I have a problem with NTC sensor again: I installed a third sensor to monitor engine water temperature, connected the sensor white wire to car's chassis and sensor's blue wire to pin B2 Adc3 in Utcomp(the last vcc position available). in the input/output menu I selected NTC3 in the B2 courtain menu, then assigned engine temperature to NTC3 in the NTC calibration page. I entered the same calibration values used for the 2 other sensors(that are perfectly working): R25=47000 B=3800. unfortunately the value displayed on the screen is constantly -273.
I tried to disconnect the signal(blue) wire and reading went from -273 to +300 so it should not be a problem of missing signal. I tried to connect the negative wire(white wire) directly to negative wire in Utcomp instead of using car chassis but nothing changed, so I tried to disconnect the negative wire and the reading did not change(-273). is my problem here a missing negative connection? since I connected the white wire to the car chassis and also directly to Utcomp negative wire I assume it's not the connection that is missing: should I suppose the sensor is not working?