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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Control System (DTC/Circuit Diagnosis) (5.6L) (1 Of 6)) >> DTC/Circuit Diagnosis >> DTC P0102: MAF Sensor >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK THE DTC 

    If P0102 and P0113 are detected at the same time, check power supply and ground circuit of the MAF sensor.

    Is applicable DTC detected?

    YES

    Perform the diagnosis for power supply and ground circuit of the mass air flow sensor. GO TO 4.

    NO

    GO TO 2.

  2. CHECK HARNESS CONNECTOR 
    1. Disconnect mass air flow sensor harness connector and ECM harness connector.
    2. Connect mass air flow sensor harness connector and ECM harness connector.
    3. Perform DTC confirmation procedure. Refer to DTC Confirmation Procedure .

    Is DTC detected?

    YES

    GO TO 3.

    YES

    GO TO 4.

    NO

    INSPECTION END

  3. CHECK INTAKE SYSTEM 

    Check the following for connection.

    • Air duct
    • Vacuum hoses
    • Intake air passage between air duct to intake manifold

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Reconnect the parts.

  4. CHECK MAF SENSOR POWER SUPPLY CIRCUIT 
    1. Disconnect mass air flow (MAF) sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between MAF sensor harness connector and ground.

      MAF sensor

      Ground

      Voltage

      Connector

      Terminal

      F73

      5

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    GO TO 5.

  5. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness for open or short between mass air flow sensor and ECM
    • Harness for open or short between mass air flow sensor and IPDM E/R
    • Loose or poor connection for each connector and harness

    Repair open circuit, short to ground or short to power in harness or connectors.

  6. CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between MAF sensor harness connector and ECM harness connector.

      MAF sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F73

      4

      F78

      42

      Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    Repair open circuit, short to ground or short to power in harness or connectors.

  7. CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check the continuity between MAF sensor harness connector and ECM harness connector.

      MAF sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F73

      3

      F78

      37

      Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    Repair open circuit, short to ground or short to power in harness or connectors.

  8. CHECK MASS AIR FLOW SENSOR 

    Refer to Component Inspection (MAF Sensor) .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace mass air flow sensor. Refer to Exploded View .

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