Optical Sensor System Inspection
WARNING: This page is about a different car, the 2005 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
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.
- Illuminated
- CHECK OPTICAL SENSOR SIGNAL GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect BCM connectors and optical sensor connector.
- Check continuity (open circuit) between BCM harness connector M18 terminal 18 (P) and optical sensor harness connector M402 terminal 3 (P).
- 18 (P) - 3 (P): Continuity should exist.
- Check continuity (short circuit) between BCM harness connector M18 terminal 18 (P) and ground.
- 18 (P) - Ground: Continuity should not exist.
OK or NG
- OK: GO TO 3.
- NG: Repair harness or connector.
- CHECK OPTICAL SENSOR SIGNAL CIRCUIT
- Check continuity (open circuit) between BCM harness connector M20 terminal 58 (W/R) and optical sensor harness connector M402 terminal 4 (W/R).
- 58 (W/R) - 4 (W/R): Continuity should exist.
- Check continuity (short circuit) between BCM harness connector M20 terminal 58 (W/R) and ground.
- 58 (W/R) - Ground: Continuity should not exist.
OK or NG
- OK: Replace optical sensor. Refer to "REMOVAL AND INSTALLATION OF OPTICAL SENSOR ". Recheck sensor output with CONSULT-II. If NG, replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
- NG: Repair harness or connector.
- Check continuity (open circuit) between BCM harness connector M20 terminal 58 (W/R) and optical sensor harness connector M402 terminal 4 (W/R).