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Author Topic: Could Use some help with US C5 A6 cluster  (Read 9447 times)
vmoses
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« Reply #15 on: December 19, 2017, 12:26:18 PM »

I swapped an '03 Allroad cluster into my "01 A6.  I thought I could  just change the soft coding to tell the cluster that it wasn't in an Allroad (change coding from 06264 to 02264) but  it's locked somehow.  VCDS couldn't do it and neither could a dealer, so I was stuck with a lot of speedometer error (larger tires and different differential), under reporting by about 5 mph at 60.  I was just trying to fix that.
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macxxx
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« Reply #16 on: December 19, 2017, 12:29:31 PM »

But there should be no diffrences beetween allroad cluster so i guess something was wrong with IT  

The coding has nothing to do with speedo
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vmoses
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« Reply #17 on: December 19, 2017, 12:48:04 PM »

I just went back and looked at the revised coding I posted.  It still isn't right.  Not sure what I was smoking when I did all this.  I'll post a corrected version later today.
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vmoses
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« Reply #18 on: December 19, 2017, 10:04:44 PM »

Okay, here's the third version.  Never actually tried to load, just getting ready for when I get to the point I can do it.

Original bin:

0xB0    FC   86   07   D0   07   23   10   3A   10   23   10   3A   10   F6   0E   22
0xC0    0F   01   01   08   18   00   80   00   04   03   0B   07   F9   09   CD   0D
0xD0    9A   10   11   11   03   00   78   00   C1   02   68   06   26   09   CD   0C
0xE0    8A   0F   00   10   08   00   00   20   03   40   06   60   09   80   0C   A0

Modified bin:

0xB0    48   86   07   D0   07   23   10   3A   10   23   10   3A   10   F6   0E   22
0xC0    0F   01   01   08   18   00   80   00   04   03   0B   07   F9   09   CD   0D
0xD0    9A   10   11   11   0D   00   78   00   EB   02   F1   06   DB   09   94  0D
0xE0    4B   10   B2   10   08   00   00   20   03   40   06   60   09   80   0C   A0

Interestingly, the original bin map isn't that much different than my old cluster, which
prompts me to think there's a scaler buried somewhere in the cluster bin file.  I just don't know where.
I decided just to ignore it and adjust the speedo map to compensate.
 
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