Diagnosis Procedure

1. Do you have CONSULT-III?

Yes or No 

Yes: GO TO 2.

No: GO TO  2.

With CONSULT-III 

1. Turn ignition switch OFF and then turn ON.
2. Select "VENT CONTROL/V" in "ACTIVE TEST" mode with CONSULT-III.
3. Touch "ON/OFF" on CONSULT-III screen.
4. Check for operating sound of the valve.

   Clicking noise should be heard  .

OK or NG 

OK: GO TO  8.

NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect EVAP canister vent control valve (3) harness connector.
   • This illustration is a view from under vehicle
   • EVAP control system pressure sensor (1)
   • EVAP canister (2)
3. Turn ignition switch ON.
   Fig 1: Location Of EVAP Control System Pressure Sensor, EVAP Canister And EVAP Canister Vent Control Valve

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between EVAP canister vent control valve terminal 1 and ground with CONSULT-III or tester.

   Voltage: Battery voltage 

   Fig 2: Checking Voltage Between ECT Sensor Terminal 1 And Ground

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

OK or NG 

OK: GO TO  5.

NG: GO TO 4.

Check the following.

• Harness connectors B9, E13
• Harness for open or short between EVAP canister vent control valve and IPDM E/R

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

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 109 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 

OK: GO TO 6.

NG: 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 

OK: GO TO 7.

NG: Clean the rubber tube using an air blower.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 8.

NG: Replace drain filter.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 9.

NG: Replace EVAP canister vent control valve. Refer to "REMOVAL AND INSTALLATION ".

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END