openecu.org

by **JimbobUK** » Sun Feb 05, 2006 4:03 pm

Just read my ECU flash image today. It is a std early UK 2001 WRX...

It is reported in EcuExplorer as AF530-7554, and the copyright string in the image is "A4SE700DEUCopyrightDENSO2000".

Is anyone familar with this ECU model? I binary diffed the image with a std A4SE900D image from here, and there is no real commonality between them.

Does anyone know whether the ECU hardware ever got revised much, and whether a 900D image would ever be applicable to my 700D? I suspect it would be a dangerous transplant!

I am a RT software engineer who doesn't mind getting my hands on some assembly code, and would love to get a disassembler working for the HC16. Perhaps there is one in the vobs at work somewhere...

Aside from that, I want to figure out where my maps are, so that I might have a play in ECUEdit. I can see a few discrete blocks of data above 0x28000, but wouldn't know how to figure out what is what.

Another question comes to mind... How swapable are ECU's between model years of WRX? For example, am I likely to be able to obtain a 900D, and fit it in place of my 700D? (Because nobody else on here seems to have made reference to a 700D ECU so far)

Many thanks to anyone who can help this n00b get up to speed!

Cheers,
James

by **New2Scoobs** » Mon Feb 06, 2006 5:34 am

I also have an MY01 UK Bugeye WRX Impreza.
I remember when I had my car remapped with E...ek the first thing the mapper did was to flash a newer firmware (A4SE900D) to my ECU (before the actual remapping began)
I presume that I probably had the 700D version to begin with.

by **JimbobUK** » Mon Feb 06, 2006 11:10 am

Wow, interesting stuff N2S.... I don't suppose that you have ever written down the exact hardware version that I imagine would be printed on the ECU casing?

If the label on your ECU were to match the one on mine then I would be half tempted to just bang in a 900D image and see what happens! :-)

Can anyone else on here add more evidence to suggest that a 900D image would be safe on my ECU?

In the mean-time, I'm going to try to identify my maps, and see ow they differ from the std 900D ones...

by **JimbobUK** » Mon Feb 06, 2006 11:26 am

Come to think of it.....

Does anyone know where the ECU Explorer ECU version id come from?

I mean the "AF530-7554" etc string...

Is there a 1:1 mapping between this and the F/W version string ("A4SE700D"), or is the former id a hardware revision number?

Thanks,
James

by **crispyduck** » Mon Feb 06, 2006 12:07 pm

JimbobUK wrote:Come to think of it.....

Does anyone know where the ECU Explorer ECU version id come from?

I mean the "AF530-7554" etc string...

Is there a 1:1 mapping between this and the F/W version string ("A4SE700D"), or is the former id a hardware revision number?

Thanks,
James

It gets it from the 'Select Monitor ID' which is 5 bytes in length. ecuExplorer has a lookup on the select monitor id and this is what the user is displayed. For more info see my How to decode/interpret the Select Monitor ID thread.

by **crispyduck** » Mon Feb 06, 2006 12:54 pm

Looking at ecuExplorer your ecu is "MY01/02 Impreza 2.0 WRX (EURO) [AF530-7554]" which is select monitor id 44 58 04 05 (hex)

I've downloaded and looked at the select monitor id of the A4SE900D on here and found it's select monitor id (address 0x2B616 .. 0x2B61A) equates to "MY01/02 Impreza 2.0 WRX (EURO) [AF531]" which is select monitor id 1B 44 58 05 05 (hex)

So this sounds like its a slightly newer version for the same car. If you already have backed up your original ROM image then I expect this one will work fine. You have your backup in the unlikely event that things go wrong.

I'd be interested to know if anyone else on here agrees with the above also.

Let us know if you need more info.
-Steve.

by **JimbobUK** » Mon Feb 06, 2006 3:10 pm

Thanks Steve, but I'm slightly worried that some of the changes in the code segment may have some sort of hardware dependency that may hang the ECU before I can get the flashing kernel back in! One would hope that it wouldn't be programmed that way, but I have to see that as a risk until I know more...

As far as my ECU image goes, I've been looking for map offsets tonight...

It seems that the 900D has a chunk of 'stuff' between 0x28906 and 0x28AC7 that is 0x40 bytes larger than that in my 700D ECU, and after which things are offset by 0x40...

Just as an experiment I padded my image by 0x40 at this address, and loaded into ECUEdit (using the 900D descriptor) to see if the maps looked sensible...

Most maps are fairly sensible looking, and similar to the std 900D, but my 700D seems (to my limited mapping knowledge) to be less agressive than the std 900D map.

One exception is the High-det fuel map, which seems to have a drastically rescaled load axis (spanning 0.4396 - 7.0062). Can someone explain where axis scaling info is stored?

Again, I would really like to hear whether many folks have had their early 01 (EU) ECU reflashed with 900D firmware sucessfully?

Many thanks,
James

by **crispyduck** » Mon Feb 06, 2006 3:16 pm

If you post your image up we can take a look and see what you mean. Recommend though that you do not write back your padded image.
-Steve.

by **JimbobUK** » Mon Feb 06, 2006 3:38 pm

No, certainly wouldn't write the padded image back!!! :shock:

Only did it as a quick way of seeing my maps in ECUEdit...

Here is my std map...

Many thanks for any time spent perusing it!

Cheers,
James

by **New2Scoobs** » Tue Feb 07, 2006 2:33 am

[quote="JimbobUK"]Wow, interesting stuff N2S.... I don't suppose that you have ever written down the exact hardware version that I imagine would be printed on the ECU casing?

If the label on your ECU were to match the one on mine then I would be half tempted to just bang in a 900D image and see what happens! :-)

-------------------------------------------------------------------------------------

The earliest i can check the hardware version on my ECU casing would be this coming weekend - if you are happy to wait until then.

by **JimbobUK** » Tue Feb 07, 2006 8:09 am

Superb N2S!!! If you could check out what is printed on there then that would be awesome! After the weekend would be great :-)

Do you have an image of what is currently programmed into your ECU? (just to compare the code section)

by **menfou** » Fri Aug 18, 2006 7:55 am

Hello,

I have a A4SE700D EU Copyright DENSO2000
You can find the rom HERE

Can you say me how can I do ?

by **NeverLies** » Fri Aug 18, 2006 8:20 am

What do u want to do ? Reflash ? Tune ?

by **menfou** » Fri Aug 18, 2006 8:35 am

I have a EU 2001 WRX and I would like to tune the ECU.
Between 3000-rev-limiter I have less than 10:1 for fuel, I want to tune Ignition with EGT, and the A/F with my AEM wideband

I am a good tuner, I tune VFAC, Hondata S300, Hondata K100/KPro, AEM EMS, my other car is a Civic Type R with Full-Race Turbo Kit, and 500whp with 22PSI.

by **menfou** » Fri Aug 18, 2006 12:48 pm

I download this xml def : http://forums.openecu.org/download.php?id=417
I used ecuEdit to modify the rom 160ko, and Subaru are crasy to put 10:1 in Hi Det Fuel Map :shock:

Tomorrow I will try a new rom, and I hope the engine will not have problem

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Does anyone know anything about the AF530-7554 (A4SE700D)

Does anyone know anything about the AF530-7554 (A4SE700D)

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