I wouldn't see why not... its just a system the monitors the air pressure and reports it back to the vehicle.
The only difference, perhaps, may be the "correct" inflation pressure in the vehicle's EVIC, i.e., the 18" Michelin's require X-psi and the 20" Fortera's require Y-psi. That may even be the same number - not sure as I have never looked. If they are different, I am sure the dealership could "re-program" the EVIC easily - of course at a cost
A lot of other members have purchased 2nd rims from Mopar so they may be better equipped to answer.