Pressure bleed brakes with vsc?

Hello everyone, I am planning on changing my brake fluid in my 2010 trd or. I have a mighty vac pressure bleeder and I was curious if it will work the electric brake booster? Does anyone have any experience with pressure bleeding an electric booster? Or do I have to do it by toyotas bleeding procedures?
Thank you guys in advace

 

I think most shops push to bleed and flush. At lest how my pops shop dose it at the MBZ dealer. I have a push pressure bleeder that works grate. He has the same one at work just newer.

I have had mixed luck vac bleeders... get a good seal on the bleeder nipple, so you do not get fake bubbles from air leaking past the nipple. close the bleeder before you lose vac.

I would say your going to be fine. Have a buddy keep and eye on your reservoir. topping it off all the time. If the reservoir goes dry you will suck air in the ABS block and pain to fix!



FYI: the truck has a lot more brake fluid then you may think. if you are going for the full flush have a lot. take back what you do not use. DOT 3 and DOT 4 mix also.

 

I never had luck with the vac bleeder either. Its a mighty vac pressure bleeder and has a gallon capacity of brake fluid in canister, so no need to have to keep an eye on the reservoir. Ill give it a shot, just didnt know if I would encounter an issue with the brake booster motor.

Thank you!

 

what electric brake booster? do you mean the ABS unit? I have a mighty vac it works just fine.

 

Electric brake booster, traditional vehicles have vacuum assist while the or has electric assist. Yes a 2010 trd offroad 4x4

 

go look at your truck and see if there is a vac line running from the engine to the booster

 

Lol ok, Ill still use the pressure bleeder since it will fill the reservoir while I bleed. Thank you guys for the info.

I have this expensive bleeder im trying to get my money out of lol.

 

You cant beat that bleeder

 

Actually the OFF ROAD 4WD since 2009 has a hydraulic brake booster for the A-TRAC system... or is yours 2WD? All others have a vacuum break booster.

 

Yes its a hydraulic brake booster, it is powered by an electric motor. Which is where I get the term electrically assisted.

 

electric brake booster on a compact truck, how I miss the old days. its no reason this crap costs so much

 

You wouldn't be saying that if you had the electric brake booster and expierenced the much better pedal feel and atrac in action.

That stated op. Do it the good ole way. Pressure on pedal, crack bleeder screw, close bleeder release pedal. Repeat!

 

A little tip for you, pull the bleeder valve out and wrap the threads with teflon tape. It will seal the threads so you don't suck air through them and it will help to keep the bleeder from seizing to the wheel cylinder or caliper for next time you have to bleed them. Hope this helps.

 

Hugh I never thought of putting Teflon tape on the treads. I tend to coat mine with fluid film.

I plan on using my pressure bleeder, which would cut down the chance of air getting into the system.

 

Oh ok, when you said you had a Mighty-Vac system I thought it was a vaccum type thats why I suggested the teflon tape to seal the treads. It still works to keep them from seizing.

 

OP, your truck has the hydraulic-type booster and as such has a special procedure for bleeding.

The front two can be bled in the conventional way starting first with the Right Front and then the Left Front. So I would think you could use your mighty vac on the fronts making sure of course that air quits coming out.

But for the rears you are going to have to let the internal pump in the controller do the work. Turn the ignition switch on and starting at the Right Rear wheel hold the brake pedal and slowly open the bleeder plug. The pump motor will run while the pedal is depressed. Do this until no more air is seen in the fluid coming out and then tighten the bleeder. Then move to the Left Rear wheel and do the same.

Make sure that you never let the brake fluid go below the minimum level in the reservoir and take this seriously!!

Now here is the rub. After you have bled the brake lines the procedure says to bleed the brake system. Presumably this means the controller. This language now appears in red type in the TIS procedure so I am making it red here:

"CAUTION: If air is bled without using the the Techstream [Toyota's scan tool], damage or accidents may result. Therefore, always use the techstream when bleeding air."

The procedure then gives instructions for activating the Techstream which activates the internal pump and solenoids and says that it is doing this:

"Air returns to the brake master cylinder reservoir together with the brake fluid and is bled from the brake system."

So I'm reading this as the brake lines can easily be bled as described above but the end part is to bleed the controller. I wonder if in many cases whether this is even necessary or whether some ABS stops might actually do the same? I have a TS so I will follow the factory procedure for the final part.

 

Hmm I dont know, I have never flushed a off roads brake system before. But I imagine those instructions are in reference if you open the hydraulic system. If you never introduced air into the system why would the module need to be bleed?

Im going to give it a go this week with the pressure bleeder since I couldn't find any information at all on it, and it doesn't seem as if anyone who has posted has given it a shot.

Ill let everyone know how it goes, so future searches will find the info needed.

 

I am going to do mine soon and do it both ways and see if there is any difference. I will do the conventional way on the fronts, and then use the ABS pump for the rears as I described. I'll then go play with it for a bit and then do the last part with the TS and see what happens.

 

Just so everyone knows and for future searches.

I was able to successfully bleed the brakes with the pressure bleeder with the key off. Its just like pressure bleeding any other vehicle.

 

This is good to know. I wonder why the factory is trying to make it so difficult as to scare us away?