Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect rubber tube connected to EVAP canister vent control valve.
3. Check the rubber tube for clogging.

Is the inspection result normal? 

YES: GO TO 2.

NO: Clean rubber tube using an air blower.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 3.

NO: Replace EVAP canister vent control valve.

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Check if water will drain from the EVAP canister.

Does water drain from EVAP canister? 

YES: GO TO 4.

NO: GO TO  6.

Fig 1: Identifying EVAP Canister Vent Control Valve

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

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

The weight should be less than 1.9 kg (4.2 lb). 

Is the inspection result normal? 

YES: GO TO  6.

NO: GO TO 5.

Check the following.

• EVAP canister for damage
• EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

Repair hose or replace EVAP canister.

1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.

Water should not exist. 

Is the inspection result normal? 

YES: GO TO 7.

NO: Replace EVAP control system pressure sensor.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 8.

NO: Replace EVAP control system pressure sensor.

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END