RE: [opendiag] Re: Anyone use the L9637 ISO 9141 Interface chip from ST?

Perhaps I can help. On my 1996 A4, it uses pin 7 as the K line, pin 5 as ground, and pin 16 as V+. The L line isn't used. I don't know if your S4 is different, but on my car pins 1 and 13 aren't used. Are you sure you aren't looking at the plug upside down? Looking down at the plug in my car: (excuse the ascii drawing)

           V+
           16 15 14 13 12 11 10 9
           _______________________
          /O O O O O O O O \
         / \
        / O O O O O O O O \
       /____________________________ \
           8 7 6 5 4 3 2 1
              K Gnd

The adapter in the opendiag web site does work very well on my car. I have used it with both the VAG-Com beta software currently available for download at

http://www.ross-tech.com/vag-com/index.html

and the Baum tools OBD2SCAN v1.2.60 software, which for some reason is available for download on their website at:

http://www.baumtools.com/softupdt.htm

The VAG-COM software is VW/Audi specific, and can talk to the airbag, ABS, AC, and other systems. The Baum software is true OBDII scan software that can show graphs and other real-time data. I think that when the VAG-COM is done, it will also be able to show real-time data.

Hope this helps.

Dale Kirstein


>>> -----Original Message-----
>>> From: blg@erols.com [mailto:blg@erols.com]
>>> Sent: Wednesday, July 26, 2000 12:15 AM
>>> To: opendiag@egroups.com
>>> Subject: [opendiag] Re: Anyone use the L9637 ISO 9141 Interface chip
>>> from ST?
>>>
>>>
>>> Jeff-
>>>
>>> I guess I'm a little confused on this... The car i'm working on is a
>>> 2000 Audi S4. The ODBII connector only has a single ISO 9141 K line
>>> for communication, so I assumed I need to use that line to talk VAG
>>> protocol. I'm I confusing terms here?
>>>
>>> There is an additional set of pins on the OBD connector that may be
>>> what you are talking about. Pins 1 and 13 have pins in them, but I
>>> could never find a pinout on the web that shows these as other than
>>> "discretionary". Are these pins for the VAG interface to which you
>>> are referring?
>>>
>>> This stuff is new to me, so I appreciate your comments.
>>>
>>> Brian
>>>
>>>
>>>
>>>
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Received on Wed Jul 26 09:17:13 2000