Diagnostic Procedure

1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.

OK or NG 

1. OK: GO TO 2.
2. NG: Replace with genuine NISSAN fuel filler cap.

Fig 1: Identifying Nissan Fuel Filler Cap

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

• Check that the cap is tightened properly by rotating the cap clockwise.

OK or NG 

1. OK: GO TO 3.
2. NG:
   • Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
   • Retighten until ratcheting sound is heard.

• Check for air releasing sound while opening the fuel filler cap.

OK or NG 

1. OK: GO TO  5.
2. NG: GO TO 4.

1. Wipe clean valve housing.
   Fig 2: Identifying Fuel Tank Vacuum Relief Valve (Gas Cap)

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check valve opening pressure and vacuum.

   Pressure : 15.3 - 20.0 kPa 

   (0.156 - 0.204 kg/cm ² , 2.22 - 2.90 psi)

   Vacuum : -6.0 to -3.3 kPa 

   (-0.061 to -0.034 kg/cm ² , -0.87 to -0.48 psi)

   Fig 3: Checking Valve Opening Pressure And Vacuum

   Courtesy of NISSAN MOTOR CO., U.S.A.
   CAUTION: Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.

OK or NG 

1. OK: GO TO 5.
2. NG: Replace fuel filler cap with a genuine one.

To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely.

Fig 4: Identifying EVAP Service Port

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

Fig 5: Installing EVAP Service Port Adapter To EVAP Service Port

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

1. Models with CONSULT-II: GO TO 6.
2. Models without CONSULT-II: GO TO  7.

With CONSULT-II 

1. Turn ignition switch ON.
2. Select "EVAP SYSTEM CLOSE" of "WORK SUPPORT" mode with CONSULT-II.
3. Touch "START" and apply pressure into the EVAP line until the pressure indicator reaches the middle of the bar graph.
   NOTE:

   • Never use compressed air or a high pressure pump.
   • Do not exceed 4.12 kPa (0.042 kg/cm² , 0.6 psi) of pressure in the system.
   Fig 6: Scan Tool Display

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to instruction manual for more details.

   Refer to "EVAPORATIVE EMISSION LINE DRAWING "

   Fig 7: Identifying EVAP Leak Detector

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

   OK or NG 

   1. OK: GO TO  8.
   2. NG: Repair or replace.

Without CONSULT-II 

1. Turn ignition switch OFF.
2. Apply 12 volts DC to EVAP canister vent control valve. The valve will close. (Continue to apply 12 volts until the end of test.)
Fig 8: Checking For EVAP Leak
Courtesy of NISSAN MOTOR CO., U.S.A.
3. Apply 12 volts DC to vacuum cut valve bypass valve. The valve will open. (Continue to apply 12V until the end of test.)
4. Pressurize the EVAP line using pressure pump with 1.3 to 2.7 kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and EVAP service port adapter.
   NOTE:

   • Never use compressed air or a high pressure pump.
   • Do not exceed 4.12 kPa (0.042 kg/cm² , 0.6 psi) of pressure in the system.
5. Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to instruction manual for more details . Refer to "EVAPORATIVE EMISSION LINE DRAWING ".

OK or NG 

1. OK: GO TO 8.
2. NG: Repair or replace.
   Fig 9: Identifying EVAP Leak Detector

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

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 10: Checking For Malfunctioning Parts
Courtesy of NISSAN MOTOR CO., U.S.A.
5. In case of NG in items 2 - 4, replace the parts.

OK or NG 

1. OK: GO TO 9.
2. NG: Replace water separator.

• Refer to , "DTC CONFIRMATION PROCEDURE ".

OK or NG 

1. OK: GO TO 10.
2. NG: Repair or replace EVAP canister vent control valve and O-ring or harness/connector.

1. Remove EVAP canister with EVAP canister vent control valve attached.
2. Does water drain from the EVAP canister?

Yes or No 

1. Yes: GO TO 11.
2. No (With CONSULT-II): GO TO  13.
3. No (Without CONSULT-II): GO TO  14.
   Fig 11: Removing EVAP Canister With EVAP Canister Vent Control Valve

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

• 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 (With CONSULT-II): GO TO  13.
2. OK (Without CONSULT-II): GO TO  14.
3. NG: GO TO 12.

• Check the following.

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

With CONSULT-II 

1. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
2. Start engine.
3. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode.
   Fig 12: Scan Tool Display - Active Test

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Touch "Qu" on CONSULT-II screen to increase "PURG VOL CONT/V" opening to 100.0%.
5. Check vacuum hose for vacuum when revving engine up to 2,000 RPM.

Vacuum should exist. 

OK or NG 

1. OK: GO TO  16.
2. NG: GO TO  15.

Without CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 RPM.

Vacuum should exist. 

OK or NG 

1. OK: GO TO  17.
2. NG: GO TO 15.

• Check vacuum hoses for clogging or disconnection. Refer to , "VACUUM HOSE DRAWING ".

OK or NG 

1. OK (With CONSULT-II): GO TO 16.
2. OK (Without CONSULT-II): GO TO  17.
3. NG: Repair or reconnect the hose.

With CONSULT-II 

1. Start engine.
2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-II. Check that engine speed varies according to the valve opening.
Fig 13: Scan Tool Display - Active Test
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO  18.
2. NG: GO TO 17.

With CONSULT-II 

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

Fig 14: Identifying EVAP Canister Purge Volume Control Solenoid Valve And EVAP Service Port

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

Fig 15: Checking Air Passage Continuity Of EVAP Canister Purge Solenoid (With CONSULT-II)

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

Without CONSULT-II 

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

Fig 16: Identifying EVAP Canister Purge Volume Control Solenoid Valve And EVAP Service Port

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

Fig 17: Checking Air Passage Continuity Of EVAP Canister Purge Solenoid (Without CONSULT-II)

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

OK or NG 

1. OK: GO TO 18.
2. NG: Replace EVAP canister purge volume control solenoid valve.

1. Remove fuel level sensor unit.
2. Check resistance between fuel level sensor unit and fuel pump terminals 2 and 4 by heating with hot water or heat gun as shown in the figure.

Fig 18: Temperature/Resistance Chart

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

Fig 19: Checking Resistance Of Fuel Tank Temperature Sensor

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

OK or NG 

1. OK: GO TO 19.
2. NG: Replace fuel level sensor unit.

1. Remove EVAP control system pressure sensor with its harness connector connected.
   Fig 20: Identifying EVAP Control System Pressure Sensor

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Remove hose from EVAP control system pressure sensor.
3. 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 -93.3 kPa (-700 mmHg, -27.56 inHg) or over 101.3 kPa (760 mmHg, 29.56 inHg) of pressure.
4. Check output voltage between ECM terminal 62 and engine ground.

Fig 21: Voltage Chart

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

Fig 22: Checking Output Voltage Between ECM Terminal And Engine Ground

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

OK or NG 

1. OK: GO TO 20.
2. NG: Replace EVAP control system pressure sensor.

• Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.

  Refer to "EVAPORATIVE EMISSION LINE DRAWING ".

OK or NG 

1. OK: GO TO 21.
2. NG: Repair or reconnect the hose.

• Clean EVAP purge line (pipe and rubber tube) using air blower.
  1. GO TO 22.

Refer to "FUEL LEVEL SENSOR UNIT CHECK ".

OK or NG 

1. OK: GO TO 23.
2. NG: Replace fuel level sensor unit.

• Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. : INSPECTION END.