Without CONSULT-II

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect BCM connector.
Check voltage between BCM harness connector M4 terminal 69 (PU/W) and ground.
When key is inserted to ignition key cylinder: Approx. 12V

When key is removed to ignition key cylinder: Approx. 0V

Fig 1: Checking Key Switch input Signal (Without Consult-II)
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Key switch and key lock solenoid (key switch) is OK.
NG: GO TO 2 .