Check Unlock Sensor

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK UNLOCK SENSOR POWER SUPPLY
Check voltage between Intelligent Key unit connector and ground.

Fig 1: Connector Terminal Reference Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK : Unlock sensor is OK.
2. NG : GO TO 2.
Fig 2: Checking Voltage Between Intelligent Key Unit Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK UNLOCK SENSOR CIRCUIT
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).
  1. 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 3: Checking Unlock Sensor Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK UNLOCK SENSOR GROUND CIRCUIT
Check continuity between front door lock assembly (driver side) connector D10 terminal 5 (B) and ground.
1. 5 (B) - Ground : Continuity should exist.
OK or NG
1. OK : GO TO 4.
2. NG : Repair or replace harness.
Fig 4: Checking Continuity Between Front Door Lock Assembly (Driver Side) Connector D10 Terminal 5 (B) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK INTELLIGENT KEY UNIT OUTPUT SIGNAL
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.
  1. 28 (W/B) - Ground : Approx. 5V
OK or NG
1. OK : Replace front door lock assembly (driver side).
2. NG : Replace Intelligent Key unit.
Fig 5: Checking Voltage Between Intelligent Key Unit Connector M34 Terminal 28 (W/B) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.