TPMS Question.

[ctrcbob]

OK guys. I've never had the TPMS light come on, but it is my understanding that when the pressure in a tire gets low, not only does the TPMS light come on, it also tells you which tire (corner of car) is the low tire. (I think this is correct, but not sure).

If this is true, what happens when you do a tire rotation. I.E. If a tire was on the left front, and is now rotated to the right rear (example), and that tire goes low, what does the dash light tell you? How does the TPMS know what corner the tire is on?

 

[Wordman]

That's an interesting question! I don't know how the Genesis system works per se, but I found an explanatory generic article at http://www.aa1car.com/library/tire_monitors.htm. About half-way down the page, the article states: "Another issue with direct TPMS systems is keeping track of which wheel is which. Rotating the tires obviously changes the location of each transponder. So the system must be reset so the control module can relearn the position of each transponder. This may require the driver to push a reset button on the dash or to follow a menu on the driver information display."

I've only had my system come on once, because I'm too lazy to check my tires manually... It correctly identified the left rear as being low.

I'm sure there are people out there with more information on this!

 

[Mark_888]

OK guys. I've never had the TPMS light come on, but it is my understanding that when the pressure in a tire gets low, not only does the TPMS light come on, it also tells you which tire (corner of car) is the low tire. (I think this is correct, but not sure).

Yes (as Wordman pointed out above) it does identify the tire that is low. I have no idea how they do that.

 

[Gimli]

Each TPMS sensor has a different frequency and whenever you change the position of the tires on the car they have to be re-programmed.

Unfortunately, on the Genesis, that requires a dealer visit as there is no way to re-program the TPMS with the Hyundai scan tool.

 

[ttsig]

I'm not sure how it works on the Genesis, but I know on some vehicles (Accura, some Honda's) that there is an "initiator" (basically a very low power radio device) for all four tire locations. Each "initiator" talks only to the TPMS sensor at that specific location. That means that rotating the tires makes no difference since the system simply detects if the TPMS from a given initiator location is reporting low pressure.

There are other systems however, and I have no idea if the Genesis works this way. There are apparently systems which use the unique ID of the TMPS sensors to know the location and they must be "reprogrammed" during a rotation. I hope the Genesis has the "multi-initiator" system.

 

[Mark_888]

Each TPMS sensor has a different frequency and whenever you change the position of the tires on the car they have to be re-programmed.

Unfortunately, on the Genesis, that requires a dealer visit as there is no way to re-program the TPMS with the Hyundai scan tool.

From a practical standpoint, it might not be as bad as it sounds. If I get a warning, I would probbly check all tires anyway (as I did when it happened one time already).

 

[ttsig]

Each TPMS sensor has a different frequency and whenever you change the position of the tires on the car they have to be re-programmed.

I don't believe this is correct. Each TPMS sensor has a unique ID, but uses the same frequency. I've included a link to a video of the process of gathering the TPMS ID's for a Sonata, not much different for other Hyundai models (Hyundai uses both TRW and Lear TMPS systems on their other cars, but the Genesis might be completely different for all I know).

[ame="http://www.youtube.com/watch?v=I3lQ74hLbM0"]YouTube - Hyundai Sonata TPMS Tire Pressure Monitoring System[/ame]

Unfortunately, on the Genesis, that requires a dealer visit as there is no way to re-program the TPMS with the Hyundai scan tool.

This part may still be true, however, most cars have moved to an auto-learning system similar to the Acura and Honda system I mentioned earlier. I suspect that the Genesis also uses an auto-learning system based on the following comment in the Owner Guide:

If there is a failed tire sensor, it is possible for TPMS to temporarily learn a replacement sensor when you drive closely to another vehicle equipped with TPMS too. In rare cases, this may temporarily delay the TPMS malfucntion turning on.​

This implies that the Genesis TPMS system is auto-learning, if it can learn about sensors from a neighboring vehicle. The manual also covers tire rotation and never mentions having to bring it to the dealer. I'm not 100% sure it's auto-learning, but all of that together makes me think that it is.

I need a rotation right now so I'll try to do it myself this weekend and see if it works correctly and still recognizes low pressure in the correct location.

 

[Mgrig]

I had a Chrysler 300 that had TPMS, when the tires were rotated you needed to reset the tire with a supplied magnet. Not sure if the Genesis is done the same way, it makes no sense to have to bring it to the dealer to have it reset.

 

[Gimli]

I don't believe this is correct. Each TPMS sensor has a unique ID, but uses the same frequency. I've included a link to a video of the process of gathering the TPMS ID's for a Sonata, not much different for other Hyundai models (Hyundai uses both TRW and Lear TMPS systems on their other cars, but the Genesis might be completely different for all I know).

