Optical Sensor System Inspection

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

CHECK OPTICAL SENSOR INPUT SIGNAL
With CONSULT-III

Select "BCM" on CONSULT-III. 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

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-III

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 M16 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 1: Checking Continuity Between BCM Harness Connector M18 Terminal 18 And Optical Sensor Harness Connector M16 Terminal 3
  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 connector M20 (A) terminal 58 and optical sensor connector M16 (B) 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.
OK or NG

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

NG: Repair harness or connector.

Fig 2: Check Continuity Between BCM Connector M20 (A) Terminal 58 And Optical Sensor Connector M16 (B) Terminal 4, And Between Connector M20 Terminal 58 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.