Oxidation/rust of engine parts in 2017 Yaris - Toyota Yaris Forums

dogsridewith · 01-19-2019, 03:33 PM

Is the car rolling during these steering sound tests? Engine on and engine off?
(Might be in a column bushing that is differently loaded in the different test protocols?)

My 1989 Tercel had a clunking column bushing that was much louder in winter cold. (Was happy to finally find it not being a suspension part)

jowii · 01-19-2019, 03:54 PM

Quote:

Originally Posted by dogsridewith

Is the car rolling during these steering sound tests? Engine on and engine off?
(Might be in a column bushing that is differently loaded in the different test protocols?)

My 1989 Tercel had a clunking column bushing that was much louder in winter cold. (Was happy to finally find it not being a suspension part)

It does it when rolling, but the example is while parked and engine is running. It sounds like it's coming right from the column behind the wheel. I know how well sound travels within the Yaris, so I suppose the source might not be immediately located where I'm hearing the sound, but I imagine it has to do with the EPS motor or soemthing in there. Not sure how to get a look at it.

jowii · 01-19-2019, 04:53 PM

I realize at this point that I should have perhaps created a separate thread for this?

Doing more research about EPS, I found this write-up about EPS, but perhaps pertaining more to GM:
https://evwest.com/support/How%20thi...ng%20works.pdf
It says, "Remember though that a slight noise (humming or quiet whine) is a normal operating characteristic."

Who knows if the Toyota would have the same operating characteristics for the same reasons with different parts and assembly, but it at least challenges some of these other articles that say, "Under normal circumstances, no steering wheel makes noise when turning." It would certainly be nice if it didn't!

https://carfromjapan.com/article/car...noise-turning/

I did find this other post by a Toyota owner, perhaps a similar situation (who was assuming something with the motor)...
https://www.cargurus.com/Cars/Discus...37109_ds673149
No follow-up though.

But maybe it's more related to torque sensors which might account for the more direct sound if I'm looking at the diagram correctly? I'm also still reading up on exactly how it works... I understand the principle, but not all the parts yet.

01-19-2019, 03:33 PM	#1
dogsridewith Drives: 2007 2-door hatchback Join Date: Jul 2016 Location: USAnotCA Posts: 750	Yaris electric assist steering noise Is the car rolling during these steering sound tests? Engine on and engine off? (Might be in a column bushing that is differently loaded in the different test protocols?) My 1989 Tercel had a clunking column bushing that was much louder in winter cold. (Was happy to finally find it not being a suspension part)

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01-19-2019, 04:53 PM	#3
jowii Drives: 2017 Yaris Join Date: Jan 2019 Location: Colorado Posts: 42	I realize at this point that I should have perhaps created a separate thread for this? Doing more research about EPS, I found this write-up about EPS, but perhaps pertaining more to GM: https://evwest.com/support/How%20thi...ng%20works.pdf It says, "Remember though that a slight noise (humming or quiet whine) is a normal operating characteristic." Who knows if the Toyota would have the same operating characteristics for the same reasons with different parts and assembly, but it at least challenges some of these other articles that say, "Under normal circumstances, no steering wheel makes noise when turning." It would certainly be nice if it didn't! https://carfromjapan.com/article/car...noise-turning/ I did find this other post by a Toyota owner, perhaps a similar situation (who was assuming something with the motor)... https://www.cargurus.com/Cars/Discus...37109_ds673149 No follow-up though. But maybe it's more related to torque sensors which might account for the more direct sound if I'm looking at the diagram correctly? I'm also still reading up on exactly how it works... I understand the principle, but not all the parts yet.