WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
Check continuity between terminals 1 and 2.
Fig 1: Overdrive Control Switch Continuity Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Checking Continuity Between Overdrive Control Switch Terminals