Diagnostic Procedure

Check obstructed water separator and rubber tube to EVAP canister vent control valve and clean the rubber tube using air blower.

Check water separator.

1. Check visually for insect nests in the water separator air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Check that A  and C  are not clogged by blowing air into B  with A  , and then C  plugged.
   Fig 1: Checking Rubber Tube For Clogging

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. In case of NG in items 2 - 4, replace the parts.
   • Do not disassemble water separator. 

OK or NG 

1. OK: GO TO 2.
2. NG: Clean, repair or replace rubber tube and/or water separator.

1. Remove EVAP canister vent control valve from EVAP canister.
   Fig 2: Removing EVAP Canister Vent Control Valve From EVAP Canister

   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 3: 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 4: Air Passage Continuity Inspection Chart

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Fig 5: 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.

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 6.
2. No: GO TO  8.

Fig 6: Identifying EVAP Canister

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  8.
2. NG: GO TO 7.

Check the following.

• Visually check the EVAP canister for damage.
• Check hose connection between EVAP canister and water separator for clogging and poor connection.
  1. Repair hose or replace EVAP canister.

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

OK or NG 

1. OK: GO TO 9.
2. NG: Install hose properly 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 10.
2. NG: Replace EVAP control system pressure sensor.

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

OK or NG 

1. OK: GO TO 11.
2. NG: Replace EVAP control system pressure sensor and repair or replace harness and connector.

Perform , "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. : INSPECTION END.