Diagnostic Procedure 3

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Check Security Indicator Power Supply Circuit
1. Turn ignition switch OFF.
2. Disconnect the security indicator lamp connector.
3. Check voltage between security indicator lamp connector M73 terminal 2 (Y/G) and ground.
  
  Fig 1: Checking Security Indicator Power Supply Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  2 (Y/G) - Ground : Battery voltage
OK or NG
1. OK : GO TO 2.
2. NG : Check harness for open or short between fuse block and security indicator lamp.
Check Security Indicator Ground Circuit
1. Disconnect the NATS IMMU connector.
2. Check continuity between security indicator lamp connector M73 terminal 1 (G) and NATS IMMU connector M32 terminal 15 (G).
  
  Fig 2: Checking Security Indicator Ground Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  1 (G) - 15 (G): Continuity should exist.
3. Check continuity between NATS IMMU connector M32 terminal 15 (G) and ground.
  15 (G) - Ground : Continuity should not exist.
OK or NG
1. OK : GO TO 3.
2. NG : Repair or replace harness.
Check Security Indicator Ground Signal
1. Connect NATS IMMU connector.
2. Check continuity between NATS IMMU connector M32 terminal 15 (G) and ground.
  15 (G)- Ground : Continuity should exist intermittently.
OK or NG
1. OK : Replace security indicator lamp.
2. NG : Replace NATS IMMU.
Fig 3: Checking Security Indicator Ground Signal
Courtesy of NISSAN MOTOR CO., U.S.A.