Check Door Unlock Sensor

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 Door Unlock Sensor Input Signal
With CONSULT-II

Check door unlock sensor "LOCK SIG" in "DATA MONITOR" mode with CONSULT-II.

When door is locked: LOCK SIG LOCK

When door is unlocked: LOCK SIG UNLK

Without CONSULT-II

Check door lock knob operation in Switch monitor mode.

Refer to Remote keyless entry system, SWITCH MONITOR .

OK or NG
1. OK: Door unlock sensor is Ok.
2. NG: GO TO 2.
Check Door Unlock Sensor Input Signal
1. Turn ignition switch OFF.
2. Disconnect door lock actuator connector.
3. Check voltage between each door control unit and ground.
  
  Fig 1: Checking Door Unlock Sensor Input Signal (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Door Unlock Sensor Input Signal (2 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Replace malfunctioning door control unit.
Check Door Unlock Sensor Signal Circuit
1. Disconnect door control unit connector.
2. Check continuity between door control unit and door lock actuator (door unlock sensor).
  
  Fig 3: Checking Continuity Between Door Control Unit & Door Lock Actuator (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 4: Checking Continuity Between Door Control Unit & Door Lock Actuator (2 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check continuity between door control unit and ground.
  
  Fig 5: Checking Continuity Between Door Control Unit & Ground (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 6: Checking Continuity Between Door Control Unit & Ground (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG: Repair or replace malfunctioning harness.
Check Door Unlock Sensor Ground Circuit
1. Turn ignition switch OFF.
2. Disconnect door lock actuator connector.
3. Check voltage between each door control unit and ground.
  
  Fig 7: Checking Door Unlock Sensor Ground Circuit (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 8: Checking Door Unlock Sensor Ground Circuit (2 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace door lock actuator (door unlock sensor).
2. NG: Repair or replace malfunctioning harness.