Optical Sensor System Inspection

WARNING: This page is about a different car, the 2006 Nissan Quest. 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 Display Screen - DATA MONITOR
Courtesy of NISSAN MOTOR CO., U.S.A.

CAUTION: 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 connector 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.
  
  Fig 2: Identifying Continuity Between BCM And Optical Sensor Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity (short circuit) between BCM harness connector M18 terminal 18 and ground.
  18 - 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 M19 terminal 43 and optical sensor harness connector M402 terminal 4.
  43 - 4: Continuity should exist.
2. Check continuity (short circuit) between BCM harness connector M19 terminal 43 and ground.
  
  Fig 3: Identifying Continuity Between BCM And Optical Sensor Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  43 - Ground: Continuity should not exist.
OK or NG

OK: Replace optical sensor. Refer to "OPTICAL SENSOR ". Recheck sensor output with CONSULT-II. If NG, replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".

NG: Repair harness or connector.