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Author Topic: P0602/P1681 Control Module Programming Not Finished - Workaround for ME7.1.1/7.5  (Read 9844 times)
maZer.GTi
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Recently we've talked about getting a P1681 fault accompanied by a no-start condition after reading/writing certain files:

http://nefariousmotorsports.com/forum/index.php?topic=981.0

Here's the fix.

Open your file in a hex editor and find the follwing string:

"DB 00 28 02 84 00 ?? ?? C2 F4 ?? ?? 66 F4 80 00 2D"

After finding this, change the last byte from 2D to 0D

Example:

Before:
F4   80   00   2D   0D   E6   F4   F0   A5

After:
F4   80   00   0D   0D   E6   F4   F0   A5

Thanks ddillinger for this cool feature! Smiley

As always, make sure to correct checksums before flashing.
« Last Edit: December 27, 2018, 11:45:45 AM by nyet » Logged
ddillenger
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« Reply #1 on: September 01, 2014, 01:44:02 PM »

A ton of ram logging went into this. Anyone that can use a hex editor can now tune THEIR software without being relegated to switching versions Smiley

Mazer did beastwork here. Thanks go to him Tongue
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maZer.GTi
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« Reply #2 on: September 01, 2014, 02:43:50 PM »

Which versions of ME7 are affected?

I think all ME7 seems to have this, ME7.5 and ME7.1.1 too.
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nyet
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« Reply #3 on: September 01, 2014, 02:47:36 PM »

I think all ME7 seems to have this, ME7.5 and ME7.1.1 too.

Have not seen it in any 2.7t ME7.1, only ME7.1.1 .. can anyone confirm?
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
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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.
maZer.GTi
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« Reply #4 on: September 01, 2014, 03:18:41 PM »

Have not seen it in any 2.7t ME7.1, only ME7.1.1 .. can anyone confirm?

4z7907551S should be a 2.7T Smiley
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k0mpresd
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« Reply #5 on: September 01, 2014, 03:32:46 PM »

anytime i get this code, i just reflash the file and its fine.
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ddillenger
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« Reply #6 on: September 01, 2014, 03:43:58 PM »

anytime i get this code, i just reflash the file and its fine.

When you're doing multiple revisions, that can get more than a little tedious. With this, flash one and done.
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maZer.GTi
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« Reply #7 on: September 01, 2014, 04:02:46 PM »

anytime i get this code, i just reflash the file and its fine.

Have fun with A3 3.2, i can flash 100 times and the code is still present and engine isnt starting.
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SB_GLI
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« Reply #8 on: September 01, 2014, 05:51:57 PM »

I could probably write a little patcher into visual logger when I get a chance.  I have two vehicles that this affects, so good deal for me.  Smiley

So what does this byte that we are changing mean?
« Last Edit: September 01, 2014, 06:06:33 PM by SB_GLI » Logged
nyet
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« Reply #9 on: September 01, 2014, 06:03:17 PM »

4z7907551S should be a 2.7T Smiley

7.1.1 Smiley
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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.
ddillenger
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« Reply #10 on: September 01, 2014, 06:30:04 PM »

7.1.1 Smiley

Code doesn't exist in ME7.1

If you don't have a car newer than 03, just ignore this entirely Smiley
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maZer.GTi
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« Reply #11 on: September 01, 2014, 07:06:35 PM »

The string i posted is to be used in winols 8bit hex search.
« Last Edit: September 02, 2014, 07:33:12 PM by Tony@NefMoto » Logged
ddillenger
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« Reply #12 on: September 01, 2014, 07:08:58 PM »

Yes, the original string with all of the ??'s ensures maximum discrimination against false positives, as well as allows for the best possible compatibility.
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nyet
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I'd say unless you have a SINGLE match, DO NOT MAKE THE CHANGE
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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.
ddillenger
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I'd say unless you have a SINGLE match, DO NOT MAKE THE CHANGE

If you search for the pattern given, you will find ONE match (and only in binaries that have this code, check the DTC table to confirm).

This pattern was derived running it against dozens of binaries, it's as refined as is possible.
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