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Replaced ABS Actuator

Discussion in 'Gen 2 Prius Technical Discussion' started by Trub, Nov 29, 2019.

  1. Trub

    Trub New Member

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    Greetings all,

    I have been educating myself in these forums with the many threads on various topics, such a great resource. I recently bought a 2006 with 206k miles and started hearing the brake actuator pump running all the time, then came the C1391 code. I purchased a used pump from eBay and installed it this afternoon. Before jumping into this endeavor, I picked up a mini VCI and hacked version of Techstream and connected it to the car making sure that everything was copacetic a few days before wrenching. I went in to ABS ECU - Utility and verified the menu system was what I was seeing on videos.

    So this afternoon after I had everything reconnected I went in to Techstream - ABS ECU and there wasn't the Utility button I saw before. I read a post where someone downgraded from 12.20 to 12.10 but to no avail. I even went so far as format and reinstall Windows 7 x86 and techstream, nada.

    I'm getting the red triangle, so the car won't start and I'm at a loss for how I should proceed. I barely had any brake fluid loss as I capped the lines and the pedal feels fine, could it be that the "new" ABS pump is bad?

    Any guidance would be greatly appreciated!
     
    #1 Trub, Nov 29, 2019
  2. SFO

    SFO Senior Member

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    Welcome to PriusChat!!
    Quite possibly, as it was a used part.

    What OBD2 codes are you reading?
     
    #2 SFO, Nov 30, 2019
  3. Trub

    Trub New Member

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    I got fed up and took it to a local independent shop and it turns out I didn't completely lock the HV disconnect!
     
    #3 Trub, Dec 2, 2019
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  4. davecook89t

    davecook89t Senior Member

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    Right, I would think whatever you have done with the braking system should have no impact on whether the car will start or not.
     
    #4 davecook89t, Dec 2, 2019
    Trub likes this.
  5. JayRock_PHX

    JayRock_PHX Member

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    when replacing the abs actuator unit the car will start with all the errors but you are supposed to bleed the whole system. And believe me it’s really important unless u want to smash into something. Also it’s a 2 person job unlike normal cars.

    you would be surprised how many people don’t put the hybrid battery disconnect back correctly.
     
    #5 JayRock_PHX, Dec 18, 2019
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  6. Trub

    Trub New Member

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    I didn't bleed the brakes, has been stopping fine for several hundred miles now.
     
    #6 Trub, Dec 19, 2019
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  7. JayRock_PHX

    JayRock_PHX Member

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    I just did a straight swap over without bleeding? That’s very strange. U shud still bleed it. The only way I know a friend of mine (another shop) is to clamp the brake lines closed before removing the actuator etc. but j never tried myself.
     
    #7 JayRock_PHX, Dec 20, 2019
  8. SFO

    SFO Senior Member

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    Personally haven't had a chance to swap out an actuator.

    Could you please inquire with your friend which brake lines require clamping before removing the actuator? o_O
     
    #8 SFO, Dec 21, 2019
    Raytheeagle likes this.
  9. ChapmanF

    ChapmanF Senior Member

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    My experience with steel brake lines is that, once clamped, they don't unclamp very well.
     
    #9 ChapmanF, Dec 21, 2019
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  10. JayRock_PHX

    JayRock_PHX Member

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    I’m not exactly sure what he clamped. I’m assuming brake lines. But I think he meant the lines at the wheels
     
    #10 JayRock_PHX, Dec 22, 2019
  11. ydpplqbd

    ydpplqbd Active Member

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    My experience is that clamping flexible rubber brake lines can cause the interior of the brake lines to crack and peel away from the outer brake hose where the clamp was applied. In this one instance, the brake line pressure would not release when the brake pedal was released. The cracked interior of the brake hose had created a one way valve. Pressure would release but only after waiting extended periods of time. This situation did NOT occurr on a Toyota Prius. Just my two cents ("$0.02").

    PS I would avoid clamping brake hoses. And, obviously never clamp steel brake lines.
     
    #11 ydpplqbd, Dec 25, 2019
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