Yaris mk4 engine noises.

[dash]

Any different when the aircon is switched off?

[coreye9090]

im pretty sure that's the aircon.... mine does the same lol

[JonnyXDA]

2 minutes ago, coreye9090 said:

im pretty sure that's the aircon.... mine does the same lol

10 minutes ago, dash said:

Any different when the aircon is switched off?

 

No different when the aircon is off - and in anycase I wouldn't expect this to affect the ability to switch back into EV mode when easing off the throttle with a Battery level of 4-5 bars

[hind]

Something related to GPF cleaning maybe? 

[TonyHSD]

The engine is running to produce electricity. Little bit higher rpm

[JonnyXDA]

6 minutes ago, TonyHSD said:

The engine is running to produce electricity. Little bit higher rpm

If I discharge the Battery by idling and running aircon, the engine coming on to recharge the Battery is significantly quieter than that - I'm talking at least 3x in sound. Additionally that sound for charging the engine is a much lower rumble pitch, this is a higher pitch

[JonnyXDA]

10 minutes ago, hind said:

Something related to GPF cleaning maybe? 

I saw mention of GPF potentially being a cause in another thread. Is this something I could clean myself or would booking it in at the dealers be the best approach?

[TonyHSD]

4 minutes ago, JonnyXDA said:

If I discharge the battery by idling and running aircon, the engine coming on to recharge the battery is significantly quieter than that - I'm talking at least 3x in sound. Additionally that sound for charging the engine is a much lower rumble pitch, this is a higher pitch

So when you were recording  the video what was the Battery state of charge high or low? 
Because engine can sound different when charging or discharging the Battery. To me sounds ok

[JonnyXDA]

1 minute ago, TonyHSD said:

So when you were recording  the video what was the battery state of charge high or low? 
Because engine can sound different when charging or discharging the battery. To me sounds ok

Medium SoC - it was being kept roughly at 4-5 bars so enough that the engine won't have had to kick in just to charge the Battery. Another thing I noticed is that when this particular noise happens, even though the left pod won't display the EV sign, the head unit will display power only from the Battery to transmission - the head unit thinks the engine is off/not providing power to the transmission yet the pod seems to be aware the engine is on and making noise.

[MikeSh]

19 minutes ago, JonnyXDA said:

the head unit thinks the engine is off/not providing power to the transmission yet the pod seems to be aware the engine is on and making noise.

Those are different displays. The pod is saying the engine is running (not EV mode) but the head unit says it's not providing electrical power, which is perfectly possible. As mentioned GPF, heating/aircon or other things may cause this to happen.

Whether this occurring is actually a fault is another matter, so don't get side-tracked by the displays.

[PeteChat]

I am a new Yaris Cross owner and initially found the sound of the engine first cutting in so alarming I took the car straight back to the dealer!

I have previously had a Mk1 Yaris and a 3 cyl Suzuki Swift, but this engine sounded more like a diesel cement mixer - even my old 350 single motorcycle is quieter 😳

The technician at the dealers said it sounded normal to him ( they all sound like that sir 🙄) and couldn’t do anything without a fault code anyway! I have to admit it has quietened down now it’s got a thousand miles on the clock.

This is my first hybrid and also my first automatic so it is taking some getting used to (as is its tendency to brake randomly all by itself 😡)

Very economical though 👍

[MikeSh]

2 hours ago, PeteChat said:

tendency to brake randomly all by itself

That's kinda mandated by law these days. Part of the transition to self-driving vehicles I suspect.

[anchorman]

7 hours ago, PeteChat said:

I am a new Yaris Cross owner and initially found the sound of the engine first cutting in so alarming I took the car straight back to the dealer!

I have previously had a Mk1 Yaris and a 3 cyl Suzuki Swift, but this engine sounded more like a diesel cement mixer - even my old 350 single motorcycle is quieter 😳

The technician at the dealers said it sounded normal to him ( they all sound like that sir 🙄) and couldn’t do anything without a fault code anyway! I have to admit it has quietened down now it’s got a thousand miles on the clock.

This is my first hybrid and also my first automatic so it is taking some getting used to (as is its tendency to brake randomly all by itself 😡)

Very economical though 👍

You can stop it braking by turning off the proactive driving assist.   It’s one of the few things that will stay off if you don’t want it but I’ve grown to like it as it’s an extra pair of eyes.  Up to you though, turn it off if you don’t like it.  

[Cyker]

You kinda have to let it do its thing - Coming from a normal car, the hybrids do all sorts of weird stuff for no apparent reason, but I assume they're just taking care of themselves so I mostly just let it get on with it.

I find the more you drive it the less it does it - Mine really doesn't like it when I only take it on short runs and spend most of that in barely moving traffic, but is much happier when it's moving.

 

The best way to reduce the automatic emergency brake triggering is to leave a bigger gap and be more progressive on acceleration; I think when the majority of cars have this system a lot of people are going to have trouble as the vast majority of drivers follow the car in front too closely and it freaks out the AEB.

 

[jthspace]

1 hour ago, Cyker said:

The best way to reduce the automatic emergency brake triggering is to leave a bigger gap and be more progressive on acceleration; I think when the majority of cars have this system a lot of people are going to have trouble as the vast majority of drivers follow the car in front too closely and it freaks out the AEB.

 

On any road @ + 30mph I try and use the 3 second rule - and get cars pulling into the gap after overtaking - annoying but not uncommon these days. 30mph and under on country roads, 2 seconds.  Won't work in built up areas though!

[TonyHSD]

Yeah, 

most of the complains about strange noises and behaviour of these cars been as a result of expectations vs reality by a new to hybrid owners. 
I have people saying, lol these cars are noises when engine is running, or noooo, to slow, push them and on.y noise , no speed up and tons of similar. 
Give it a time to get used to them, learn about hybrid magic and you will love them.  ⛽️🔋

[JonnyXDA]

I've booked it in just to be safe.  I've had a 1.0L Aygo and 1.3L Yaris before this so I'm no stranger to loud engine noises, this particular noise is above even the Aygo when pushed on the motorway, by at least 2x - as I said pedestrians were turning around to stare, I have a family member with the same MK4 model so it's not normal being this loud - first thing I did was to check with them, best to get it checked out.

[hind]

I've noticed something like you describe yesterday when I was crawling slowly in the traffic jam. When the car decided to recharge, the engine noise was (as usual) pretty loud, but when I pressed the accelerator a little, it got quieter. Something contrary to expectation, but I guess that's how it works - maybe tries to minimize the time when the ICE is running when the vehicle is stationary by revving it to the range of optimal recharge but accelerating switches it to drive mode and only the excessive power is used for charging? A/C compressor is also loud, especially when the car is heated up after being parked in the sun and the sound can bounce of the nearby building. 

[Cyker]

I find the engine is particularly obnoxious when it is charging, esp. when the car isn't moving - You really feel the lack of a balancer shaft then! - and this happens a lot more on days like this when the AC is working hard and sucking loads of power out of the high voltage system.

It's partly why I will tend to take longer routes that avoid traffic as you end up with better mpg and sometimes even lower fuel use despite going further!

[TDG]

On 5/12/2022 at 1:50 PM, fourbanks said:

Most dealers i know in my 50 years of driving know nothing. I've yet to come across a mechanic who understands cars other than the basics, and in reality this type of forum is far better to understand what goes on with the vast majority of troubleshooting 

The sales staff can't be ubikd with the detailed technical stuff 'cos, for them, it's just  a financial transaction.