Autocheck protocol

[Ti Kan]

Mark L. Chang writes:
> I know this has been discussed but I can't see that it's gone anywhere.
> Has anyone deduced the autocheck bus protocol in, say, the Type89 cars
> (90q20v is what I've got). Does it use the CAN bus?  It'd be cool to
> integrate stuff into that display. I've got lots of experience with
> microcontrollers and some embedded systems, and would love to help out if
> there is an effort going on.

I don't think the type 89 cars have a CAN bus.  The CAN bus was introduced
in the late 90s on the A4/A6/A8 series cars.  Despite that, the higher level
protocol used for the instrument cluster bitmap display appears to be quite
proprietary.  Otherwise, the chip tuners would have devised a way to
display the turbo boost levels there... (a feature that is sorely missed)

-Ti
01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
-- 
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
  ///    ti at amb.org
 //////  http://www.amb.org/ti/
///