Testing GM MAF sensor off the vehicle
Is it possible to test a GM MAF sensor that is not connected to a vehicle?
I have one of the 3-wire MAF sensors from a 1996 Monte Carlo 3.1 L and it has a pin for a 12V (+), Ground (-), and Signal (F). I connected the 12V and Ground pins to a 12 volt battery. This sensor is supposed to output a hertz value; however, the multimeter only reads 0 Hz when it is connected between the signal and ground pins. When I switch the multimeter to read resistance, then the resistance value (ohms) outputs a signal that is proportional to the amount of air passing through the sensor.
It makes me wonder if the signal wire has to be connected to the electronic control module where other stuff happens to make the hertz reading.
Thank you. I look forward to hearing your responses.