Cooling Fan Resistor
WARNING: This page is about a different car, the 2011 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.
The cooling fan resistor is attached to the fan shroud. Cooling fan motor-2 rotates at low speeds by the power supply from cooling fan relay-1 to cooling fan motor-2 through the cooling fan resistor.
Courtesy of NISSAN MOTOR CO., U.S.A.