GM Coolant sensor

[peter paul fenske]

Hi All

Here is some more sensor data for you guys. Gm used the same sensor
as a coolant sensor, a air temp sensor, and a oil temp sensor.

GM TEMP SENSOR DATA

TEMP(C)   RESISTANCE     VOLTS

100       177            1.29
90        241            1.8
80        332            2.24
70        467            2.6
60        667            3.0
50        973            3.6//1.0
45        1188           1.2
40        1459           1.28
35        1802           1.45
30        2238           1.85
25        2796           2.05
20        3520           2.4
15        4450           2.88
10        5670           3.1
5         7280           3.35
0         9420           3.5
-20       28680          4.4
-40       100700         4.9

The kink in the curve is because GM uses a 348 ohm
pullup above 50 degrees. Below it uses a 348 ohm in
series with a 3.65K resistor as a pullup.

A temp range of -40 to 151 degrees gives a range of 0-255H.

GL: peter