How to Detect Fuel Vapor Leakage

WITH CONSULT-III 

1. Attach the EVAP service port adapter securely to the EVAP service port.
2. Also attach the pressure pump and hose to the EVAP service port adapter.
3. Turn ignition switch ON.
4. Select the "EVAP SYSTEM CLOSE" of "WORK SUPPORT MODE" with CONSULT-III.
5. Touch "START". A bar graph (Pressure indicating display) will appear on the screen.
6. Apply positive pressure to the EVAP system until the pressure indicator reaches the middle of the bar graph.
7. Remove EVAP service port adapter and hose with pressure pump.
8. Locate the leak using a leak detector. Refer to "EVAPORATIVE EMISSION LINE DRAWING ".
   Fig 1: Identifying EVAP Leak Detector

   Courtesy of NISSAN MOTOR CO., U.S.A.

WITHOUT CONSULT-III 

1. Attach the EVAP service port adapter securely to the EVAP service port.
   Fig 2: Identifying EVAP Service Port And Intake Manifold Collector

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Also attach the pressure pump with pressure gauge to the EVAP service port adapter.
   Fig 3: Attaching EVAP Service Port Adapter

   Courtesy 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 4: Identifying EVAP Canister Vent Control Valve

   Courtesy 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 ."