Infiniti M35/M45 Y50. Manual - part 393

EVAPORATIVE EMISSION SYSTEM

EC-45

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3.

Apply battery voltage between the terminals of EVAP canister
vent control valve (1) to make a closed EVAP system.

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Illustration shows the view from under the vehicle

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: Vehicle front

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EVAP canister (2)

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EVAP control system pressure sensor (3)

4.

To locate the leak, deliver positive pressure to the EVAP system
until pressure gauge points reach 1.38 to 2.76 kPa (0.014 to
0.028 kg/cm

2

 , 0.2 to 0.4 psi).

5.

Remove EVAP service port adapter and hose with pressure
pump.

6.

Locate the leak using a leak detector. Refer to 

EC-40, "EVAPORATIVE EMISSION LINE DRAWING"

 .

PBIB2702E

EC-46

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ON BOARD REFUELING VAPOR RECOVERY (ORVR)

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

PFP:00032

System Description

NBS004SF

From the beginning of refueling, the air and vapor inside the fuel tank go through refueling EVAP vapor cut
valve and EVAP/ORVR line to the EVAP canister. The vapor is absorbed by the EVAP canister and the air is
released to the atmosphere.
When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and
refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged
during driving.

WARNING:

When conducting inspections below, be sure to observe the following:

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Put a “CAUTION: FLAMMABLE” sign in workshop.

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Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.

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Be sure to furnish the workshop with a CO

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  fire extinguisher.

CAUTION:

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Before removing fuel line parts, carry out the following procedures:

–

Put drained fuel in an explosion-proof container and put lid on securely.

–

Release fuel pressure from fuel line. Refer to 

EC-88, "FUEL PRESSURE RELEASE"

 .

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Disconnect battery ground cable.

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Always replace O-ring when the fuel gauge retainer is removed.

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Do not kink or twist hose and tube when they are installed.

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Do not tighten hose and clamps excessively to avoid damaging hoses.

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After installation, run engine and check for fuel leaks at connection.

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Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.

PBIB1068E

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

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Diagnostic Procedure

NBS004SG

SYMPTOM: FUEL ODOR FROM EVAP CANISTER IS STRONG.

1. 

CHECK EVAP CANISTER

1.

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

2.

Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.0 kg (4.4 lb).

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

Does water drain from the EVAP canister?

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EVAP canister (1)

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EVAP canister vent control valve (2)

Yes or No

Yes

>> GO TO 3.

No

>> GO TO 5.

3. 

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

>> Repair or replace EVAP hose.

5. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-49, "Component Inspection"

 .

OK or NG

OK

>> INSPECTION END

NG

>> Replace refueling EVAP vapor cut valve with fuel tank.

PBIB2731E

EC-48

[VQ35DE]

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

SYMPTOM: CANNOT REFUEL/FUEL ODOR FROM THE FUEL FILLER OPENING IS STRONG 
WHILE REFUELING.

1. 

CHECK EVAP CANISTER

1.

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

2.

Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.0 kg (4.4 lb).

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2. 

CHECK IF EVAP CANISTER SATURATED WITH WATER

Does water drain from the EVAP canister?

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EVAP canister (1)

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EVAP canister vent control valve (2)

Yes or No

Yes

>> GO TO 3.

No

>> GO TO 5.

3. 

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

>> Repair or replace EVAP hose.

5. 

CHECK VENT HOSES AND VENT TUBES

Check hoses and tubes between EVAP canister and refueling control valve for clogging, kink, looseness and
improper connection.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace hoses and tubes.

6. 

CHECK FILLER NECK TUBE

Check recirculation line for clogging, dents and cracks. 

OK or NG

OK

>> GO TO 7.

NG

>> Replace filler neck tube.

PBIB2731E