Radiator Cooling Fan Motor Relay: Description and Operation
RADIATOR FAN RELAY - PCM OUTPUTThe electric radiator cooling fan relay is located in the Power Distribution Center (PDC).
An electric radiator cooling fan is used with certain models/engines. It is controlled by the Powertrain Control Module (PCM) through the radiator fan relay. Not Equipped With A/C: The relay is energized when coolant temperature is above 103 °C (217 °F). It will then de-energize when coolant temperature drops to 98 °C (208 °F). Refer to Cooling Systems for additional information. Equipped With A/C: In addition to using coolant temperatures to control cooling fan operation, a two-gang A/C high-pressure switch is also used to control cooling fan operation. When equipped with this high-pressure switch, the cooling fan will not operate each time the A/C clutch is engaged. Refer to Heating and Air Conditioning for additional information.