New To Yaris C.v.t.

[Bemused2]

When at a stop in traffic and in drive, do you always hold it on the foot brake. Or can you use the hand brake. From my experience with multi mode you never held it on the hanbrake as it caused over heating. Instruction manual no help in this respect. Thanks.

[alan333]

You can use either. I think it says in my owners manual to select neutral if you're stopped for a while. I use the footbrake all the time unless stopped for ages.

The cvt is a totally different type of gearbox from the MMT. The MMT is actually a manual gearbox with an automatic clutch, so under certain situations it was riding the clutch itself - a bit like you can do yourself in a manual to stop it rolling back on a hill - hence the overheating.

[Bemused2]

Thanks for that Alan, Very informative.

[mechanic39]

Martin, depending on the time you're standing still;

Longer than 20 seconds = Change into N, Shorter than, you can stay in drive with right foot off throttle, and on foot brake pedal.

Anyway, it's "Old School" instructions / teaching, that with all Automatics whatever, it's better for the oil, and mechanicals, to always change into N , except for stop+go traffic.

A CVT system uses Pully's + metal belts all "dry". So no oil to overheat, no gaskets melting, no sludge causing clogging, no multi-clutch plates wearing, no huge repair bill !

Check the Internet for an explanation of how modern CVT gearbox's work. Then off you go to enjoy your drive !

Best Wishes.

[Cowdenite]

I don't think the hybrid CVT transmission use belts and pulleys. It's an ingenious system of sun and planet gears coupling engine and elect motor to vary the gear ratio. As the previous poster said there are many descriptions on Ytube etc.I used to drive a Volvo that had coned pulleys and belts with a centrifugal clutch, my wife hated it and wouldn't drive it. She loves the Yaris Hybrid CVT as I do.

[Cyker]

That's true for the HSD (Which, as you say, doesn't use a conventional CVT), but there is a 'real' CVT gearbox available for the Yaris which replaced the MMT.

So far it's had glowing reports, but it's still pretty new and hasn't had time to wear in. I'm waiting to see what they're like when they start to get old as ALL CVTs rely on friction and the belt and pulleys are constantly wearing at each other.

As for the braking, my driving instructor liked to say "If a pause becomes a wait, use the handbrake!"

It's a good habit to get into, going neutral and handbrake for a wait longer than a few seconds on any car whether it's manual or automatic as it reduces wear on the drive components and can extend the life of some components. (Well, except with HSDs as it doesn't have a real neutral!).

Of course, 99% of drivers never do this (I'm always amazed if I see even just one person without their brakelight on when waiting in traffic!) so it's probably not a major thing to worry about.

[CPN]

Surely in a Yaris Hybrid, the sensible thing to do for longer waits (level crossings etc) is simply to put the "gear" lever into the "P" position? This makes the handbrake redundant and allows the ICE to switch in if needed while you are waiting (according to the manual, it doesn't if you put the lever into "N")

[Cyker]

Yeah, the N on a HSD is 'faked' and doesn't really do anything useful. (Supposedly there is some rule that cars must have a neutral to disconnect the drive-train from the wheels, which is physically impossible on a HSD, but it still has to have a N due to this law even tho' it doesn't do anything useful).

I can't remember if it's okay to leave a HSD in D-mode with the handbrake on (Is it smart enough to cut power or is it like a torque convertor and tries to push against it?), but IIRC you're right - The best setting for waiting is P-mode :)

For a CVT, MMT or manual Yaris tho', handbrake+neutral is the way to go!

[eyemdee]

My last car was a Fiesta with the "slushmatic" torque converter automatic gearbox and I always left it in drive with the handbrake on at lights etc. It looks like the same advice applies to the HSD.

From the manual:-

Shift the shift lever to D when stopped at a traffic light, or driving in heavy traffic etc. Shift the shift lever to P when parking. When using
the N, there is no positive effect on fuel consumption. In the N, the gasoline engine operates but electricity cannot be generated. Also,
when using the air conditioning system, etc., the hybrid Battery (traction battery) power is consumed.

I have already tried the "N" position and it does feel as though it disconnects the drive to the wheels.

[Wiz201]

I've driven both auto boxes.

MMT I tend to hold on the foot brake unless its going up hill then I apply the handbrake. I don't apply neutral unless I'm waiting at longer road work traffic lights or in a big traffic jam.

CVT similar principle although my Jazz was good at setting off uphill with no roll back.

[MikeSh]

On the MMTif the hand or foot brake is applied and the throttle is at idle the clutch is disconnected.

If both brakes are released the clutch is slightly engaged (creep mode).

If throttle is increased with either brake on, the clutch is partially engaged (to allow hill starts).

I'd expect the CVT to have a similar action, but don't know.

So (for MMT) you can leave it in drive while stopped with a brake on, but I tend not to do this with just the handbrake. If you accidentally touch the throttle the power can easily overcome a lightly applied handbrake which could get embarrassing and expensive.