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Thread: How TPMS is reset in the model S...

  1. #1
    S VIN S1049, X Resv S744
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    How TPMS is reset in the model S...

    The ranger (Hi, Leo!) was out to work on my car over the past couple of days, to resolve the issues that I had. Part of this was a generic TPMS error that appeared from the moment the car was delivered.

    The procedure goes something like this:

    1. Using a hand-held programmer, called the "Tesla multi-tool", the ranger walks around to each of the tires and holds the tool against the valve stem on each wheel, presses a button, and the tool scans for the TPMS sensor ID. This procedure, if I recall correctly, starts with left front, proceeds to right front and right rear, then to left rear.
    2. Once all of the wheels are scanned into the tool and displayed on the screen, the device is plugged into a connector in the car below the touch screen, and the multi-tool pushes the ID's to the car's computer.

    There is also a service bulletin that has been published for the service centers to reduce the low tire pressure alert from ~38 psi to ~36 PSI to deal with pressure reduction due to cold weather. The same tool is used to program the TPMS system's parameters.

    For those wondering whether the Model S knows the individual tire sensor locations, the answer is yes -- they must be scanned in order.

    This gives us hope that some day, the tool may not be needed, if the touchscreen computer could interact with the TPMS to learn the sensors in the same way that my Chevy does -- flash the front left turn signal, then watch TPMS sensors until they report a reduction or increase in PSI of 1-2 PSI (while you add or let out air in the specified tire), then move to other wheels in order. That way, the special tool wouldn't be needed.

  2. #2
    That would be great. My wife's old murano could tell the psi at each wheel. I miss that

  3. #3
    Senior Member mknox's Avatar
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    Quote Originally Posted by FlasherZ View Post
    This gives us hope that some day, the tool may not be needed, if the touchscreen computer could interact with the TPMS to learn the sensors in the same way that my Chevy does -- flash the front left turn signal, then watch TPMS sensors until they report a reduction or increase in PSI of 1-2 PSI (while you add or let out air in the specified tire), then move to other wheels in order. That way, the special tool wouldn't be needed.
    My Cadillac works the same way - - must be a GM thing. Thanks for the report. Hopefully we'll see that in a future software update.

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    Roadster 919, S 2006 Doug_G's Avatar
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    Quote Originally Posted by AnOutsider View Post
    That would be great. My wife's old murano could tell the psi at each wheel. I miss that
    Really? My old Murano had no clue which wheel was which, and they moved around the display every time you started the car.
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    Model S VIN P01536 Robert.Boston's Avatar
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    Quote Originally Posted by FlasherZ View Post
    1. Using a hand-held programmer, called the "Tesla multi-tool",
    We used to call those things "tricorders".

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    3 questions about TPMS.

    what happen to TPMS if I change from summer to winther wheels ? can the Model S store multiply TPMS id's, so no reprogramming would be needed.
    what when I switch back again (e.g. winther / summer), would I require to mount the wheels in same order,I would personally do wheel rotation to minimice wear on the tires.
    Would it be posible to use non Tesla wheels

    - anybody know the answer ?
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    Roadster #1144 + Sig 114 dsm363's Avatar
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    Quote Originally Posted by NielsChr View Post
    3 questions about TPMS.

    what happen to TPMS if I change from summer to winther wheels ? can the Model S store multiply TPMS id's, so no reprogramming would be needed.
    what when I switch back again (e.g. winther / summer), would I require to mount the wheels in same order,I would personally do wheel rotation to minimice wear on the tires.
    Would it be posible to use non Tesla wheels

    - anybody know the answer ?
    It currently requires a Tesla Ranger (or service center) to reprogram the wheels again (even if they've been programmed before). I heard they are working on a solution where you store two sets of tires (for example summer and winter tires) and once they are both programmed, you simple click 'switch to set A' and they will work. It sounds like it's simply a software issue so maybe auto learning is also in the works.

    You can use non-Tesla wheels but would need a sensor from Tesla and have them programmed.
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    S85 - VIN:P05130 - 3/2/13 jerry33's Avatar
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    Quote Originally Posted by NielsChr View Post
    what happen to TPMS if I change from summer to winther wheels ? can the Model S store multiply TPMS id's, so no reprogramming would be needed.
    So far from the various posts it sounds as if they can't do that. It must be programmed for each wheel change. Apparently it can't store the information for two sets of wheels. The TPMS regulations are pretty lame when it comes to how wheels and tires are actually used, and TPMSs are typically made to conform to the regulations and no more. Perhaps Tesla will address this issue in the future. A robust tire monitoring and inflation system would be a nice addition to the Tech package in a future Model S.

    Quote Originally Posted by NielsChr View Post
    what when I switch back again (e.g. winther / summer), would I require to mount the wheels in same order,I would personally do wheel rotation to minimice wear on the tires.
    I don't believe it matters which position the wheel is in for the TPMS to work. The TPMS base system in the car doesn't keep track of which wheel is in which position.

    Quote Originally Posted by NielsChr View Post
    Would it be posible to use non Tesla wheels
    If you have the Tesla TPMS sensors for the wheels. The sensors have to talk to the base unit, and so far only the Tesla sensors are known to work. Tesla no doubt purchases the TPMS so perhaps someone will find out who makes it and what other sensors can be used (if any). Wheel sizing and other factors are discussed here and here.
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  9. #9
    What happens when you rotate the wheels? Vehicles I have had with TPMS provided information as to the tire pressure for each tire. For example, it may say the left front wheel is 40psi. What happens when you move the left front wheel to, for example, the left rear wheel position? Does the system need to be reprogrammed to reflect the new location of the tire, or does it automatically know where the tire has been moved to?

  10. #10
    Roadster #1144 + Sig 114 dsm363's Avatar
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    I had my tires rotated today and don't think he reprogrammed them. I'll ask him to double check though.

    - - - Updated - - -

    Talk about service. Sent my Ranger an e-mail (he had been up working until midnight on Friday and still drive the 90 min to my house to get there at 8:45AM) and heard back within 30 min.

    He said it is a good idea to reprogram the tires again after they are rotated so looks like you have to do that. An auto-learning function would be nice.
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