ur-quattro 20V diagnostic code procedure

[quk@sievers.com (Phil Payne)]

In reponse to a "cri de coeur" from a list member, I dug out the description of 
dumping the ECU codes on a 20V ur-quattro.
 
AAAARGH!
 
Right.  Assuming you don't want to buy a VAG 1551 (which looks a _neat_ bit of 
kit) there _is_ a documented "Notloesung" - "emergency procedure".  I'm 
prepared to have a crack at translating and ASCII-arting the basics, but it's 
37(!) pages of documentation.
 
Question - it can't be _that_ different from other 20V engines of the same 
period.  Does anyone have a writeup of a 20V code dumping procedure using the 6-
pole diagnostic plug in the driver's footwell, the VAG diode test lamp, and a 
jumper?
 
Also, to make it even more useful, could someone post the instructions for 
making such a diode test probe?  I'm sure I've seen them in an Audi 
publication, or possibly a Bentley.

--
 Phil Payne
 phil@sievers.com
 Committee Member, UK Audi [ur-]quattro Owners Club