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Old 10-29-2004, 23:01   #1 (permalink)
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Cam angle sensor

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.
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Old 10-30-2004, 02:45   #2 (permalink)
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Re: Cam angle sensor

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.
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Old 10-30-2004, 04:16   #3 (permalink)
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Re: Cam angle sensor

i didnt know efs had a cam angle sensor (vct) or is it a crank angle sensor u mean?
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Old 10-30-2004, 07:13   #4 (permalink)
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Re: Cam angle sensor

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.
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Old 10-31-2004, 01:29   #5 (permalink)
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Re: Cam angle sensor

Remove the plug on the sensor and test resistances.Make sure you get the correct resistances for your car in ohms..
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Old 10-31-2004, 02:14   #6 (permalink)
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Re: Cam angle sensor

Dont know if this helps its from the Gregorys car manual.
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Old 11-01-2004, 01:28   #7 (permalink)
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Re: Cam angle sensor

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
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Old 11-01-2004, 01:45   #8 (permalink)
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Re: Cam angle sensor

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.
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Old 11-01-2004, 02:12   #9 (permalink)
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Re: Cam angle sensor

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.
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