Diagnostic Procedure

1. Do you have With CONSULT-II?

Yes or No 

1. Yes: GO TO 2.
2. No: GO TO  3 .

With CONSULT-II 

1. Turn ignition switch OFF and then turn ON.
2. Select VENT CONTROL/V in ACTIVE TEST mode with CONSULT-II.
3. Touch ON/OFF on With CONSULT-II screen.
   Fig 1: Displaying CONSULT-II ACTIVE TEST Screen

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check for operating sound of the valve.

   Clicking noise should be heard. 

OK or NG 

1. OK: GO TO  7 .
2. NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect EVAP canister vent control valve harness connector. See Figure .
3. Turn ignition switch ON.
4. Check voltage between EVAP canister vent control valve terminal 1 and ground with CONSULT-II or tester.
   Fig 2: Checking Voltage Between EVAP Canister Vent Control Valve Terminal 1 And Ground

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

   Voltage: Battery voltage 

OK or NG 

1. OK: GO TO  5 .
2. NG: GO TO 4.

Check the following.

• Harness connectors M5, B1
• Fuse block (J/B) connector M19
• 15A fuse
• Harness for open or short between EVAP canister vent control valve and fuse

1. : Repair harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 105 and EVAP canister vent control valve terminal 2.

   Refer to Wiring Diagram.

   Continuity should exist. 

4. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  7 .
2. NG: GO TO 6.

Check the following.

• Harness connectors B3, M6
• Harness connectors M81, F49
• Harness for open or short between EVAP canister vent control valve and ECM

1. : Repair open circuit or short to ground or short to power in harness or connectors.

1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.

OK or NG 

1. OK: GO TO 8.
2. NG: Clean the rubber tube using an air blower.

1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B  of EVAP canister vent control valve for being rusted. See Figure .

OK or NG 

1. OK: GO TO 9.
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. See Figure .

Without CONSULT-II 

Check air passage continuity and operation delay time under the following conditions. See Figure .

Make sure new O-ring is installed properly. 

OK or NG 

1. OK: GO TO  11 .
2. NG: GO TO 10.

1. Clean the air passage (Portion A  to B  ) of EVAP canister vent control valve using an air blower.
2. Perform Test No. 9 again.

OK or NG 

1. OK: GO TO 11.
2. NG: Replace EVAP canister vent control valve.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  .

1. : INSPECTION END