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Author Topic: MED9sum: Correct those MED9 eeprom checksums!  (Read 121800 times)
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« Reply #75 on: July 27, 2016, 03:41:47 PM »

Well, minor progress.  Used version 1.1.0 of the program where both flash and eeprom are modified and car now starts.  When using an unpaired key, I still get "safe" displayed in mfd and I am unable to do a throttle body adaptation as errors appear immediately after trying to clear. Got some work to do.
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BraxS4
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« Reply #76 on: July 27, 2016, 04:12:57 PM »

this program would not work for me, if you dig around youll find the two addresses that need -1 and +1 Wink
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stage 3 b5 S4
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« Reply #77 on: July 28, 2016, 12:58:40 AM »

First versions needed both flash and eeprom.

Later versions work with eeprom only on unencrypted eeproms. It's making a simple mathematical operation on a couple of bytes (and checksum of course). Not addition / subtraction.

So, what is the +1 and -1 you are talking about? And on what addresses?

Skickat från min SM-G800F via Tapatalk 2
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BraxS4
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« Reply #78 on: July 28, 2016, 07:49:54 AM »

Keep searching the forum. No you can't replace the whole EPROM but need to hex 4 addresses.
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technic
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« Reply #79 on: July 30, 2016, 01:15:39 AM »

...or you could just tell me what the addresses you are talking about are used for and their function and location - and I'll add it to the tool? Are they in IMMO1 or IMMO2 block for example?

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BraxS4
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« Reply #80 on: July 30, 2016, 06:32:00 AM »

It's two locations in EPROM. Then checksum. The tool would not work for
Me. I'm a b7 9.1 . People don't really like to post immo info on here. I can pm you when I get back on my pc , I can test it on my spare ecu before to verify. If someone knows more than me I'm sure they'll chime in. Basically you -1 two hex addresses.
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stage 3 b5 S4
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« Reply #81 on: July 31, 2016, 06:45:59 AM »

Really hate the super secret handshake stuff.  I found this http://mhhauto.com/Thread-MED9-eeprom-immo-off-checksumm-tool  It describes address locations and possible issues with the tool.  Sad I had to go to another forum to make progress.











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nyet
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« Reply #82 on: July 31, 2016, 10:28:29 AM »

Really hate the super secret handshake stuff.

All it takes is one person willing to gather, organize, and publish.
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

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 experience.
technic
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« Reply #83 on: August 01, 2016, 01:23:51 AM »

The addresses shown on mhhauto is nothing special. It is what V2.1.1 does, including checksum. But it doesn't do +1,-1,+3 or -3.... it does one single math operation that should cover all cases.

However - if someone have discovered a MED9.1 that V2.1.1 doesn't support - but you have a solution - then please post both ori and "your" immo off eeprom - maybe I have a bug or missed something.

I'm aware that on some MED9.1 - which has eeprom encrypted - this tool doesn't work, and I don't have any solution for it.


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BraxS4
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« Reply #84 on: August 02, 2016, 07:07:21 PM »

I use bdm
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stage 3 b5 S4
Carsinc
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« Reply #85 on: August 02, 2016, 09:23:14 PM »

What the hell does that have to do with anything?
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cawadany
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« Reply #86 on: August 02, 2016, 11:09:18 PM »

Edited
« Last Edit: August 02, 2016, 11:10:53 PM by cawadany » Logged
BraxS4
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« Reply #87 on: August 03, 2016, 12:36:24 AM »

"EPROM encrypted this tool dosent  work" aka I use Bdm"  let me know if I am lost also.
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stage 3 b5 S4
BraxS4
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« Reply #88 on: August 03, 2016, 12:37:11 AM »

"Doesn't "
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BraxS4
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« Reply #89 on: August 03, 2016, 12:40:19 AM »

The tool never worked for me. Med9.1 Audi b7
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