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Home >> Infiniti >> 2004 >> Q45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P0441: EVAP Control System >> Diagnostic Procedure >> 2. Check Purge Flow
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2. Check Purge Flow

With CONSULT-II 

  1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge.
    Fig 1: Locating EVAP Service Port
    G00760910Courtesy of NISSAN MOTOR CO., U.S.A.
  2. Start engine and let it idle.
  3. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-II.
  4. Rev engine up to 2,000 RPM.
  5. Touch "Qd" and "Qu" on CONSULT-II screen to adjust "PURG VOL CONT/V" opening and check vacuum existence.
Fig 2: Checking PURG VOL CONT/V (1 Of 2)
G00760911Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 3: Checking PURG VOL CONT/V (1 Of 2)
G00760912Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

OK : GO TO 7. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE .

NG : GO TO 4. CHECK EVAP PURGE LINE .