Nissan Frontier. Instruction — part 597
FUEL PRESSURE
EC-959
< PERIODIC MAINTENANCE >
[VQ40DE FOR USA AND CANADA]
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PERIODIC MAINTENANCE
FUEL PRESSURE
Fuel Pressure Check
INFOID:0000000009481657
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 (No.48) 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:
Be careful not to scratch or get the fuel hose connection area dirty when servicing, so that the quick
connector o-ring maintains sealability.
NOTE:
• Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel
pressure cannot be completely released because D40 models do not have fuel return system.
• Use Fuel Pressure Gauge Kit J-44321 and Fuel Pressure Adapter 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 J-45488.
• Never twist or kink fuel hose because it is plastic hose.
• Never remove fuel hose from quick connector.
• Keep fuel hose connections clean.
3. Install Fuel Pressure Adapter J-44321-6 and Fuel Pressure
Gauge (from kit J-44321) as shown in 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.
• During fuel pressure check, check for fuel leakage from fuel
connection every 3 minutes.
7. If result is unsatisfactory, go to next step.
BBIA0534E
At idling: Approximately 350 kPa (3.57 kg/cm
2
, 51 psi)
BBIA0535E
EC-960
< PERIODIC MAINTENANCE >
[VQ40DE FOR USA AND CANADA]
FUEL PRESSURE
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 pressure regulator.
If NG, repair or replace.
9. Before disconnecting Fuel Pressure Gauge and Fuel Pressure Adapter J-44321-6, release fuel pressure
to zero. Refer to "FUEL PRESSURE RELEASE".
EVAP LEAK CHECK
EC-961
< PERIODIC MAINTENANCE >
[VQ40DE FOR USA AND CANADA]
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EVAP LEAK CHECK
How to Detect Fuel Vapor Leakage
INFOID:0000000009481658
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:
• Never start engine.
• Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.
WITH CONSULT
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.
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
WITHOUT CONSULT
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 between the terminals of EVAP canister
vent control valve (3) to make a closed EVAP system.
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Fuel filler pipe (top of frame view) (1)
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EVAP control system pressure sensor (2)
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EVAP canister (4)
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Drain filter (5)
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: 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 and hose with pressure
pump.
6. Locate the leak using a leak detector. Refer to
.
SEF200U
SEF462UA
AWBIA0134ZZ
EC-962
< SERVICE DATA AND SPECIFICATIONS (SDS)
[VQ40DE FOR USA AND CANADA]
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Fuel Pressure
INFOID:0000000009481659
Idle Speed and Ignition Timing
INFOID:0000000009481660
*: Under the following conditions:
• Air conditioner switch: OFF
• Electric load: OFF (Lights, heater fan & rear window defogger)
• Steering wheel: Kept in straight-ahead position
Calculated Load Value
INFOID:0000000009481661
Mass Air Flow Sensor
INFOID:0000000009481662
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature Sensor
INFOID:0000000009481663
Engine Coolant Temperature Sensor
INFOID:0000000009481664
Air Fuel Ratio (A/F) Sensor 1 Heater
INFOID:0000000009481665
Fuel pressure at idling kPa (kg/cm
2
, psi)
Approximately 350 (3.57, 51)
Target idle speed
No load* [in P or N position (A/T),
Neutral position (M/T)]
625
± 50 rpm
Air conditioner: ON
In P or N position (A/T), Neutral posi-
tion (M/T)
625 rpm or more
Ignition timing
In P or N position (A/T), Neutral posi-
tion (M/T)
15
± 5° BTDC
Condition
Calculated load value% (Using CONSULT or GST)
At idle
5 - 35
At 2,500 rpm
5 - 35
Supply voltage
Battery voltage (11 - 14V)
Output voltage at idle
0.9 - 1.2*V
Mass air flow (Using CONSULT or GST)
2.0 - 6.0 g/s at idle*
7.0 - 20.0 g/s at 2,500 rpm*
Temperature [
°C (°F)]
Resistance (k
Ω)
25 (77)
1.800 - 2.200
Temperature [
°C (°F)]
Resistance (k
Ω)
20 (68)
2.1 - 2.9
50 (122)
0.68 - 1.00
90 (194)
0.236 - 0.260
Resistance [at 20
°C (68°F)]
1.80 - 2.44
Ω
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