who wants to learn how to trick the ECU
> in seeing different data from its sensors that may improve performance. 
> However, it does not provide any real info on actual hack
> implementations at the software/hardware level.  In other words, you are
> still on your own.
> 
> 
> -- 
> Jean-Luc Trahan
> R&D Engineer
> Gecko Electronique inc.
> jltrahan@gecko-electronic.com
> 
>