error checksum siemens renault twingo sirius32N

[Makx]

Hello all,
wonder if anyone has the pasienza this of spiearmi why after you change the attached file by ecm_titanium intuitive to have a correct checksum but when I tried to load the file into the ecu with ktag crashed as soon as I opened the file to load, giving me checksum error.

in attachment ori and two .mod with an attempt to immo off.
the .mod where following the instructions found here and on the web I gave FF value from 4000 to 8000 I managed to write it in the ecu without problems, while the one to my whim and attempt I brought in the FF value from the very first 3xxx up to 8000 when I tried to write it I was blocked by ktag for checksum error.

checking with the ecm, I said to both cecksum correct by selecting the family renault siemens 29F200.

I am trying to learn and if someone can give me some advice makes me a great favor
thanks

[cinqueturbo]

I do not extract the files from the archive..
Cattura.JPG

[Makx]

I have recreated the archive .zip and reloaded...
before uploading it to me opens it without problems... I hope
thanks in the meantime cinqueturbo

[Makx]

I tried the download and well to me it does not open, nor the second that I have uploaded.
maybe it's a upload problem using chromium browser, which among other things tells me this portal as a dangerous site.

now I'm retrying this upload with mozilla... hopefully

[cinqueturbo]

I don't know where you read to bring the middle of the file to FF to immo, but I would say that is normal and it & fortunately it is not written from Kess.. if it was some other tool of him was inside, and to God...

In addition as you want to correct the cecksum if you all of the information and bases needed are in that area of the file that you brought to FF ?

if you need immo, partial or Total, there are software that do that very well..

With regard to the portal dangerous the Administrators are working to resolve it permanently..

[Makx]

First of all, thanks for the tips cinqueturbo, I realized something fundamental and important that I did not know, in fact I was convinced of the contrary

I knew that the checksum is the result of a calculation (algorithm) dependent on the values of the individual bits of a file, but I never thought that there was an area in flash where they were residing of the data is important for this result.

I thought, in fact, that the correction of the checksum happens by changing bits in some dead zone in any of the files, or areas unnecessary from the point of view of the correct operation of the ecu, but I never thought there was an area exclusively dedicated to this.

I had read some mange in achieving partial or total on this ecu, under penalty of anomalies on the operation of the instrument or the ac or the proper functioning of the engine itself.
the only solution I read to mount an emulator or, only in the case of a car without a can line, take it from 4000 to 8000, the value at FF and cut the pin 58.

bring the FF value to the whole of the larger area was a bad idea that I am not even explain from where I was born.

in fact I have not used Kess but Ktag.

in fact, this ecu I was left with a car demolished and used as a guinea pig; some that lock it would still be a sin.

today I scodificato partial using a dedicated software, and I got the exact same result of the file I already had loaded into the ecu by modifying it with winols and bringing value ff 4000 to 79ff (I read up to 8000 on some discussion, but watching the 2d file I had came from the intuition to stop an address before).

Thanks again for the very useful explanation

Hello

[jah83]

Hi, if you wanna make a off on sirius32 no can just take flash and use Time immo off solution. Work good and don't need to change cks cause it's out of CkS zones