Optical Sensor System Inspection

WARNING: This page is about a different car, the 2006 Infiniti QX56. 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 "OPTICAL SENSOR" data monitor, check difference in the voltage when the optical sensor is illuminated and not illuminated.

Illuminated

OPTICAL SENSOR : 3.1V or more

Not illuminated

OPTICAL SENSOR : 0.6V or less

Fig 1: Consult-II Screen Display - Data Monitor
Courtesy of NISSAN MOTOR CO., U.S.A.

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

Without CONSULT-II

GO TO 2.

OK or NG
- OK : Inspection End.
- NG : GO TO 2.
CHECK OPTICAL SENSOR SIGNAL GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connectors and optical sensor connector.
3. Check continuity (open circuit) between BCM harness connector M18 terminal 18 and optical sensor harness connector M402 terminal 3.
  18 - 3 : Continuity should exist.
4. Check continuity (short circuit) between BCM harness connector M18 terminal 18 and ground.
  18 - Ground : Continuity should not exist.
  
  Fig 2: Identifying Continuity Between BCM Harness Connector M18 Terminal 18 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 M20 terminal 58 and optical sensor harness connector M402 terminal 4.
  58 - 4 : Continuity should exist.
2. Check continuity (short circuit) between BCM harness connector M20 terminal 58 and ground.
  58 - Ground : Continuity should not exist.
  
  Fig 3: Identifying Continuity Between BCM Harness Connector M20 Terminal 58 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK : Replace optical sensor. Refer to "OPTICAL SENSOR ". Recheck sensor output with CONSULT-II. If NG, replace BCM. Refer to "BCM ".
- NG : Repair harness or connector.