Rear Blower Motor
WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
Check that there are no foreign particles inside the intake unit.
Apply 12 volts to terminal + and ground to terminal - and ensure that the blower motor rotates freely and quietly.
Courtesy of NISSAN MOTOR CO., U.S.A.