Cruise Control behavior on 2010?

I don't know why you call it odd - it's the same as my BMW 328

kevin

 

My 2009 Prius cruise control cuts off at 36kph.

IIRC all my previous cars did that, around that speed threshold. Not odd.

 

All OEM cc's work that way. A safety issue. Slow down for car in front of you or a stop light and then resume would accelerate rapidly, some times at full throttle is some cars, and things happen fast. Manufacturers do not want that liability.

 

It's a safety thing - and it's actually quite normal.

Picture this - you're pulling out of the supermarket, creeping along in the firelane at 3 miles per hour. Then you hit the resume button - do you REALLY want the car to accelerate back up to 70mph in this environment?

Dave

 

LOL.. flexing your ankle 1" for a couple of seconds to accelerate to over 25mph is a "royal pain" in the rear!? How does actually walking make you feel back there?

Cheers
Dave

 

:rofl:

 

But I think his point is that even when you are above the threshhold again, the resume doesn't work - you have to reset the speed you want. None of my non Prius cars ever worked this way. They would always resume the preset speed once resume was selected when the car was above the threshhold speed.

 

I understand completely your concern about this. Every car with cruise that I've owned (if I recall correctly) includes this 'speed resume' component. This includes 4 Toyota's including the one I have now.
This alternative behavior by the Prius may be an oversight (doubt that) intentional (huh?...but the only sensible reason) or a blunder (by Japanese?)
Nevertheless something to watch for while operating.

BTW - no need to ** bloody - the censor police would let it pass.

 

No, sorry guys, but the Prius cruise control works -exactly- like the 1990 4Runner's, the 86 Subaru's, AND the 2001 Pathfinder's I've owned. If you go below the threshold it looses the setting. This is deliberate, to protect drivers from themselves. For example, if the cruise takes you off the road (slippery for example or just sleepy) and you drop to a slow speed it stops to protect you.

I know it's a lot of work to accelerate manually back up to speed and press the lever down to set it, BUT...

 

It isn't so much that it's hard work - it's something different. My Hondas "remembers" the set speed. Also, cruise stays on unless manually turned off, even if the car is turned off. I thought something was wrong with the Prius when I first used cruise and it didn't resume after I slowed down below the threshold. I went back up to 45 mph and hit resume. I bet the truck behind me wasn't all that happy either

 

I have one response to this thread and a separate question:

Response: My '07 TCH has a good memory. It remembers the preset CC speed, even after stopping at a stop light / stop sign.

Question: Does Prius 2010 have indicator that shows when CC is in control (working) as well as an indicator for when CC is just powered up?

 

A quick follow up question:

What does the resume button in the Prius do??

Is it just for resuming CC after you've temporarily paused it? Can you pause it, drop below the threshold, speed back up, and press resume? Or will you need to reset it then too? It doesn't seem like a very useful button if the latter is true...

 

You need to reset the cruise speed of a Prius if your speed drops below 40km/h.
It worried me for a few second. now i don't even notice it.

 

Hello Krouebi:

I don't have a 2010, but rather a 2009. However, this week I was traveling for work, and I have to report that the 2009 Prius that I rented DID NOT exhibit the same behavior as your 2007. Nor do I believe that my 2009 does.

Basically, when I had been on the highway with the cruise on, stopping at toll plazas, then accelerating up to speed would indeed restart the cruise at the last set speed, FWIW.


Best wishes,

 

Sorry everyone: I was hastily trying to compose the above reply on my Blackberry while waiting for a plane to finish boarding, so the final result came out really confusing. So I will try to start over.

I own a 2009 Prius. And this week I rented a 2009 Prius while on a business trip. The behavior that I noticed on the rental car I think is exactly the same as on my car:

When driving on the highway today in the rental car, I tested the cruise control "resume" function as follows: I set the control at speed on the highway. When approaching a toll booth, I stepped on the brakes, which shut off the cruise control (of course). After paying the toll, I accelerated normally. When about 5 mph below my previous cruising speed, t stopped accelerating. Then I hit resume on the cruise control. The Prius cruise control then brought the car back up to my previous cruising speed. I tried this a couple of times, with the same result.

So maybe I'm the one misunderstanding something. Or maybe the 2009 behaves differently from some previous model years. But it does seem that the cruise control on the 2009 remembers its previous setpoint.

I assume that my own 2009 works the same exact way. But I'm not going for a ride tonight to check it out! I will however, post back should I notice anything else in the coming days.

I'm a real cruise control freak, also. I even use it on secondary roads. I've never noticed anything weird with the Prius cruise control on my own Prius, except that it can't maintain a really constant speed very well on winding roads (it kind of varies by a few mph). My Chevy minivan, on the other hand, doesn't have a problem with winding roads.

Anyway, FWIW, that's my experience.

 

Hmmm.....I just had another thought: maybe the resume only works if you are within a certain percentage of the last set speed? I'll test this out some time this weekend and report back.