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. Refer to "EXPLODED VIEW ".

   Fig 1: Identifying Genuine Nissan Fuel Filler Cap

   Courtesy of NISSAN NORTH AMERICA, INC.

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. 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.

Check fuel tank vacuum relief valve. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 5.

NO: Replace fuel filler cap with a genuine one. Refer to "EXPLODED VIEW ".

Check for EVAP leakage. Refer to "WORK PROCEDURE ".

Is there any leakage in EVAP line? 

YES: Repair or replace malfunctioning part.

NO: GO TO 6.

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 7.

  NO: Repair or replace EVAP canister vent control valve and O-ring. Refer to "EXPLODED VIEW ".

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached. Refer to "EXPLODED VIEW ".

Does water drain from the EVAP canister? 

YES: GO TO 8.

NO-1: With CONSULT: GO TO  10.

NO-2: Without CONSULT: GO TO  11.

Fig 2: Checking EVAP Canister For Water Drainage

Courtesy of NISSAN NORTH AMERICA, INC.

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

The weight should be less than 2.1 kg (4.6 lb). 

Is the inspection result normal? 

YES-1: With CONSULT: GO TO  10.

YES-2: Without CONSULT: GO TO  11.

NO: GO TO 9.

Check the following.

• EVAP canister for damage
• EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

  : Repair hose or replace EVAP canister. Refer to "EXPLODED VIEW ".

With CONSULT 

1. Disconnect vacuum hose connected to EVAP service port and EVAP canister purge volume control solenoid valve from EVAP service port.
2. Start engine.
3. Perform "PURG VOL C/V" in "ACTIVE TEST" mode.
4. Touch "Qu" on CONSULT 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  13.

   NO: GO TO  12.

Without CONSULT 

1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose connected to EVAP service port and EVAP canister purge volume control solenoid valve from 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  14.

   NO: GO TO 12.

Check vacuum hoses for clogging or disconnection. Refer to "EVAPORATIVE EMISSION SYSTEM: SYSTEM DESCRIPTION ".

Is the inspection result normal? 

YES: GO TO 13.

NO: Repair or reconnect the hose.

Check EVAP canister purge volume control solenoid valve. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 14.

NO: Replace EVAP canister purge volume control solenoid valve. Refer to "EXPLODED VIEW ".

Check fuel tank temperature sensor. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 15.

NO: Replace fuel level sensor unit. Refer to "EXPLODED VIEW ".

Check EVAP control system pressure sensor. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 16.

NO: Replace EVAP control system pressure sensor. Refer to "EXPLODED VIEW ".

Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection. Refer to "EVAPORATIVE EMISSION SYSTEM: SYSTEM DESCRIPTION ".

Is the inspection result normal? 

YES: GO TO 17.

NO: Repair or reconnect the hose.

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

: GO TO 18.

Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper connection. For location, refer to "ON BOARD REFUELING VAPOR RECOVERY (ORVR) ".

Is the inspection result normal? 

YES: GO TO 19.

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 20.

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

Check refueling EVAP vapor cut valve. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 21.

NO: Replace refueling EVAP vapor cut valve with fuel tank. Refer to "EXPLODED VIEW ".

Check fuel level sensor. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

NO: Replace fuel level sensor unit. Refer to "EXPLODED VIEW ".