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Does anyone have a picture or diagram of the location of my throttle position sensor please. Lexus is 250.

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It's integrated into the throttle body - not accessible as a separate item. See pics for location and inspection. Further tests involve the Intelligent Tester - a hand-held piece of kit which plugs in to the OBD11 port.

Throttle body.jpg

inspection.jpg

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Good info there Jon, to complete the drive by wire process won't there also be a pedal position sensor?

I'm not 100% certain if this is what Tony is asking or not.

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7 hours ago, johnatg said:

It's integrated into the throttle body - not accessible as a separate item. See pics for location and inspection. Further tests involve the Intelligent Tester - a hand-held piece of kit which plugs in to the OBD11 port.

Throttle body.jpg

inspection.jpg

Thanks very much John for the diagram and no wonder I can't find it if it's part of the motor mechanism. I read some were that is is a delicate part as if you don't get it correct It will play havoc with your engine. I'm no machanic but am willing to try. Any tips. 

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I suppose that IS250s don't really have a throttle position sensor as such - one understands that would be a sensor in the throttle body, measuring the position of the butterfly. The IS250 has a motor in the throttle body, driven by the ecu and acting on input from the switch, or 'sensor', on the accelerator pedal - as per diagram.

If there was no connection at either the pedal or throttle body I guess the engine would remain at idle and you wouldn't be going anywhere very quickly!

accelerator pedal.jpg

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10 hours ago, johnatg said:

I suppose that IS250s don't really have a throttle position sensor as such - one understands that would be a sensor in the throttle body, measuring the position of the butterfly. The IS250 has a motor in the throttle body, driven by the ecu and acting on input from the switch, or 'sensor', on the accelerator pedal - as per diagram.

If there was no connection at either the pedal or throttle body I guess the engine would remain at idle and you wouldn't be going anywhere very quickly!

accelerator pedal.jpg

Thanks again John for another diagram that explains a lot and will just clean the throttle body at the weekend and report my outcome. 

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Turns out that the is250 model in the UK at least does not have a throttle position sensor. There is a clip on YouTube that backs up this fact will try and post the clip and post if I can find out how to. 

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