NefMoto

Hi,

i am looking for the Bosch Specifications of Motronic 2.3.

Thanks for Your help!
Karel5000

If you find them let me know (not likely).
They certainly do not exist in electronic form in the wild, only on paper.

I strongly believe, that someone has scaned them already ;D

Then 'who ever' scanned them should post them.

And I believe you are wrong. I have done 100+ M2.3.X cars incl. full disassembly of these ECU's and modification of factory code to support 800+ hp.
Maybe a good idea is to ask what you want to do.

I woud like to tune a bit my car. Disassembly without knowledge of the Motronic structure, it takes too much time...

For a stage 1 chip it is enough to modify 6 maps in the ECU.
Modifying more will yield a better result, but the basics are pretty easy.

Go to www.motronic.ws (http://www.motronic.ws) - it contains everything that is needed to get started.
Also, you can use a tool I wrote. I have attached the binary. It will find all maps in the fuel/ign chip and generate an XDF.
The boost/knock chip you will have to find out yourself, but if you have emu with trace, it is not hard.

And if you don't have emu with trace, then you should not be doing this anyway.

Thanks very much for Your help!

I would like also to know, how the control of the Motronic 2.3 looks like, how the maps with corrections are connected together... Can You also help me to find some specifications, please? Without this knowledge is tuning a bit dangerous...

Thanks!

I already told you there are no specs in the wild.
I learned by full disassembly.

I will answer concrete questions, but unless you manage to find out the basics yourself, I am not going to waste my time, sorry.

I know the internet site, You wrote me. I know that basics...

If I need something concrete, I will write You. Thanks.

Won't start a new topic.
Is it possible to get a list of the descriptors? ;)

Some descriptors are assigned dynamically, and then used only for one map lookup in a temporary variable.
If you want to learn what is what, you will have to disassemble the measuring block routines, and then correlate that to the OBD blocks.

That's the problem. The M2.4.1 from the V8 don't have measuring blocks like other motronics.
I have one group of 10 values, rpm, ignition, lambda correction and a lot of other stuff for the idle control (maybe MAF signal, I have to check in vehicle), that's all.
I know that there were functions for the A/C detection etc.

The 3.6 PT does not have measuring blocks. The 4.2 V8 does.
But go on and disassemble the AAN measuring blocks in 2.2T, the ram values are mostly the same.

Hint: JMP @A+DPTR
This will also help you:
http://www.blafusel.de/obd/obd2_kw1281.html#7 (http://www.blafusel.de/obd/obd2_kw1281.html#7)

ID is always pushed into the buffer first, then A, then B... Go through the ID's and you will understand what is what and how to convert the RAM values to real values in the ECU.

I no expert at the 3.6 V8, but some has problems to connect with VAG COM.

At the 4.2 V8 I have this values:
http://www.lovania-it.de/audiv8/repleitfaden/site/b_site/rep-1257_1.jpg

Coolant temp, load, rpm, ignition and some idle values.

How ever, I only found this VAG COM picture.
(http://s2central.net/images/vagcom_ecu_blocks.gif)

At the V8 I only have the first line with the 10 unnamed "cells".
I only have the Group 0 and nothing additional.
Maybe I can hack the code to get more information ;)

Of course, informations are nearly the same but not "translated" is this nice looking.

Here the 5cyl has some more groups:
http://s2central.net/vagcom_4.html

Get a later version of the binaries, they should have measuring blocks.

Of the V8 bin or general a later motronic bin?
I hope I'm able to add this feature. But have to learn more assembler :D

Later 4.2 V8 bin should have measuring blocks stock.

Hmm I have 1993 file from ABH and there is function not available.
But I will try to get the AEC files, maybe they have this...

The one that was fitted to the S6 should have it.
I have written a full custom data logging routine for the Audi 3.6 PT ECU...

You seem like a nice guy, send me an e-mail and I'll see what I can do.

You have an PM ;)

I took a look into Audi V8 ABH and Audi RS2 motronic ign/fuel file at IdaPro.
At the function graph I see differences and the offset in the adresses but understanding :-(

Is it allowed to post the code graph as PDF here?
Maybe somebody is better in assembler than me :D

Maybe this will help you.
It is from ABH engine original + somekind of tuning. Read today from one ECU.
I hope I can post it here.
Year 1995. Should have measuring blocks. Got only ECU. Haven't tested.

Thanks for the dataset. AEC I still not had yet.
The tunning is not from fastech I believe - nearly nothing changed except rev limiter?!
Some fuel and ignition more at higher rpms, WOT some extra fuel and ignition.

Funny how the checksum is solved :D

Pro tuning with ++ button :D

I can't believe this. At ignition I changed much more.

there was sticker FASTECH on chips. I don't know who have made this.
Yes and interesting why cheksumm wasn't calculated.

Adding to this thread in an attempt to keep the "ABH" conversations in one place...

In North America, the V8q with ABH was only sold with an automatic gearbox. If I want to convert to manual transmission, can I use this attached file that Acki posted in another thread?

Yes. You can use the file you need for your transmission.