2. Check Key Switch Circuit

1. Disconnect key switch connector.
2. Check continuity between BCM connector M4 terminal 69 (PU/W) and key switch connector M64 terminal 4 (PU/W).
   1. 69 (PU/W) - 4 (PU/W) : Continuity should exist  .
3. Check continuity between BCM connector M4 terminal 69 (PU/W) and ground.
   1. 69 (PU/W) - Ground : Continuity should not exist  .

OK or NG 

1. OK: GO TO 3.
2. NG: Repair or replace harness.

Fig 1: Checking Key Switch Circuit

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