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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Control System (DTC/Circuit Diagnosis) (Pr25DD) (2 Of 4)) >> DTC/Circuit Diagnosis >> DTC P0447: EVAP Canister Vent Control Valve >> DTC Diagnosis Procedure >> PR25DD engine

PR25DD engine

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

    Do you have CONSULT?

    Do you have CONSULT?

    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 turn ON.
    2. Select "VENT CONTROL/V" in "ACTIVE TEST" mode of "ENGINE" using 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 
    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.

      +

      -

      Voltage

      EVAP canister vent control valve

      Connector

      Terminal

      B55

      1

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    GO TO 4.

  4. CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between EVAP canister vent control valve harness connector and IPDM E/R harness connector.

      +

      -

      Continuity

      EVAP canister vent control valve

      IPDM E/R

      Connector

      Terminal

      Connector

      Terminal

      B55

      1

      E17

      8

      Existed
    4. Also check harness for short to ground.

    Is the inspection result normal?

    YES

    Perform the trouble diagnosis for power supply circuit.

    NO

    Repair or replace error-detected parts.

  5. CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT 
    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.

      +

      -

      Continuity

      EVAP canister vent control valve

      ECM

      Connector

      Terminal

      Connector

      Terminal

      B55

      2

      E31

      151

      Existed
    4. Also check harness for short to power.

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace error-detected parts.

  6. 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 7.

    NO

    Clean the rubber tube using an air blower.

  7. CHECK EVAP CANISTER VENT CONTROL VALVE 

    Check the EVAP canister vent control valve. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Inspection .

    NO

    Replace EVAP canister vent control valve. Refer to Removal and Installation (AWD) or Removal and Installation (FWD).

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