Without Consult

WARNING: This page is about a different car, the 2012 Infiniti G25. However, it is still accessible from the selected car via links, so may be relevant.

To locate the EVAP leak, install EVAP service port adapter (commercial service tool) and pressure pump to EVAP service port.
Apply battery voltage between the terminals of EVAP canister vent control valve to make a closed EVAP system.
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).
Remove EVAP service port adapter (commercial service tool) and hose with pressure pump.

Fig 1: Installing EVAP Service Port Adapter And Pressure Pump To EVAP Service Port
Courtesy of NISSAN NORTH AMERICA, INC.
Locate the leak using a leak detector (commercial service tool). Refer to "SYSTEM DIAGRAM ".

Fig 2: Identifying EVAP Leak Detector
Courtesy of NISSAN NORTH AMERICA, INC.