Infiniti G37 Coupe. Manual - part 605

FUEL PRESSURE

EC-601

< ON-VEHICLE MAINTENANCE >

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ON-VEHICLE MAINTENANCE

FUEL PRESSURE

Inspection

INFOID:0000000001734363

FUEL PRESSURE RELEASE

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT” mode with CONSULT-III.

3.

Start engine.

4.

After engine stalls, crank it two or three times to release all fuel pressure.

5.

Turn ignition switch OFF.

 Without CONSULT-III

1.

Remove fuel pump fuse (1) located in IPDM E/R (2).

2.

Start engine.

3.

After engine stalls, crank it two or three times to release all fuel
pressure.

4.

Turn ignition switch OFF.

5.

Reinstall fuel pump fuse after servicing fuel system.

FUEL PRESSURE CHECK

CAUTION:

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
NOTE:
• Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel

pressure cannot be completely released because CV36 models do not have fuel return system.

• Use Fuel Pressure Gauge Kit (J-44321) to check fuel pressure.

1.

Release fuel pressure to zero.

2.

Install the inline fuel quick disconnected fitting (A) between fuel
damper (1) and injector tube.

3.

Connect the fuel pressure test gauge (quick connector adapter
hose) (B) to the inline fuel quick disconnected fitting.

4.

Turn ignition switch ON and check for fuel leakage.

5.

Start engine and check for fuel leakage.

6.

Read the indication of fuel pressure gauge.

7.

If result is unsatisfactory, check fuel hoses and fuel tubes for
clogging.
If OK, Replace “fuel filter and fuel pump assembly”.
If NG, Repair or replace.

JMBIA0021ZZ

At idling

: Approximately 350 kPa (3.57 kg/cm

2

, 51 psi)

JMBIA0028ZZ

EC-602

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EVAP LEAK CHECK

EVAP LEAK CHECK

Inspection

INFOID:0000000001734364

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

 WITH CONSULT-III

1.

To locate the EVAP leak, install EVAP service port adapter and
pressure pump to EVAP service port.

2.

Turn ignition switch ON.

3.

Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT”
mode with CONSULT-III.

4.

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

5.

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

6.

Remove EVAP service port adapter and hose with pressure
pump.

7.

Locate the leak using a leak detector. Refer to 

EC-80, "System

Diagram"

.

 WITHOUT CONSULT-III

1.

To locate the EVAP leak, install EVAP service port adapter and
pressure pump to EVAP service port.

2.

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

3.

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).

4.

Remove EVAP service port adapter and hose with pressure
pump.

SEF462UA

SEF200U

SEF462UA

EVAP LEAK CHECK

EC-603

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5.

Locate the leak using a leak detector. Refer to 

EC-80, "System

Diagram"

.

SEF200U

EC-604

< ON-VEHICLE REPAIR >

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EVAP CANISTER

ON-VEHICLE REPAIR

EVAP CANISTER

Exploded View

INFOID:0000000001734365

Removal and Installation

INFOID:0000000001734366

REMOVAL

1.

Lift up the vehicle.

2.

Remove EVAP canister fixing bolt.

3.

Remove EVAP canister.

NOTE:
The EVAP canister vent control valve and EVAP canister system pressure sensor can be removed without
removing the EVAP canister.

INSTALLATION

Install in the reverse order of removal.
NOTE:
Tighten EVAP canister fixing bolt to the specified torque.

DISASSEMBLY

1.

Turn EVAP canister vent control valve counterclockwise.

2.

Remove the EVAP canister vent control valve.

1.

EVAP canister system pressure sen-
sor

2.

O-ring

3.

EVAP canister

4.

O-ring

5.

EVAP canister vent control valve

Refer to 

GI-3, "Contents"

 for symbols not described on the above.

JMBIA0049GB

A

:  Lock

B

:  Unlock

PBIB2730E