?s re VAG-COM Readings

Matt twentyV matt_20v at yahoo.com
Wed Sep 17 08:36:17 EDT 2003


Yes.  I had ch.8 running in 130-140 range, after
changing O2 sensor it is hovering right around
128 as it should.  I also have ch.6 running high.
Bentley suggests air leak but that is not the case,
pressure testing holds air for several minutes.
Ch.9 should also move where it should with the O2
change.  Are you chipped?  I've noticed that with
IA3+ ch.9 runs high, but with stock code it is right
on spec.
After changing the O2 sensor you may want to cycle
the power to the ECU to reset the adaptations.
Matt

--- benswann at comcast.net wrote:
> Thanks Matt, that was it.
>
> Found a few values at the edge or out of range:
>
> Channel   Value   Normal range    Description
>
> 6         132     123-127         ISV load
> adaptation
>
> 8         133-136 123-133         Oxy Sensor Control
>
> 9         51      115-141         Oxy Sensor
> adaptation
>
> Does this sound like I have a failing O2 sensor?
>
> Ben
> > Not individual channel test, you need to go to
> > Basic Measurements, block 000.
> > Matt
> > --- benswann at comcast.net wrote:
> > > This is the first time I have run VAG-COM on my
> '91
> > > 200 20V or any car for that
> > > matter.   I selected individual Channel test
> under
> > > engine control module after
> > > Auto Scan displayed no faults found.
> > >
> > > Many of the channel readings I got with VAG-COM
> were
> > > so far out of range
> > > compared to Bentley Displayed Value range I'm
> > > wondering if they are valid, or
> > > is there some component that would throw al
> these
> > > readings so far out.  I show
> > > a range of the reading I collected.  Two numbers
> are
> > > for a first and second
> > > (repeat) test.
> > >
> > > Here is what the readings were:
> > > Channel     Range     Spec.
> Description/comment
> > > 1           198       184-215    Seems OK for
> the
> > > temp. reading
> > > 2           87-88,104 20-25      can this be a
> valid
> > > reading for engine load?
> > > 3           37        77-83      RPM x 100?  I
> did
> > > not abserve RPM dropping and
> > > the number did not change
> > >
> > > 4           39        121-135    Idle Stabilizer
> > > Operating range - way high
> > > 5           253-254   80-125     ISV Curve zero
> > > point
> > > 6           3-4       123-127    ISV adaptation
> > > 7           11-155    41-55      ISV curve
> control
> > > 8           12        123-133    O2 sensor
> control
> > > 9           193, 197  115-141    O2 sensor
> > > adaptation
> > > 10          93-94,108 8-12 BTDC  Momentary
> Ignition
> > > angle -I know timeing can't
> > > be that far advanced
> > >
> > > Any ideas as to why many of these readings seem
> so
> > > far away from the (ideal)
> > > displayed value range given in the Bentley?
> > >
> > > Also, noticed channel readings for numbers way
> > > beyond 10 - values were mostly
> > > numbers from channels 1-10.  Why is that?
> > >
> > > I'm just geting familiar with Motronic
> diagnostics.
> > >
> > > TIA
> > >
> > > Ben
> > > _______________________________________________
> > > 200q20v mailing list
> > > 200q20v at audifans.com
> > > http://www.audifans.com/mailman/listinfo/200q20v
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Yahoo! SiteBuilder - Free, easy-to-use web site
> design software
> > http://sitebuilder.yahoo.com


__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com



More information about the 200q20v mailing list