For Shift:

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Check continuity between terminals of the A/T device harness connector terminals.

Fig 1: Detention Switch Specifications Chart (Shift)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Detention Switch Testing Procedures (Shift)
Courtesy of NISSAN MOTOR CO., U.S.A.