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Another ABS bleeding issue.

Discussion in 'Gen 3 Prius Technical Discussion' started by Mike72903, Oct 30, 2023.

  1. Mike72903

    Mike72903 Junior Member

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    2009 Prius
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    Four
    I was going to post on erubin2000’s post below about his ABS question but decided it would be better not to. I replaced my ABS actuator on my 2010. The actuator is a used one but seems to be okay in my very limited knowledge. Using Techstream I bled all four brakes with no issues I’m aware of. But when I go to the next step to bleed the actuator itself I get the error “Bleed failed. See repair manual.” Tried several times with the same result. Don’t have a repair manual. Anyone know what the manual has to say about this? Is there a link to an online manual? The brakes seemed to work when I drove it carefully around the block. I’m really frustrated and close to ready to sell it as is. For reference I’m using version 18 of Techstream. My OBD dongle is about 10 years old.
     
    #1 Mike72903, Oct 30, 2023
    Last edited: Oct 30, 2023
  2. Tombukt2

    Tombukt2 Senior Member

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    Base
    So so if you unplug and reboot the car do you have lights and brakes go to the floor or? I've had this happen on a couple of bleed jobs but when I disconnected the dongle and rebooted the car there were no lights on and everything seemed to work great. So I drove the car for a while Said everything was great and left the customer have it they're still driving it.
     
    #2 Tombukt2, Oct 30, 2023
  3. Mike72903

    Mike72903 Junior Member

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    Location:
    Fort Smith, Ar
    Vehicle:
    2009 Prius
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    Four
    Thanks. I disconnected the battery for 10 minutes or so. Took the dongle out. Reconnected the battery and started the car. The dash lights remain on. Brakes seem to work okay. I’m assuming disconnecting the battery is rebooting the car.
     
    #3 Mike72903, Oct 30, 2023
  4. Lakotaed

    Lakotaed Junior Member

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    Vehicle:
    2005 Prius
    Model:
    Two
    My first thought is that your scanner can clear DTCs. But, if after doing a check for codes and you see that the codes are labeled as “current”, then they will not erase because the problem remains.
    My second thought was that maybe you let air into the system while bleeding one of the lines…or the brake fluid is old and has absorbed too much moisture over the years. There are test strips for this. But I’d rather bleed out the old fluid and use my money on just the fluid. And my final thought— I see it so many times on YouTube, people don’t erase the learned memory for the linear calibration before they complete a linear calibration. Why? It tells you to do it on the first page! Don’t forget the yaw calibration too. If you forget, the VSC might remain lit. One last thing, wipe all your joints down, and after calibration and bleeding check for any wetness, the sensors will see those leaks as changes in pressure , i.e., bleed fail
     
    #4 Lakotaed, Nov 9, 2023
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