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Home >> Jeep >> 2009 >> Patriot 2WD L4-2.4L >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Cooling System >> Radiator Cooling Fan >> Description and Operation >> Cooling Fan - Operation

Cooling Fan - Operation






GAS ENGINE

Radiator fan operation is controlled by the Totally Integrated Power Module (TIPM), with inputs from the engine coolant temperature sensor, continuously variable transmission (CVT) oil temperature, and A/C head pressure. The (TIPM) turns on the fan through either the high or low speed fan relay. The PCM provides a ground to the relay's control circuit. The fan relays are located in the (TIPM). Refer to the label beneath the (TIPM) cover for location of fan relays.
If the cooling fan is inoperative or a Diagnostic Trouble Code (DTC) related to fan control has been set, Testing and Inspection for diagnostic procedures.