Diagnostic Procedure

1. Turn ignition switch OFF.
2. Check disconnection or obstruction of rubber tube connected to EVAP canister vent control valve.

OK or NG 

1. OK: GO TO 2.
2. NG: Repair or clean rubber tube.

1. Remove EVAP canister vent control valve from EVAP canister.
   Fig 1: Identifying EVAP Canister Vent Control Valve

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check portion B  of EVAP canister vent control valve for being rusted.

OK or NG 

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

With CONSULT-II 

1. Reconnect harness connectors disconnected.
2. Turn ignition switch "ON".
3. Perform "VENT CONTROL/V" in "ACTIVE TEST" mode.
4. Check air passage continuity and operation delay time.

Fig 2: Checking EVAP Canister Vent Control Valve-II (With Consult-II)

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

Without CONSULT-II 

Check air passage continuity and operation delay time under the following condition.

Fig 3: Air Passage Continuity Inspection Chart

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

Fig 4: Checking EVAP Canister Vent Control Valve-II (Without Consult-II)

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

Operation takes less than 1 second. 

OK or NG 

1. OK: GO TO  5.
2. NG: GO TO 4.

1. Clean the air passage (Portion A  to B  ) of EVAP canister vent control valve using an air blower.
2. Perform Test No. 3 again.

OK or NG 

1. OK: GO TO 5.
2. NG: Replace EVAP canister vent control valve.

Check vacuum cut valve as follows:

1. Plug port C  and D  with fingers.
2. Apply vacuum to port A  and check that there is no suction from port B. 
3. Apply vacuum to port B  and check that there is suction from port A. 
4. Blow air in port B  and check that there is a resistance to flow out of port A. 
5. Open port C  and D. 
6. Blow air in port A  check that air flows freely out of port C. 
7. Blow air in port B  check that air flows freely out of port D. 
   Fig 5: Identifying Location Of Vacuum Cut Valve

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

OK or NG 

1. OK: GO TO 6.
2. NG: Replace vacuum cut valve.

Fig 6: Identifying Vacuum Cut Valve

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

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

Yes or No 

1. Yes: GO TO  9.
2. No: GO TO 7.

Fig 7: Identifying EVAP Canister With Vent Control Valve

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

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

The weight should be less than 1.8 kg (4.0 lb). 

OK or NG 

1. OK: GO TO  9.
2. NG: GO TO 8.

Check the following.

1. Visually check the EVAP canister for damage.
2. Check hose connection between EVAP canister and water separator for clogging and poor connection.
3. Check water separator.

• Check visually for insect nests in the water separator air inlet.
• Check visually for cracks or flaws in the appearance.
• Check visually for cracks or flaws in the hose.
• Check that A  and C  are not clogged by blowing air into B  with A  , and then C  plugged.
Fig 8: Checking For Malfunctioning Parts
Courtesy of NISSAN MOTOR CO., U.S.A.
• In case of NG in items 2 - 4, replace the parts.
• Do not disassemble water separator. 
  1. Repair hose or replace EVAP canister or water separator.

Check disconnection or improper connection of hose connected to EVAP control system pressure sensor.

OK or NG 

1. OK: GO TO 10.
2. NG: Install hose property or replace it.

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

Water should not exist. 

OK or NG 

1. OK: GO TO 11.
2. NG: Replace EVAP control system pressure sensor.

Perform "DTC Confirmation Procedure" for DTC P0452, DTC CONFIRMATION PROCEDURE  and DTC P0453, DTC CONFIRMATION PROCEDURE .

OK or NG 

1. OK: GO TO 12.
2. NG: Replace EVAP control system pressure sensor and repair or replace harness and connector.

Perform , "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. INSPECTION END