The radiator cooling fan is controlled by the engine management system's Power train Control Module (PCM), acting on the information received from the cylinder head temperature (CHT) or engine coolant temperature (ECT) sensor. Warm the engine up until the gauge on the instrument panel indicates the high side of NORMAL. The fan should come on. If it does not, check the cooling fan fuse and relays. It's possible that the CHECK ENGINE light may come on indicating a stored diagnostic trouble code (DTC) if there is a problem with the cooling fan circuit. To test the fan motor, unplug the fan electrical connector and use fused jumper wires to connect the fan directly to the battery. If the fan still does not work, replace the motor by removing the fan and its mounting fasteners. If the motor works, the problem is with a temperature sensor or engine management system or in the wiring. Disconnect the cable from the negative battery terminal. Remove the air duct between the air filter housing and throttle body. On 2011 and later models, disconnect the air duct from the fan shroud. Unbolt the coolant expansion tank and the power steering fluid reservoir (if equipped) from the fan shroud and move them aside. Disconnect the fan electrical connector on the fan shroud. Remove the fan shroud mounting bolts and then carefully remove the assembly from the engine compartment. Installation is the reverse of removal. Tighten the shroud fasteners securely and, if separated, tighten the fan mounting bolts securely.