replacing a power lock actuator motor in a gen i prius

Discussion in 'Generation 1 Prius Discussion' started by Sonarcade, Dec 12, 2009.

  1. DRACO

    DRACO Member

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    Make sure you get a warranty, if Pick your Part ( LKQ ) they will sell you warranty, get it, just in case the donor car's is broken or bring a Digital Volt Meter with your to check the continuity on pins 3 & 4, a 12v source would be good but PITA to carry around unless it is a RC one.

    The convenient part of going to Pick your Part, you can go online to check the car inventory. More than 10 days old, it is probably stripped. I got lucky twice. I went once and found a rear actuator, after fixing it, MIL told me passenger side was broken too, went back a week later car was gone. Last week checked inventory, another was junked, found it :D
     
  2. ChapmanF

    ChapmanF Senior Member

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    The things it's most important to test for kind of depend on the source of the part.

    The pin3 to pin4 test is important if you are buying one of the brand new, eBay Chinese knockoffs, because they frequently seem to be missing the internal part that makes that switch work. Just plain missing it, as in built wrong. Otherwise, they are brand new and their motors are good.

    If you are pulling used parts off an old car, chances are you're getting the real thing, and your pin3/4 test is not super important, because chances are it wasn't built with parts missing. On other hand, with a used pull part you'd be smart to test the minimum current you can feed into the motor to get it through a full cycle, because it probably has an old gasping motor, like the one you want to replace.

    I find a new motor will make a (not brisk, but complete) cycle if I touch it with a constant-current supply limited to about an amp and a quarter. An old tired motor may either need a good deal more current than that before it moves much, or will actually not draw any current even at full voltage. (Sometimes that changes if you smack it right, and change how the commutator is lined up.)

    -Chap
     
  3. DRACO

    DRACO Member

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    Thank you Dr Chapman :)
     
  4. DRACO

    DRACO Member

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    Update:

    MIL's car's alarm started to have a ghost, it was locking and unlocking on it's own.

    I removed the Knock Off actuator, installed the donor actuator, it cleared it right up. Geez, what a nightmare.
     
  5. KrauseP

    KrauseP New Member

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    I went to the salvage yard and there were 4 Gen1 Prii, 2 of which had the actuators present. I removed the driver's side actuator from one (feeling that I should have also grabbed the other as well). With the unknown age of the donor Prius, I know that I am probably delaying the inevitable and will have to replace it in the future. The donor actuator works fine - without the alarm problems.

    I was able to return the defective actuator to ebay seller TomAutoParts (the ebay price was $15.20 with free shipping) and, to their credit, they refunded the whole purchase amount (paying return shipping for me).
     
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  6. 3prongpaul

    3prongpaul Hybrid Shop Owner, worked on 100's of Prius's

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    Be careful of used actuators, a lot of Gen1's have bad/tired actuators by now.
    If you open your "broken" actuator and replace the electric motor with a new one that should fix it.

    I have replaced dozens of motors in gen1 actuators and never had one fail.
    Better to put in a new motor in your existing actuator than a 15 year old used actuator.
     
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  7. DRACO

    DRACO Member

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    Any tips or tricks you want to share? I have a used one and a new knock off I want to gut the motor.
     
  8. ChapmanF

    ChapmanF Senior Member

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    Hmm, I'm trying to keep that project straight ... was this the passenger or the driver side that you replaced when this happened? When did she notice the locking/unlocking on its own? Right as she was walking away after locking/unlocking it, or at other times when no one had been near it for a while?

    Do you still have the Knock Off actuator?

    -Chap

    ps. also, if you keep the knock-off to open it up for the motor, you could also take a picture of the LSW switch (or the area where the LSW switch is supposed to be inside), like the picture I had in that earlier post. That way we would know whether the sinoauto problem is really the same (switch completely missing) as the one I took apart (which was from a different seller), or if the details of the defect are somehow different.
     
  9. KrauseP

    KrauseP New Member

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    I second the request for tips/tricks on motor replacement.
     
  10. ChapmanF

    ChapmanF Senior Member

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    This is me testing whether the broken image upthread in #17 can now be fixed by just uploading it here:

    -- I can upload it, but there's no insert-thumbnail or insert-image button - I would have inserted it here --

    So I guess that's better than nothing; you can click the attachment link below and see it in your browser, but it still doesn't seem quite 'supported' in xenforo the way png or jpg are.
     

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    #50 ChapmanF, Jan 4, 2020
    Last edited: Jan 4, 2020
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