Source: http://www.soarerworld.com/forum/showthread.php?p=155726
These are the values returned by the water temp sensor on the TT (the green one for the ECU not the yellow one for the combination meter). All in degrees Celsius, measured by heating it in a saucepan.
10 C – 3.534 k ohms
16 C – 3.036 k ohms
24 C – 2.120 k ohms
34 C – 1.468 k ohms
40 C – 1.204 k ohms
43 C – 1.040 k ohms
51 C – .796 k ohms
60 C – .588 k ohms
70 C – .441 k ohms
80 C – .315 k ohms