ABS, (!), and BRAKE symbols on

I would try Hometown Hybrids. They use new parts for $1895 which is considerably less than the dealer. Brake Actuator Failure | Hometown Hybrids

Here is a recent post. 2012 Prius V intermittent brake issue. | PriusChat

 

Often we can help with stuff that doesn't go as expected for some reason. But just as Simon Tatham described in the classic, we're at a disadvantage unless what you post has the key ingredients: 1. what you expected to happen, 2. what you did (in enough detail that we can follow your steps and compare to what we would have done), and 3. what did happen and how it was different from what you expected.

In the case of the jumper Tc-to-CG business, it's especially important to know what you expected to happen, because there must be information sources out there giving people some strange ideas about what it even does.

The same ingredients would be helpful there.

Finding the trouble codes one way or another will help a lot, because those lights can be on for reasons that take five minutes and no money to fix, all the way up to reasons that take $1895 to fix.

The hard braking isn't necessarily a tell-tale symptom, because it can also be a result of the brake ECU changing its behavior because of the codes it's reporting.

Going to a shop and asking what to do, without having the codes, is a good way to be told oh yes, you need the $1895 job.

Especially if you go there and say your research tells you so. The mechanic is likely to nod, compliment your research, and agree to the $1895 job.

 

Haven't watched the videos yet, but yeah, that's an expectation problem that's out there. The jumper did what it's supposed to do: get the lights to blink out the trouble codes. It doesn't clear anything; turning the car back off afterward just makes it, well, stop blinking the codes.

If you counted the blinks and wrote the codes down, we could be on our way to knowing what the trouble is.

 

Watched the videos. The first one just starts with showing how you put the brake system into "Invalid Mode" if you want to (it can be useful for doing work involving the hydraulics); nothing to do with finding out why the system is reporting problems or what to do about them.

The second one does show a method for clearing codes, but of course if you "clear" a code and it's still there, that just means the system wasn't wrong about it to begin with. That's where finding out what the problem is and fixing it comes in.

 

Blinks give two-digit versions. blinky blinky blinky ... blinky blinky ... ... blinky blinky blinky blinky ... blinky ... ... would be 32 and 41. Pattern will keep repeating until you stop it. Different lights will be blinking codes. Keep track of which codes were on which lights, they're in different tables in the repair manual. Many threads on this site if you search.

 

Invalid mode, among other things, allows you to bleed the brakes without Techstream assuming air is not in the actuator. As stated, you can not clear a brake actuator’s ecu code if the problem is still there. You can drive it in a degraded failsafe mode but without power brakes, abs or traction control. You will have very hard brakes and increased stopping distances. I have had an abs sensor problem throwing codes but it don’t cause hard brakes. You can get an OBD2 bluetooth module at an auto supply or online along with an app to read codes and clear them.

 

If you end up needing a brake actuator (eg master cylinder, brake ecu, abs combined) then this ebay listing for $262 is not bad with 59k miles. You would still need the brake booster (hydraulic accumulator) but the prius v specific brake actuator is harder to find. Anti Lock Brake Part Actuator And Pump 47070-12020 Fits 12-17 Toyota Prius V OEM | eBay