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Home >> Infiniti >> 2013 >> FX37 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Engine Control System - DTCS P0137 Through P0456) >> DTC P0444, P0445: EVAP Canister Purge Volume Control Solenoid Valve >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.
  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
      F7 1 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO  3.

      NO: GO TO 2.

  2. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E106, M6
    • Harness connectors M116, F103
    • 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
      F7 2 F110 8 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES-1: With CONSULT: GO TO 4.

      YES-2: 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 

    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: GO TO  6.

      NO: GO TO 5.

  5. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE 

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 6.

    NO: Replace EVAP canister purge volume control solenoid valve. Refer to "EXPLODED VIEW ".

  6. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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