Optical sensor System Inspection

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OPTICAL SENSOR INPUT SIGNAL
CONSULT-III DATA MONITOR
1. Turn ignition switch ON.
2. Select "OPTICAL SENSOR" of BCM (HEAD LAMP) data monitor item.
3. Turn the lighting switch AUTO.
4. With the optical sensor illuminating, check the monitor status.
Illuminated

OPTICAL SENSOR : 3.1 V or more

Not illuminated

OPTICAL SENSOR : 0.6 V or less

CAUTION: Optical sensor must be securely subjected to work lamp light. If optical sensor is insufficiently illuminated, the measured value may not satisfy the standard.

CHECK BCM
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector M3 terminal 14 and ground.
  Illuminated
  
  OPTICAL SENSOR : 3.1 V or more
  
  Not illuminated
  
  OPTICAL SENSOR : 0.6 V or less
  
  Fig 1: Identifying Voltage Between BCM Harness Connector Terminal 14 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  CAUTION: Optical sensor must be securely subjected to work lamp light. If optical sensor is insufficiently illuminated, the measured value may not satisfy the standard.
  
  OK or NG
  
  OK: INSPECTION END
  
  NG: GO TO 2.
CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and optical sensor connector.
3. Check continuity (open circuit) between BCM harness connector M3 terminal 17 and optical sensor harness connector M37 terminal 1.
  17 - 1 : Continuity should exist.
  
  Fig 2: Identifying Continuity (Short Circuit) Between BCM Harness Connector Terminal 17 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity (short circuit) between BCM harness connector M3 terminal 17 and ground.
  17 - Ground : Continuity should not exist.
  
  OK or NG
  
  OK: GO TO 3.
  
  NG: Repair harness or connector.
CHECK OPTICAL SENSOR SIGNAL CIRCUIT
1. Check continuity (open circuit) between BCM harness connector M3 terminal 14 and optical sensor harness connector M37 terminal 2.
  14 - 2 : Continuity should exist.
2. Check continuity (short circuit) between BCM harness connector M3 terminal 14 and ground.
  14 - Ground : Continuity should not exist.
  
  Fig 3: Identifying Continuity (Short Circuit) Between BCM Harness Connector Terminal 14 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
  
  OK: GO TO 4.
  
  NG: Repair harness or connector.
CHECK OPTICAL SENSOR GROUND CIRCUIT
1. Check continuity (open circuit) between BCM harness connector M3 terminal 18 and optical sensor harness connector M37 terminal 3.
  18 - 3 : Continuity should exist.
2. Check continuity (short circuit) between BCM harness connector M3 terminal 18 and ground.
  18 - Ground : Continuity should not exist.
  
  Fig 4: Checking Optical Sensor Ground Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
  
  OK: GO TO 5.
  
  NG: Repair harness or connector.
CHECK OPTICAL SENSOR VOLTAGE
1. Connect BCM connector.
2. Turn ignition switch ON.
3. Check voltage between BCM harness connector M3 terminal 17 and ground.
  17 - Ground : Approx. 5 V
  
  Fig 5: Identifying Voltage Between BCM Connector Terminal 17 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
  
  OK: Replace optical sensor.
  
  NG: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".