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Board index » Engine Management Systems - Analysis and Tuning » Nissan » Nissan ECU Analysis

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mix0000
 Post subject: How to Find Checksums
PostPosted: Fri Nov 28, 2025 2:39 am 
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Joined: Fri Sep 10, 2021 12:42 am
Posts: 170
Does anyone know how to correct the checksum for an ECU that currently lacks a definition file?
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Ludo80
 Post subject: Re: How to Find Checksums
PostPosted: Sun Nov 30, 2025 5:50 pm 
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Joined: Sat Nov 23, 2019 5:02 pm
Posts: 37
I can try with dimsport software, send me ori and mod file if you want to test it.
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mix0000
 Post subject: Re: How to Find Checksums
PostPosted: Mon Dec 01, 2025 12:26 am 
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Joined: Fri Sep 10, 2021 12:42 am
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Ludo80 wrote:
I can try with dimsport software, send me ori and mod file if you want to test it.

Original and modified versions.
Thank you for your cooperation.


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Alex-Angarsk
 Post subject: Re: How to Find Checksums
PostPosted: Mon Dec 01, 2025 1:50 am 
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Joined: Sat Mar 30, 2019 3:04 am
Posts: 362
I didn't see anything special in the tuned bin.


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_________________
SKYLINE 06`CPV35/MT6/VQ35DET/Cosworth/Eagle/ACL/ARP/Supertech/Cometic/MOCAL/
KAKIMOTO RACING/FUJITSUBO/Greddy/HKS/OBX RACING/AEROMOTIVE/UpRev

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mix0000
 Post subject: Re: How to Find Checksums
PostPosted: Mon Dec 01, 2025 3:25 am 
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Joined: Fri Sep 10, 2021 12:42 am
Posts: 170
Alex-Angarsk wrote:
I didn't see anything special in the tuned bin.

I don't have the Rom Rider definition file, so even if I tune it, I can't fix the checksum. If there's any way to do it, I'd appreciate it if you could let me know.
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Ludo80
 Post subject: Re: How to Find Checksums
PostPosted: Fri Dec 05, 2025 3:54 pm 
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Joined: Sat Nov 23, 2019 5:02 pm
Posts: 37
mix0000 wrote:
Ludo80 wrote:
I can try with dimsport software, send me ori and mod file if you want to test it.

Original and modified versions.
Thank you for your cooperation.


Try that mate


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mix0000
 Post subject: Re: How to Find Checksums
PostPosted: Sat Dec 06, 2025 2:51 am 
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Joined: Fri Sep 10, 2021 12:42 am
Posts: 170
Ludo80 wrote:
mix0000 wrote:
Ludo80 wrote:
I can try with dimsport software, send me ori and mod file if you want to test it.

Original and modified versions.
Thank you for your cooperation.


Try that mate

Thanks for the file.
But I don't understand how to use this file to verify the checksum.
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Alex-Angarsk
 Post subject: Re: How to Find Checksums
PostPosted: Sat Dec 06, 2025 5:39 am 
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Joined: Sat Mar 30, 2019 3:04 am
Posts: 362
The checksums have been recalculated correctly. I confirm.

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SKYLINE 06`CPV35/MT6/VQ35DET/Cosworth/Eagle/ACL/ARP/Supertech/Cometic/MOCAL/
KAKIMOTO RACING/FUJITSUBO/Greddy/HKS/OBX RACING/AEROMOTIVE/UpRev

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murphys_law
 Post subject: Re: How to Find Checksums
PostPosted: Mon Dec 15, 2025 7:39 pm 
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Joined: Tue May 24, 2016 1:45 am
Posts: 216
mix0000 wrote:
Does anyone know how to correct the checksum for an ECU that currently lacks a definition file?



The best way to do this is to slow dump the rom file(looks like you've already got it) then use nissutils to get the keys and use nisprog to fix the checksum. Someone here can probably help you with it if you are wanting to learn.

https://github.com/fenugrec/nissutils

https://github.com/fenugrec/nisprog
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