Component Inspection

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch "OFF". (Stay for at least 5 second.)
Disconnect 4WD shift switch harness connector.
Operate 4WD shift switch and check continuity between 4WD shift switch terminals.

Fig 1: 4WD Shift Switch Harness Connector Terminal Continuity Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Continuity Between 4WD Shift Switch Terminals
Courtesy of NISSAN MOTOR CO., U.S.A.
If NG, replace the 4WD shift switch.