TPMS

the way it works is tire rotation. there is no pressure sensor in the tire so it won't show pressure. a sensor in the tire is how the 1st gen TPS worked and after a few years you had to pay $500 to replace them because the batteries died.

in this one, it measures the rotation speed using the ABS sensor. when you fill it to appropriate pressure and then tell the computer it is ready to be calibrated, it can then tell when the pressure is lower because of faster rotation vs the other tires on the same side of the car. it will alert a low condition if it changes but not drastically, it will say to stop immediately if a drastic difference is detected meaning the tire has a big hole in it.

derekdal said:

the way it works is tire rotation. there is no pressure sensor in the tire so it won't show pressure. a sensor in the tire is how the 1st gen TPS worked and after a few years you had to pay $500 to replace them because the batteries died.

in this one, it measures the rotation speed using the ABS sensor. when you fill it to appropriate pressure and then tell the computer it is ready to be calibrated, it can then tell when the pressure is lower because of faster rotation vs the other tires on the same side of the car. it will alert a low condition if it changes but not drastically, it will say to stop immediately if a drastic difference is detected meaning the tire has a big hole in it.

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This is “learning moment“ for me! Thanks for the great explanation.

Yes thank you for the explanation.... so if the car was not constantly moving during the 20 mins of calibration will it not register/display? I set the tires at the beginning of a trip that was filled with stop and go traffic. Also and sorry if I am misunderstanding but will it ever show the tire pressure in each tire like some of my other cars have done in the past?

XenoX said:

Yes thank you for the explanation.... so if the car was not constantly moving during the 20 mins of calibration will it not register/display? I set the tires at the beginning of a trip that was filled with stop and go traffic. Also and sorry if I am misunderstanding but will it ever show the tire pressure in each tire like some of my other cars have done in the past?

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In all honesty, it probably takes all of 3 minutes of driving for it to actually register values/differences, just don't go driving on a road half full of ice

No, it does not show actual tire pressures, it will just display "Right Passenger low tire pressure" or something to that effect.

A big benefit of this system is that you can throw on other rims with winter tires, hit the TPMS reset, and you're all set. Otherwise you'd have to worry about swapping over the sensors, buying another set, etc.

CRVW said:

A big benefit of this system is that you can throw on other rims with winter tires, hit the TPMS reset, and you're all set. Otherwise you'd have to worry about swapping over the sensors, buying another set, etc.

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yup, overall this method is way easier and uses less hardware. it will never know the pressure because there is no gauge. I like not having to replace older TPMs because of radio or battery issues. it is super expensive and can be a pain to sync the radios on the gen 1 TPMs.

derekdal said:

the way it works is tire rotation. there is no pressure sensor in the tire so it won't show pressure. a sensor in the tire is how the 1st gen TPS worked and after a few years you had to pay $500 to replace them because the batteries died.

in this one, it measures the rotation speed using the ABS sensor. when you fill it to appropriate pressure and then tell the computer it is ready to be calibrated, it can then tell when the pressure is lower because of faster rotation vs the other tires on the same side of the car. it will alert a low condition if it changes but not drastically, it will say to stop immediately if a drastic difference is detected meaning the tire has a big hole in it.

Click to expand...

So 2022 Taos have no TPMS sensors in the tires from what you mentioned above?

that is my understanding of rev 2.0 TPMS, no actual pressure sensors in wheels from any manufacturer. The first generation did have sensors and they didn't work out too well. starting ~2006 models until not sure when they switched to this method. might be around 2009.

prostreetLX said:

So 2022 Taos have no TPMS sensors in the tires from what you mentioned above?

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Correct, no sensors in the wheels. Be grateful for that - I owned a 2004 VW Phaeton that had the first generation of TPMS with sensors in the wheels, and it was a very expensive system to maintain.

Be sure to only use the SET function for your TPMS system when the tires are stone cold, in other words, first thing in the morning when the vehicle has been sitting overnight. Tire pressures increase as the tires warm up when the vehicle is driven. The TPMS logic knows this and will disregard pressure increases... but if you 'SET' the pressures when the tires are hot, after driving, the system will notice the drop in pressure as they cool and assume you have lost pressure in some or all of the wheels.