Colt Vista 2WD L4-2350cc 2.4L SOHC (1993)
Radiator Cooling Fan Motor: Description and Operation
Fig. 56 - Radiator Fan Operation Mode
Radiator fan control is accomplished two ways. A pressure transducer on the compressor discharge line sends a signal to the powertrain control module
(PCM) which will activate the fans. The fans are also turned on by a coolant temperature sensor, which sends a message to the engine controller. The
engine controller then sends a signal to the fan relay which in turn switches the coolant fans On.
Switching through the engine controller provides fan control for the following conditions:
1.
Fans will not run during cranking until engine starts, no matter what coolant temperature is.
2.
Fan runs according to chart shown.
