Replaced Brake Actuator - Trouble Bleeding

Discussion in 'Gen 2 Prius Technical Discussion' started by Lukieb, Jan 31, 2025 at 10:36 AM.

  1. Lukieb

    Lukieb New Member

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    Hey all, I'm hoping someone can help me out with this as I've been battling with it for way too long. My daughter's 2005 GEN2 Prius threw the same CXXX codes and was told it was the brake actuator, but the car also needed new bearings and drum brakes, so I gave it a go. I bought a used one and it didn't work, so went ahead and bought a new one. I also had to replace a couple of brake lines since I'm in the North East and the car shows. Anyways, here's a quick rundown of where I am.

    1.) Actuator replaced.
    2.) Put back together, no leaks(anymore). Can hear the actuator working when you open/close door/step on foot.
    3.) I have techstream and attempted to go through the routine, but I'm having issues with the Front Left and Back Right brake lines.
    A.) With relays out, I don't get any fluid coming out of the Front Left. I tried pumping a bunch of times and releasing(at least 40).
    B.) I then went forward to see what would happen with the relays in.

    Results: If I do the 'non scan tool way' - I get a steady stream of fluid in the front left. However, if I go to the back right, I get some fluid and air; but then I hear what sounds like a gurgling sound and almost like it's struggling.

    Any help or guidance would be greatly appreciated as I've already dumped probably 3000 dollars into this between tools and parts. I'm hoping to get this @#*)% car out of my garage.

    Please let me know if you need anymore information to assist. I can hook techstream up and pull any data that's required.
     
  2. Lukieb

    Lukieb New Member

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    I just read you need 5 approved posts. So I'm going to post on this thread 4 times(and remove the clutter once a mod can approve). Here's a few pictures I took while working on the car. Hope this helps the mods know I'm a real person.
     
  3. Lukieb

    Lukieb New Member

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    Drum/bearing
     

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  4. Lukieb

    Lukieb New Member

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    Inverter cable
     

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  5. mr_guy_mann

    mr_guy_mann Senior Member

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    What brake lines did you replace? Any chance a couple lines at the actuator got swapped?

    I would look at brake pressures in Techstream data while pressing on the pedal. Both fronts should change but stay equal left to right under "all" conditions, the rears are lower but similar.

    Pull the relays and recheck. Once the accumulator is discharged, the rears should do nothing, the fronts will be lower than with power assist, but should be even L - R.

    Posted via the PriusChat mobile app.