Infiniti M45 (Y34). Manual - part 502

EVAPORATIVE EMISSION SYSTEM

EC-697

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8.

Locate the leak using a leak detector. Refer to 

EC-693, "EVAP-

ORATIVE EMISSION LINE DRAWING"

 .

 WITHOUT CONSULT-II

1.

Attach the EVAP service port adapter securely to the EVAP ser-
vice port.

2.

Also attach the pressure pump with pressure gauge to the EVAP
service port adapter.

3.

Apply battery voltage to between the terminals of both EVAP canister vent control valve and vacuum cut
valve bypass valve to make a closed EVAP system.

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-693, "EVAPORATIVE EMISSION LINE DRAWING"

 .

SEF200U

SEF462UA

PBIB0026E

EC-698

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

PFP:00032

System Description

ABS002UF

From the beginning of refueling, the fuel tank pressure goes up. When the pressure reaches the setting value
of the refueling control valve (RCV) opening pressure, the RCV is opened. After RCV opens, the air and vapor
inside the fuel tank go through refueling EVAP vapor cut valve, RCV and refueling vapor line to the EVAP can-
ister. 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.
The RCV is always closed during driving and the evaporative emission control system is operated the same
as conventional system.

WARNING:

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

●

Put a “CAUTION: INFLAMMABLE” sign in workshop.

●

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

●

Be sure to furnish the workshop with a CO

2

  fire extinguisher.

CAUTION:

●

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-46, "FUEL PRESSURE RELEASE"

 .

–

Disconnect battery ground cable.

●

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

●

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

●

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

●

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

●

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.

SEF206VA

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-699

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Diagnostic Procedure

ABS002UG

SYMPTOM: FUEL ODOR FROM EVAP CANISTER IS STRONG.

1. 

CHECK EVAP CANISTER

1.

Remove EVAP canister with EVAP canister vent control valve attached.

2.

Weigh the EVAP canister with EVAP canister vent control valve attached.
The weight should be less than 1.8 kg (4.0 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?

Yes or No

Yes

>> GO TO 3.

No

>> GO TO 6.

3. 

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 4.

4. 

CHECK WATER SEPARATOR

Refer to 

EC-701, "Component Inspection"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Replace water separator.

5. 

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and water separator for clogging or poor connection.

>> Repair or replace EVAP hose.

6. 

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-701, "Component Inspection"

 .

OK or NG

OK

>> GO TO 7.

NG

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

7. 

CHECK REFUELING CONTROL VALVE

Refer to 

EC-701, "Component Inspection"

 .

OK or NG

OK

>> INSPECTION END

NG

>> Replace refueling control valve with fuel tank.

SEF596U

EC-700

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 attached.

2.

Weigh the EVAP canister with EVAP canister vent control valve attached.
The weight should be less than 1.8 kg (4.0 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?

Yes or No

Yes

>> GO TO 3.

No

>> GO TO 6.

3. 

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 4.

4. 

CHECK WATER SEPARATOR

Refer to 

EC-701, "Component Inspection"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Replace water separator.

5. 

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and water separator for clogging or poor connection.

>> Repair or replace EVAP hose.

6. 

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 7.

NG

>> Repair or replace hoses and tubes.

7. 

CHECK FILLER NECK TUBE

Check signal line and recirculation line for clogging, dents and cracks. 

OK or NG

OK

>> GO TO 8.

NG

>> Replace filler neck tube.

SEF596U