Diagnostic Procedure

1. Turn ignition switch OFF.
2. Disconnect rubber tube connected to EVAP canister vent control valve.
3. Check the rubber tube for clogging.
Fig 1: Identifying EVAP Canister & Components
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO 2.
2. NG: Clean rubber tube using an air blower.

Refer to "COMPONENT INSPECTION ".

OK or NG 

1. OK: GO TO 3.
2. NG: Replace EVAP canister vent control valve.

1. Remove EVAP canister with EVAP canister vent control valve attached.
2. Check if water will drain from the EVAP canister.
Fig 2: Checking EVAP Canister For Water Saturation
Courtesy of NISSAN MOTOR CO., U.S.A.

Yes or No 

1. Yes: GO TO 4.
2. No: GO TO  6.

Weigh the EVAP canister with the EVAP canister vent control valve attached.

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

OK or NG 

1. OK: GO TO  6.
2. NG: GO TO 5.

Check the following.

• EVAP canister for damage
• EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
  1. Repair hose or replace EVAP canister.

1. Disconnect EVAP control system pressure sensor harness connector.
Fig 3: Disconnecting EVAP Control System Pressure Sensor Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check connectors for water.

   Water should not exist. 

OK or NG 

1. OK: GO TO 7.
2. NG: Replace EVAP control system pressure sensor.

Refer to "COMPONENT INSPECTION ".

OK or NG 

1. OK: GO TO 8.
2. NG: Replace EVAP control system pressure sensor.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. INSPECTION END