NefMoto > Technical > Reverse Engineering > A4 Instrument cluster modding
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Author Topic: A4 Instrument cluster modding  (Read 26912 times)
hihptsi
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« on: December 10, 2010, 03:14:35 AM »
I am wondering what you guys think about modding the info display in the A4 platform,id imagine this would be modded to work with other clusters as well. I would need to obtain a .bin file first and then dissassemble it. But my ideas are as follows some are dumb ideas some are useful but here it goes.there is2 buttons on the windshield wiper stalk to cycle thru gas mileage,miles to empty etc. above this there is another section that can be used. the down button will cycle only the bottom screen,the top button will cycle the display above. here are my ideas.

*Switchable info via the windshield wiper stalk button, the up button will cycle what info it will display
Customized greeting upon startup.
Wideband display in units of AFR.
boost guage ( must upgrade map sensor and rescale the map in the ecu.)


if anyone has any other ideas please share, and if anyone would like to possibly help please let me know. would like to make this a group projec.t Smiley
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k0mpresd
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« Reply #1 on: December 10, 2010, 08:47:38 AM »
hmm. only problem with this project is it assumes everyones info display is still readable. lol.
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iznogoud
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« Reply #2 on: December 11, 2010, 12:19:07 PM »
Quote from: k0mpresd on December 10, 2010, 08:47:38 AM
hmm. only problem with this project is it assumes everyones info display is still readable. lol.

So true! Only my 2001.5 A4's is readable. The S4 cannot communicate anything to me, sort of like a neurotic girlfriend!
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Audi S4 B5 2000 6sp Cactus Green
Audi A4 B6 Avant 1.8T 2001.5 5sp Santorin Blue
Jason
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Breaks everything!
« Reply #3 on: December 13, 2010, 04:47:07 PM »
I successfully did the ebay LCD swap last week and it was easier than I expected.  You don't need a hot air station either.  Total cost: $65, a beer, and an hour's work.  I need to order some new white LED's to brighten my needles up too.

I would like the ability to display knock activity and fuel trims.
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hihptsi
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« Reply #4 on: December 13, 2010, 05:09:08 PM »
going to need to locate a BIN file for the Cluster.
anyone have one for a B6? if not i mite remove mine when it gets a little warmer out and remove and read the chip.
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k0mpresd
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« Reply #5 on: December 14, 2010, 09:01:04 AM »
i have one for a b5 somewhere. id have to find it.
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iznogoud
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« Reply #6 on: December 14, 2010, 09:17:05 PM »
How does one obtain a bin file form the cluster?
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Audi S4 B5 2000 6sp Cactus Green
Audi A4 B6 Avant 1.8T 2001.5 5sp Santorin Blue
k0mpresd
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« Reply #7 on: December 15, 2010, 09:20:29 PM »
desolder eeprom and read it in a programmer. or i think vagtacho will do it.
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k0mpresd
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« Reply #8 on: December 15, 2010, 09:23:31 PM »
Quote from: k0mpresd on December 14, 2010, 09:01:04 AM
i have one for a b5 somewhere. id have to find it.

here is dump from a 2000my cluster.
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setzi62
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« Reply #9 on: December 19, 2010, 09:29:45 AM »
Is it also possible to read out flash memory (besides the eeprom) of the instrument cluster?
Or does it just have read protected memory embedded in a CPU?
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spen
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« Reply #10 on: March 04, 2011, 07:15:51 AM »
Guys, there is anotherway maybe.  The cluster on my car has a private data link to the sat nav,  there are clock, gnd and data wires.  The data appears to be a priority message followed by a bitmap.

Other cars move the data from the satnav to the display via the infotainment canbus. 

This might be an easier entry point to insert our wideband, boost, cool boot logo etc...
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RaraK
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« Reply #11 on: March 31, 2011, 02:26:38 PM »
Quote from: spen on March 04, 2011, 07:15:51 AM
Guys, there is anotherway maybe.  The cluster on my car has a private data link to the sat nav,  there are clock, gnd and data wires.  The data appears to be a priority message followed by a bitmap.

Other cars move the data from the satnav to the display via the infotainment canbus. 

This might be an easier entry point to insert our wideband, boost, cool boot logo etc...

http://www.youtube.com/watch?v=kPlldPlE17Y&feature=player_embedded#at=193
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smeege
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« Reply #12 on: May 05, 2011, 08:41:34 PM »
Looks like it's time to fix my display! (and play some Snake!) Smiley
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orienz
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« Reply #13 on: May 10, 2011, 02:41:12 PM »
By the way, i found this:

http://cgi.ebay.de/E-MFA-Anzeige-Ladedruck-Oltemperatur-uvm-Tacho-/140546704322?pt=LH_DefaultDomain_77&hash=item20b93c83c2#ht_998wt_1139

Seems to work for MKV only but then I saw this:

http://www.youtube.com/watch?v=Z9lQevuqwG8
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Tony@NefMoto
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2001.5 Audi S4 Stage 3
« Reply #14 on: May 10, 2011, 03:28:40 PM »
Attached is a summary page of B5 Audi instrument cluster pin outs.

Does anyone know off hand which data lines the commands that control the instrument cluster display come on? Is it the CAN bus, K-wire, or Clock/Data/Enable lines?

If I get a chance I will record some data logs with my logic analyzer.
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