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Thread: TPS Question

  1. #1
    Advanced Tuner arthansen's Avatar
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    TPS Question

    Because of the drive by wire nature of my car, I was wondering if the reported thottle possition is the commanded TP or reported TP. In other words, if I see 20% TP, is his what is commanded by the peddle or is this a reading from a sensor in the throttle body?
    2013 Jeep Wrangler JK
    3.6 V6
    More MODs than Stock

    2018 Ram rebel
    5.7 Hemi V8
    Stock

  2. #2
    Advanced Tuner
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    Germantown, MD
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    Re: TPS Question

    well.. its commanded by the peddle in some shape or form..

    however.. which is in turn based off the tps sensor.. and that sensor is also verified by that strange test.. that does two air mass calcs that puts FI cars into reduced paower mode..

    so..
    commanded by peddle
    articulated based on tps sensor
    tps is verified by random annoying error code thing

    thats my best guess anyway..

    -Bill
    2000 Camaro V6 Boltons and a tune

  3. #3

    Re: TPS Question

    I haven't looked at this on HP Tuner yet, but there are several different readbacks for throttle position on Ease (scanner). There is a requested throttle, commanded throttle, and actual throttle position, and a couple of others.

    With our fly by wire, it would be possible for the commanded throttle and the actual throttle to be different if the throttle body was limiting the power (the throttlebody actually controls the throttle, not the PCM).

    Hope that helps. John

  4. #4
    Tuner in Training
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    Re: TPS Question

    I also noticed that while scanning the car while shut off, if you hit the pedal the TPS will report a change.
    2002 Pewter V6 Camaro M5&&&&Quickest stock-motor N/A V6 4th Gen F-body.&&2nd Quickest N/A V6 4th Gen F-body overall.&&&&mods: Gear, !weight reduction, tuning&&&&Fear the Gear. 13.585 @ 100.05 1.827 60

  5. #5
    Advanced Tuner arthansen's Avatar
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    Re: TPS Question

    All good info, thanks. I guess what I should do is ask if the scanner could be changed to give us the commanded and the actual TP. Still not sure which one we are looking at in the scaner. Anyone know for sure?
    2013 Jeep Wrangler JK
    3.6 V6
    More MODs than Stock

    2018 Ram rebel
    5.7 Hemi V8
    Stock

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