WARNING: This page is about a different car, the 2004 Nissan Murano. 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 "HEAD LAMP" data monitor, make sure "OPTICAL SENSOR", check difference in the voltage when the auto light 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 securely subjected to work lamp light. If the optical sensor is insufficiently illuminated, the measured value may not satisfy the standard.

Fig 1: Displaying DATA MONITOR
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

GO TO 2.

OK or NG
1. OK: INSPECTION END
2. NG: 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 M34 terminal 17 (BR/Y) and optical sensor harness connector M16 terminal 1 (BR/Y).
  17 (BR/Y) - 1 (BR/Y): Continuity should exist
4. Check continuity (short circuit) between BCM harness connector M34 terminal 17 (BR/Y) and ground.
  17 (BR/Y) - Ground: Continuity should not exist.
  
  Fig 2: Checking Continuity Between BCM Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Repair harness or connector.
CHECK OPTICAL SENSOR SIGNAL CIRCUIT
1. Check continuity (open circuit) between BCM harness connector M34 terminal 14 (W) and optical sensor harness connector M16 terminal 2 (W).
  14 (W) - 2 (W): Continuity should exist.
2. Check continuity (short circuit) between BCM harness connector M34 terminal 14 (W) and ground.
  14 (W) - Ground: Continuity should not exist.
  
  Fig 3: Checking Continuity Between BCM Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG: Repair harness or connector.
CHECK OPTICAL SENSOR GROUND CIRCUIT
1. Check continuity (open circuit) between BCM harness connector M34 terminal 18 (P) and optical sensor harness connector M16 terminal 3 (P).
  18 (P) - 3 (P): Continuity should exist.
2. Check continuity (short circuit) between BCM harness connector M34 terminal 18 (P) and ground.
  18 (P) - Ground: Continuity should not exist.
  
  Fig 4: Checking Continuity Between BCM Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 5.
2. NG: Repair harness or connector.
CHECK OPTICAL SENSOR VOLTAGE
1. Connect BCM connector.
2. Turn ignition switch ON.
3. Check voltage between BCM harness connector M34 terminal 17 (BR/Y) and ground.
  17 (BR/Y) - Ground: Approx. 5V should exist.
OK or NG
1. OK: Replace the optical sensor.
2. NG: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
  
  Fig 5: Checking Voltage Between BCM Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Optical sensor System Inspection

Use the Manual With the Right Hardware

When to See a Mechanic

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