2015 Prius brake VIDEO noise, bark buzz grind

welcome!

how many miles on her?

 

sounds like the classic 'barking' from the actuator.

 

My 2015 did that a few times, after it sat for a week.

 

Men, I'm surprised to learn that this barking brake problem has extended beyond the gen2s.

I had a hybrid Highlander constantly doing that crab more constantly, say, more than 2minutes, the actuator motor keeps making that hell of a noise. Each time the abs motor relay was removed, it stopped. Replaced same relay, that constant noise, reduced to say, 5seconds. Brakes are perfectly OK now, but you've for the check VSC lights on the dash.

In my case as regards the Highlander hybrid, I suspect the actuator motor is shorting internally. But for the meantime, we're using the brakes that way, pending when we can cough out thousands of $$$ for the actuator replacement.

Yours might be an isolated case.
Have it scanned if there are codes related to the relays.


Dxta

 

Our 2011 with 84k miles is doing it too. I will probably try to get it repaired using our extended warranty before it expires next April.

Posted via the PriusChat mobile app.

 

Hi @xliderider @kyle64 did you guys figure out what was the issue? I have the same sound when braking and sometimes in about a minute after I turn off the car

 

I inquired about the software flash at my last maintenance visit. The service advisor said that because it's a TSB and not a recall, they would charge $140 just to run the diagnostic (connect Techstream?). So I told them to forget about it.

SM-N910V using PriusChat mobile app

 

Did the extended warranty cover the expenses?

 

It's going to be difficult getting it addressed because it's intermittent and there aren't any error codes or warning lights generated when it does it.

Posted via the PriusChat mobile app.

 

I just wanted to drop a note here and let you guys know that my wife's car was "barking like a seal" as it relates to the brakes.

I bled the brakes following the procedure here 2010-2015 or 3rd Generation Prius Brake Flush Video | PriusChat
and it fixed the problem. No more barking brakes. So if you have this problem, do yourself a favor and bleed the brakes before you replace the actuator and save big $$.

 

I've done the bleeding and it fixes the problem for about a month. Then it returns. The fix is to replace the actuator.

 

Well if it returns then I will do a bleed before I trade it in in a couple years. Everything I have read on the subject, it doesn't effect the brakes,, it's just annoying.

 

I got it replaced under warranty, not sure I would do it if I had to pay thousands of dollars to do it.

 

I don't think it would be covered warranty for us. Her CT is a 2012 and has over 100K miles.

 

If I had a Gen 3, and especially if I had a 2010 or 2011 (which I do), I would start by checking the firmware version in Techstream to see if I had the updated version (I didn't), and if not, get it flashed (I did, and drove home from the dealer in quackless serenity).

If I had continuing quacks, and especially if I noticed that bleeding the system made them go away, but then they came back, and no vandals were seen sneaking around my neighborhood pumping air into my brakes, I would seriously consider replacing the accumulator.

The accumulator is where the pressurized nitrogen is. If gas is bled out of the lines, and a month later it's there again, it didn't come from the actuator.

If the car were a Gen 2, the accumulator and actuator would be combined in one assembly, but in a Gen 3, they're not.

 

I had Techstream to assist me. The brakes had never been bled before so I flushed 32 oz of brand new DOT 3 Fluid through the brake lines and master and slave cylinders. The TSB says to flush the system first and if that doesn't fix the problem then replace the actuator. I have my fingers crossed that the actuator is good. It just started doing it recently (barking) the wife didn't notice but I heard it and continued to monitor. It wasn't my imagination, it would occasionally bark. Now it's quiet. Not sure now if it would be the accumulator or the actuator but I wouldn't want to do that myself.