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Check Unlock Sensor

UNLOCK SENSOR POWER SUPPLY INSPECTION

Check voltage between Intelligent Key unit connector and ground.

INTELLIGENT KEY UNIT CONNECTOR AND GROUND VOLTAGE SPECIFICATIONS

Connector	Terminals (Wire color)		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
M34	28(W/B)	Ground	Driver side door lock is locked	5
M34	28(W/B)	Ground	Driver side door lock is unlocked	0

OK or NG

OK: Unlock sensor is OK.
NG: GO TO 2.

Fig 1: Inspecting Unlock Sensor Power Supply
Courtesy of NISSAN MOTOR CO., U.S.A.

2. UNLOCK SENSOR CIRCUIT INSPECTION
1. Turn ignition knob LOCK position.
2. Disconnect Intelligent Key unit and front door lock assembly (driver side) connector.
3. Check continuity between Intelligent Key unit connector M34 terminal 28 (W/B) and front door lock assembly (driver side) connector D10 terminal 4 (W).
  28 (W/B) - 4 (W): Continuity should exist.
OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace harness between Intelligent Key unit and front door lock assembly (driver side).
  
  Fig 2: Inspecting Unlock Sensor Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
UNLOCK SENSOR GROUND CIRCUIT INSPECTION
Check continuity between front door lock assembly (driver side) connector D10 terminal 5 (B) and ground.

5 (B) - Ground: Continuity should exist.

OK or NG
1. OK: GO TO 4.
2. NG: Repair or replace harness.
  
  Fig 3: Inspecting Unlock Sensor Ground Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
INTELLIGENT KEY UNIT OUTPUT SIGNAL INSPECTION
1. Connect Intelligent Key unit connector.
2. Driver side door lock is locked.
3. Check voltage between Intelligent Key unit connector M34 terminal 28 (W/B) and ground.
  28 (W/B) - Ground: Approx. 5V
OK or NG
1. OK: Check harness connection.
2. NG: Replace Intelligent Key unit.
  
  Fig 4: Inspecting Intelligent Key Unit Output Signal
  Courtesy of NISSAN MOTOR CO., U.S.A.