Jerod, I've just learned that there is an accelerator Pedal Position Sensor (PPS) too, in addition to the TPS. So, the PPS sends a "request" to the PCM, which commands the throttle motor to move the throttle, and the TPS reports back on the throttle's actual position. With this in mind, I'm changing my opinion about where the Accelerator Position readout is getting it's information. I think now it's likely from the PPS. Don't you wish we still had good old throttle cables?
Ah, the good old days!
- Jack