4KQ: No power to thermo-time switch after cranking

Ti Kan ti at amb.org
Mon Feb 24 12:25:26 EST 2003


R Mangas writes:
> >The thermo-time switch/cold start valve only gets power during cranking,
> >so that's completely normal.
>
>    Are you sure about this?  IIRC, the implication in the bently is with a
> correctly operating system and cold engine you should get 2-10 seconds of
> voltage at the CS valve after cranking.

The TTS/cold start valve gets its power from the starter solenoid.
Once the cranking stops -- no more power.  Have a look at the Bentley
wiring diagram.

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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