With CONSULT-II

Remove EVAP canister vent control valve from EVAP canister.
Check portion B of EVAP canister vent control valve for being rusted.
If NG, replace EVAP canister vent control valve.

If OK, go to next step.
Reconnect all harness connectors disconnected.
Turn ignition switch ON.

Fig 1: Checking EVAP Canister Vent Control Valve
Courtesy of NISSAN MOTOR CO., U.S.A.
Perform "VENT CONTROL/V" in "ACTIVE TEST" mode.
Check air passage continuity and operation delay time.
Make sure new O-ring is installed properly.

Fig 2: Active Test Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Displaying Active Test Screen
Courtesy of NISSAN MOTOR CO., U.S.A.

If NG, replace EVAP canister vent control valve.

If OK, go to next step.
Clean the air passage (Portion A to B) of EVAP canister vent control valve using an air blower.
Perform step 6 again.