3. Check Key Switch (Inserted)

Check continuity between terminals 1 and 2.

Continuity 

Condition of key switch : Key is inserted. 

Yes 

Condition of key switch : Key is removed. 

No 

OK or NG 

1. OK: Check harness for open or short between smart entrance control unit and key switch.
2. NG: Replace key switch.

Fig 1: Checking Key Switch (Inserted)

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