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Registered
Join Date: Mar 2019
Location: Saarland, Germany
Posts: 1,254
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I think I have to add that these tests / measurements are applicable on the old pure electromechanic version of the TTS incorporating a bimetallic strip and heater element. Porsche / Bosch redesigned them some years ago as a pure electronic version. There is from a catalog available from 2017 mentioning this, available here:
https://www.bosch-classic.com/de/media/pdfs/downloads/mini_kataloge/sensoren_1/thermozeitschalter_f026t0310x_2017.pdf
The original Porsche version is not listed there. Guessing Porsche denied. The only difference I guess are the round contacts for Faston plugs in 6.3mm and 8mm diameter.
This electronic version IMO cannot be diagnosed with simple tests with a multimeter. Instead you need to build a test stand similar to the car to get it tested properly.
Here are some pictures from the internals of the old version and an excerpt from Haynes manual added with my comments in german on the contacts:
Thomas
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1981 911 SC Coupé, platinum met. (former tin (zinc) metallic), Bilstein shocks, 915/61,930/16,WebCam20/21, Dansk 92.502SD,123ignition distributor with Permatune box as amplifier,Seine Systems Gate Shift Kit,Momo Prototipo. Want to get in touch with former owners of the car. Last registration in US was in 2013 in Lincolnshire/lL.
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