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Recent content by alex111

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    Volvo EC290B engine speed sensor problem

    I tested at EA/EB only today. Am I right thinking I would get to CO01 up by the engine - where it connects to the fuel injector harness? I put my jumper cables into EA30 and EA31 at the EA/EB terminal and then I put my multimeter on them, and that's how I got the 0.92k ohm reading. Is that...
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    Volvo EC290B engine speed sensor problem

    Yeah ive taken the camshaft/flywheel sensor of (and replaced it with a new one too). So happy to hear it was that easy to check for shedding (that went over my head before, I think you already tried telling me that), but definitely no metal fuzz on that magnet. Any other ideas what I might want...
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    Volvo EC290B engine speed sensor problem

    Yeah I did on the camshaft sensor and the new crank one. I saw something tick by on the multimeter (ac volt). So I'm fairly certain those are both good? Both being new and machine does start and run, which I don't think it could without at least one of them being good right?
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    Volvo EC290B engine speed sensor problem

    Yeah, sensors both appear to be good. And I am not seeing any signs of shorts or crossbreed on either pair. Does this indicate my problem is mechanic, ie shedding inside the engine? Anything else you'd check on, apart from opening the engine to look for shedding?
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    Volvo EC290B engine speed sensor problem

    Sorry for the question spam, but looking at the active testing paper you sent me, it does not appear to have tests defined for the two sensors. Those cells are blank. It just says to refer to passive testing in the misc column. Can you advice if I am right thinking there are no applicable active...
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    Volvo EC290B engine speed sensor problem

    Then there is the other paper you sent me which says that ea30-31 should be between 775-945 ohm when (128 sid22 paper). And this would match my sensor, but then I am not understanding where the 3.9k ohm from the passive testing paper fits with that equation.
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    Volvo EC290B engine speed sensor problem

    Update: I tested with a second brand new sensor (just plugged it in and sat on top of engine). It gave me a 0.95k ohm reading (EA30-EA31). So I'm thinking this must be the normal resistance between these connectors after all, and I am misunderstanding something maybe. If the wires ea30 and ea31...
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    Volvo EC290B engine speed sensor problem

    Hi @funwithfuel I have performed the passive testing on the camshaft and the crank sensor, and believe I may have found something. Resistance between both pairs should be 3.9k ohm, per the passive testing paper. My results below: Camshaft, EA7-EA18: 3.57k ohm Crankshaft, EA30-EA31: 0.92k ohm...
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    Volvo EC290B engine speed sensor problem

    Thank you, think I understand. Going to tackle this tomorrow and will report back here after!
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    Volvo EC290B engine speed sensor problem

    Thank you very much funwithfuel. Look forward to working on this this weekend. I understand the difference between active and passive testing. What I don't understand right now is how - without the testing wire harness and breakout box - you can do the testing on specific pins. Isn't the wire...
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    Volvo EC290B engine speed sensor problem

    That would be great, I'll take anything you want to send me. Thank you!
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    Volvo EC290B engine speed sensor problem

    I am just worried that I would connect the wrong poles together and mess something up - or measure the wrong thing -> bad conclusion. CO01.1 and EA30 (going from the diagram you attached above), can you deduce exactly which pins / pinholes in the connectors / ports those identifiers correspond to?
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    Volvo EC290B engine speed sensor problem

    This sounds like a pretty major operation, and probably beyond my capabilities, especially if the camshaft or the follower actually are shedding - this would mean the whole engine has to be stripped down, cleaned and rebuilt, no? The electric stuff I should be able to measure / debug. I would...
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    Volvo EC290B engine speed sensor problem

    Makes sense to me. I am very much a novice mechanic, and appreciate the explanation. I will look for those labels. What do you make of the "128 SID 22 3" error code that happens even after a new sensor has been put in? Do you have any suspicions on what else might be wrong, that would trigger...
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    Volvo EC290B engine speed sensor problem

    First of all let me say I was wrong in my initial post: the sensor that is hard to get to is not the one by the flywheel. It is still the one that is quite hard to get to on the front of the D7D engine though. Now, you say the sensor that is by the flywheel (on the back of the engine, easy to...
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