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Techstream ABS "Air Bleeding Has Failed"

Discussion in 'Gen 2 Prius Main Forum' started by horn12007, Sep 24, 2022.

  1. horn12007

    horn12007 Junior Member

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    Recently swapped out ABS Module and just got techstream (TS).

    I connect the cable to the car, get everything working and go to the Brake Bleeding ABS. Acknowledge that I replaced the actuator.

    The next step tells you set the parking brake, remove relays and turn the ignition switch back on.
    I do that and get this message:
    "Air Bleeding has failed.
    Verify the initial conditions:
    1. vehicles is stopped.
    2. Parking Brake is applied.
    3. The ignition switch is ON.
    Do you want to try again?"

    I verify all that and try again. Same thing happens. This is the very beginning to start the process.

    Anyone have ideas on how to get the process started?
     
  2. rjparker

    rjparker Tu Humilde Sirviente

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    Might be in Acc or Ready and not in On.
     
  3. horn12007

    horn12007 Junior Member

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    I guess that's always a possibility since I just got the car and don't completely understand it. I thought that pushing the button once was ACC, pushing the button again was IG on and pushing the brake pedal during this time was when you get ready.
     
  4. rjparker

    rjparker Tu Humilde Sirviente

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  5. horn12007

    horn12007 Junior Member

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    Yeah that's where I'm at and no good. Guess I will keep screwing with and try not to throw my computer in anger. I swear there's always something annoying that hangs them up. Maybe I need to reset everything first.
     
  6. rjparker

    rjparker Tu Humilde Sirviente

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    Be sure the cables are connected well. Hopefully it is a new unit, if its used it needs to be the right one and functional. We really don't know what "other hybrid" this is.
     
    #6 rjparker, Sep 24, 2022
    Last edited: Sep 24, 2022
  7. horn12007

    horn12007 Junior Member

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    2008 prius. just picked up.

    Just noticed that all the ECUs are in yellow (ECU Status unknown). Can't get them to be white/ECU communication OK.
     
  8. ChapmanF

    ChapmanF Senior Member

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    Have you pressed the Health Check button yet?

    It doesn't know the status of any ECUs until it has tried to talk to them.
     
  9. horn12007

    horn12007 Junior Member

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    It is not a new unit.
    I thought I did. Just tried to redo that and still getting mostly yellow except a few things on the bottom like air pressure.

    Sometimes I'll get an error box that says "NOTE: REDUCED FUNCTIONALITY. Techstream was unable to access the network. some information may not be available. Features such as campaign validation"

    So I have to be connected to the internet to do all this? I thought the program that I downloaded would do all that.
     
  10. horn12007

    horn12007 Junior Member

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    Messed with it again, Got the ECUs to turn white. Still got the error where it won't let me bleed the brakes. Just says to make sure parking brake is on, ABS Motor relays are removed (I was doing one of the wrong ones before), key on. Done all that and it immediately says "air bleeding has failed". Why does this have to be so frustrating and tedious?
     
  11. Tombukt2

    Tombukt2 Senior Member

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    I just did my '09 with a 14 page something from the factory manual that somebody posted in this same thread that was just going on about a month ago I just did this I don't know 73 days ago maybe maybe a little less and I did not use tec stream. Which I have on a tough book from a dealership right here in my shop I had these instructions I even win my home computer and printed them right from this list and carried them out to the car and it involved or moving the relays to do I don't remember which and then you put them back in and you do the other two and that was it My pedal was hard my lights were off I drove around carefully for a day or two just to make sure made some hard stops. And I've never looked back I didn't even try to bleed with tec because I had heard of others having problems. And then somebody posted this 14 page instruction which I think is field bleeding without tec. I just did it I know it works I just don't know where the instructions got to
     
  12. ChapmanF

    ChapmanF Senior Member

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    It might be worth looking in the Data List to see the status of the parking brake switch, and so on. Maybe the ECU isn't getting the signal that the brake is on.
     
  13. horn12007

    horn12007 Junior Member

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    Makes sense. I was messing around with the parking brake hoping it was something dumb like that. I'll take a look at it tomorrow.

