Optical sensor System Inspection

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OPTICAL SENSOR INPUT SIGNAL
With CONSULT-II

Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor, make sure "OPTICAL SENSOR", check difference in voltage when the optical sensor is illuminated and not illuminated.

Illuminated

OPTICAL SENSOR: 3.1 V or more

Not illuminated

OPTICAL SENSOR: 0.6V or less

Fig 1: Locating Data Monitor Display Screen
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.

Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector M1 terminal 14 (Y/PU) and ground.
  Illuminated
  
  OPTICAL SENSOR: 3.1V or more
  
  Not illuminated
  
  OPTICAL SENSOR: 0.6V 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.
  
  Fig 2: Checking Voltage Between BCM Harness Connector M1 Terminal 14 (Y/Pu) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: INSPECTION END
2. 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 M1 terminal 17 (P) and optical sensor harness connector M63 terminal 1 (P).
  17 (P) - 1 (P): Continuity should exist.
4. Check continuity (short circuit) between BCM harness connector M3 terminal 17 (P) and ground.
  17 (P) - Ground: Continuity should not exist.
OK or NG
1. OK: GO TO 3.
2. NG: Repair harness or connector.
  
  Fig 3: Checking Continuity (Open Circuit) Between BCM Harness Connector M1 Terminal 17 (P) And Optical Sensor Harness Connector M63 Terminal 1 (P)
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK OPTICAL SENSOR SIGNAL CIRCUIT
1. Check continuity (open circuit) between BCM harness connector M1 terminal 14 (Y/PU) and optical sensor harness connector M63 terminal 2 (Y/PU).
  14 (Y/PU) - 2 (Y/PU): Continuity should exist.
2. Check continuity (short circuit) between BCM harness connector M1 terminal 14 (Y/PU) and ground.
  14 (Y/PU) - Ground: Continuity should not exist.
OK or NG
1. OK: GO TO 4.
2. NG: Repair harness or connector.
  
  Fig 4: Checking Continuity (Short Circuit) Between BCM Harness Connector M1 Terminal 14 (Y/PU) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK OPTICAL SENSOR GROUND CIRCUIT
1. Check continuity (open circuit) between BCM harness connector M1 terminal 18 (B) and optical sensor harness connector M63 terminal 3 (B).
  18 (B) - 3 (B): Continuity should exist.
2. Check continuity (short circuit) between BCM harness connector M1 terminal 18 (B) and ground.
  18 (B) - Ground: Continuity should not exist.
OK or NG
1. OK: GO TO 5.
2. NG: Repair harness or connector
  
  Fig 5: Checking Continuity (Short Circuit) Between BCM Harness Connector M1 Terminal 18 (B) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK OPTICAL SENSOR VOLTAGE
1. Connect BCM connector.
2. Turn ignition switch ON.
3. Check voltage between BCM harness connector M1 terminal 17 (P) and ground.
  17 (P) - Ground: Approx. 5V
OK or NG
1. OK: Replace optical sensor.
2. NG: Replace BCM. Refer to REMOVAL AND INSTALLATION OF BCM .
  
  Fig 6: Checking Voltage Between BCM Harness Connector M1 Terminal 17 (P) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.