Quote:
Originally Posted by ItsPeteReally
You can take things a little too far in the search for accuracy
Without knowing anything at all about the ECU I think we can safely surmise that the TPS voltage read by the ECU is unlikely to be used to access a myriad of subtly different lookup tables. I'd be very surprised if the TPS output was interpreted as being any more than the equivalent of none, a little, some, a lot, and maximum, which would call for five different mappings (and I suspect that this is too many!).
Similarly, I would venture that other voltages are only significant to the CPU when they cross certain threshold values.
Most inputs can be categorised as rich/lean, cold/hot, etc.
I don't dispute that the input values are readable to quite high degrees of apparent accuracy but I have my doubts as to the dependability of the calibration behind them.
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I am confident that set points or calibration to a known value/figure will not be involved, and as you state there will be no apparent accuracy based on any specified criteria.
I think Phil has it right in considering the reading/indication/signal, always in terms of a percentage. As you say a percentage of between none and maximum and not as a specific measurement of a quantity/value/'position/whatever.