3. Check Key Switch And Key Lock Solenoid Circuit

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

Disconnect BCM connector.
Check continuity between the BCM harness connector M18 terminal 37 (B/R) and key switch and key lock solenoid harness connector M27 terminal 4 (B/R).
Check continuity between BCM harness connector M18 terminal 37 (B/R) and ground.
1. 37 (B/R) - 4 (B/R): Continuity should exist
2. 37 (B/R) - Ground: Continuity should not exist

Fig 1: Checking Continuity

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

OK or NG

OK >> Check the following.
- 10A fuse [No. 19, located in fuse block (J/B)]
- Harness for open or short between key switch and key lock solenoid and fuse
NG >> Repair or replace harness.