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TD42 Throttle position switch.
Posted: Sun Feb 17, 2008 3:33 am
by Hobbz
What is it ? and most important .... Where is it and what does it do ?
Posted: Sun Feb 17, 2008 4:04 pm
by gq banger
What model patrol are you talking about. On GQ patrols the TPS was only fitted to automatic TD42s & was used to enable gear changes. On GU patrols it was only there for to be used as an input in the basic emmission system that was fitted to get them complied in australia. It is fitted on the injector pump on top of the throttle linkage
Terry
Posted: Sun Feb 17, 2008 4:24 pm
by KIWI
gq banger wrote:What model patrol are you talking about. On GQ patrols the TPS was only fitted to automatic TD42s & was used to enable gear changes. On GU patrols it was only there for to be used as an input in the basic emmission system that was fitted to get them complied in australia. It is fitted on the injector pump on top of the throttle linkage
Terry
My manual GQ Safari had one, apparently operated the butterfly valve in the intake, has something to do with the emmissions.
http://www.outerlimits4x4.com/phpBB2/vi ... hlight=tps
Posted: Mon Feb 18, 2008 2:46 pm
by GUJohnno
As the name suggests, it senses the throttle position and is wired up to the auto computer.
When mine was playing up it wouldn't kick down the gears when the accelerator was put down and it was stuck in top gear (limp home mode).
There are two versions. A 3 wire unit and a 6 wire unit which mine was (for a diesel GQ auto). The 6 wire units are hard to find over here.
Posted: Tue Feb 19, 2008 7:47 am
by nzdarin
The Throttle position sensor and the throttle positon switch are within the same unit on the pump as shown above. Each use 3 wires.
Posted: Tue Feb 19, 2008 8:57 am
by Hobbz
Nice ... Thanks so far !
Now what is the Throttle position switch´s function ? I know what the Throttle position sensor does but not the switch .....
Posted: Tue Feb 19, 2008 9:28 am
by tweak'e
afaik the switch side of the TPS is usually an idle switch.
i would assume its so the ECU always knows where idle postion is as the variable resistor can change value due to wear on the contacts (rather than relying on the variable resistor to determine idle). basicly a safe guard in case of TPS failure.
both are used together, for auto box and emmision systems (egr + butterfly)
Posted: Tue Feb 19, 2008 5:10 pm
by ausoops
what is the switch on top of the accelerator pedal that operates at foot to the floor used for? im thinking it is the full throttle position switch.
Posted: Wed Feb 20, 2008 9:11 am
by Hobbz
Thanks for the absolutely brilliant info !