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TPMS Management with Techstream

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by wjtracy, Mar 5, 2016.

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  1. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Or just raise all pressures, say to max sidewall, then drop them one at a time.
     
    #41 Mendel Leisk, Jul 30, 2018
  2. talonts

    talonts VFAQman

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    Hahahahahahahhahahahaa! Um, NO. Florida doesn't seem to require squat, and has no vehicle inspections. Basic lights are about it, sand rails are road legal with few mods.
     
    #42 talonts, Aug 1, 2018
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  3. wjtracy

    wjtracy Senior Member

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    Wrap up
    So my TPMS experiment is over... I have now replaced all of my TPMS with new OEM Deno's from Amazon (~$33 each).

    > My "fake" reading using the binder clip method on a spare TPMS is still working after several years, so that was a good way to get the warning light off.

    >> I was surprised three of my orig TPMS batteries lasted 12 years...the first one died at 9.5 years.

    Interestingly, I see my daughter's 2010 Honda Civic TPMS is a little better than Toyota Prius TPMS implementation.
    She has two warning lights: (1) one light for low tire pressure reading, and (2) then a "TPMS" text light which pops up if a TPMS is not sending a signal (e.g low battery). So her TPMS system still works to monitor pressure in the tires, even if one or more of the TPMS has stopped giving a reading.

    Cost- I am a bit pissed about TPMS replacement cost labor. My tire installer (Tire Rack installer) charges me $30 labor for new TPMS (per tire) and this +$30 labor charge is additional onto their normal tire installation charge, which is already high at about $40/tire. Keep in mind, I personally supplied the new TPMS units and furthermore I preset the TPMS codes as well, such that they did not even have to do that. Thus I did not save any money by waiting to replace the TPMS when I replaced the tires. I may be done using that tire installer, although they are a high quality shop.

    Overall, I really wonder if TPMS is worthwhile due to replacement costs, and also TPMS units seeem to be causing as many flats as they are preventing. My other vehicle had a near blowout on the highway when a TPMS stem rusted thru.
     
    #43 wjtracy, Nov 26, 2018
    Last edited: Nov 26, 2018
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  4. bisco

    bisco cookie crumbler

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    agreed. if mine needed replacing, i wouldn't. but i check my pressures regularly.
     
    #44 bisco, Nov 26, 2018
  5. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    ^ I actually thought I musta posted that. Had to check the avatar.
     
    #45 Mendel Leisk, Nov 26, 2018
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  6. Sezy

    Sezy Active Member

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    Fixed!!! Got a ATEQ reset tool which showed me different ID's than a screenshot I took from tech stream a while back. The car computer had my aftermarket summer rims saved. Had a friend with a sensor reading tool get me the ID's off my factory rims then programmed them into the car with this Ateq tool. Could have done it all in Techstream but this was quicker.
    ATEQ Quickset Light TPMS Reset Tool
     
    #46 Sezy, Dec 8, 2018
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  7. jack black

    jack black Active Member

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    WOW! very useful info. i ordered these TPMS sensors (not for prius, but some other toyota car) and i'll use the squeezing trick to test them before mounting.
     
    #47 jack black, Oct 1, 2019
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  8. wjtracy

    wjtracy Senior Member

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    Still working in the binder clip at 13 years old! No longer needed in my car.
    I tried to use in my other car, dang, turns out my other car is 433 hz so not compatible.
    I could not seem to emulate the trick on other car's TPMS.
    I got a Autel TPMS reader so I can see it is still working....reports low battery..unsurprisingly
     
    #48 wjtracy, Oct 1, 2019
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  9. jack black

    jack black Active Member

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    @wjtracy
    update. i got the new Denso sensors, they are a bit redesigned and i could not make them work with the paper clip like you did. they work fine installed and registered by techstream. i'm pleasantly surprised by walmart tire. they installed the new TPMS sensors for free and returned the old sensors. there is a video on youtube how to replace a battery in those.
     
    #49 jack black, Oct 21, 2019
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  10. SFO

    SFO Senior Member

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    Is there a part # you could share for these updated TPMS sensors that have replaceable batteries?
     
    #50 SFO, Oct 21, 2019
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  11. wjtracy

    wjtracy Senior Member

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    That would be intersting if you could change batteries, usually they are the welded in type. But with some hacking you could I suppose.
    I have a TPMS that I recently dissected (non Denso ) batt is a Maxell CR2450HR...looks like this one
    [​IMG]
     
    #51 wjtracy, Oct 21, 2019
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  12. jack black

    jack black Active Member

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    no it's not that. the old sensors can be hacked to replace the battery see here:

     
    #52 jack black, Oct 23, 2019
  13. Jeff_5_7

    Jeff_5_7 Junior Member

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    I know this is a very old post but this is by far some of the best information I have found on Toyotas TPMS ECU and communication. I created this account strictly to be able to reach out to you. Would have PM or conversation but I could not get that to work.

    Anyway, if you had anymore info on the K-line and data received and transmitted via the Tire Pressure ECU, it sure would help me. I am in the process of developing a serial reading to get data from the K Line. I extensively worked with CAN bus over the last few months and have that working well. However the only way I can retrieve TMPS info is from the K line on my Toyota. As far as I can tell the only way to get Temp and Pressure readings from all 4 tires is to Query the K-Line with a command and read the response? Right?

    If you could reach out to me via email Jeff_5_7 @ yahoo com. Maybe you could share more on how you identified ECU addresses and the signals the produce/receive ect. I have the mini VCI and Techsteam. That is where I started.
    Thanks Jeff
     
    #53 Jeff_5_7, Jan 10, 2022
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  14. ydpplqbd

    ydpplqbd Active Member

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    I like the concept of your work and this thread. However my CAN bus reading knowledge is very limited. I love the thread. If you provide some more background then maybe I can be substantively active in the discussion. Many thanks.
     
    #54 ydpplqbd, Jan 11, 2022
  15. wjtracy

    wjtracy Senior Member

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    Still have the PiP? TPMS still OK after 10 years?
     
    #55 wjtracy, Feb 24, 2022
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  16. bisco

    bisco cookie crumbler

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    yeah, i'm driving so little, i can't see replacing it. 80,000 miles, (only 25k on the engine) runs like brand new. never done anything but oil and filters, tires 3 or 4 years ago and a new 12v 2 years ago.
    heading into uncharted waters with the battery warranty ending this april. but i certainly wouldn't buy a new car until the shortages end.
     
    #56 bisco, Feb 24, 2022
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