Town & Country SWB FWD V6-3.3L VIN G Flex Fuel (2000)
Radiator Cooling Fan Motor: Description and Operation
Heavy Duty Cooling
Cooling Module W/Heavy Duty Cooling
The engine cooling fans are controlled by the solid state radiator fan relay. The fan relay is controlled by the Powertrain Control Module (PCM) by way
of a Pulse Width Modulated (PWM) signal. The relay control circuit supplies a 12 volt signal to the PCM. The PCM then pulses the ground circuit to
achieve fan on time. The relay provides a voltage to the fan motors which is proportional to the pulse width it receives from the PCM. The duty cycle
ranges from 30 % for low speed operation, then ramps up to 100 % for high speed operation. This fan control system provides infinitely variable fan
speeds, allowing for improved fan noise, A/C performance, better engine cooling, and additional vehicle power.
