Auto Light Sensor System Inspection

WARNING: This page is about a different car, the 2005 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

OUTPUT SIGNAL INSPECTION
With CONSULT-II

Select "BCM" in CONSULT-II. Using "OPTICAL SENSOR" data from "DATA MONITOR", check difference in the voltage when the auto light sensor is illuminated and not illuminated.

Light sensor illuminated: 3.1V or more

Light sensor not illuminated: 0.6V or less

NOTE: If the auto light 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.
Fig 1: Identifying Scan Tools Display (Data Monitor)
Courtesy of NISSAN MOTOR CO., U.S.A.
POWER SUPPLY CIRCUIT CONTINUITY INSPECTION
1. Disconnect BCM and auto light sensor connectors.
2. Check continuity between BCM harness connector M18 terminal 17 (R) and auto light sensor harness connector M15 terminal 1 (R).
  17 (R) -1 (R): Continuity should exist.
3. Check continuity between BCM harness connector M18 terminal 17 (R) and ground.
  17 (R) - Ground: Continuity should not exist.
OK or NG
- OK: GO TO 3.
- NG: Repair harness or connector.
Fig 2: Checking Continuity Between BCM Harness Connector M18 Terminal 17 (R) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
OUTPUT CIRCUIT CONTINUITY INSPECTION
1. Check continuity between BCM harness connector M18 terminal 14 (W/R) and auto light sensor harness connector M15 terminal 2 (W/R).
  14 (W/R): Continuity should exist.
2. Check continuity between BCM harness connector M18 terminal 14 (W/R) and ground.
  14 (W/R) - Ground: Continuity should not exist.
OK or NG
- OK: GO TO 4.
- NG: Repair harness or connector.
Fig 3: Checking Continuity Between BCM Harness Connector M18 Terminal 14 (W/R) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
GROUND CIRCUIT CONTINUITY INSPECTION
1. Check continuity between BCM harness connector M18 terminal 18 (P) and auto light sensor harness connector M15 terminal 3 (P).
  18 (P) - 3 (P): Continuity should exist.
2. Check continuity between BCM harness connector M18 terminal 18 (P) and ground.
  18 (P) - Ground: Continuity should not exist.
OK or NG
- OK: GO TO 5.
- NG: Repair harness or connector.
Fig 4: Checking Continuity Between BCM Harness Connector M18 Terminal 18 (P) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
SENSOR VOLTAGE INSPECTION
1. Connect BCM connector.
2. Check voltage between BCM harness connector M18 terminal 17 (R) and ground.
  17 (R) - Ground: Should be approx. 5V.
OK or NG
- OK: Replace the auto light sensor.
- NG: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
Fig 5: Checking Voltage Between BCM Harness Connector M18 Terminal 17 (R) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.