Here I've got a Ford throttle position sensor that has only three wires. This sensor is hooked up just like the pressure sensor. The difference is that this sensor has a potentiometer inside. Siting with the power on the DMM reads 4.5163v. Turning the position sensor clockwise all the way gives a reading of 0.3800v
I also tested a magnetic pickup sensor. These sensors have a permanent magnetic core inside, with wire rapped around it both ends of the wire sticking out. This sensor doesn't need any power to it. The sensor generates voltages signal through the collapse of a magnetic field created by a moving metal trigger. To test it, all I did was hook the positive lead of the DMM to wire and the negative lead to the other wire. With the DMM reading voltage, I held the sensor close to rapidly spinning piece of metal. The out come was that the DMM read a small amount of volts.