Check Door Unlock Sensor

WARNING: This page is about a different car, the 2003 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.
1. When door is locked : LOCK SIG LOCK
2. 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?

OK >> Door unlock sensor is OK.

NG >> GO TO 2.

Fig 1: Display Data Monitor Sheet With Consult-II
Courtesy of NISSAN MOTOR CO., U.S.A.
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 2: Identifying Door Unlock Sensor Input Signal Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG?

OK >> GO TO 3.

NG >> Replace malfunctioning door control unit.

Fig 3: Checking Voltage Between Each Door Control Unit And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
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 4: Identifying Door Unlock Sensor Signal Circuit Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Continuity Between Door Control Unit And Door Lock Actuator
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check continuity between door control unit and ground.
  
  Fig 6: Identifying Continuity Between Door Control Unit And Ground Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 7: Checking Continuity Between Door Control Unit And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG?

OK >> GO TO 4.

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 8: Identifying Door Unlock Sensor Ground Circuit Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 9: Checking Voltage Between Each Door Control Unit And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK >> Replace door lock actuator (door unlock sensor).

NG >> Repair or replace malfunctioning harness.