NefMoto > Noob Zone > Noob Questions (Moderator: turboat) > Changes to FF section of the ME7.5 file?
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Author Topic: Changes to FF section of the ME7.5 file?  (Read 5890 times)
iborisov
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« on: January 03, 2018, 02:21:49 AM »
I'm looking at a tuning file and wonder what is this change in the part of the FF to the end of the file?
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gman86
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« Reply #1 on: January 03, 2018, 03:18:03 AM »
It's the tag of the person who wrote the software. Namely someone called "Arjan"
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iborisov
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« Reply #2 on: January 03, 2018, 05:04:30 AM »
Hey gman86, thanks for the reply.

How did you understand what was changed? What FF section is and is there rules ( map adresses ) where and what to change?

Please, share information (link) about FF section in ME7.5 ECU files. I want to read and learn it.

If I'm not wrong I have read that there is placed a code for Launch control...

And another question: 

Is it possible for the person who remapped the ecu to put some protection somewhere and now if I try to write a new file over the OBD something to go wrong?

What does it mean when people talking about Locked ECUs (like Revo do ) for read and write.  Is there locking code in ECU file or in EEPROM file?
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nyet
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« Reply #3 on: January 03, 2018, 02:14:57 PM »
Dont bother trying to decode someone else's file. Just write your own and call it a day.

There are a million threads here that explain why.

In short, yes you can place custom code in unused space, or even just text or data as a tag.
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4ringpieces
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« Reply #4 on: January 03, 2018, 03:01:30 PM »
I like to insert “Fuck off cunt” into my files

Also changing bits like high octane switch and knock control so if anyone was to dick about in the file it’ll probably melt haha
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gman86
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« Reply #5 on: January 03, 2018, 03:04:37 PM »
Quote from: iborisov on January 03, 2018, 05:04:30 AM
Hey gman86, thanks for the reply.

How did you understand what was changed? What FF section is and is there rules ( map adresses ) where and what to change?

Please, share information (link) about FF section in ME7.5 ECU files. I want to read and learn it.

If I'm not wrong I have read that there is placed a code for Launch control...

And another question: 

Is it possible for the person who remapped the ecu to put some protection somewhere and now if I try to write a new file over the OBD something to go wrong?

What does it mean when people talking about Locked ECUs (like Revo do ) for read and write.  Is there locking code in ECU file or in EEPROM file?

Empty areas of the flash are usually identifiable by big blocks of "FF". The end of a flash read is the most common area. I was able to decipher the tag because I can work out 8 bit hex values in my head.

Some tuners will lock an ECU to prevent it being read. It looks like yours hasn't. I would say it's highly unlikely that someone has went to the hassle of write protecting the ECU but allows you to read the calibration freely.

As Nyet said, scrap the file and find an original for your ECU and work with that. Use the S4Wiki to gain a basic understanding as to how the ECU works and what you need to change to tune it. The S4Wiki assumes that you have a solid understanding of whats required to tune a car beyond simply increasing boost pressure.
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_nameless
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« Reply #6 on: January 03, 2018, 03:19:56 PM »
Quote from: gman86 on January 03, 2018, 03:04:37 PM
Empty areas of the flash are usually identifiable by big blocks of "FF". The end of a flash read is the most common area. I was able to decipher the tag because I can work out 8 bit hex values in my head.

Some tuners will lock an ECU to prevent it being read. It looks like yours hasn't. I would say it's highly unlikely that someone has went to the hassle of write protecting the ECU but allows you to read the calibration freely.

As Nyet said, scrap the file and find an original for your ECU and work with that. Use the S4Wiki to gain a basic understanding as to how the ECU works and what you need to change to tune it. The S4Wiki assumes that you have a solid understanding of whats required to tune a car beyond simply increasing boost pressure.
Bootmode.
Most "tuner protection" is just a noread tag ajd regardless anyone can read the file in bootmode
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gman86
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« Reply #7 on: January 03, 2018, 09:46:07 PM »
Quote from: Marty on January 03, 2018, 03:19:56 PM
Bootmode.
Most "tuner protection" is just a noread tag ajd regardless anyone can read the file in bootmode

I know about that, but someone who hasn't worked out the ASCII view mode of WinOLS probably doesn't  Grin
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iborisov
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« Reply #8 on: January 04, 2018, 02:25:26 AM »
Well what I understend from you and google Smiley

There is no possibility to protect your files.

If someone put the NOREAD tag in the file and then write file in the ECU, then some tools will not save the read when they get this, also OLS will refuse to open the file.

But this is a minor protection.
1 .ECU locking don't work in boot mode
2. NOREAD can be found and FF

And as far as I understand it is impossible to do a write protection?

Quote from: nyet on January 03, 2018, 02:14:57 PM
Dont bother trying to decode someone else's file. Just write your own and call it a day.

Quote from: gman86 on January 03, 2018, 03:04:37 PM
As Nyet said, scrap the file and find an original for your ECU and work with that.

Of course I will scrap the file Smiley I just wanted to see what changes were made to this file. Remap was made by one of the top 3 tuning companies in my country. As far as I can see there is a super bad remap. The car is with K04-15 turbo and no PID maps alerted. (Expect wrongly KFLDIMX ). The car overboost all the time...
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nyet
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« Reply #9 on: January 04, 2018, 02:39:28 PM »
Quote from: iborisov on January 04, 2018, 02:25:26 AM
And as far as I understand it is impossible to do a write protection?

For ME7.5 read/write protection is pointless (bootmode)
NOREAD is pointless (anybody with half a brain can override it)
Encryption is pointless (I doubt any hobbiest here can make a file worth protecting for this ancient ECU - I know I can't. I haven't bothered).
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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