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View Full Version : Golf IV 1.6 16V Marelli 4MV EGR Off and checksum correction



NikolaWeb
28th August, 2017, 09:20 PM
Hi,

I read my Marelli 4MV ECU 036906034BH and disabled DTC P0401 and P0402 for blanked EGR (with MTX DTC remover 1.8.5.0)

I'm not sure how to recalculate checksum now, I tried ultimo checksum corrector... but I'm not sure does it fully support 4MV ECU.

I attached all 3 files, in case someone can check it. Thanks!

shooting
28th August, 2017, 09:42 PM
Hi,

I read my Marelli 4MV ECU 036906034BH and disabled DTC P0401 and P0402 for blanked EGR (with MTX DTC remover 1.8.5.0)

I'm not sure how to recalculate checksum now, I tried ultimo checksum corrector... but I'm not sure does it fully support 4MV ECU.

I attached all 3 files, in case someone can check it. Thanks!

Here with Checksums fixed

wbr

QwoleQ
28th August, 2017, 09:45 PM
check this

QwoleQ
28th August, 2017, 09:56 PM
chs ok
check it

NikolaWeb
28th August, 2017, 09:57 PM
Thanks for fast answers!

@shooting (http://www.digital-kaos.co.uk/forums/member.php/127803-shooting) attached files is full of zeroes when opened in hex editor, seems that data is lost somewhere.

@QwoleQ (http://www.digital-kaos.co.uk/forums/member.php/485438-QwoleQ) you probably didn't click on upload button (that happened to me too, button is far on the right - you have to do horizontal scroll to see it)

QwoleQ
28th August, 2017, 09:58 PM
I can not add a file.
Why?

QwoleQ
28th August, 2017, 10:03 PM
OK I think so

shooting
29th August, 2017, 08:57 AM
Thanks for fast answers!

@shooting (http://www.digital-kaos.co.uk/forums/member.php/127803-shooting) attached files is full of zeroes when opened in hex editor, seems that data is lost somewhere.

@QwoleQ (http://www.digital-kaos.co.uk/forums/member.php/485438-QwoleQ) you probably didn't click on upload button (that happened to me too, button is far on the right - you have to do horizontal scroll to see it)


Here corrected, I unloaded the wrong file...

wbr

NikolaWeb
29th August, 2017, 12:11 PM
I'm getting "P0605 Rom Error" when I write checksum corrected file with Kess v2 and thus I can't start the car.

Kess ask for new file and original (so maybe it makes some mistake in checksum)?
But it's strange that I can flash original back and in step for asking original I select modified file (the last i flashed) and car runs...

I wonder now should I select same file in both steps to avoid kess recalculating checksum? (maybe it's wrong because I have to select 1.4 engine instead 1.6... they listed marelli protocol only for 1.4 16v)

NikolaWeb
1st September, 2017, 06:15 PM
I disabled only DTC P0401 and recalculated checksum with WinOLS, so now I'm not having ROM error anymore... but I got immo error P1570.

I wonder is there some special procedure to adapt new rom with immo on this Marelli 4MV ecu? Car works without issue when I write back original file.