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Pacproduct

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  • First Name
    PAC
  • Toyota Model
    Yaris
  • Toyota Year
    2017
  • Location
    Other/Non-UK

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  1. That's a very probable explanation indeed. There one thing that makes me stay skeptical though: I'm pretty sure the car usually consumes fuel when going below a certain speed, but doesn't react this way if the speed is kept above say roughly 50km/h. No sure what the deal with that is, and to be completely honest this would need further testing, but I don't have any downhill long enough without turns at hand to be fully sure because the only 2 roads I take regularly that trigger this behaviour are small mountain roads that keep turning and turning...
  2. I don't doubt that, and I'm sure there is a good reason for the car to behave this way, I'm just curious. I did think it was a problem enough (as a matter of fact, it's probably not an issue at all) to contact Toyota directly. A forum seemed more appropriate for discussing it. If we end up having no certainties for a while, I might do that in the future, thanks for the suggestion. Let me suggest to keep the conversation specifically related to this "mystery behaviour" in the other thread, I'll react to your post there 🙂 Just a question: what does ECU stand for? After a quick search my best guess is "Engine Control Unit"?
  3. Yes I like it, very enjoyable to drive, although unusual at first. Yup I'm actually wondering something that I find weird, and I did ask it in my other post: But it seems that this behaviour is still a mystery for most, so far ^^
  4. Does this mean that when engine breaking, the engine needs some petrol/gasoline time to time to prevent it from taking damage? Never thought of that, that's a possibility. Does that mean that all standard non-hybrid vehicles damage their engine whenever we engine break with them on long downhill slopes?
  5. Once the battery is full (visually on the screen - I get it's only around 80% in reality to go easy on the battery), the car does switch to some kind of a soft "break" mode and does use the ICE as an engine break indeed (and the EV light turns off). When it does that, it does not inject any petrol. However in that mode, time to time, it does inject petrol here and there (visible on the dashboard, as real time consumption jumps up from zero to 2 to 5 l/100km briefly), for no apparent reason, for variable length of time (1 to 10 seconds). Even if I'm not accelerating. Even if the engine is hot. Most of the time when the car is rather going slow (or is it because I just braked?). The result is that on some long descents, the average consumption of the Yaris is not what one would expect (0 l/100km), but a bit more than that (depends on many factors, roughly 1 l/100 I'd say). Don't get me wrong, it's a pretty low consumption for a very specific if not rare situation, overall the car does a decent job at being petrol-efficient 🙂 The rest of the time, it does seem pretty clever I agree. That's why there must be a good reason for the car to use petrol downhill when the battery is full, but so far I did not find any satisfactory explanation 🤔 I'll be honest, I don't really get what this phrase means. Non-native here, sorry ^^'
  6. Hello everyone 🙂 I'm kind of new to Toyota: I have been owning a Hybrid Yaris (from 2017) for a bit more than 1 year now, and I'm pretty pleased with its reliability so far and the comfort of the CVT gearbox. Here to better understand Toyota's specificities, in particular their Hybrid technology. Cheers ^^
  7. Welcome to Toyota Owners Club - Toyota Forum. Please feel free to browse around and get to know the others. Why not introduce yourself in the New Members section.

    1. Pacproduct

      Pacproduct

      Thanks 🙂

      I shall say hi in the new members section ^^

      Cheers.

  8. Hi everyone 🙂 Following an old conversation there: Like some other users, I've been wondering for quite a while why my Hybrid Yaris (from 2017) does use the ICE when the battery is full. I really see no reason why the car would need to start the combustion engine for draining battery power. If that's because the car cannot use the battery anymore for braking, then it could simply break mechanically so I guess that's not it. Typically in my case it only happens when I drive downhill for more than let's say 2km: Once the battery is full, the car regularly starts the ICU for no apparent reason, when speed of the car is too low (roughly below 30km/h), randomly or when hitting the Go pedal... which puzzles me hard: why would the car accelerate with the ICU when the battery is literally at full capacity? Does anyone know what's going on and why the car does that? :) Apart from that, I find the hybrid system pretty clever and does a great job at managing/merging the EV and the ICE. It's just when the battery is full that it really behaves in a strange way... Cheers!
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