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Will Model D finally deliver REAL TPMS?

Discussion in 'Model S' started by Hank42, Oct 18, 2014.

  1. Hank42

    Hank42 Member

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    With all the new technical advancements and the like, I wonder if Tesla will finally take this opportunity to introduce TPMS that has actual pressures for each wheel, instead of "Low pressure, check (all your) tires". And that goes for other seemingly common things that lesser cars come standard with.
     
  2. bluetinc

    bluetinc Member

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    This is already available on all cars, Tesla just doesn't show it to the user :-/
     
  3. MartinAustin

    MartinAustin Active Member

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    Is it visible in, uh, VisibleTesla?

    (haven't checked lately)
     
  4. bollar

    bollar Disgruntled Member

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    No, that's not revealed in the API.
     
  5. artsci

    artsci Sponsor

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    Not being willing to wait, and having been burned a few times by a system that does not read and report the pressure in each tire, I ordered these: Fobo Tires Bluetooth TPMS. Should have them in early November. With these you can monitor tire pressure 24/7 with your phone, whereever you are. I'm assuming Tesla will eventually do this but who knows when?
     
  6. sundoc

    sundoc Member

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    This is pretty cool!
    Thanks for sharing the link.
     
  7. tom66

    tom66 Member

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    There might be a reason Tesla doesn't do this. Some TPMS sensors can only sense a deflated tyre by measuring the wheel speed and rotation characteristics, they can't give a pressure measurement, just a "this tyre is bad." They should be able to tell you which is deflated though...
     
  8. wallet.dat

    wallet.dat Member

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    Not to mention the fact that you have 4 different sensors with possibly 4 different calibrations. I'd rather leave it to a single gauge, measured regularly.
     
  9. Hank42

    Hank42 Member

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    I don't follow; There are still 4 sensors ( How many lights? - YouTube ) on the Tesla. If FOBO can do this cheaply and effectivly, and GM can do it on far "lesser" cars, I fail to see why Tesla can't/won't. I do realize, it's just tire pressure sensors and certainly not a deal breaker for us buyers - but I can't shake the feeling that Tesla got a good deal buying some manufacturer out of thier entire inventory of obsolete tire pressure sensors :)
     
  10. fiksegts

    fiksegts Active Member

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    I would like to see the pressures as well... my McLaren shows pressure and temperature for each tire....
     
  11. Andrew Wolfe

    Andrew Wolfe Roadster 472 - S 440

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    Roadster does it. I'd bet they just haven't gotten around to writing any UI code to show it.
     
  12. yesup

    yesup Member

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    Are you sure?
    Has anyone changed tires and did the sensors need to be installed/replaced/

    The TPMS which do not give pressure readout are usually the indirect TPMS type - i.e. there are NO tire sensors. The system works by comparing the rotation speed and resonance frequency of the tires using existing ABS sensors.

    For some reasons, indirect TPMS systems, which fell out of favor, are making a comeback - some VW & Audi, Mazda and most of all the new Honda have switched back to indirect systems (?cost saving).
     
  13. Johan

    Johan Took a TSLA bear test. Came back negative.

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    Are you suggesting Tesla has changed their TPMS system from sensor to software based (rotational analysis) through software updates without telling the customers or regulators???
     
  14. tga

    tga Active Member

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    Indirect systems "fell out of favor" because the original designs could not meet the performance requirements of the DOT when they started mandating systems in 2005(?). To meet the DOT requirements, direct systems (with a pressure sensor in each wheel) were necessary. Manufacturers have improved indirect systems so they can meed the DOT requirements, so many are switching to them for cost savings over direct systems that use a TPMS at each wheel.

    The Tesla system is a direct system, with a sensor at each wheel. As discussed many times in the past, they have access to the individual tire readings; the just choose not to give the info to the driver.
     
  15. Kandiru

    Kandiru Member

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    NP my soon to be traded for an S85D 2012 Audi S4 has an indirect sensorless system that is very good, not once did it alert me with cooler weather.

    Also for a TireRack superuser the indirect systems are a Godsent, there is nothing to program.
     
  16. tga

    tga Active Member

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    The Dill branded system that Tire Rack sells are direct, not indirect. There is a sensor in each wheel (direct); they do not monitor ABS sensors for wheel speed (indirect). From the description:

    "The system relies on an aluminum valve stem transmitter/sensor installed in each wheel to continuously monitor pressure and temperature"
     
  17. markb1

    markb1 Active Member

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    At little bit of info to add to the discussion:

    Over the weekend, I had a TPMS error pop up twice and eventual clear itself. (I don't remember the exact wording, but it was not a low pressure warning. It did say to contact the service center.) I called them, and they were able to remotely diagnose it as a communication problem with the right rear sensor. So the software can distinguish between the four sensors.
     
  18. austinEV

    austinEV Active Member

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    I get that one all the time. It is when it rains :(
     
  19. Gizmotoy

    Gizmotoy Active Member

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    I recall, however, that our system uses a singular receiver instead of one in each wheel well. That is, we know the pressures of each individual tire, but not the actual current location of that tire. That would go a long way towards explaining why Tesla hasn't exposed this, as it would be confusing to owners.
     
  20. ElSupreme

    ElSupreme Model S 03182

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    My car has had this symptom 'fixed' three times now. Including once adding a new receiving antenna supposedly.And it started throwing the same fault again. :frown:
     

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