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