Optical Sensor System Inspection

WARNING: This page is about a different car, the 2006 Nissan Maxima. 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, make sure "OPTICAL SENSOR", check difference in the voltage when the optical sensor is illuminated and not illuminated.

Illuminated OPTICAL SENSOR: 3.1 V 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.

Fig 1: CONSULT II DATA MONITOR Screen
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Inspection End.

NG: GO TO 2.

Without CONSULT-II

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 M18 terminal 17 and optical sensor harness connector M15 terminal 1.
  17 - 1: Continuity should exist.
4. Check continuity (short circuit) between BCM harness connector M18 terminal 17 and ground.
  17 - Ground: Continuity should not exist.
OK or NG

OK: GO TO 3.

NG: Repair harness or connector.

Fig 2: Checking Continuity Between BCM Connector M18 And Optical Sensor Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT
1. Check continuity (open circuit) between BCM harness connector M18 terminal 14 and optical sensor harness connector M15 terminal 2.
  14 - 2: Continuity should exist.
2. Check continuity (short circuit) between BCM harness connector M18 terminal 14 and ground.
  14 - Ground: Continuity should not exist.
OK or NG

OK: GO TO 4.

NG: Repair harness or connector.

Fig 3: Checking Continuity Between BCM And Optical Sensor Connector Terminal And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT
1. Check continuity (open circuit) between BCM harness connector M18 terminal 18 and optical sensor harness connector M15 terminal 3.
  18 - 3: Continuity should exist.
2. 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 5.

NG: Repair harness or connector.

Fig 4: Checking Continuity Between BCM And Optical Sensor Connector Terminals And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK OPTICAL SENSOR VOLTAGE
1. Connect BCM connector.
2. Turn ignition switch ON.
3. Check voltage between BCM harness connector M18 terminal 17 and ground.
  17 - Ground: Approx. 5V should exist.
OK or NG

OK: Replace the optical sensor. Refer to "REMOVAL AND INSTALLATION ".

NG: Replace BCM. Refer to "BCM ".

Fig 5: Checking Voltage Between BCM Connector M18 Terminal 17 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.