Cable throttle body

[Crazy Butcher]

As the title says, me and one of my friend, we were talking about how i could modify the yarii, He was thinking about putting the cable throttle from a 2000+ 1nz echo, instead of the electronic one we already have.
He's he right? would it make any sens? Wouldnt it make the Ecu go crazy?
Ive tried to find anything on that subject but i didnt find nothing.If it already had been talked about please send me to the thread. Thx guys

[eTiMaGo]

It's been done, 2 cars that I know of (mine and Garm's (aka cali yaris)), but in conjunction with different ECUs. I somehow doubt that you could do it on the stock ECU as there is a feedback system that will most likely throw a CEL...

[cali yaris]

Assuming this project is on a car with a stock ECU -- This means you'd also be replacing the electronic gas pedal, so that signal would no longer be sent to the ECU. Problematic.

But more importantly, this mod wouldn't make any more power. So besides it being a cool idea, what would be the purpose?

[packetrace]

what do you mean Garm...this mod wouldn't make any more power ?

[BEEF]

they are asking about changing from the drive by wire to going to a cable driven. the throttle body is the same (I think)

this is different than converting to the 1zz (or corolla) throttle body.

I think the OP is saying to use the same size (1nz) throttle body.

[packetrace]

What does it add to the car ? It more fun to drive ?

[cali yaris]

It might eliminate the lag from the stock electronic throttle -- I love the cable throttle in my car. But it's a pretty big project for such a small result on a more or less stock car.

A throttle controller like the ones we sell would be plug 'n play and do the same thing.

[packetrace]

It might eliminate the lag from the stock electronic throttle -- I love the cable throttle in my car. But it's a pretty big project for such a small result on a more or less stock car.

A throttle controller like the ones we sell would be plug 'n play and do the same thing.

do you have the link of it ? :)

[Crazy Butcher]

Garm: The main idea was to see what we could do for the "lag" so he told me he had a 2000+ 1nz that was cable throttle and it would be better and Yes garm it was ment to go on my stock ECU.

BEEF: Your right

Is there any write up or any DIY on this, i highly doubt but still worth asking! thx guys for such fast answers!

[Billiam]

The '04-'06 xA uses a cable operated throttle as well.

http://img.photobucket.com/albums/v403/BlkS/IMG_2383.jpg

[CrankyOldMan]

The bigger problem is that the throttle position sensor is different. I think CTScott has done some analysis of the electrical signals on the drive-by-wire (DBW) version but wasn't able to make much progress.

I disassembled a DBW throttle body and wasn't able to make sense of the electronics inside. There's a pair of magnets and a coil that determines open/closed loop operation, and that might also indicate the position of the valve. Beyond that, I can't really say how it works.

[CTScott]

There are two redundant Hall effect sensors in the DBW pedal. Fooling the ECM with that wouldn't be difficult. On the other side the ECM drives the servo on the throttle body based on the pedal signals and looks for the position to match what it is driving. So, replacing all of that with a cable system and adding the necessary electronics to fool the ECM would really not be worth it, as the aftermarket throttle controllers for the DBW do a good job of reducing the lag and are plug and play.

[cali yaris]

Here is the most reasonably priced plug 'n play throttle controller out now.
I have a unit, but the Yaris-specific harness that goes with it is on back order:

http://www.weapon-r.com/products/1967-i-throttle-controller-universal-i-throttle-controller-i-throttle-controller-unit

http://i.ebayimg.com/t/WEAPON-R-I-THROTTLE-CONTROLLER-BOOSTER-BOOST-SELECTABLE-/00/$(KGrHqUOKpYE4lIvEd9MBOSvobt3rw~~0_12.JPG

Blitz also makes one if you want to spend twice as much.

[eTiMaGo]

^definitely a less headache-inducing solution...

CTScott, what if you were to somehow keep the electronic throttle just hanging in free air and somehow still receiving a signal from the pedal? Then it would report *correct* values to the ECU, even though the actual throttle being used is the cabled one? Far too complicated a solution, but probably the only way it would work with the stock ECU!

[CTScott]

^definitely a less headache-inducing solution...

CTScott, what if you were to somehow keep the electronic throttle just hanging in free air and somehow still receiving a signal from the pedal? Then it would report *correct* values to the ECU, even though the actual throttle being used is the cabled one? Far too complicated a solution, but probably the only way it would work with the stock ECU!

The problem though is that the injector pulsing is relative that that, not relative to the position of the mechanical one, so you would still have the same lag.

[tooter]

Here is the most reasonably priced plug 'n play throttle controller out now.
I have a unit, but the Yaris-specific harness that goes with it is on back order:

http://www.weapon-r.com/products/1967-i-throttle-controller-universal-i-throttle-controller-i-throttle-controller-unit

http://i.ebayimg.com/t/WEAPON-R-I-THROTTLE-CONTROLLER-BOOSTER-BOOST-SELECTABLE-/00/$(KGrHqUOKpYE4lIvEd9MBOSvobt3rw~~0_12.JPG

Blitz also makes one if you want to spend twice as much.

Hey Garm, :smile:

I didn't know anything like that even existed. Our 2012 is hypersensitive right at the beginning of the pedal stroke which makes it difficult to modulate the rpms when letting out the clutch to move from a standing start. The tendency is to overrev the engine. While I'm learning to be mindful of this sensitivity, I really miss the linear control of a cable. Would an ithrottle compensate for this?

[cali yaris]

^ Yes, that is exactly the kind of thing it would help with. I'm not sure how many modes it has, but usually there are several available so you can choose the one that enhances your driving style the most. :smile:

[yarisugi]

i-Drive, i-Throttle, 3-Drive, Pivot, Violence - all same type of electronic throttle controllers, just different brands. Sabretooth has a DIY on it - very simple to install. Plug-n-drive :)
Here is the link to the DIY (http://www.yarisworld.com/forums/showthread.php?t=23314) with a full write up.

[JohnnyMalice]

Would It benefit a Automatic in anyway?

[why?]

Yes, it has nothing to do with the transmission, but the signals from the throttle to the ecm. It can help all cars with drive by computer.

[malibuguy]

I thought about doing this too. E-throttles main purpose is for emissions. It eliminates sudden rich conditions that the converter cant clean up. Thats why the down rev is slow and tip in is gradual to make sure what fuel thats being injected is completely being used, resulting in reduced emissions.

I wonder if one could swap xb/xa throttle along with matching ecu could work...?

[CrankyOldMan]

I wonder if one could swap xb/xa throttle along with matching ecu could work...?

I guess that would just depend on what else is managed by the ECU. It would be worthwhile to at least look at the EWD and find out what connections go into/out of the ECU.

[cali yaris]

Different pinouts on the xA and xB. You'd then also have to (1) make a custom harness or (2) hardwire the new ECU into place.

[Crazy Butcher]

Okay guys, Bringing this thread back from the dead, Talked about going the cable throttle way well now i need answers, I was thinking about using a set of 2004-2005 pedals since they were by cable, then i wouldve used the echo's throttle but i was told it may be too small so i got suggested a Celica throttle.i was told that any throttle mod needed to be managed with an standalone unit since the stock ECU wouldnt do it. So know the question is,
How does the standalone works?for the wiring how's it done? do you keep the stock plus the standalone or does the Standalone does it all by herself?

I hope you guys can help me out with this.