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Author Topic: Adjust speed scale on Audi B6 RB4 cluster  (Read 22048 times)
asg1290
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« on: May 15, 2017, 04:20:39 PM »

I put an S4 cluster in my A4 but want to use the A4 guages.  The A4 guages go up to 160 whereas the S4 go to 170 and my speed is slightly off.  Does anyone know what and where I need to edit in the eeprom to do such a thing?
« Last Edit: May 15, 2017, 05:34:04 PM by asg1290 » Logged
vdubnation
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« Reply #1 on: May 15, 2017, 05:17:36 PM »

Post both e2p and i ll do it.
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asg1290
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« Reply #2 on: May 15, 2017, 05:31:26 PM »

Just give you both encrypted and decrypted dumps?  I can do that when i get home tonight.

Thanks!
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asg1290
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« Reply #3 on: May 16, 2017, 10:14:05 PM »

here you go, sorry it took me a bit. 
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asg1290
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« Reply #4 on: May 20, 2017, 11:09:56 AM »

Here is my old a4 dump if you need that as well.
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Bechersbou
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« Reply #5 on: July 30, 2020, 07:25:49 AM »

I have the same Problem. I got a S4 speedometer disc in my A4 Cluster. Can you teach me how to change it? I have VCDS + VAG Dash CAN

Best Regards,
Nico
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BlackT
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« Reply #6 on: July 30, 2020, 07:49:38 AM »

I have the same Problem. I got a S4 speedometer disc in my A4 Cluster. Can you teach me how to change it? I have VCDS + VAG Dash CAN

Best Regards,
Nico
0x330
A4      A0 10 36 90 60 62 00 00 00 00 31 66 23 10 2A 10
S4      A0 10 36 90 64 73 00 00 00 00 31 66 23 10 2A 10

Try to change in S4 dump this 64 73  to 60 62 like in A4

I NEVER TRYED BUT THAT SCHOULD BE IT, i can try in few days to confirm
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Bechersbou
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« Reply #7 on: July 30, 2020, 08:45:51 AM »

I found this one line 320. Can you confirm it in few days pls? I need to wait for my KKL Cable to test it.
And what i need to change, when i change to RS4? It has 310km/h instead of 280 or 260

Code:
Offset line 330 bit 00:
A0 - Petrol cluster
78 - Diesel cluster

- For 160 MPH and 260 Km/h RB4 Clusters
Offset line 320:
BB 00 77 01 84 67 84 67 00 00 8D 01 7E 40 7E 40 - MPH
BB 00 77 01 40 1F 84 67 00 00 8D 01 08 1C 7E 40 - Km/h

- For 170 MPH and 280 Km/h (S4) RB4 Clusters
Offset line 320:
BB 00 77 01 60 6D 60 6D 00 00 1A 01 80 3F 80 3F - MPH
BB 00 77 01 10 27 54 6F 00 00 71 01 00 20 62 40 - Km/h
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BlackT
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« Reply #8 on: July 30, 2020, 11:25:34 AM »

Don't tink it is 320 line, same cluster with same kmh scale have different values there. And it doesen't goes from lower to higher values like in other clusters.
I will put dump from my S4 and A4 RB4 clusters and try to find some relationship
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Bechersbou
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« Reply #9 on: July 30, 2020, 12:05:27 PM »

Thanks for your trying. can i test it without crashing something?
i save a backup from origonal eeprom
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BlackT
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« Reply #10 on: July 30, 2020, 12:54:01 PM »

maybe it is on 320 offset, give me few days I will try to find something.
maybe macxxx have some idea?
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Bechersbou
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« Reply #11 on: July 30, 2020, 09:48:48 PM »

@macxxx any idea?
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macxxx
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« Reply #12 on: July 30, 2020, 11:40:21 PM »

You are right the line 0x320 is the speedo map , the best way to change it to 310 kmh is to copy the line from rs4 cluster dump but I cannot get such

This part of dump is not covered by checksum or crypted so you can change it without any harm - use vag epprom programeer and read and write in crypted mode ( vag dash can only changes crypted/immo in rb4 clusters area during writing epprom)
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Bechersbou
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« Reply #13 on: July 31, 2020, 02:16:19 AM »

ok, so i can easy change the line with vag eeprom programmer and VAG can commander?
And how i can check if it worked successfully?
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macxxx
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« Reply #14 on: July 31, 2020, 02:20:29 AM »

Read with vag epprom programeer, edit in hex editor and write with vag epprom programeer
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