Power Supply And Ground Circuit Check

1. Disconnect smart entrance control unit harness connector.
2. Check voltage between smart entrance control unit harness connector M145 terminal 49 (R/B) or 51 (W/R) and ground.

Fig 1: Checking Main Power Supply Circuit For Smart Entrance Control Unit

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

Refer to wiring diagram in "WIRING DIAGRAM - KEYLES -  ".

OK or NG 

1. OK : GO TO 2.
2. NG : Check the following. 
   • 40A fusible link (letter I  located in fuse and fusible link box)
   • 10A fuse [No. 13, located in fuse block (J/B)]
   • E90 circuit breaker
   • Harness for open or short between smart entrance control unit and fuse

1. Disconnect smart entrance control unit harness connector.
2. Check voltage between smart entrance control unit harness connector M144 terminal 26 (PU) and ground while ignition switch is "ACC".

Fig 2: Checking Ignition Switch "ACC" Circuit

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

Refer to wiring diagram in "WIRING DIAGRAM - KEYLES -  ".

OK or NG 

1. OK : GO TO 3.
2. NG : Check the following. 
   • 10A fuse [No. 1, located in fuse block (J/B)]
   • Harness for open or short between smart entrance control unit and fuse

Check continuity between smart entrance control unit harness connector M144 terminals 43 (B) or M145 terminal 64 (B) and ground.

Fig 3: Checking Ground Circuit For Smart Entrance Control Unit

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

Refer to wiring diagram in "WIRING DIAGRAM - KEYLES -  ".

OK or NG 

1. OK : Power supply and ground circuits are OK.
2. NG : Check ground harness.