Nissan Cube. Manual - part 398

EC-478

< PERIODIC MAINTENANCE >

[MR18DE]

FUEL PRESSURE

PERIODIC MAINTENANCE

FUEL PRESSURE

Inspection

INFOID:0000000009947591

FUEL PRESSURE RELEASE

 With CONSULT

1.

Turn ignition switch ON.

2.

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

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

1.

Remove fuel pump fuse located in IPDM E/R.

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 this models do not have fuel return system.

• The fuel hose connection method used when taking fuel pressure check must not be used for other

purposes.

• Be careful not to scratch or put debris around connection area when servicing, so that the quick

connector maintains seal ability with O-rings inside.

• Do not perform fuel pressure check with electrical systems operating (i.e. lights, rear defogger, A/C,

etc.) Fuel pressure gauge may indicate false readings due to varying engine load and changes in
manifold vacuum.

1.

Release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE".

2.

Prepare fuel hose for fuel pressure check B and fuel tube
adapter (KV10118400) D, then connect fuel pressure gauge A.
•

: To quick connector

•

: To fuel tube (engine side)

• C:  Clamp
•  Use suitable fuel hose for fuel pressure check (genuine NIS-

SAN fuel hose without quick connector).

• To avoid unnecessary force or tension to hose, use moder-

ately long fuel hose for fuel pressure check.

• Do not use the fuel hose for checking fuel pressure with dam-

age or cracks on it.

• Use Pressure Gauge to check fuel pressure.

3.

Remove fuel hose. Refer to 

EM-35, "Removal and Installation"

.

• Do not twist or kink fuel hose because it is plastic hose.

PBIB2982E

FUEL PRESSURE

EC-479

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[MR18DE]

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4.

Connect fuel hose for fuel pressure check (1) to fuel tube
(engine side) with clamp (2) as shown in the figure.
• No.2 spool (5)
• Wipe off oil or dirt from hose insertion part using cloth moist-

ened with gasoline.

• Apply proper amount of gasoline between top of the fuel tube

(3) and No.1 spool (4).

• Insert fuel hose for fuel pressure check until it touches the

No.1 spool on fuel tube.

• Use NISSAN genuine hose clamp (part number: 16439 N4710

or 16439 40U00).

• When reconnecting fuel line, always use new clamps.
• Use a torque driver to tighten clamps.
• Install hose clamp to the position within 1 - 2 mm (0.04 - 0.08 in).

• Make sure that clamp screw does not contact adjacent parts.

5.

Connect fuel tube adapter to quick connector.
• A: Fuel pressure gauge
• B: Fuel hose for fuel pressure check

6.

After connecting fuel hose for fuel pressure check, pull the hose
with a force of approximately 98 N (10 kg, 22 lb) to confirm fuel
tube does not come off.

7.

Turn ignition switch ON and check for fuel leakage.

8.

Start engine and check for fuel leakage.

9.

Read the indication of fuel pressure gauge.
• Do not perform fuel pressure check with system operating.

Fuel pressure gauge may indicate false readings.

• During fuel pressure check, confirm for fuel leakage from fuel connection every 3 minutes.

10. If result is unsatisfactory, go to next step.

11. Check the following.

• Fuel hoses and fuel tubes for clogging
• Fuel filter for clogging
• Fuel pump 
• Fuel pressure regulator for clogging
If OK, replace fuel pressure regulator.
If NG, repair or replace.

12. Before disconnecting Fuel Pressure Gauge and Fuel Pressure Adapter J-44321-6, release fuel pressure

to zero. Refer to "FUEL PRESSURE RELEASE".

Tightening torque: 1 - 1.5 N·m (0.1 - 0.15 kg-m, 9 - 13 in-lb)

At idling: Approximately 350 kPa (3.57 kg/cm

2

, 51 psi)

PBIB2983E

JMBIA2317ZZ

EC-480

< PERIODIC MAINTENANCE >

[MR18DE]

EVAP LEAK CHECK

EVAP LEAK CHECK

Inspection

INFOID:0000000009947592

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 [commercial service tool: (J-41413-OBD)] to the EVAP

service port may cause a leak.

 WITH CONSULT

1.

Install EVAP service port adapter [commercial service tool: (J-
41413-OBD)] and pressure pump to EVAP service port.

2.

Turn ignition switch ON.

3.

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

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 [commercial service tool: (J-
41413-OBD)] and hose with pressure pump.

7.

Locate the leak using a leak detector [commercial service tool:
(J-41416)]. Refer to 

EC-82, "System Description"

.

 WITHOUT CONSULT

1.

Install EVAP service port adapter [commercial service tool: (J-
41413-OBD)] 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 [commercial service tool: (J-
41413-OBD)] and hose with pressure pump.

SEF462UA

SEF200U

SEF462UA

EVAP LEAK CHECK

EC-481

< PERIODIC MAINTENANCE >

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5.

Locate the leak using a leak detector [commercial service tool:
(J-41416)]. Refer to 

EC-82, "System Description"

.

SEF200U