[V6-12v] New A6 with some minor issues and some questions

[Nathan Widmyer]

About the fan speed display, those are easy to fix, I had the same problem
on my '94 90 which is pretty close to your A6Q.  Gently pry off the wood
surround around the digital thermostat, unscrew the unit from the console
and the bulbs are unscrewed out on the sides without disassembling the
unit.  You can get replacement bulbs at Radio Shack and I suggest replacing
all the bulbs at once because it's cheap (if you get bulbs through Radio
Shack) and it'll keep your backlights all at the same brightness so it won't
look uneven.  It only takes like 5 or 10 leisurely minutes to fix it.

As far as exploring the ODB system, check out
http://www.planetfall.com/~jeff/obdii/  They have a RS232 to ISO9141-2 / SAE
J1962 (the name of the diagnostic connector in the car) which it sounds like
just what you're looking for.  I haven't built this or anything so I'm not
vouching for it's usefulness but it came across my browser and thought it
might be useful, I hope it does.

I also get the check engine light too, and I used this
procedure<http://12v.org/maintenance/dtc.php>and it blinked out 2411,
the EGR system code but it's not fixed yet but I'll
get to it one day.

Good luck, Nathan.

On 1/28/06, Rob <beattyr2003 at cox.net> wrote:
>
> So I made the leap from 200 tq to the A6Q.  I love the car, but certainly
> miss the acceleration of the 200.  Have some minor things to work out
> though.
>
>
>
> Car is a 1995 A6 Quattro sedan with manual transmission.  The AC head fan
> speed display light is blown out.  I also am not getting airflow through
> the
> footwell vents.  I haven't run the diagnostics yet, have to read through
> them, and its from an online tech site, not from the factory manual, so it
> takes some reading and re-reading to be sure of what they mean.  It also
> looks like I can diagnose those problems without a Vag 1551, at least I
> think so.
>
>
>
> Also having come from the 200 platform up to the A6, this is my first
> exploration of OBD and OBD II.  I know one needs either the Vag 1551 or
> Vag
> Com or another variant of the software for diagnosing fault codes.  How
> hard
> is it to make the adapter cable for the serial port?  I am skilled in
> electronics and have plenty of experience fabricating cables, I just need
> to
> know what I am connecting to.  Anyone have a pinout of the DB9 (serial
> port)
> connector to the connections for the diagnostics?
>
>
>
> Other issues the car is having is intermittent check engine light under
> partial throttle.  EGR system is suspect, I need to run the test of that
> system and clean it out also, probably its just carbon build up.
>
>
>
> Otherwise, I love the car, and the wife loves her 95 A6 wagon that we
> bought
> about a month earlier, though I'm still jonesing for the S6 instead heh.
>
>
>
> Thanks,
>
>
>
> Rob
>
>
>
>
>
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