Motronic Tuning program, Audi, Porsche 944T

[shooter]

Hello,

My name is Robert and I too have been trying to get some help from Jim
C.  It does not seem like he is much into replies. I so far have
dis-assembled the code from the DME of my 1995 BMW 318 ECU. Slowly I am
reading through it and trying to figure out wat is going on.

I am an electronic engineer working in San Jose.  If you get any info
from anyone regarding how to find the fuel and ignition curve maps,
please forward the info to me if you will. I would greatly appreciate
any help. As you mentioned, this is no trivial task to understand how
the code works. Especially since I don't have a scan tool.  all I have
is a scope and DMM.

BTW the uP are probably code based on the 8051. It seems that bosch
prefers these devices.  The seimens QFP device is most likely an 80515.

r_tech at earthlink.net

Scott M. wrote:

> Hello list:
>
> My name is Scott Mockry and I am new to the
> DIY_FI list. In a previous life I worked as a VW/Nissan
> automotive mechanic for ~10 yrs but left this line of work
> to get a degree in Electrical Engineering. During the past
> few years I worked at Tektronix developing automotive
> diagnostic oscilloscopes.
>
> I looked through the DIY archives and read several posts by
> Jim Conforti and others regarding modifying the Bosch
> Motronic systems.
>
> I'm not sure if my previous message I sent to Jim made it
> alive, so I am CC:ing  the DIY list in the hope that Jim
> and others who can help will see it.
>
> I have been working with some folks on the Audi Quattro
> Internet list for the past couple of years to help
> understand the Audi Turbo Quattro ECU code,  (Hitachi
> HD6303XP uP) and have modified the EPROM data for running
> higher boost levels, changing the timing and modifying the
> fuel delivery. (CIS K-Lambda)
>
> I have been working with a programmer who did the
> the mods to the original dis-assembler program.
> I have been doing some of the on-vehicle testing as I have
> a portable 4 gas exhaust analyzer and a portable
> oscilloscope, DMM's and have access to the use of a VAG1552
> scan tool. I also helped provide some of the Audi and SAE
> technical information that describes the operation of the
> ECU system to help with the dis-assembly process.
>
> Recently I have been working with a local Audi enthusiast
> who is putting together a Porsche 944 Turbo track car and
> he is interested in modifying his fuel delivery, ignition
> timing and turbo boost levels.
>
> I have the stock DME and KLR unit out of his 944T car (1986
> model 944T I think) and would like to begin working on
> dis-assembling the code. I realize this is not a trivial
> exercise but I am dumb enough to want to continue and try
> and do it anyway.
>
> I saw a post Jim Conforti did in March 97 where he
> mentioned a program that was offered for BMW CCA members
> and Internet people that would allow tuning their own
> Motronic equipped vehicles. I assume if this program is
> available for the 944T Motronic ECU that it would not be
> necessary to dis-assemble the code. (A great relief) Is
> this assumption correct and is this program still available
> for purchase? If not, can anyone help with identifying the
> micro-processor/controller used in this 944T Motronic
> application?
>
> The 944T DME unit has the Bosch # 0 261 200 075 and it has
> a 1267355235 EPROM. What I assume is the uP is a Siemans
> B57306 40Pin DIP. The KLR unit is a Bosch 0 261 201 014
> and it uses a 126 7355138 EPROM, the uP looks to be a Intel
> B57391 40Pin DIP.
>
> I also have a Motronic ECU out of the 1991 200TQ 20V engine
> that I would like to dis-assemble the code on, (in my spare
> time)  its specs are as follows:  Motronic ECU # 0 261 200
> 451, Audi ECU part number 447 907 404AA
> EPROM # on main board 1-267-356-260,
> another IC I assume is the uP is a Siemans 68 Pin QFP
> B57656
> EPROM on secondary top board, Bosch # 1-267-356-462,
> top board has the following IC's, Siemans 68 pin QFP
> B57828, Siemans 40 pin DIP BD266320, Harris 68 PIN QFP
> TA13255A, If anyone can help identify these chips it would
> be appreciated.
>
> I have a reasonable set of diagnostic equipment if anyone
> needs information on using oscilloscopes and may allow list
> members to borrow some equipment for development work.
>
> Thanks in advance
> Scott M.
> Portland, OR