[Jad05]

Hi guys, I'm new to this group. And this question has probably been asked 100s of times, my apologies.
Does anyone know what pins on a fps are the ecu feed and reference voltage. On pin 1 I'm getting 1.75v, pin 2 is 0v, so earth. And pin 3 is 5v. This is with the sensor disconnected, testing the loom with koeo.
Thanks