Climate Control - Diagnostics Code

["Enis, Robert O" <roenis@tva.gov>]

Fellow listers:  I followed the advice posted recently to run diagnostics on
the climate control system of my 1989 200tq.  While the car is running I
held down the outside temp button and then pressed and released the off
button.  The cc then displayed the number '09'.  Pushing the warmer button
caused the system to sequentially display numbers from 01 thru 21, which I
take to be just the channel number to indicate no diagnostics code is
contained.  So, if I understand this correctly my cc has 21 channels and
displays one diagnostics code of '09'.  Can someone with the Bentley manual
confirm (1) that 21 possible diagnostic channels is correct for a 1989 200tq
(thought some recent poster indicated the system should have 23 channels)
and (2) what does a diagnostics code of '09' indicate?  

BTW, if someone has an archived posting of the climate control codes I would
really appreciate the entire list.  I receive the list at work and really
can't take the time to throughly search the archives.

Many thanks.  This list is such a wonderful resource!!!

Bob Enis
Knoxville, TN
1989 200tq
1990 100