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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 P0441: EVAP Control System >> 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

    1. Turn ignition switch OFF.
    2. Check EVAP canister for cracks.

    Is the inspection result normal?

    YES-1 

    With CONSULT: GO TO STEP 2  .

    YES-2 

    Without CONSULT: GO TO STEP 3  .

    NO 

    Replace EVAP canister. Refer to REMOVAL AND INSTALLATION .

  2. CHECK PURGE FLOW

    G-20With CONSULT 

    1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge. For the location of EVAP service port, refer to SYSTEM DESCRIPTION .
    2. Start engine and let it idle.
    3. Select "PURG VOL C/V" in "ACTIVE TEST" mode with CONSULT.
    4. Touch "Qd" and "Qu" on CONSULT screen to adjust "PURG VOL C/V" opening and check vacuum existence.
      PURG VOL C/V Vacuum
      100% Existed
      0% Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP   7  .

    NO 

    GO TO STEP 4  .

  3. CHECK PURGE FLOW

    G-21Without CONSULT 

    1. Start engine and warm it up to normal operating temperature.
    2. Stop engine.
    3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge. For the location of EVAP service port, refer to SYSTEM DESCRIPTION .
    4. Start engine and let it idle.

      Do not depress accelerator pedal even slightly. 

    5. Check vacuum gauge indication before 60 seconds pass after starting engine.
      Vacuum should not exist.
    6. Rev engine up to 2, 000 RPM after 100 seconds pass after starting engine.
      Vacuum should exist.

    Is the inspection result normal?

    YES 

    GO TO STEP   7  .

    NO 

    GO TO STEP 4  .

  4. CHECK EVAP PURGE LINE

    1. Turn ignition switch OFF.
    2. Check EVAP purge line for improper connection or disconnection.

      Refer to SYSTEM DESCRIPTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair EVAP purge line.

  5. CHECK EVAP PURGE HOSE AND PURGE PORT

    1. Disconnect purge hoses connected to EVAP service port A  and EVAP canister purge volume control solenoid valve B  .
      G04074089Courtesy of NISSAN NORTH AMERICA, INC.
    2. Blow air into each hose and EVAP purge port C  .
    3. Check that air flows freely.
      G04074090Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES-1 

    With CONSULT: GO TO STEP 6  .

    YES-2 

    Without CONSULT: GO TO STEP 7  .

    NO 

    Repair or clean hoses and/or purge port.

  6. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

    G-20With CONSULT 

    1. Start engine.
    2. 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 8  .

    NO 

    GO TO STEP 7  .

  7. 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 8  .

    NO 

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

  8. 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 9  .

    NO 

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

  9. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION

    Check EVAP control system pressure sensor function. Refer to DTC LOGIC  for DTC P0452, DTC LOGIC  for DTC P0453.

    Is the inspection result normal?

    YES 

    GO TO STEP 10  .

    NO 

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

  10. 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 11  .

    NO 

    Clean the rubber tube using an air blower.

  11. 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 12  .

    NO 

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

  12. CHECK EVAP PURGE LINE

    Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leakage.

    Refer to SYSTEM DESCRIPTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 13  .

    NO 

    Repair EVAP purge line.

  13. CLEAN EVAP PURGE LINE

    Clean EVAP purge line (pipe and rubber tube) using air blower.

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

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