Cooling System: Description and Operation
Circuit DescriptionPCM (Powertrain Control Module) controls the operation of the radiator fan motor and the condenser fan motor through relay control. The control module monitors coolant temperature through engine coolant temperature sensor.
The module also monitors A/C operation through the A/C switch ON input and A/C pressure switch input. Using these signals, the module controls the coil of the appropriate relays (condenser fan relays and radiator fan relay) to provide optimal cooling fan operation.