Town & Country Van V6-201 3.3L VIN R SMFI (1990)
Radiator Cooling Fan Motor: Description and Operation
Fig. 1 Electric fan (Typical)
On 2.5L/4-156 engines, the fan is controlled by a fan switch which is located on the radiator.
The switch will automatically turn on when coolant temperature reaches 200 °F.
The ambient temperature switch, used on some 4-156 (2.6L) engines with air conditioning, is located on the radiator cooling fan mounting bracket and is
used in conjunction with a time delay to activate the radiator cooling fan for approximately 5-10 minutes with engine off during periods of radiator
ambient temperature of approximately 100°F or above.
On 2.5L/4-156 engines with A/C, when the A/C system is in operation, the fan motor will operate continually regardless of engine coolant temperature.
When the ignition switch is turned off, the fan will remain operating with ignition off for approximately 5-10 minutes if ambient temperature at radiator
is above a predetermined level.
On all except 2.5L/4-156 engines, the fan is controlled by an on board computer. Coolant temperature is sensed by the computers temperature sensor
which has two thermistor sensors, one of which is for the cooling system fan.
