Possible Causes
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
BELT SWITCH CIRCUITS SHORT TO GROUND
DRIVER SEAT BELT SWITCH CIRCUITS SHORT TOGETHER
DRIVER SEAT BELT SWITCH CIRCUITS SHORT TO GROUND
ACM, DRIVER SBS SHORT TOGETHER OR GROUND
STORED CODE OR INTERMITTENT CONDITION
ACTIVE CODE PRESENT