Optical Sensor System Inspection

WARNING: This page is about a different car, the 2004 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 the voltage when the auto light sensor is illuminated and not illuminated.

Illuminated

OPTICAL SENSOR: 3.1V or more

Not illuminated

OPTICAL SENSOR: 0.6V or less

Fig 1: Display CONSULT II (Data Monitor Screen) Optical Sensor Voltage
Courtesy of NISSAN MOTOR CO., U.S.A.

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

With out CONSULT-II

GO TO 2.

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).
  
  Fig 2: Checking Continuity Between BCM Harness Connector M1 Terminal 17 And Optical Sensor Harness Connector M63 Terminal 1
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  17 (P) - 1 (P): Continuity should exist .
4. Check continuity (short circuit) between BCM harness connector M1 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.
CHECK OPTICAL SENSOR POWER SUPPLY 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 .
  
  Fig 3: Checking Continuity Between BCM Harness Connector M1 Terminal 14 And Optical Sensor Harness Connector M63 Terminal 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check continuity (short circuit) between BCM harness connector M63 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.
CHECK OPTICAL SENSOR POWER SUPPLY 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 .
  
  Fig 4: Checking Continuity Between BCM Harness Connector M1 Terminal 18 And Optical Sensor Harness Connector M63 Terminal 3
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check continuity (short circuit) between BCM harness connector M63 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.
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 should exist .
  
  Fig 5: Checking Voltage Between BCM Harness Connector M1 Terminal 17 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace the optical sensor.
2. NG: Replace BCM. Refer to REMOVAL AND INSTALLATION OF BCM .