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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 P0444: EVAP Canister Purge Volume Control Solenoid Valve >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between EVAP canister purge volume control solenoid valve harness connector and ground.

      EVAP canister purge volume control solenoid valve

      Ground

      Voltage

      Connector

      Terminal

      F30

      1

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 2.

  2. DETECT MALFUNCTIONING PART 

    Check the following.

    • Loose or poor connection for each connector and harness
    • Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
    • Harness for open or short between EVAP canister purge volume control solenoid valve and ECM

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

  3. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 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 purge volume control solenoid valve harness connector and ECM harness connector.

      EVAP canister purge volume control solenoid valve

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F30

      2

      F79

      106

      Existed

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

    Is the inspection result normal?

    YES

    With CONSULT: GO TO 4.

    YES

    Without CONSULT: GO TO 5.

    NO

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

  4. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION 

    SYMBOL WITH CONSULT

    1. Reconnect all harness connectors disconnected.
    2. Start engine.
    3. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT. Check that engine speed varies according to the valve opening.

    Does engine speed vary according to the valve opening?

    YES

    INSPECTION END

    NO

    GO TO 5.

  5. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE 

    Refer to Component Inspection (EVAP Canister Purge Volume Control Solenoid Valve) .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace EVAP canister purge volume control solenoid valve.