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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1165 (Engine Control System - Qr25DE) >> Evaporative Emission System >> How to Detect Fuel Vapor Leakage >> Without Consult-II

Without Consult-II

WARNING: This page is about a different car, the 2004 Nissan Sentra. 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.
  2. Also attach the pressure pump with pressure gauge to the EVAP service port adapter.
    Fig 1: Attaching Pressure Pump With Pressure Gauge To EVAP Service Port Adapter
    G00778411Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Apply battery voltage to between the terminals of both EVAP canister vent control valve and vacuum cut valve bypass valve to make a closed EVAP system.
    Fig 2: Identifying EVAP Canister & Components
    G00778412Courtesy 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 ".
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