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Home >> Infiniti >> 2004 >> QX56 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1203 (Engine Control System) >> Evaporative Emission System >> How to Detect Fuel Vapor Leakage >> Without Consult-II

Without Consult-II

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
  1. Attach the EVAP service port adapter securely to the EVAP service port.
    Fig 1: Checking Leakage In EVAP System
    G02384741Courtesy of NISSAN MOTOR CO., U.S.A.
  2. Also attach the pressure pump with pressure gauge to the EVAP service port adapter.
    Fig 2: Attaching Pressure Pump With Pressure Gauge To EVAP Service Port Adapter
    G02384742Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Apply battery voltage between the terminals of EVAP canister vent control valve to make a closed EVAP system.
    Fig 3: Identifying EVAP Canister System
    G02384743Courtesy of NISSAN MOTOR CO., U.S.A.
  4. To locate the leak, deliver positive pressure to the EVAP system until pressure gauge points reach 1.38 to 2.76 kPa (0.014 to 0.028 kg/cm2 , 0.2 to 0.4 psi).
  5. Remove EVAP service port adapter and hose with pressure pump.
  6. Locate the leak using a leak detector. Refer to "EVAPORATIVE EMISSION LINE DRAWING ".