DTC P0480: Radiator Cooling Fan Control Circuit Malfunction: Description
WARNING: This page is about a different car, the 2002 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.
Radiator cooling fan is turned on and off the radiator fan relay. Relay is in turn controlled by the Engine Control Module (ECM). When engine coolant temperature reaches 208°F (98°C) or more ECM signals relay and radiator cooling fan will turn on. When engine coolant temperature is less than 200°F (93°C) fan is turned off.