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Home >> Nissan-Datsun >> 2010 >> Cube Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0181 To P0607 >> P0447 EVAP Canister Vent Control Valve >> Diagnosis Procedure

Diagnosis Procedure

  1. INSPECTION START

    Do you have CONSULT-III?

    Do you have CONSULT-III? 

    YES: GO TO 2.

    NO: GO TO  3.

  2. CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT

    With CONSULT-III 

    1. Turn ignition switch OFF and then turn ON.
    2. Select "VENT CONTROL/V" in "ACTIVE TEST" mode with CONSULT-III.
    3. Touch "ON/OFF" on CONSULT-III 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.
    TERMINAL VOLTAGE REFERENCE CHART

    EVAP canister vent control valve Ground Voltage
    Connector Terminal
    B20 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 connectors E8, F1
    • Harness connectors E105, M77
    • Harness connectors M79, B4
    • Harness for open or short between EVAP canister vent control valve and IPDM E/R

    Repair open circuit or 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.
      TERMINAL CONTINUITY REFERENCE CHART

      EVAP canister vent control valve ECM Continuity
      Connector Terminal Connector Terminal
      B20 2 F7 28 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.

    • Junction block connector E8, F1
    • Harness connectors E105, M77
    • Harness connectors M79, B4
    • Harness for open or short between EVAP canister vent control valve and ECM

    Repair open circuit or 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 ".

    Is the inspection result normal? 

    YES: GO TO 9.

    NO: Replace EVAP canister vent control valve.

  9. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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