3B vs AAN software question

mike claire mike.claire at gmail.com
Sun Sep 23 01:00:07 PDT 2007

I have a '93 S4 with MTM 1+ software and a VMAP.

The S4 will be stored for the winter, and I'll be driving a '91 200q20v.
Does the 3B ECU use the same software as the AAN version?  I know the
pinouts between the 3B and AAN ECUs are different, but I'm not sure why the
software would be different.  I assume there's a VMAP I can but for that


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