I am trying to use the OEM temp sensor on my Porsche 944 but i cannot figure out what i am doing wrong when it comes to calibrating it
Its hooked onto the OEM sensor that goes to the gauge (resistor sensor) to A8/ Adc1.
I get readings in ucomp together the the oem gauge, so far so good.
So now to calibration.
I got the following information:
A quick measurement with ignition off, between A8 and ground confirms these values to be correct.
At approx 90C (guessed from oem gauge) i get around 2,4V reading in ucomp and physical with ignition on.
So i tried to enter the previous values into the calculator
as you can see this wont work, as the voltage values are way off..
Am i missing something here?
For "fun" i tried to just use some random value at R25, and at 9000 / beta 3907 i am getting around 90C at the ucomp.
So the sensor works, from cold to warm engine the temp at ucomp increases, oem gauge still works fine.
However it would be nice to find out what i am doing wrong, if it would be possible to calibrate this with the provided values for the oem sensor?