2007 INFINITI FX35 fuel pressure

EC-1130
[VK45DE]
DTC P0461 FUEL LEVEL SENSOR
Revision: 2006 July 2007 FX35/FX45
6. Select “FUEL LEVEL SE” in “DATA MONITOR” mode with CON-
SULT-II.
7. Check “FUEL LEVEL SE” output voltage and note it.
8. Select “FUEL PUMP” in “ACTIVE TEST” mode with CONSULT- II.
9. Touch “ON” and drain fuel approximately 30 (7-7/8 US gal, 6- 5/8 Imp gal) and stop it.
10. Check “FUEL LEVEL SE” output voltage and note it.
11. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
12. Check “FUEL LEVEL SE” output voltage and note it.
13. Confirm whether the voltage changes more than 0.03V during step 7 to 10 and 10 to 12. If NG, go to EC-1130, "
Diagnostic Procedure" .
WITH GST
NOTE:
Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/8
Imp gal) in advance.
1. Prepare a fuel container and a spare hose.
2. Release fuel pressure from fuel line. Refer to EC-747, "
FUEL PRESSURE RELEASE" .
3. Remove the fuel feed hose on the fuel level sensor unit.
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch ON.
6. Drain fuel by 30 (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.
7. Confirm that the fuel gauge indication varies.
8. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
9. Confirm that the fuel gauge indication varies.
10. If NG, go to EC-1130, "
Diagnostic Procedure" .
Diagnostic ProcedureNBS0049C
1. CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to DI-31, "
SELF-DIAG RESULTS" .
OK or NG
OK >> GO TO 2.
NG >> Go to DI-21, "
Fuel Level Sensor Signal Inspection" .
2. CHECK INTERMITTENT INCIDENT
Refer to EC-812, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Removal and InstallationNBS0049D
FUEL LEVEL SENSOR
Refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" .
SEF195Y

DTC P2A00, P2A03 A/F SENSOR 1 EC-1287
[VK45DE]
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Revision: 2006 July 2007 FX35/FX45
DTC P2A00, P2A03 A/F SENSOR 1PFP:22693
Component DescriptionNBS004LP
The air fuel ratio (A/F) sensor 1 is a planar dual-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is the combination of a
Nernst concentration cell (sensor cell) with an oxygen-pump cell,
which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range (0.7 < < air).
The exhaust gas components diffuse through the diffusion gap at the
electrode of the oxygen pump and Nernst concentration cell, where
they are brought to thermodynamic balance.
An electronic circuit controls the pump current through the oxygen-
pump cell so that the composition of the exhaust gas in the diffusion
gap remains constant at = 1. Therefore, the A/F sensor 1 is able to
indicate air/fuel ratio by this pumping of current. In addition, a heater
is integrated in the sensor to ensure the required operating tempera-
ture of 700 - 800 °C (1,292 - 1,472 °F).
CONSULT-II Reference Value in Data Monitor ModeNBS004LQ
Specification data are reference values.
On Board Diagnosis LogicNBS004LR
To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored not to be
shifted to LEAN side or RICH side.
SEF579Z
SEF580Z
MONITOR ITEM CONDITION SPECIFICATION
A/F SEN1 (B1)
A/F SEN1 (B2)

Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 1.5 V
DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P2A00
2A00
(Bank 1) Air fuel ratio (A/F) sensor 1
circuit range/performance

The output voltage computed by ECM from the
A/F sensor 1 signal is shifted to the lean side
for a specified period.

The A/F signal computed by ECM from the A/F
sensor 1 signal is shifted to the rich side for a
specified period.

A/F sensor 1

A/F sensor 1 heater

Fuel pressure

Fuel injector

Intake air leaks
P2A03
2A03
(Bank 2)

EC-1320
[VK45DE]
FUEL PUMP
Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureNBS004H7
1. CHECK OVERALL FUNCTION
1. Turn ignition switch ON.
2. Pinch fuel feed hose (1) with two fingers.
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
2. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Turn ignition switch ON.
4. Check voltage between ECM terminal 113 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
11 3 G Y / R F u e l p u m p r e l a y [Ignition switch: ON]

For 1 second after turning ignition switch ON
[Engine is running] 0 - 1.5V
[Ignition switch: ON]

