Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect rubber tube connected to EVAP canister vent control valve (3).
   • Fuel filler pipe (top of frame view) (1)
   • EVAP control system pressure sensor (2)
   • EVAP canister (4)
   • Drain filter (5)
   • : Vehicle front
3. Check the rubber tube for clogging.

OK or NG 

OK: GO TO 2.

NG: Clean rubber tube using an air blower.

Fig 1: Identifying Fuel Filler Pipe, EVAP Control System Pressure Sensor, EVAP Canister Vent Control Valve, EVAP Canister And Drain Filter

Courtesy of NISSAN NORTH AMERICA, INC.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 3.

NG: Replace drain filter. Refer to "DESCRIPTION ".

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 4.

NG: Replace EVAP canister vent control valve. Refer to "REMOVAL AND INSTALLATION ".

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached. Refer to "REMOVAL AND INSTALLATION ".
2. Check if water will drain from the EVAP canister.

Yes or No 

Yes: GO TO 5.

No: GO TO  7.

Fig 2: Checking EVAP Canister Vent Control Valve For Water

Courtesy of NISSAN NORTH AMERICA, INC.

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

The weight should be less than 2.0 kg (4.4 lb)  .

OK or NG 

OK: GO TO  7.

NG: GO TO 6.

Check the following.

• EVAP canister for damage
• EVAP hose between EVAP canister and drain filter for clogging or poor connection

Repair hose or replace EVAP canister. Refer to "REMOVAL AND INSTALLATION ".

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

Water should not exist  .

OK or NG 

OK: GO TO 8.

NG: Replace EVAP control system pressure sensor. Refer to "REMOVAL AND INSTALLATION ".

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 9.

NG: Replace EVAP control system pressure sensor. Refer to "REMOVAL AND INSTALLATION ".

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END