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.

OK or NG 

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

Fig 1: Identifying EVAP Canister Vent Control Valve And Pressure Sensor

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

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.

YES or NO 

1. Yes : GO TO 4.
2. No : GO TO  6

Fig 2: Checking Water Drain From EVAP Canister

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

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.
2. Check connector for water.
   1. Water should not exist. 
   Fig 3: Identifying EVAP Control System Pressure Sensor

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

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