Basic system will let you know when there is a low tire pressure. It will display an icon on your dash indicating so. It will go away when all tires including spare are at or above the appropriate level. You dont know what tire is low however.
The premium system, the one i have, will display in the EVIC a little picture of your Jeep with numbers at each corner of the picture. These of course indicate all four tires pressure level. When it is low it will ding flash the pressure in psi or kpa and indicate "Right Rear Pressure LOW" for example. When the spare is low, It will indicate "Spare Tire LOW" but not give a number pressure if the spare is low.
My system will automatically retrain the tire sensors if the tires are rotated. It will know which one is which.
To retrain sensors... i only know how to do it on my mothers 03 WJ limited. It might be a similar process however. You have to go into the evic and select retrain tire sensors. You have to get a round magnet to train them. Once you hit yes to retrain, it will prompt you to train each sensor ie: "left front". HOld the magnet over the sensor then the evic will beep twice and then display which one to train next. When it is complete it will beep again saying training complete. I dont know if this is the same way for the new Jeeps but i hop this helps somone with the older models too
Mike, 26, have a 2006 Dark Khaki WK Limited 4.7L; SICK stock 17" 5 Spoke Ronins :/ , Walker QuietFlow muffler, 7500K headlamp and fog Halogens, LED license plate lighting, Interior LED lighting, Champion Platinum Power spark plugs.