2017 cruise intermittent cruise control not working

From your first thread, may I suggest that if the cruise control is now working OK, then perhaps it was beginner's bad luck/inexperience. Don't worry, we have all had to start from scratch at some time, me less than six months ago!

Now, with regard to the B mode setting best advice is to only use it on long steep descents when the propulsion battery is near fully charged. Not for any other intention! You will find that ordinarily when descending a hill and lifting off the accelerator, the electric motor/generator will automatically charge the battery a little. Gently applying the brake pedal increases this recharging just like Formula 1 racing cars to with their KERS (kinetic energy recovery system). You can see this on the energy diagram on the small screen.

The drivers handbook is a boring tome, but it can be worthwhile reading through it. You will begin to understand what a fantastically advanced vehicle you now have. Most on this forum agree that the best way to go is to just drive it like you would normally drive and you'll still get very good mileage per gallon.

Finally, as I should have said at the beginning, welcome to Prius Chat. You are in very good company here.

 

It is also possible that using B erases the set point on the cruise control? Just another guess. Most people here never use B.

 

Welcome to PriusChat.

I agree with other comments - I think nearly nobody uses "B" unless they've got a mountain range to conquer. I don't think it actually puts more "juice" in the battery. Drive will do that just as well. Cruise doesn't work in "B", but I'm not sure if it cancels it?

I've had Cruise cancel quite a few times - but I've been able to just turn it on. I'm certain that I accidentally pushed the button on the stupid stalk trying to find it while it twirls around and around with the wheel. Why TOYOTA doesn't keep it as a fixed position stalk like just about every other manufacturer intrigues and frustrates me. But I think it's a different problem from what you had, because I just push the button again and set it again.

Should it do it again, I'd ask them to put the car on their diagnosis machine to see if any errors were thrown up. Everything being computer linked, it could be anything. I had a pile of MALFUNCTIONS show on my dash soon after I got my car - never happened again, and when they put it on their diagnosis machine, it showed a malfunctioned Brake Light Switch caused them all. Seemed to have only malfunctioned once, 8 months ago - it gets replaced next Monday.

 

Welcome definitely. I missed the fact you are a new user.
Alan, I have got used to Toyota's cruise control switch position. Unfortunate, they have not standardized the position of the light on the dashboard. I still need to hunt for the light on our Tundra whenever I drive it with cruise.

 

Actually guys, here in undulating Cornwall where the roads twist and turn round steep valley sides I find I need to use B mode quite regularly. @Treemendos should note that once the drive battery is fully charged the car will spin up the internal combustion engine to burn off the excess power. This makes a very disconcertingly noisy whine, but no petrol is burned during this process.

 

I still find that amazing. In my gen 2, the battery is often full when going down a hill and the engine is screaming but it uses no gas.

 

As far as I know cruise will not work in B mode. Also, B mode reduces charging, is really only suited for long, steep and relentless downhills, basically mountains.

 

That's right. Energy that could be going into your batteries is being wasted by spinning the engine.

 

Sorry Mike. It only sounds the ICE of the battery is already full!

 

I'm stumped by that.

 

Doh! Bloody auto-corection. Sorry Mendel and everybody else reading my mistakes. do not know what ProdigyPlace will have to say about that.

It only spins the ICE if the battery is fully charged.

 

The cheery thumbs up at the end didn't help your case.

 

Yes, check the settings are on full. But it's just a warning, not self-steering. As far as I can tell, like most cars with Lane Departure Warning, it's designed to wake you should you doze off. It's not Merc/VOLVO/TESLA Lane Guidance/Self Steering.

Letting go of the wheel, from what has been said on PriusChat, will result in a warning to hold the wheel . And if you cross the lane too often, will suggest you stop for a cuppa .

 

With the setting on High, I carried out a few tests on a quiet road and found the steering does gently pull you back to the correct side of the line. However, I would not recommend relying on it for self steering EVER!

 

The only problem is, it only pulls you back after you have crossed the line. On a two way road that could be a head on collision too late or you could have hit the kerb and/or a pedestrian. I can't see the point of it TBH, it's just an annoyance and as Alan says if you cross the line too often without indicating it brings up the sway warning or rest warning, very annoying when you're weaving across the line and back to overtake parked cars, where you normally wouldn't have to indicate.

 

Just turn it off when you don't need it! It's not intended for two way roads IMHO. Just Freeways / Motorways.

The button to enable and disable it is on the steering wheel and easily accessible for a reason.

Posted via the PriusChat mobile app.

 

I bought my 2017 Four on 3/21/17. I had it less than 3 weeks when this first happened to me. I was about half way through a 150 mile trip, was not driving in B, was attempting to set cruise after leaving a small town with max 45 speed zones. I took a short video of it and sent it to my sales guy, who promptly responded “uh...I don’t know. It’s probably just a fluke.” I had to pull over, turn the car off and back on again. I’ll try to find the video I made a post it here.

It’s done something similar a couple of times since then. I will be driving on I40 and the cruise will just shut off. There aren’t any cars within a half mile, not driving into a curve, nothing going on that would cause the DRCC to kick in. It just stops working.

 

What country are you in - your profile is blank. I'm assuming it might be 45MPH speed zones you're referring to.

What speed were you doing? Whether it be C/C or DRCC, as the Manual states, it will drop out below 40km/hr if there is no vehicle in front, and can't engage below 46km/hr if there is no lead vehicle (whatever that is in MPH).