Replacing the MFTS

jake falk nullassult at
Fri Apr 4 09:27:12 PDT 2008

how clean are the wires that connect to the MFTS?  I had a problem where I
replaced the old one it worked (thats didn't work) just like before.  My old
one was also leaking.  I pulled it apart and gave it a good cleaning.
Probably could have still used the old one.  Just ask Bernie!

On Fri, Apr 4, 2008 at 11:39 AM, michael <mdearing at> wrote:

> Gentlemen,
> there has been discussion of the MFTS on this list.  It appears
> replacement is not as straightforward as it would seem.
> Coolant leak discovered at MFTS.
> Audi replacement MFTS has 3 terminals instead of the original 4.  The
> +Battery terminal has been eliminated.
> After installing the 3 terminal MFTS, the temperature gauge does not
> work.
> I installed the same 3 terminal MFTS in a 5000 and the temp gauge
> works there.
> The voltages on the wires coming from the mating connector (to the 3-
> terminal MFTS) are as follows.
> 5000:
> 10V      12.5V
> +Bat      10V
> 200tq20v:
> 10V      9.4V
> 0V        10V
> What's causing the difference here?
> The wiring diagram shows one of the wires going to the instrument
> cluster.
> Could this be an artifact of my flaky instrument cluster (which I
> have resoldered, etc. but which still acts up)?
> - Michael
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> 200q20v mailing list

Jake Falk

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