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Author Topic: 3B0 920 949/MK4 Needle Sweep  (Read 20161 times)
adam-
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« on: July 24, 2017, 05:07:17 AM »

Someone has just uploaded a video of a MK4 cluster performing a needle sweep on startup.  The comments seem to reveal that it's a Passat board with over 200 bits changed in the EEPROM.

Now, does anyone know what's been changed, or have a copy of said EEPROM?
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KasperH
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« Reply #1 on: July 24, 2017, 09:30:42 AM »

Link to video?  Grin
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adam-
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« Reply #2 on: July 24, 2017, 03:23:08 PM »

https://www.youtube.com/watch?v=2bPcrHnFDW4

I now have it stage round, but it doesn't return.
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vwaudiguy
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« Reply #3 on: July 24, 2017, 09:30:05 PM »

You can do this with VCDS to test the needle sweep. Maybe that could clue us in.
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vwaudiguy
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« Reply #4 on: July 24, 2017, 09:35:43 PM »

 Posted 27 January 2010 - 04:46 PM

Graeme, I have tracked the guy down his name is Svenni from R32club.de but I cannot register to ask him how complicated the module is to build.

His username is Bisheep on r32club.de.

There was also some talk about a square wave generator tapped into the signal feed to the cluster, triggered with ign on
« Last Edit: July 24, 2017, 09:42:47 PM by vwaudiguy » Logged

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vwaudiguy
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« Reply #5 on: July 24, 2017, 09:54:09 PM »


https://www.youtube.com/watch?v=AK3YjiQZwZE
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adam-
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« Reply #6 on: July 24, 2017, 11:30:18 PM »

I've got it to sweep round but it stays at the max position.  I'm going to try a Passat flash. 

People are saying they're "injecting custom code" but that's not a thing in an EEPROM that size.

ALSO: Why are people being so secretive?  It's a MK4 Golf ffs. 
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megadoc
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« Reply #7 on: August 12, 2017, 10:15:23 AM »

the info was made public today..enjoy
http://www.users.on.net/~graeme86/sweep501/sweep501.html
http://www.users.on.net/~graeme86/sweep503/sweep503.html
« Last Edit: August 13, 2017, 02:19:21 PM by megadoc » Logged
H2Deetoo
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« Reply #8 on: August 14, 2017, 04:49:22 AM »

Very interesting that these clusters allow a "code patch" residing in eeprom area.
Does anyone know if newer types of clusters like VDO NEC (PQ) support such feature also?


Rgs H2Deetoo
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adam-
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« Reply #9 on: August 14, 2017, 05:03:28 AM »

I implemented this the other day and it works.

I want to know HOW it works though, but that doesn't seem to be an option.

I read through the datasheet but nothing really stuck out.
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vwaudiguy
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« Reply #10 on: August 14, 2017, 09:32:16 AM »

Awesome
« Last Edit: August 14, 2017, 09:37:52 AM by vwaudiguy » Logged

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macxxx
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« Reply #11 on: August 14, 2017, 02:50:47 PM »

adam- do you have any datasheet for micronas used in the clusters?
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H2Deetoo
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« Reply #12 on: August 15, 2017, 04:00:25 AM »

Isn't it just simply some assembler code block?
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adam-
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« Reply #13 on: August 15, 2017, 04:21:43 AM »

I don't think so.

The EEPROM just contains settings AFAIK.
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fknbrkn
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mk4 1.8T AUM


« Reply #14 on: August 15, 2017, 08:04:59 AM »

I don't think so.

The EEPROM just contains settings AFAIK.

seems that there is some call to the code inside eeprom  Undecided
post datasheet pls
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