WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
Apply battery voltage directly to terminals 3 and 4.
Check continuity between terminals 1 and 2.
Fig 1: Transfer Motor Relay Terminals Continuity Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Check Continuity Between Transfer Motor Relay Terminals