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Cam Position Sensor issue
After much research I beleive the reason my '92 is not starting is a bad cam position sensor. The CEL code is #12 but I have reason not to beleive it. I pulled the sensor out with no change in symptoms. The wiring has been spliced and I was wondering if anyone knew how to check to make sure the sensor is bad and not the wiring before I shell out two bills on a new one.
Thanks in advance. Roy |
#2
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Re: Cam Position Sensor issue
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I guess you mean the code was a 13? as 12 is for the starter circuit. The cam sensor is not too easy to check, the book gives no resistance readings for it. You could check to see if the windings are open circuited, or shorted. Or you could check the output at cranking speed with a meter set to a low AC reading. It should show 0.1VAC at least. These sensors have a magnet in them that can weaken with age to reduce the output. I would suggest you try a replacement. The Legacy sensor is the same. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#3
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Re: Cam Position Sensor issue
i had that code come up on one of my libertys once but it turned out that the fuel pump relay was dodgey but if you crank them too long it sets that code so make sure youve got fuel pressure or try squirting some into the manifold and cranking it then if it fires you have a solution
cam |
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Re: Cam Position Sensor issue
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Part #22630AA041 $27.77 list, 19.99 plus shipping from 1stsubau.com Big thanks to Hocrest for this find.
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#5
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Re: Cam Position Sensor issue
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Tom |
#6
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Re: Cam Position Sensor issue
Message deleted as not applicable.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! Last edited by Trevor; 06-25-2008 at 11:50 PM. Reason: Typo |
#7
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Re: Cam Position Sensor issue
Apologies for the old thread bump, but this is the first one I found that clearly involved the Cam Position Sensor.
I borrowed this diagram from Suby Fan: It's the test for the cam sensor. I don't remember which way I had it wired (which was ground, and which was signal) but I don't know if it mattered. What interested me was the test method, which was kind of vague. I didn't give it a full-on Hall Effect, just a proximity test, which isn't the way it's treated in the car. After testing the new sensor with the same methods, I found out that it didn't matter. TEST: The old sensor showed a subtle wave without metal near, and it only left that when something was in contact with it... metal, magnet, ...even just my hand. The new sensor showed a flat wave without metal near, and it went crazy with metal or magnet within four to five inches, even stationary. From my experience, you really shouldn't have to wave a high-powered magnet within an eighth of an inch to get the sensor to notice. It can also be said that, as obscure as they are, there's probably someone in your circles who has an oscilloscope. Needless to say, my three-weeks-dormant SVX is ready for the race on Sunday.
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Disclaimer: The above post is on the internet. |
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Re: Cam Position Sensor issue
Using a magnet to test the sensor, really defeats the test. There is a magnet in the sensor, and that is the one that you must test, as it can become weaker with age and temperature.
If you connect a meter, set at a low voltage AC range, between the wires the polarity does not matter. Then move a metal object across the face of the sensor it should show a reading that becomes larger, the faster, you move the metal across it. The book doesn't give any resistance readings for the winding, just that it should read at least 0.1V Ac minim, when cranking the engine over. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
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