    Also pulled out the battery and charging it just in case.
     
  14. horn12007

    horn12007 Junior Member

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    lol You've mentioned this a few different times lately and can't seem to find anything. lol. Maybe I'll get lucky and find it.
     
  15. Tombukt2

    Tombukt2 Senior Member

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    I'm going to look on my centeral computer see if file I printed is still they're. Nutz. I remember bleed one set regular . Pumping pedal . The other no pumping just open zerk watch till air is gone stream of fluid top up fluid as you crossover to other side . Drive . I've put approx 3K on car since

    This is a service vehicle makes lotsa miles per week and can never be off road more than a few hours EVER. Only 1 Gen 2 here now . I really don't depend on the three's.the other family members go in those.
     
    #15 Tombukt2, Sep 25, 2022
    Last edited by a moderator: Sep 25, 2022
    horn12007 likes this.
  16. horn12007

    horn12007 Junior Member

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    I tried to build the manual way. Did the front likes a normal car (abs relays removed). Got a little air out. Went to the back (relays in). Did the backs. Applied pressure to pedal as normal which activated the abs pump, loosened bleeder and got some air out. ABS just pumping away.

    Brakes work AWESOME. No lights on the dash, but I think that has more to do with me removing the battery before and charging. Drove it around the block a few times just seeing what I can get out of it.

    Will keep screwing with Techstream to see what I can get.

    *Edit - "Brakes work AWESOME" meaning the pressure on the pedal and the stopping ability. The abs noise is still there.
     
    #16 horn12007, Sep 25, 2022
    Last edited: Sep 26, 2022
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  17. horn12007

    horn12007 Junior Member

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    Update - Been doing a few things lately. Put the 12v battery on a trickle charger. Didn't have time (or light) to do the actual process, just wanted to see if I could get through the error code and success!!!! Said something about cracking one of the bleeders and getting to business. Will probably see if I can get to it tomorrow and do the whole process. IDK if the charge on the battery did it, but low batteries cause all kinds of problems. When I do the process, I'll have my other car hooked up.

    Slowly....slowly making progress. Hopefully the module is actually good. Not putting much faith in that
     
  18. ChapmanF

    ChapmanF Senior Member

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    Yes, you should make sure the 12 volt battery is quite fully charged before you begin the bleed process. It will take you a while to complete, the car is in ON mode for that time, nothing is keeping the battery charged, and the long-form bleed wraps up, I think, with about half a dozen complete empty-and-repump accumulator cycles. (At least it does in Gen 3.)

    If you want to remember some cuss words you thought you'd forgotten, just listen for that pump to run slower and slooowwerr and slllloooowwwwerrrr on each of those six cycles and then watch the car shut off on low battery in the middle of the last one, right at the end of the bleed sequence.

    If it's convenient, you can help a bit more by keeping a battery charger connected through the process.
     
    horn12007 likes this.
  19. horn12007

    horn12007 Junior Member

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    Yeah, my battery charger will be another vehicle. I have a cheaper Schumacher charger, but it likes to stop and charge in cycles. I prefer the older manual ones.

    I just didn't expect a slightly low battery to even prevent me from starting, but it isn't a shocker. Should have thought of that. We'll see how it goes. I'm sure I'll run into another issue or 2 or 3.
     
  20. horn12007

    horn12007 Junior Member

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    Success getting TS to work! It did the whole process. Had my other car hooked up to the battery just in case. The process was a little longer than I was thinking. It didn't really seem like any air came out of the lines, but maybe I didn't see it. The last few steps, I thought I saw air go back into the brake fluid reservoir like air was going there? It was just a very quick glance and I didn't see it later. I also wish TS would put more steps in some of the instructions, but I guess they keep it simple for a reason.

    I'll test it out tomorrow. Was getting late. I will be so thrilled if this abs module is good.
     
  21. ChapmanF

    ChapmanF Senior Member

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    By the last few steps, do you mean the ones where it empties and refills the accumulator a bunch of times? Chasing any air from there back into the reservoir is what it's trying to do then.