Diagnosis Procedure

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

   Is the inspection result normal? 

   YES: GO TO 2.

   NO: 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.

Is the inspection result normal? 

YES: GO TO 3.

NO: Open fuel filler cap, then clean cap and fuel filler neck threads using air blower. Then retighten until ratcheting sound is heard.

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

Is the inspection result normal? 

YES: GO TO  5.

NO: GO TO 4.

Refer to , "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 5.

NO: Replace fuel filler cap with a genuine one.

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

Refer to , "SYSTEM DIAGRAM ".

Is the inspection result normal? 

YES: GO TO 6.

NO: Repair or reconnect the hose.

Clean EVAP purge line (pipe and rubber tube) using air blower.

GO TO 7.

Check the following.

• EVAP canister vent control valve is installed properly.

  Refer to , "EXPLODED VIEW ".

• EVAP canister vent control valve.

  Refer to , "COMPONENT INSPECTION ".

  Is the inspection result normal? 

  YES: GO TO 8.

  NO: Repair or replace EVAP canister vent control valve and O-ring.

Refer to , "SYSTEM DIAGRAM ".

Is there any leak in EVAP line? 

YES: Repair or replace.

NO-1: With CONSULT-III: GO TO 9.

NO-2: Without CONSULT-III: GO TO  10.

With CONSULT-III 

1. Disconnect vacuum hose from EVAP canister purge volume control solenoid valve at EVAP service port.
2. Start engine.
3. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode.
4. Touch "Qu" on CONSULT-III screen to increase "PURG VOL C/V" opening to 100%.
5. Check vacuum hose for vacuum.

   Vacuum should exist  .

   Is the inspection result normal? 

   YES: GO TO  12.

   NO: GO TO 11.

Without CONSULT-III 

1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose from 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  .

   Is the inspection result normal? 

   YES: GO TO  13.

   NO: GO TO 11.

Check vacuum hoses for clogging or disconnection. Refer to , "SYSTEM DIAGRAM ".

Is the inspection result normal? 

YES-1: With CONSULT-III: GO TO 12.

YES-2: Without CONSULT-III: GO TO  13.

NO: Repair or reconnect the hose.

With CONSULT-III 

1. Start engine.
2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III. Check that engine speed varies according to the valve opening.

   Does engine speed vary according to the valve opening? 

   YES: GO TO  14.

   NO: GO TO 13.

Refer to , "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 14.

NO: Replace EVAP canister purge volume control solenoid valve.

Refer to , "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 15.

NO: Replace fuel level sensor unit.

Refer to , "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 16.

NO: Replace EVAP control system pressure sensor.

Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper connection. For location, refer to , "DESCRIPTION ".

Is the inspection result normal? 

YES: GO TO 17.

NO: Repair or replace hoses and tubes.

Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and improper connection.

Is the inspection result normal? 

YES: GO TO 18.

NO: Repair or replace hose, tube or filler neck tube.

Refer to , "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 19.

NO: Replace refueling EVAP vapor cut valve with fuel tank.

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END