Audi 100 Trip Odometer and a few other issues

[Nick]

I can only comment on this,   I had a '90 200 TQA for ten years,  i 
would periodically check the voltage thru climate control diagnostics.  
sometimes it would read correct voltage and sometime it would display 
just 12.0     No explanation, no ill results

On 5/9/2017 12:14 AM, Einhorn Hofmann wrote:
> 2.) The automatic climate control has a diagnostic mode whereby you can use
> it to display the result of many sensors, including cabin temperature and
> coolant temperature at different locations.  One of the values that it can
> display is the voltage.  Generally speaking, when in this mode, you can see
> the battery voltage rise to about 13.5 when the car is being driven, and
> drop as low as 10.8 if you turn on enough additional accessories.  It might
> not be the most accurate reading, but its there, and nice to have.
> Recently however when I engage this reading, it just displays 12.0 and
> never changes.  In the past, its always changed quite often depending on
> engine speed and accessory draw.
>