Radiator Cooling Fan Motor: Description and Operation

Cooling Fan Module:

The cooling system fan module includes two electric motors, a motor support, and a one piece shroud. The module is fastened to the radiator by screws with square nuts and retaining clips.

The cooling system fans will operate at two speeds and are simultaneously activated. The dual fan system improves engine cooling and air conditioning performance in hot weather and severe driving conditions, while reducing fan noise and power consumption.

The cooling fans will operate based on inputs to the Powertrain Control Module (PCM). When fan operation is detemined necessary, the PCM provides a ground to the fan relay control circuit.

The inputs provided to the PCM that influence fan operation are:
- Coolant Temperature Sensor
- Intake Air Temperature Sensor
- Output Speed Sensor
- Transmission Oil Temperature Sensor
- A/C Pressure Transducer