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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 117 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (2 Of 3)) >> DTC/Circuit Diagnosis >> DTC P0443: EVAP Canister Purge Volume Control Solenoid Valve >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. 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

    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
      F16 1 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Perform the trouble diagnosis for power supply circuit.

  2. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT

    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
      F16 2 F78 54 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

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

  3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

    1. Disconnect EVAP control system pressure sensor harness connector.
    2. Check that water is not inside connectors.

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Replace EVAP control system pressure sensor. Refer to REMOVAL AND INSTALLATION .

  4. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

    Check EVAP control system pressure sensor. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES-1 

    With CONSULT: GO TO STEP 5  .

    YES-2 

    Without CONSULT: GO TO STEP 6  .

    NO 

    Replace EVAP control system pressure sensor. Refer to REMOVAL AND INSTALLATION .

  5. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

    G-20With CONSULT 

    1. Turn ignition switch OFF.
    2. Reconnect harness connectors disconnected.
    3. Start engine.
    4. Perform "PURG VOL C/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 STEP 7. 

    NO 

    GO TO STEP 6  .

  6. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

    Check EVAP canister purge volume control solenoid valve. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Replace EVAP canister purge volume control solenoid valve. Refer to COMPONENT PARTS LOCATION .

  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 STEP 8  .

    NO 

    Clean the rubber tube using an air blower.

  8. CHECK EVAP CANISTER VENT CONTROL VALVE

    Check EVAP canister vent control valve. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 9  .

    NO 

    Replace EVAP canister vent control valve. Refer to REMOVAL AND INSTALLATION .

  9. CHECK IF EVAP CANISTER IS SATURATED WITH WATER

    Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached. Refer to REMOVAL AND INSTALLATION .

    G05889648Courtesy of NISSAN NORTH AMERICA, INC.

    Does water drain from the EVAP canister?

    YES 

    GO TO STEP 10  .

    NO 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

  10. CHECK EVAP CANISTER

    Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

    The weight should be less than 2.1 kg (4.6 lb). 

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    GO TO STEP 11  .

  11. DETECT MALFUNCTIONING PART

    Check the following.

    • EVAP canister for damage
    • EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

    Repair hose or replace EVAP canister. Refer to REMOVAL AND INSTALLATION .

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