00:00Hard to test a crank position sensor. So crank position sensors sit on a reluctor ring here next to the flywheel and what they do is they count the teeth as it goes round. There's a missing tooth, a reference point, and that's normally piston number one at top dead centre.
00:15An AC voltage sensor like this one creates a little magnetic field because of a coil on the end of it and as the teeth pass through it it generates a voltage or a back voltage to the ECU.
00:25That then gets converted into binary ones and zeros and you'll have a double zero where the missing tooth is so the ECU knows the engines at piston number one at top dead centre.
00:36To test it we're going to put the multimetron voltage AC which is a wiggly one and we're going to test it against something magnetic.
00:44It should generate a voltage between zero and one volts and as this one you can see is generating between 100 and 200 volts of AC which is fine.
00:55We're also going to test the resistance to make sure the wiring inside is complete and we're going to move it to the resistance setting there which is the ohm sign.
01:02The resistance should be between 0 and 2,500 ohms and this is generating 416 ohms resistance.
01:09So this one is fine and ready to go back on the car.
01:12Hope that makes sense.
01:13See you in the next one.
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