Diagnostic Procedure

1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
   Fig 1: Identifying EVAP Canister Purge Volume Control Solenoid Valve Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch ON.
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 2 and engine ground with CONSULT-II or tester.
   Fig 2: Checking Voltage Between EVAP Canister Purge Volume Control Solenoid Valve Terminal And Engine Ground

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

Voltage: Battery voltage 

OK or NG 

1. OK: GO TO  3 .
2. NG: GO TO 2.

Check the following.

• Harness connectors E15, F18
• Harness connectors F56, F197
• Harness for open or short between EVAP canister purge volume control solenoid valve and ECM relay

1. : Repair harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 10 and EVAP canister purge volume control solenoid valve terminal 1.

   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  5 .
2. NG: GO TO 4.

Check the following.

• Harness connectors F197, F56
• Harness for open or short between ECM and EVAP canister purge volume control solenoid valve

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

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

Fig 3: Checking EVAP Control System Pressure Sensor Hose

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

OK or NG 

1. OK: GO TO 6.
2. NG: Repair it.

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

Water should not exist. 

OK or NG 

1. OK: GO TO 7.
2. NG: Replace EVAP control system pressure sensor.

1. Remove EVAP control system pressure sensor with its harness connector connected. See Figure .
   CAUTION: Never apply force to the air hole protector of the sensor if equipped.
2. Remove hose from EVAP control system pressure sensor.
3. Turn ignition switch ON.
4. Use pump to apply vacuum and pressure to EVAP control system pressure sensor as shown in Figure .
   CAUTION:

   • Always calibrate the vacuum pump gauge when using it.
   • Do not apply below -20 kPa (-150 mmHg, -5.91 inHg) or over 20 kPa (150 mmHg, 5.91 inHg) of pressure.
5. Check input voltage between ECM terminal 60 and ground. See Figure and Figure .

OK or NG 

1. OK (With CONSULT-II): GO TO 8.
2. OK (Without CONSULT-II): GO TO  9 .
3. NG: Replace EVAP control system pressure sensor.

With CONSULT-II 

1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.
3. Start engine.
4. Perform PURG VOL CONT/V in ACTIVE TEST mode with CONSULT-II. Check that engine speed varies according to the valve opening. See Figure .

OK or NG 

1. OK: GO TO  10 .
2. NG: GO TO 9.

With CONSULT-II 

Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions. See Figure .

Without CONSULT-II 

Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions. See Figure .

OK or NG 

1. OK: GO TO 10.
2. NG: Replace EVAP canister purge volume control solenoid valve.

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 11.
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 11.
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 .

Operation takes less than 1 second. 

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. 

Operation takes less than 1 second. 

OK or NG 

1. OK: GO TO  14 .
2. NG: GO TO 13.

1. Clean the air passage (Portion A  to B  ) of EVAP canister vent control valve using an air blower.
2. Perform procedure  9 again.

OK or NG 

1. OK: GO TO 14.
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. See Figure .

Yes or No 

1. Yes: GO TO 15.
2. No: GO TO  18 .

Weigh the EVAP canister with the 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  17 .
2. NG: GO TO 16.

Check the following.

• EVAP canister for damage
• EVAP hose between EVAP canister and water separator for clogging or poor connection

1. : Repair house or replace EVAP canister.

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. See Figure .
5. In case of NG in items 2 - 4, replace the parts.

OK or NG 

1. OK: GO TO 18.
2. NG: Clean or replace water separator.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  .

1. : INSPECTION END