Hill Start Assist Activating at every stop

I think mine does something similar but not sure.
Even if it DOES, why is that a problem ?

 

mine never does it, unless it's common to the c, i would get it fixed. not sure if it's mechanical or computer.

 

One big potential problem I see here is you assuming that this behavior is because of the "hill hold feature" when it might not be.

The "electric creep" is artificially added to make it "feel" more like a conventional car with automatic transmission.
The basic design means that at a stop on flat ground the ICE would be off and the electric motors would be inactive and the vehicle would not move.
The extra creep is added on purpose.

If you do take it in to have it checked out, tell them the SYMPTOMS only; try to resist also offering them an analysis of why it is happening.

 

how are you relating the creep feature to the car not moving for 2 seconds after releasing the brake?

 

That **IS** the creep feature.

Whenever your foot is off the brake, the car moves slightly......or tries to.

In my C, I'm pretty sure there is no noticeable delay but I'm not sure I would notice it if there was.

If there is a noticeable delay, it could be several things but the most obvious, I think, would be a brake dragging slightly.

 

ya, no delay in any of my pri, so it's probably not normal. i will say, the creep is so aggressive, it can make moving short distances like parallel parking very jerky.

 

yes, i have. i'm just not understanding the relationship. HSA, keeps the car from rolling backwards on a steep hill when you transfer your foot from the brake to the gas. the creep feature moves the car on flat ground when you take your foot off the brake. how are they related?

 

They are NOT......normally.

I think he might be blaming the "hill hold feature" when it is NOT the culprit and the problem instead is with the "electric creep" feature......if indeed there is a problem at all.

Get it now ??

 

i get what you're saying. i don't get how they could be confused, they are completely opposite.

 

Sometimes I approach the diagnosis of mechanical problems, similarly to medical problems.

Long story short, I have family members that are doctors, and for various reasons I would say I have collected more "medical" knowledge than most people on the street. Although I am not a doctor.

Therefore I would agree with the advice concerning giving ONLY the symptoms and withholding any conclusive diagnosis when presenting the vehicle for service. I have to do this myself with both doctors and mechanics.

The risk or danger in not witholding doing so, that I have found is often a mechanic or doctor...is far too ready to accept your diagnosis of the problem. If you're not a mechanic or not a doctor? This can be dangerous. In other words, I always assume I might be wrong, despite any extra knowledge or insight I think I might have to the problem. I let them come to me, and tell me what they think the problem is...

If I disagree with their conclusions? I'll debate it with them at that point.

In this case my pure internet speculation is that the OP obviously has a problem with the "Stop and Start" behavior of his vehicle. This is manifesting with the Traction Control Light being activated, which just could mean a LOT of things. Is it a problem with specifically Hill Start? Is it a problem with the whole system?

I don't know...but I'd want them looking at EVERYTHING it could be...therefore I would not volunteer any opinion that it might only be a problem with Hill Start Assist, although I would offer what it was doing and is doing now, as symptoms of the problem.

 

is the HSA a switch on the brake pedal like the brake lights?

 

the brakes are very grabby on my Prius c at low speed. my HillStartAssist doesnt BEEP and rarely lights the light, but it does engage because when i release the brake it holds the car if i pushed the brakes down hard enough. i think the ECU has different programming on certain c models. it certainly is different from what the manual says.

 

sounds exactly like my pip, and all my pri have had grabby brakes.

 

The brakes are grabby on mine, but the hill assist doesn't engage unless I mash the pedal to the floor for a couple of seconds.

 

same here.

 

I have the same going on with my 2014 prius C

I had a 2012 C that I traded in for the 2014 C

It is very noticeable when I stop on slight inclines. I was used to the 2012 rolling back just slightly,
but the 2014 will not. And I am not activating the hill assist.
It is not causing any problems by my, but it is kinda annoying, as I am not used to yet.

I only parallel parked once, but I didnt notice.
Only time i notice is when stopping on a hill.