Infiniti M35/M45 Y50. Manual - part 568

EVAPORATIVE EMISSION SYSTEM

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EVAP SERVICE PORT

Positive pressure is delivered to the EVAP system through the EVAP
service port. If fuel vapor leakage in the EVAP system occurs, use a
leak detector to locate the leak.

Removal and Installation

NBS0059T

EVAP CANISTER

Tighten EVAP canister as shown in the figure.

EVAP CANISTER VENT CONTROL VALVE

1.

Turn EVAP canister vent control valve counterclockwise.

●

Lock (A)

●

Unlock (B)

2.

Remove the EVAP canister vent control valve.

Always replace O-ring with a new one.

How to Detect Fuel Vapor Leakage

NBS0059U

CAUTION:

●

Do not use compressed air or a high pressure pump.

●

Do not exceed 4.12 kPa (0.042 kg/cm

2

 , 0.6 psi) of pressure in EVAP system.

NOTE:

●

Do not start engine.

SEF462UA

1.

EVAP control system pressure sensor

2.

O-ring

3.

EVAP canister

4.

O-ring

5.

EVAP canister vent control valve

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EVAPORATIVE EMISSION SYSTEM

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Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.

 WITH CONSULT-II

1.

Attach the EVAP service port adapter securely to the EVAP service port.

2.

Also attach the pressure pump and hose to the EVAP service port adapter.

3.

Turn ignition switch ON.

4.

Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT
MODE” with CONSULT-II.

5.

Touch “START”. A bar graph (Pressure indicating display) will
appear on the screen.

6.

Apply positive pressure to the EVAP system until the pressure
indicator reaches the middle of the bar graph.

7.

Remove EVAP service port adapter and hose with pressure
pump.

8.

Locate the leak using a leak detector. Refer to 

EC-742, "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.

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EVAPORATIVE EMISSION SYSTEM

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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

●

EVAP canister (2)

●

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-742, "EVAPORATIVE EMISSION LINE DRAWING"

 .

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ON BOARD REFUELING VAPOR RECOVERY (ORVR)

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

PFP:00032

System Description

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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:

●

Put a “CAUTION: FLAMMABLE” 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-790, "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.

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