I stand corrected

This part may still be true, however, most cars have moved to an auto-learning system similar to the Acura and Honda system I mentioned earlier. I suspect that the Genesis also uses an auto-learning system based on the following comment in the Owner Guide:

If there is a failed tire sensor, it is possible for TPMS to temporarily learn a replacement sensor when you drive closely to another vehicle equipped with TPMS too. In rare cases, this may temporarily delay the TPMS malfucntion turning on.​

This implies that the Genesis TPMS system is auto-learning, if it can learn about sensors from a neighboring vehicle. The manual also covers tire rotation and never mentions having to bring it to the dealer. I'm not 100% sure it's auto-learning, but all of that together makes me think that it is.

I need a rotation right now so I'll try to do it myself this weekend and see if it works correctly and still recognizes low pressure in the correct location.

For this part I was going off what the Service department at my dealer told me but they may have been wrong (either consciously or not). They don't know a whole lot on the Genesis yet.

 

[WilhelmII]

I purchase winter tires and wheels with sensors from Tire Rack last fall. The sensors worked automatically with no intervention and showed the appropriate tire when low.

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[CanukV6]

I'm not sure how sophisticated the Genesis TPMS is (BTW, Canadian vehicles don't have it fitted), but it may use the direct sensors to detect low tire pressure and then use the ABS/ESC sensor to detect which wheel is consistantly rotating faster than the others. A low tire pressure will cause a slight reduction in tire diameter, so for a given road speed that tire/wheel will be turning at a higher rpm compared to the others.

 

[Richard Ft. Lauderdale]

I'm not sure how sophisticated the Genesis TPMS is (BTW, Canadian vehicles don't have it fitted), but it may use the direct sensors to detect low tire pressure and then use the ABS/ESC sensor to detect which wheel is consistantly rotating faster than the others. A low tire pressure will cause a slight reduction in tire diameter, so for a given road speed that tire/wheel will be turning at a higher rpm compared to the others.

When I had a nail in one of my tires the system warned me before I put the car in gear and it showed me which tire.

 

[ASHDUMP]

Sorry to kick up an old thread, but where can I buy TPMS for 18" V8 Genesis wheels? I would like to buy used ones online for winter, but they don't come with with the wheels.

Thanks,

Also, do I even need TPMS for them? Or can I just deal with the light being on?

 

[moose66]

Not sure I have ever seen anyone sell used ones. And if so, I am not sure I would buy them fearing they would not work. You can troll around on eBay to see if someone is selling them. I think, but am not exactly sure, that you can buy them new from TireRack.com (price unknown, but should be reasonable). I know they sell them, but they may only sell them when purchased with a wheel package.

You don't have to have them. But your TPMS warning light will stay on without them. You would also have to pay closer attention to your tires. As you should whether you have TPMS or not! Good luck!

 

[Mark_888]

You don't have to have them. But your TPMS warning light will stay on without them.

When my TPMS warning came on, I noticed that a lot other functionality of the display unit was unavailable until the problem was rectified. So I think that would be more than just a minor inconvenience of ignoring the warning message, and not acceptable as a permanent situation for most people.

 

[moose66]

Care to expand on what the "other functionality" would be? If I am reading this correctly, the TPMS warning light is tied in with additional functionality.

 

[ASHDUMP]

Thanks for the information. I find it hard to believe that a malfunction with the TPMS would cause other harm or create another feature to disable. I would like to know more about this as well though.

Possibly the traction/stability control would be affected?

 

[ASHDUMP]

Does anyone know where to purchase the TPMS if needed? Other than a dealership? Will universal ones work?

 

[Mark_888]

Care to expand on what the "other functionality" would be? If I am reading this correctly, the TPMS warning light is tied in with additional functionality.

Maybe it depends on which version of the car you have. On the Tech Package (I don't have that), maybe the TPMS info is on the display above the center console where the GPS screen is located? On my car the warning is on the instrument cluster above the steering wheel, and you cannot monitor MPG, Distance to empty, etc when the TPMS warning is on (to the best of my recollection). That is what I meant when I said you cannot use the other instrument cluster functions when the TPMS warning is on. But not sure about Tech Package.

 

[sandy]

Does anyone know where to purchase the TPMS if needed? Other than a dealership? Will universal ones work?

I'm looking at a Tire Rack as in this month's Motor Trend and they offer TPMS sensors for a range of vehicfles, priced from $140...1 888 372 8473