Key Switch (Inserted) Check

CHECK KEY SWITCH INPUT SIGNAL
1. Disconnect smart entrance control unit harness connector.
2. Check voltage between smart entrance control unit harness connector M111 terminal 25 (W/G) and ground.
  
  Fig 1: Checking Voltage Between Smart Entrance Control Unit Harness Connector M111 Terminal 25 (W/G) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Refer to WIRING DIAGRAM - KEYLES - .
OK or NG
1. OK: Key switch is OK.
2. NG: GO TO 2.
CHECK KEY SWITCH POWER SUPPLY
1. Disconnect key switch harness connector.
2. Check voltage between key switch harness connector terminal 1 and ground.
Battery voltage should exist.

Refer to WIRING DIAGRAM - KEYLES - .

OK or NG
1. OK: GO TO 3.
2. NG: Check the following
  - 7.5A fuse [No. 28, located in the fuse block (J/B)]
  - Harness for open or short between key switch and fuse
Fig 2: Checking Voltage Between Key Switch Harness Connector Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
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 3: Checking Continuity Between Terminals 1 And 2
Courtesy of NISSAN MOTOR CO., U.S.A.