1. Attachments are working again! Check out this thread for more details and to report any other bugs.

I’m changing my brake actuator, does anyone have the official guide?

Discussion in 'Gen 3 Prius Technical Discussion' started by BrianStranded, Sep 28, 2023.

  1. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
    2011 Prius w/15 inch wheels. I need to change my brake actuator asap, like today

    Does anyone have the official “how to” guide from Toyota? My brakes just totally gave out and I have to pick up my kids tomorrow, any help would be greatly appreciated.
     
  2. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
    This is for the brake master cylinder, not the accumulator.
     
  3. C-in-DC

    C-in-DC Member

    Joined:
    Jan 14, 2023
    427
    58
    0
    Location:
    Washington D.C.
    Vehicle:
    2010 Prius
    Model:
    Limited
    You need a scan tool or techstream access to bleed it correctly, I did the same install a few months. Will post a link to the thread. I got links to videos..
     
  4. C-in-DC

    C-in-DC Member

    Joined:
    Jan 14, 2023
    427
    58
    0
    Location:
    Washington D.C.
    Vehicle:
    2010 Prius
    Model:
    Limited
  5. C-in-DC

    C-in-DC Member

    Joined:
    Jan 14, 2023
    427
    58
    0
    Location:
    Washington D.C.
    Vehicle:
    2010 Prius
    Model:
    Limited
    in the link I posted @Mendel Leisk provided the service manual procedure.
     
    BrianStranded likes this.
  6. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
  7. C-in-DC

    C-in-DC Member

    Joined:
    Jan 14, 2023
    427
    58
    0
    Location:
    Washington D.C.
    Vehicle:
    2010 Prius
    Model:
    Limited
    You need a good box wrench set to loosen the brake lines and the bleed valves. If you’re going to do it alone you should get the brake bleeding kit that’ll attach to the valve and catch the fluid and have oil pan or something as back up.

    The scan tool capable of doing the brake bleeding procedure will walk you through everything. I had difficulty because mine wouldn’t bleed with my iPhone but it did with my Samsung device. As far as time, not sure.
     
  8. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
    Omg the procedure is 81 pages long
     
  9. Mr. F

    Mr. F Active Member

    Joined:
    Sep 21, 2020
    335
    189
    0
    Location:
    Texas
    Vehicle:
    2010 Prius
    Model:
    IV
    This video may be helpful:
     
    C-in-DC likes this.
  10. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
    Thanks to all…after messing with the pedals the rear brake lights are stuck on. What did I do?
     
  11. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
    Im using this vid now thks!!
     
  12. C-in-DC

    C-in-DC Member

    Joined:
    Jan 14, 2023
    427
    58
    0
    Location:
    Washington D.C.
    Vehicle:
    2010 Prius
    Model:
    Limited
    I had the same problem. There’s a button at the pedal that when you push on the brake the brake lights come on. Your pedal is “too high” or low so it’s engaging the button even when you’re off the brake. There’s a zip tie like connection that you can adjust which allows you to reposition the pedal. I think the new brake actuators are slightly longer or shorter or something.

    @ChapmanF recommended checking to see if the master cylinder is up against the firewall properly. If it’s up against the firewall and you used a new gasket like the manual says, then you can adjust the zip tie like thing. You only got one shot to adjust it right though so I would go little by little checking to see if the brake lights are still on when the brake pedal is depressed. When you get it right it’ll obviously turn the brake lights off. Maybe look for a video or the brake pedal diagram if you can’t find the part I keep calling a zip tie.

    to understand the button I’m talking about, look at your door. It’s got the same concept with a button that is pressed when the door is closed. When your door is open the button isn’t pressed in by the door so your cabin light and convenience light comes on. Hope that makes sense.
     
    #12 C-in-DC, Sep 28, 2023
    Last edited: Sep 28, 2023
  13. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
    i found the button thks. I got it changed now I have 20 abs error codes lol. Im guessing I need a bleed? Im gonna read through your thread again but I dont have techstream to bleed
     
  14. C-in-DC

    C-in-DC Member

    Joined:
    Jan 14, 2023
    427
    58
    0
    Location:
    Washington D.C.
    Vehicle:
    2010 Prius
    Model:
    Limited
    which scan tool do you have?
    I don’t have tech stream either. You need a scan tool that can do the bleeding. If you manually bleed, the car will brake like a regular car but the code will be there and the warning lights will stay on the dash. The new master cylinder will lock with some evil code that can only be removed with the proper bleeding procedure. I don’t recommend driving like that.

    Maybe you can get an advanced scan tool from AutoZone? When you finally do the procedure correctly the noise from the master cylinder bleeding sounds like hearing anakin skywalker take his first breath in the darth Vader mask.
     
  15. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
    I have a blutooth carista scan tool. I still have no brakes so Im guessing brake bleed is necessary. And I have 20 abs codes. This is after changing the actuator. Im bringing to a repair shop now, a scary ride!
     
  16. Mendel Leisk

    Mendel Leisk Patron saint of newly poured sidewalks

    Joined:
    Oct 17, 2010
    54,125
    37,923
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Attached is Toyota's bulletins (primarily for dealership mechanics). The smaller one's intro, the larger the meat-and-potato. It calls for a bunch of "special tools", but I think you can cobble, improvise. Techstream mandatory I think.
     

    Attached Files:

  17. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
    Thanks I sent the pdfs to the mechanic. Ive had enough with the actuator change itself. The beeping is still going and the codes are still there, Im praying a proper bleeding will restore all to a good place
     
    Mendel Leisk likes this.
  18. C-in-DC

    C-in-DC Member

    Joined:
    Jan 14, 2023
    427
    58
    0
    Location:
    Washington D.C.
    Vehicle:
    2010 Prius
    Model:
    Limited
    Did you also install a new booster pump? I swapped mine the year before I changed the brake master cylinder. They work in tandem.

    Tech stream or a capable scan tool is paramount/key/required. I got a thinkdiag Bluetooth scan tool that has brake bleeding as a special function. If yours doesn’t have that capability you can’t do the repair.
     
    #18 C-in-DC, Sep 29, 2023
    Last edited: Sep 29, 2023
  19. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
    Ok so one of the brake lines are squirting fluid out when the brake is pressed, Im thinking the flares arent on correctly from the brake line. Anyone ever experienced this?
     
  20. BrianStranded

    BrianStranded Member

    Joined:
    Apr 26, 2021
    117
    72
    0
    Location:
    New Orleans, LA
    Vehicle:
    2011 Prius
    Model:
    Four
    Turns out the new master cylinder was defective