More than 1 second after turning ignition
switch ON BATTERY VOLTAGE
(11 - 14V)
Fuel pressure pulsation should be felt on the fuel feed
hose for 1 second after ignition switch is turned ON.
PBIB3245E
Voltage: Battery voltage
PBIB1187E

IGNITION SIGNAL EC-1343
[VK45DE]
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Revision: 2006 July 2007 FX35/FX45
Component InspectionNBS004GW
IGNITION COIL WITH POWER TRANSISTOR
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Disconnect ignition coil harness connector.
3. Check resistance between ignition coil terminals as follows.
4. If NG, replace ignition coil with power transistor. If OK, go to next step.
5. Turn ignition switch OFF.
6. Reconnect all harness connectors disconnected.
7. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-II to release fuel pressure, or fuel pres-
sure applies again during the following procedure.
8. Start engine.
9. After engine stalls, crank it two or three times to release all fuel pressure.
10. Turn ignition switch OFF.
11. Remove all ignition coil harness connectors to avoid the electri- cal discharge from the ignition coils.
12. Remove ignition coil and spark plug of the cylinder to be checked.
13. Crank engine for five seconds or more to remove combustion gas in the cylinder.
14. Connect spark plug and harness connector to ignition coil.
15. Fix ignition coil using a rope etc. with gap of 13 - 17 mm between the edge of the spark plug and grounded metal portion
as shown in the figure.
16. Crank engine for about three seconds, and check whether spark is generated between the spark plug and the grounded metal
portion.
CAUTION:

Do not approach to the spark plug and the ignition coil
within 50cm. Be careful not to get an electrical shock
while checking, because the electrical discharge voltage
becomes 20kV or more.

It might cause to damage the ignition coil if the gap of more than 17 mm is taken.
NOTE:
When the gap is less than 13 mm, the spark might be generated even if the coil is malfunctioning.
17. If NG, replace ignition coil with power transistor.
CONDENSER
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
Terminal No. (Polarity) Resistance Ω [at 25 °C (77 °F)]
1 and 2 Except 0 or ∞
1 and 3 Except 0
2 and 3
Spark should be generated.
PBIB0847E
PBIB1482E
PBIB2325E

EC-1366
[VK45DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2006 July 2007 FX35/FX45
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Fuel PressureNBS004I1
Idle Speed and Ignition TimingNBS004I2
*: 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 ValueNBS004I3
Mass Air Flow SensorNBS004I4
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature SensorNBS004I5
Engine Coolant Temperature SensorNBS004I6
Fuel Tank Temperature SensorNBS004I7
Crankshaft Position Sensor (POS)NBS004I8
Refer to EC-1037, "Component Inspection" .
Camshaft Position Sensor (PHASE)NBS004I9
Refer to EC-1044, "Component Inspection" .
A/F Sensor 1 HeaterNBS004LW
Fuel pressure at idling kPa (kg/cm2 , psi) Approximately 350 (3.57, 51)
Target idle speed No load* (in P or N position) 650
±50 rpm
Air conditioner: ON In P or N position 700 rpm or more
Ignition timing In P or N position 12 ° ± 5 ° BTDC
Condition Calculated load value% (Using CONSULT-II or GST)
At idle 14.0 - 33.0
At 2,500 rpm 12.0 - 25.0
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle 1.0 - 1.3V*
Mass air flow (Using CONSULT-II or GST) 2.0 - 6.0 g·m/sec at idle*
7.0 - 20.0 g·m/sec 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
Temperature °C ( °F) Resistance k Ω
20 (68) 2.3 - 2.7
50 (122) 0.79 - 0.90
Resistance [at 25°C (77 °F)] 2.3 - 4.3 Ω

