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Old 03-07-2014, 03:06 AM   #1
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I am a satisfied owner of a 2009 Toyota Auris TR: Just curious, but I understand that there is no direct link between wheel & steering rack, so what happens if the power steering ecu fails whilst you are driving?

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Old 03-13-2014, 06:04 PM   #2
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I understand that it is electrically assisted steering not true hydraulic power steering

If the electric motor failed your steering would just become a bit heavier to operate...but you should still have steering.

I do not think that there are many examples of motor failure.......Just wondered why you are concerned?
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Old 04-26-2014, 07:00 AM   #3
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I think Red is saying you would revert to the old ARMSTRONG system

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Old 05-07-2014, 11:58 PM   #4
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Quote:
I understand that it is electrically assisted steering not true hydraulic power steering

If the electric motor failed your steering would just become a bit heavier to operate...Just wondered why you are concerned?
I saw reference to "fly by wire" when referring to the steering in the Auris which didn t seem to make sense. So it s old school rack & pinion ? but electrically assisted as opposed to hydraulically assisted. That I understand. It was the "fly by wire" that confused me....what happens if the "wire" was cut?

Thanks for the speedy response.
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Old 06-25-2014, 06:40 AM   #5
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Yah, don t worry, it s not true fly-by-wire like you d get on, say, a military jet; The steering wheel is connected to the steering rack as on any other car

AFAIK only the accelerator is a true FBW system, and even then I think that s only on D4Ds?
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Old 07-10-2014, 11:35 AM   #6
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More than one hundred major parts of your car is powered by an electric motor. Why should an electronically assisted steering system bother you (or pedals either)? Why would your steering fail now when your ECU mostly controls your ignition system? Why would someone cut your fly-by-wire steering cable when there is always the option to cut your brake cable? If your ECU was to go , the loss of steering would be the last of your worries.

Electric motors are about as reliable as any motor can get, they ve been powering ignition/dizzy/starter motors, wipers, windows and all sorts of other solenoids throughout the car for almost half a century. It s just a shame they suck at actually powering cars (as in electric vehicles) but that s another story altogether. As SMALL motors go, anything replaced with an electric motor is mostly likely to have improved reliability, power, economy, accuracy and response.

I can t wait until we get electro-magnetic valves on road cars and dump the original clumsy mechanical system we ve put up for, for so long.
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Old 09-25-2014, 05:14 AM   #7
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It wasn t the fact that it was electrically assisted that he was concerned about; He was under the (wrong) impression that the steering was drive-by-wire , which would mean that there was no mechanical link from the steering wheel to the steering rack.

Frankly, I wouldn t want to drive such a car either; Even in planes that have to have it like the Eurofighter, there is at least a quadruple redundancy which is extremely expensive to set up.

But as stated, there is no drive-by-wire, just a normal electric PAS.

Also, electric motors are awesome for powering cars - They are the way of the future!

The problem is powering them; Battery tech sucks donkey balls right now and is over an order of magnitude worse than fossil fuels for energy density; That is quite literally the single thing holding back pure-electric vehicles right now.

I doubt anybody would mind overnight-charging their cars if they had a real-world range of 600+ miles per charge without the battery being size and weight of a small car!
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Old 11-29-2014, 04:59 AM   #8
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Quote:
Why would someone cut your fly-by-wire steering cable when there is always the option to cut your brake cable?
"Just curious, but I understand............." In future I shall try to contain my curiosity.
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Old 11-29-2014, 09:52 PM   #9
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Quote:
Quote:
Why would someone cut your fly-by-wire steering cable when there is always the option to cut your brake cable?
"Just curious, but I understand............." In future I shall try to contain my curiosity.
That would then deprive others, who are not always able to put into words, the answers to the questions that your "curiosity" prompts.

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Old 12-10-2014, 06:14 PM   #10
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Quote:
Also, electric motors are awesome for powering cars - They are the way of the future!
Electric trains seem to do pretty well if you ask me

Could not agree more, like you say, it s battery technology that will be improved in years to come and electric cars will be just fine for most people. It is just the range of a battery driven car that is the issue right now, not a lot else matters

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