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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Control System (DTC/Circuit Diagnosis) (5.6L) (4 Of 6)) >> DTC/Circuit Diagnosis >> DTC P0447: EVAP Canister Vent Control Valve >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. INSPECTION START 

    Will CONSULT be used?

    Will CONSULT be used?

    YES

    GO TO 2.

    NO

    GO TO 3.

  2. CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT 

    SYMBOL WITH CONSULT

    1. Turn ignition switch OFF and then ON.
    2. Select "VENT CONTROL/V" in "ACTIVE TEST" mode with CONSULT.
    3. Touch "ON/OFF" on CONSULT screen.
    4. Check for operating sound of the valve.

      Clicking sound should be heard.

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    GO TO 3.

  3. CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect EVAP canister vent control valve harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between EVAP canister vent control valve harness connector and ground.

      EVAP canister vent control valve

      Ground

      Voltage

      Connector

      Terminal

      C38

      1

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    GO TO 4.

  4. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness for open or short between EVAP canister vent control valve 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.

  5. CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between EVAP canister vent control valve harness connector and ECM harness connector.

      EVAP canister vent control valve

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      C38

      2

      E77

      141

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

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    GO TO 6.

  6. DETECT MALFUNCTIONING PART 

    Check the following.

    • Loose or poor connection for each connector and harness
    • Harness for open or short between EVAP canister vent control valve and ECM

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

  7. CHECK RUBBER TUBE FOR CLOGGING 
    1. Disconnect rubber tube connected to EVAP canister vent control valve.
    2. Check the rubber tube for clogging.

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    Clean the rubber tube using an air blower.

  8. CHECK EVAP CANISTER VENT CONTROL VALVE 

    Refer to Component Inspection (EVAP Canister Vent Control Valve) .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace EVAP canister vent control valve. Refer to Removal and Installation .

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