of VAG-COM and 200q20v's (part one)

[Ti Kan]

Peter Berrevoets writes:
> This URL shows a connector for the older Audis. He also indicates that you
> can make a connector but that he doesn't want to deal with home-made
> connectors that don't work. He therefore doesn't make a schematic available.
> 
> Does the PC need to be isolated from the car or what are the hazards of
> connecting directly to the serial port?
> 
> http://www.ross-tech.com/vag-com/2x2.html

You cannot connect the car's diag port directly to the computer's serial
port.  Doing so would do damage.  The voltage levels and other stuff are
apparently not compatible.  That is the reason for the electronics in
Ross-Tech's interface kit.

-Ti
01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
96 A4 2.8 quattro (sold but not forgotten)
-- 
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
  ///    ti at amb.org
 //////  http://www.ibiblio.org/tkan/
///