some crank angle sensors have three wires, two for the sense coil, and one to power an electromagnet (i presume).
others have their own permanent magnet, and two wires, one for each end of the coil. some confusion may arise due to a third wire
for shielded cable.
My question is this. In the case of 1.3 Opel cdti diesels (combo etc) equipped with Magnetti Marelli ECU's, is the crank angle sensor two wire with a shield, or three wire nesecitating power and selective connection of the scope to the other two, or what? Does the answer change for the latest versions?
For Fiat multijets with fiat powertrain technologies ECU, same question.