Radiator Cooling Fan Motor: Description and Operation

OPERATION
With A/C ON, the cooling fan motors will run continuously. Cooling fan motors will not cycle ON and OFF with A/C clutch. An exception to this is when vehicle speed is over 61 km/h (38 mph) and coolant temperature is below 100°C (212°F), and A/C head pressure is below 1.71 MPA (250 psi). The cooling fan motors will then automatically shut off.
With A/C OFF, The constant control relay module (CCRM) actuates the cooling fan motors when:
- the engine coolant reaches a specified temperature.
- the engine reaches a specified speed.
- the A/C clutch is activated.