TC1767
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« Reply #15 on: January 11, 2015, 03:12:42 AM »
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Ok, still wrong though... Checksum in that file is FBB2, +0x50 is FC02.
What I still dont understand is, my Hex Editor Shows: A0FF -> 50FF = difference -5000 Checksum: B2FB (FBB2) -> FC02 = difference +4907 In my opinion the checksum FC02 is also not ok then as it should be +5000 ? Is there anybody who can help me out with a 100% solution ? |
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cerips
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« Reply #16 on: January 11, 2015, 07:32:43 AM »
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The checksum is stored as lowest byte then highest byte so in the example the checksum CFFB is stored as FB CF.
Back to your case, your checksum is FBB2, adding 50h to this gives FC02 which will need to be stored as lowest byte first so in the file it would be written as 02 FC.
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TC1767
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« Reply #17 on: January 11, 2015, 09:37:39 AM »
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Its still not clear to me as checksum 02FC shows as difference -AFFF in my hex editor in relation the stock checksum, shouldnt it increase and I can see difference +5000 (which matches 0x50) like in all other files done here ?
I think this file is pretty different to all others so its hard to do :-(
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TC1767
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« Reply #18 on: January 12, 2015, 12:43:12 PM »
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Is anybody here able to solve this ? I am also open to pay for it but I really want to have the correct way.
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eliotroyano
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« Reply #19 on: January 12, 2015, 12:55:40 PM »
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Is anybody here able to solve this ? I am also open to pay for it but I really want to have the correct way.
From my little experience many of this Motronic ECUs stores data in little endian format. Then going from A0 to 50 only (minus 50h), you disable Immo, but checksum is stored in the last pair of byte in little endian format. You need to swap it to let understandable, work it and swap it again to store it. Then you only need to add 50h (previously sustracted) to that checksum. Byte at right side of A0 or 50 is not related to this procedure at all. |
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MK2-VRT
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« Reply #20 on: February 01, 2015, 05:12:33 AM »
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Mate write this one and all oke..
No problem..
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TCSTigersClaw
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« Reply #21 on: February 02, 2015, 06:14:52 AM »
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MK2=VRT your file is not ok  A0 value is unchanged anyway , try this and report !  |
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VAG cars newbie tuner |
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MK2-VRT
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« Reply #22 on: February 13, 2015, 04:20:04 AM »
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Thanks for watching, i forgot to change that bite (50), my mistake.
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itsalive13
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« Reply #23 on: March 01, 2015, 05:15:16 PM »
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Did you sort this out? I have done just over 50 AGU ecu immo off. Let me know if you need help.
That picture on previous page showing how to do it is incorrect for what you want.
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TC1767
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« Reply #24 on: March 08, 2015, 01:26:57 AM »
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Did you sort this out? I have done just over 50 AGU ecu immo off. Let me know if you need help.
That picture on previous page showing how to do it is incorrect for what you want.
Hello, I still have issues, car starts and goes off again, ori and mod file attached. Would really apreciate your help. Is the attached file ok ? |
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itsalive13
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« Reply #25 on: March 08, 2015, 07:54:45 AM »
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Looks fine to me. Have you tried that one? Are you sure you have put the chip back on the right way, and all pins are soldered ok?
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TC1767
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« Reply #26 on: March 08, 2015, 09:45:09 AM »
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Yes, I have a stock ECU here to compare, all fitted correctly.
Can this be also an issue of a wrong fitted Am29F200 ? But VCDS can connect to it and MPPS can write a file by OBD so it should be fine.
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itsalive13
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« Reply #27 on: March 08, 2015, 03:22:03 PM »
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Unlikely. Starting then cutting immediately is immobiliser. Touch all 8 pins with a soldering iron. I have had one before that looked fine, but wasn't. Why was the am29f200 removed?
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TC1767
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« Reply #28 on: March 09, 2015, 01:58:53 AM »
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No, I also had this one time when AM29F200 wasnt connected properly, started and was off again.
I was removed from another tuner, dont know why, I flashed back to stock.
Is there any problem when I rewrite the original 24C02 ? Or better to take a new one.
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eliotroyano
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« Reply #29 on: March 09, 2015, 07:33:46 AM »
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AM29F200 can be written several times, to not say many many times. If you have issues with ECU why not make ECU OEM again as a start point (I mean OEM info in flash & serial eeproms) re-check and re-pass solder over those ICs and test ECU on bench.
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