Models With A/C

To reduce fan noise, the fan output is two-stepped and can be switched to Low or High according to the load on A/C, coolant temperature, and vehicle speed. This control is accomplished by a circuit as shown below; the output is changed by switching the connection of two motors between serial and parallel instead of using components such as resistors.

Fig 1: Circuit Diagram Fan - With A/C

Courtesy of SUBARU OF AMERICA, INC.