I checked my test sensor and got 1.75 kOhm from A (VREF) to B (signal return/sensor ground), and 1.81 from A to C (ICP signal). I tested a truck I'm working on and got 1.52 kOhm from A to B, and 1.85 from A to C.

Back probe the dark blue/green ICP signal wir... Login to read more.