Seat Belt Buckle Switch (Driver Side)

Check continuity between terminals 60 and 61A.

60 - 61A 

When seat belt (driver side) is fastened : Continuity should not exist. 

When seat belt (driver side) is unfastened : Continuity should exist. 

Fig 1: Identifying Seat Belt Buckle Switch

Courtesy of NISSAN MOTOR CO., U.S.A.