Motronic 2.10.3 (SAAB)

Bosch Motronic etc ECUs and PCMs
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Re: Motronic 2.10.3 (SAAB)

Postby flaset » Thu Jan 25, 2018 7:37 pm

flaset wrote:I will from now spend some time on trying to find the engine speed limiter/ revlimiter, it would be great to raise this a little bit.


And now people, I think I've made some progress in finding the Engine speed limiter, see below.

Adress 0xC4C8 - 5A 0C 28 0A 32 23 (8E) 03 17 1E 08 3A 33 Conversion is 912500/X = 912500/(8E=142)142=6426 rpm, to me this sounds reasonable.. :)


If a search is made on "C4C8" in the binary, it appears in four places in the code;

0xD45 - C2 E7 F0 90 (C4 C8) 20 41 42 47
0x1030- 00 7E FA 90 (C4 C8) 74 01 93 B5
0x4EEC- C2 5C F2 90 (C4 C8) 20 4F 31 D2
0x6AB0- D0 92 22 90 (C4 C8) C0 92 75 92

What do you say, am I on the right track here..? :thumbup: :thumbdown:
9³ Aero -02, 900T16 Cab -89 & 900T8 -85 on garaget.org website

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Re: Motronic 2.10.3 (SAAB)

Postby bengtåke » Fri Jan 26, 2018 8:10 am

I have used RevLimit = 7500000 / (0xC4C8 * (2 ^ 0xC4C9))

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Re: Motronic 2.10.3 (SAAB)

Postby flaset » Fri Jan 26, 2018 6:37 pm

bengtåke wrote:I have used RevLimit = 7500000 / (0xC4C8 * (2 ^ 0xC4C9))


Okay, nice equation, this should be, in the 0261204400 something like;
7500000 / (142*(2^3))
7500000 / (142*8)
7500000 / 1136=6602,11rpm

To me that's a little bit to high, but it can absolutely be the correct one.
9³ Aero -02, 900T16 Cab -89 & 900T8 -85 on garaget.org website

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Re: Motronic 2.10.3 (SAAB)

Postby bengtåke » Sat Jan 27, 2018 1:31 am

From the cars user manual
2.0i = 6600 r/min
2.3i = 6460 r/min

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Re: Motronic 2.10.3 (SAAB)

Postby flaset » Sun Jan 28, 2018 5:45 am

bengtåke wrote:From the cars user manual
2.0i = 6600 r/min
2.3i = 6460 r/min


Okay, then we have it! :thumbup:

@bengtåke
Do you have some more goodie info that can be cool to add to xdf's, like enable/disable funtions, flags, monitoring for diagnosis etc. ? :)

//
Andreas
9³ Aero -02, 900T16 Cab -89 & 900T8 -85 on garaget.org website

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Re: Motronic 2.10.3 (SAAB)

Postby FritzP » Wed Jan 31, 2018 4:28 pm

I hava explored similar ECU (2.10.3) for Alfa 145, and I have a pretty good XDF file for that.
What do you want to obtain for your project. Does the Saab have any immobilizer on these ECU's.
I will dig up and post later on.

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Re: Motronic 2.10.3 (SAAB)

Postby flaset » Wed Jan 31, 2018 6:45 pm

FritzP wrote:What do you want to obtain for your project. Does the Saab have any immobilizer on these ECU's.


Nothing special actually, just want as "complete functions"-XDF as possible before I try to carry out any tests in-vehicle.
I'm just curious how the functions enables/disables, and how the flags works for monitoring states and so on.
Just cool to be able to see as much info as possible when tuning.

I don't think there's IMMO in them for SAAB, at least not until MY97/98, is this usaually located in the "data" section or the "program" section..?

//
Andreas
9³ Aero -02, 900T16 Cab -89 & 900T8 -85 on garaget.org website

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Re: Motronic 2.10.3 (SAAB)

Postby FritzP » Thu Feb 01, 2018 3:42 am

OK, I see.
I have a bin from a Alfa 145 1.7 16v with 2.10.3 Motronic, and a pretty good xdf file.
This xdf file I have made myself, and are tested on bench simulator.
I post here the bin and xdf.
This file are pretty similar to your Saab file, and I think you can make a equal xdf based on this one.
Feel free to comment.
Attachments
Alfa 145 1267358699.xdf
(335.38 KiB) Downloaded 15 times
Alfa 145 1.7 16V_1267358699.bin
(64 KiB) Downloaded 13 times

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Re: Motronic 2.10.3 (SAAB)

Postby bengtåke » Thu Feb 01, 2018 5:31 am

here is my files
Attachments
2_3.xdf
(216.33 KiB) Downloaded 16 times
2_3.bin
(64 KiB) Downloaded 13 times

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Re: Motronic 2.10.3 (SAAB)

Postby flaset » Thu Feb 01, 2018 5:46 pm

Nice!
Thank you guys, I'll have a look at these. :thumbup:

//
Andreas
9³ Aero -02, 900T16 Cab -89 & 900T8 -85 on garaget.org website

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