Diagnostic Procedure 1

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 Electronic Key Insert Signal
Check voltage between NATS IMMU connector M32 terminal 2 (PU/W) and ground.

Fig 1: Checking Electronic Key Insert Signal (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Electronic Key Insert Signal (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK : Replace NATS IMMU.
2. NG : GO TO 2.
Check Key Switch Circuit
1. Remove the key from the ignition key cylinder.
2. Disconnect NATS IMMU and key switch and key lock solenoid (key switch) connector.
3. Check continuity between NATS IMMU connector M32 terminal 2 (PU/W) and key switch and key lock solenoid (key switch) connector M64 terminal 4 (PU/W).
  
  Fig 3: Checking Key Switch Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Continuity should exist.
OK or NG
1. OK : GO TO 3.
2. NG : Repair or replace harness.
Check Key Switch
Check continuity between key switch terminals.

Fig 4: Checking Key Switch (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: Checking Key Switch (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK : Check the following.
- 10A fuse [No. 32, located in fuse block (J/B) No. 2]
- Harness for open or short between key switch and fuse
NG : Replace key switch.