SMT

[lamcote]

Can anyone tell me whether the SMT cars have a throttle cable? I know they have an electronically controlled throttle, I am just wondering what actually controls the system and whether there is a potentiometer on the throttle pedal or is there a cable which runs to the throttle body and operates a potentiometer located somewhere there?

Thanks

[shnazzle]

It's a DBW throttle body I believe. I think that's partially how it has traction control.

[lamcote]

Thanks, I think I am trying to work out where the TPS is located. I reckon it must be on the throttle body because they seem to still have a throttle cable. I had wondered whether the TPS was on the throttle pedal itself and therefore there was no throttle cable.

[shnazzle]

Yeah it is. The tps sits on the opposite side to the controlling side of the butterfly. So, same on both SMT and manual

[lamcote]

Thanks

[mrzwei]

IIRC the pre-facelift SMT was fly by wire but with a cable back up. The post facelift was fly by wire. Time fades the memory so could be wrong.

[SteveJ]

All SMTs had a throttle cable that had command of the first 30% or so of butterfly opening. The remaining travel was restricted by a servo pushing against the requested opening amount to allow rev-matching on shifts.

[SteveJ]

Ps. There was a mod that was popular in the US to prevent the push-back from the servo so all it could do was raise the revs for downshifts but not restrict the opening requested from the throttle pedal / cable. It would have made up shifts clunky though.