Throttle System? - Toyota Yaris Forums

ExocetCom · 08-16-2007, 04:02 PM

I've been wondering about this but haven't found a concrete answer looking through technical stuff I can find.

Does the Yaris' 1NZ-FE engine use a standard mechanical throttle cable, or a drive-by-wire e-throttle system?

kurokoma-kun · 08-16-2007, 04:03 PM

drive by wire electronic

are you having throttle problems?

nsmitchell · 08-16-2007, 04:17 PM

Yep, and DC motor assist steering! The coolness is all over the place!

ExocetCom · 08-16-2007, 05:50 PM

Ah, so that explains the sluggish throttle response during shifting.

My last car had quite heavy clutch and pedals so it's taking me a bit of getting used to the Yaris' feather-light touch controls.

I'm really not a fan of drive-by-wire systems. Not for safety or redundancy reasons, but more so because I like the control you get with a physical linkage between driver and engine. I don't really enjoy the idea that a computer has to interpret what I'm trying to put in.

Not to mention I find the steering very sloppy and unresponsive, but hey this isn't a track car or anything.

Pavel Olavich · 08-16-2007, 06:20 PM

Quote:

Originally Posted by ExocetCom

Ah, so that explains the sluggish throttle response during shifting.

My last car had quite heavy clutch and pedals so it's taking me a bit of getting used to the Yaris' feather-light touch controls.

I'm really not a fan of drive-by-wire systems. Not for safety or redundancy reasons, but more so because I like the control you get with a physical linkage between driver and engine. I don't really enjoy the idea that a computer has to interpret what I'm trying to put in.

Not to mention I find the steering very sloppy and unresponsive, but hey this isn't a track car or anything.

The reason for the sluggish throttle response has nothing to do with the fly-by-wire gas pedel found in our Yaris. The problem is that Toyota programmed the ECU to be sluggish....think about it...a computer can be programmed to be 100% responsive, but for whatever reason Toyota built it that way. Computers are freakin fast, so don't you think they could decrease the response time if they wanted? Of course.

I do think that the sluggish response is worse for those driving manual transmissions then the automatic cars.

Turbo&Auto · 08-16-2007, 09:33 PM

DBW FTL.....I hate it....

whoguy · 08-16-2007, 09:54 PM

Yep,

Have to agree with PK...... I reckon the delay is due to the speed of the DC motor..... not the computer.

I'm sure the system uses some kind of servo (feedback) system to determine optimum throttle position for any given road condition..... so you don't want to go stuffing around with it too much......

But hey... this is a economy car....

Quatro · 08-16-2007, 10:27 PM

Quote:

Originally Posted by PK198105

did you ever hear about timing delay Mr."Digital is only Numbers"? No computer will ever be 100% responsive (aka instant reaction) unless they mass produce photonic computers (aka a light computer). Each component in a electronic system produces delay.

All these delays combined wouldn't be nearly as long as to be noticeable to a human.
Press a button on a keyboard and watch the letter appear on a screen. Noticed delay? No? At the same a signal had to go through several electronic components to reach the screen.

JosephDoc · 08-16-2007, 11:23 PM

It has electrical throttle peddles just like most of Toyota/Scion/Lexus. I should say... the peddles now acts like your PlayStation joypads.. analog signals on how deep you press on it. That is scary but cool.

cactus22minus1 · 08-17-2007, 05:08 PM

Quote:

ok you're right but how many times does your computer lock up?it happens often

Dude... not trying to gang up on you, but that is a very poor comparison. Personal computers lock up on us all the time, NOT because that is the nature of computers in general. They lock up because personal computers are made by parts from a ton of different manufacturers and are operated by and run software from hundreds of different software developers. Of course such a system is never going to be all that reliable!

The computer in a vehicle is a proprietary system... designed for one task... very different story.

kurokoma-kun · 08-17-2007, 08:10 PM

Here's an old thread with some good info, but no solution...I'm guessing there really isn't one, unless you can reprogram ecu..

http://www.yarisworld.com/forums/sho...t=throttle+lag

08-16-2007, 04:02 PM	#1
ExocetCom View User's Garage Drives: 2007 Toyota Yaris RS Join Date: May 2007 Location: Victoria, BC Canada Posts: 25	Throttle System? I've been wondering about this but haven't found a concrete answer looking through technical stuff I can find. Does the Yaris' 1NZ-FE engine use a standard mechanical throttle cable, or a drive-by-wire e-throttle system?

08-16-2007, 04:03 PM	#2
kurokoma-kun Drives: 2007 Yaris HB Join Date: Apr 2007 Location: my own little world Posts: 1,256	drive by wire electronic are you having throttle problems? __________________ my yaris, kurokoma-kun

08-16-2007, 04:17 PM	#3
nsmitchell View User's Garage Drives: LB-Auto-PWR-ABS-Cruise-Springs Join Date: Aug 2006 Location: Richmond, VA Posts: 1,065	Yep, and DC motor assist steering! The coolness is all over the place! __________________ Other car is a 2005 Mustang Convertible 4.0L V6 Manual - Legend Lime Get YarAss in gear! RIP - Casey Tatum

08-17-2007, 08:10 PM	#11
kurokoma-kun Drives: 2007 Yaris HB Join Date: Apr 2007 Location: my own little world Posts: 1,256	Here's an old thread with some good info, but no solution...I'm guessing there really isn't one, unless you can reprogram ecu.. http://www.yarisworld.com/forums/sho...t=throttle+lag __________________ my yaris, kurokoma-kun

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08-16-2007, 05:50 PM	#4
ExocetCom View User's Garage Drives: 2007 Toyota Yaris RS Join Date: May 2007 Location: Victoria, BC Canada Posts: 25	Ah, so that explains the sluggish throttle response during shifting. My last car had quite heavy clutch and pedals so it's taking me a bit of getting used to the Yaris' feather-light touch controls. I'm really not a fan of drive-by-wire systems. Not for safety or redundancy reasons, but more so because I like the control you get with a physical linkage between driver and engine. I don't really enjoy the idea that a computer has to interpret what I'm trying to put in. Not to mention I find the steering very sloppy and unresponsive, but hey this isn't a track car or anything.

08-16-2007, 09:33 PM	#6
Turbo&Auto Drives: 07 Join Date: May 2007 Location: home Posts: 236	DBW FTL.....I hate it....

08-16-2007, 09:54 PM	#7
whoguy View User's Garage Drives: Yaris YRS Sedan Join Date: Sep 2006 Location: Sydney, Australia Posts: 65	Yep, Have to agree with PK...... I reckon the delay is due to the speed of the DC motor..... not the computer. I'm sure the system uses some kind of servo (feedback) system to determine optimum throttle position for any given road condition..... so you don't want to go stuffing around with it too much...... But hey... this is a economy car....

08-16-2007, 11:23 PM	#9
JosephDoc View User's Garage Drives: 07 Yaris 3D Join Date: May 2007 Location: CA, USA Posts: 264	It has electrical throttle peddles just like most of Toyota/Scion/Lexus. I should say... the peddles now acts like your PlayStation joypads.. analog signals on how deep you press on it. That is scary but cool.