Cam angle sensor - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

stockstandard · 10-29-2004, 23:01

Does anyone know how to check if the cam angle sensor on an EF is faulty. My workshop manual (haynes) just says its too hard, so take it to a dealer.

useless · 10-30-2004, 02:45

My AU haynes book says......Disconnect the wiring harness from the sensor.Then get an ohmeter and check the resistances.It should be between 800 - 900 ohms.
Stav

needturbo6 · 10-30-2004, 04:16

i didnt know efs had a cam angle sensor (vct) or is it a crank angle sensor u mean?

stockstandard · 10-30-2004, 07:13

Thanks useless. Does it say which pins that resistance is measured between?

Sorry, the proper name for it is a cam position sensor (CMP). All it does is tell the ECU when the engine is on the compression stroke. The problem is that the ECU is not getting a signal from the sensor, and I want to work out if it is the sensor or the loom.

useless · 10-31-2004, 01:29

Remove the plug on the sensor and test resistances.Make sure you get the correct resistances for your car in ohms..

MAD MAX 8 · 10-31-2004, 02:14

Dont know if this helps its from the Gregorys car manual.

INJECTED250 · 11-01-2004, 01:28

this is the sensor , where the dissy usually goes..... i think there r 4 or 5 pins if i remember.... i can find out at work... most likely it will be the sensor

stockstandard · 11-01-2004, 01:45

Yeah, the plug is the same as the coil pack so Im guessing 4 pins (not sure though). I am not sure which pins do what so I dont know where to start testing. I guess it should have a pulse output as the engine spins, so I guess finding voltage, ground, and then pulse would be a start. I assume the pickup is a hall effect sensor so checking its resistance like useless says will have to be done as well. Then I guess I have to check that it is pulsing at the right time, which might be tricky.

The funny thing is that if I unplug the sensor it still runs the same? I dont understand how this can happen because the ECU wont know if the engine is on compression stroke or not. All I can assume is that it takes a good guess all the time, or it fires the injectors and spark plugs on both compression and exhaust strokes.

Hopefully when I get this sorted I can find out how much potential this engine has got.

useless · 11-01-2004, 02:12

I am not to sure but you could get a logic probe tester from dick smith or Jaycar and see if it pulses.Aparently they do not blow computers..Ive been using them for years on modern cars.