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Originally Posted by Ivoidwarranty
I like how you worded everything. It looks like you know what you are talking about. I only have one issue with all you posted and that is calling the APPS the same thing as a TPS. On a lot of cars the TPS is mounted on or to the throttle body and tells the computer how far the throttle blade is open. This was a lot more common back when the throttle was still cable driven and the computer didn't have any other input. For example, my brothers Ram has a cable controlling the tb and a TPS while my Ram (one year newer) is drive by wire and has a APPS. I have the FSM for both and mine specifically talks about how it does not have a TPS.
I wonder if the domestics and imports differ in this???
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APPS is pretty clear, the sensor is mounted to the pedal itself. However I've seen the term TPS used when the sensor is mounted on either the pedal or the throttle body, it depends on the semantics that the manufacturer uses.
The Japanese and European cars were first to move to a drive by wire system, where as the American cars held onto the mechanically operated throttle body for a long time and simply mount the sensor to the throttle body itself (retrofit rather than redesign).
Note that the Nissan sensor uses a typical voltage range of 0.4 to 4.8V. Because the actual voltages vary slightly between vehicles, they have a feature that learns the up pedal voltage for your specific car. For down pedal anything beyond 4.0V is interpreted as WOT.