Just changed brakes, now they are sticking. HELP!!!!

When you are using Techstream, I doubt there is any need to remove any relays. The bleed procedure in Techstream will control the system and make it do the right things. Fussing with relay removal is something you might do if you're trying to accomplish something without using Techstream. (I don't have a Gen 2 manual in front of me. If it says to remove the relays, then remove the relays, don't listen to me.)

If Techstream was expecting to be able to control the pump and it couldn't because the relays are pulled, I wouldn't be surprised if it reported a failure.

If you try again without any bits of the car missing and it still errors out, it could be related to the J2534 dongle you're using. For a year or so I was using a (surely counterfeit) Mini VCI, and it mostly worked, except it would never give me the engine live data list (it would just immediately say communication failed with vehicle), and the brake bleed procedure it would only complete about one time in six. More recently, I spent a bit more on a domestic J2534 dongle not from a counterfeiter, and I noticed right away it doesn't have the problem with the engine live data. I'd bet that means it doesn't flake out with the brake bleed either, though I haven't tried yet because I don't have any need to bleed the brakes (and I think the process works the accumulator bellows pretty hard, especially if you have to retry it five times).

Other people with cheap Mini VCIs don't report the same issues I was having, so it seems to be more of a quality-control thing than a design defect, but it's worth being aware of if Techstream seems to be having weird communication failures.

I wouldn't guess it's related to Techstream failing, but I would check it out at some point. The vehicle signal check screen should definitely show "brake" turning on and off as you apply and release the parking brake. Does it indicate ignition on/off, reverse on/off, and tail on/off correctly? (I have to assume it is getting the tail signal, or you wouldn't have been able to bring up the screen.)

-Chap

 

Follow the on-screen menu, that Techstream is telling you to do; it is the same as the Toyota manual, but shortened. Bleeding the rear brake lines, the realys stay. Bleeding the front brake lines, Techstream will tell you when to pull the relays. Hopefully you have been pulling the correct relays too.

Spongy, likely = air.

Did you even bother to read this, as encouraged in post #18.: https://priuschat.com/threads/what-services-you-need-and-what-you-dont.28970/

From Galaxee, former PriusChat contributing member, and Toytoa Master Mechanic.
1. brake flush
... the prius has almost 1 gal of brake fluid in it!​

So, how much brake fluid did you discharge?

A few ounces, a pint, a quart?
Consider just buying a gallon or 4 quarts (1 quart/line)?​

Sorry to hear you are having so many issues. Maybe another, but common occurrence of a bad cable, coming out of Panda Land (China). Maybe bad TechStream software?

Consider throwing in the towel and paying for professional help. The mechanic should have the experience and tools to resolve your issues.

 

If you have run 2 quarts of brake fluid through front left then there’s no air in that line. But air anywhere in system will get you spongy brake pedal. Try ty bleed the other parts as well. You can bleed the front wheels without techstream by just pulling the relays and using traditional methods. But to bleed the rear lines, other lines or actuators you do need the techstream.

 

To bleed the front brakes all you need to do is pull the abs motor relays and then use the pressure from accumulator by pressing the brake pedal enough of times until you get the warning buzzer. Brake service You can do the bleeding without turning the Prius on.

But since the Prius has been turned on after the air was introduced into the system there’s a change that air has gone into some other part of the system. And you can’t get the air out by just bleeding that one wheel air has most likely gotten into the other parts of the system and you do need bleed the other parts as well.

 

Any update? Did OP finally solve the issues like sticky brakes?