Nissan Frontier. Manual - part 474

 

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Nissan Frontier. Manual - part 474

 

 

FUEL PRESSURE

EC-467

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4. Install the fuel pressure gauge as shown in the figure.

• 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

and No.1 spool.

• 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.

• When reconnecting fuel hose, check the original fuel hose for

damage and abnormality.

• 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. 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.

6. Turn ignition switch ON, and check for fuel leakage.
7. Start engine and check for fuel leakage.
8. Read the indication of fuel pressure gauge.

• Never perform fuel pressure check with system operating. Fuel pressure gauge may indicate false read-

ings.

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

9. If result is unsatisfactory, go to next step.
10. 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 level sensor unit, fuel filter and fuel pump assembly.

If NG, repair or replace.

Method B

CAUTION:

• Be careful not to scratch or get the fuel hose connection area dirty when servicing, so that the quick

connector o-ring maintains seal ability. 

• Use Fuel Pressure Gauge Kit [SST (J-44321)] and Fuel Pressure Gauge Adapter [SST (J-44321-6)] to

check fuel pressure.

1. Release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE".
2. Remove fuel hose using Quick Connector Release [SST (J-45488)]. Refer to 

EM-39, "Removal and Instal-

lation"

.

• Never twist or kink fuel hose because it is plastic hose.

• Never remove fuel hose from quick connector.

• Keep fuel hose connections clean.

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)

PBIB0669E

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FUEL PRESSURE

3. Install Fuel Pressure Gauge Adapter [SST (J-44321-6)] and

Fuel Pressure Gauge kit [SST (J-44321)] as shown in the figure. 

• Never distort or bend fuel rail tube when installing fuel pres-

sure gauge adapter.

• When reconnecting fuel hose, check the original fuel hose for

damage and abnormality.

4. Turn ignition switch ON (reactivate fuel pump), and check for

fuel leakage.

5. Start engine and check for fuel leakage. 
6. Read the indication of fuel pressure gauge kit [SST (J-44321)].

• During fuel pressure check, check for fuel leakage from fuel

connection every 3 minutes.

7. If result is unsatisfactory, go to next step.
8. 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 level sensor unit, fuel filter and fuel pump assembly.

If NG, repair or replace. 

9. Before disconnecting Fuel Pressure Gauge kit [SST (J-44321)] and Fuel Pressure Adapter [SST (J-

44321-6)], release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE".

At idling: Approximately 350 kPa (3.57 kg/cm

2

, 51 psi)

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EVAP LEAK CHECK

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EVAP LEAK CHECK

How to Detect Fuel Vapor Leakage

INFOID:0000000009481168

CAUTION:

• Never use compressed air or a high pressure pump.
• Never 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) to the EVAP service port may

cause a leak.

 WITH CONSULT

1. To locate the EVAP leak, install EVAP service adapter (commercial service tool) 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) and hose with pressure pump.
7. Locate the leak using a leak detector (commercial service tool).

Refer to 

EC-41, "Description"

.

 WITHOUT CONSULT

1. To locate the EVAP leak, install EVAP service adapter (commer-

cial service tool) and pressure pump to EVAP service port.

2. Attach the pressure pump with pressure gauge to the EVAP ser-

vice port adapter.

3. Apply battery voltage between the terminals of EVAP canister

vent control valve (1) to make a closed EVAP system.

- EVAP control system pressure sensor (2)

- Drain filter (3)

- EVAP canister (4)
- 

: Vehicle front

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 (commercial service tool)

and hose with pressure pump.

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EVAP LEAK CHECK

6. Locate the leak using a leak detector (commercial service tool). Refer to 

EC-41, "Description"

.

 

 

 

 

 

 

 

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