EM-2Revision: 2006 July 2007 FX35/FX45
IGNITION COIL ......................................................
... 42
Components ........................................................ ... 42
Removal and Installation ..................................... ... 42
REMOVAL ........................................................ ... 42
INSTALLATION ................................................. ... 42
SPARK PLUG (PLATINUM-TIPPED TYPE) .......... ... 43
Components ........................................................ ... 43
Removal and Installation ..................................... ... 43
REMOVAL ........................................................ ... 43
INSPECTION AFTER REMOVAL ..................... ... 43
INSTALLATION ................................................. ... 44
FUEL INJECTOR AND FUEL TUBE ..................... ... 45
Components ........................................................ ... 45
Removal and Installation ..................................... ... 45
REMOVAL ........................................................ ... 45
INSTALLATION ................................................. ... 47
INSPECTION AFTER INSTALLATION ............. ... 50
ROCKER COVER .................................................. ... 51
Components ........................................................ ... 51
Removal and Installation ..................................... ... 51
REMOVAL ........................................................ ... 51
INSTALLATION ................................................. ... 52
FRONT TIMING CHAIN CASE .............................. ... 54
Removal and Installation ..................................... ... 54
REMOVAL ........................................................ ... 54
INSTALLATION ................................................. ... 58
INSPECTION AFTER INSTALLATION ............. ... 62
TIMING CHAIN ....................................................... ... 64
Components ........................................................ ... 64
Removal and Installation ..................................... ... 65
REMOVAL ........................................................ ... 65
INSPECTION AFTER REMOVAL ..................... ... 72
INSTALLATION ................................................. ... 72
INSPECTION AFTER INSTALLATION ............. ... 82
CAMSHAFT ............................................................ ... 83
Components ........................................................ ... 83
Removal and Installation ..................................... ... 84
REMOVAL ........................................................ ... 84
INSPECTION AFTER REMOVAL ..................... ... 85
INSTALLATION ................................................. ... 88
INSPECTION AFTER INSTALLATION ............. ... 92
Valve Clearance ................................................... ... 93
INSPECTION .................................................... ... 93
ADJUSTMENT ................................................. ... 96
OIL SEAL ............................................................... ... 98
Removal and Installation of Valve Oil Seal .......... ... 98
REMOVAL ........................................................ ... 98
INSTALLATION ................................................. ... 98
Removal and Installation of Front Oil Seal .......... ... 99
REMOVAL ........................................................ ... 99
INSTALLATION ................................................. ... 99
Removal and Installation of Rear Oil Seal ........... ... 99
REMOVAL ........................................................ ... 99
INSTALLATION ................................................. .100
CYLINDER HEAD .................................................. .101
On-Vehicle Service .............................................. .101
CHECKING COMPRESSION PRESSURE ...... .101
Components ........................................................ .102 Removal and Installation ......................................
.102
REMOVAL ......................................................... .102
INSPECTION AFTER REMOVAL ..................... .103
INSTALLATION ................................................. .104
INSPECTION AFTER INSTALLATION ............. .105
Disassembly and Assembly ................................. .106
DISASSEMBLY ................................................. .106
ASSEMBLY ....................................................... .107
Inspection After Disassembly ............................... .108
VALVE DIMENSIONS ....................................... .108
VALVE GUIDE CLEARANCE ........................... .108
VALVE GUIDE REPLACEMENT ...................... .109
VALVE SEAT CONTACT ................................... .110
VALVE SEAT REPLACEMENT ......................... .110
VALVE SPRING SQUARENESS ...................... . 111
VALVE SPRING DIMENSIONS AND VALVE
SPRING PRESSURE LOAD ............................. .112
ENGINE ASSEMBLY .............................................. .113
Components (2WD Models) ................................. .113
Removal and Installation (2WD Models) .............. .113
REMOVAL ......................................................... .114
INSTALLATION ................................................. .116
INSPECTION AFTER INSTALLATION ............. .117
Components (AWD Models) ................................ .118
Removal and Installation (AWD Models) ............. .118
REMOVAL ......................................................... .119
INSTALLATION ................................................. .121
INSPECTION AFTER INSTALLATION ............. .122
CYLINDER BLOCK ................................................ .123
Components ......................................................... .123
Disassembly and Assembly ................................. .124
DISASSEMBLY ................................................. .124
ASSEMBLY ....................................................... .129
How to Select Piston and Bearing ....................... .136
DESCRIPTION ................................................. .136
HOW TO SELECT PISTON .............................. .136
HOW TO SELECT CONNECTING ROD BEAR-
ING .................................................................... .137
HOW TO SELECT MAIN BEARING ................. .138
Inspection After Disassembly ............................... .141
CRANKSHAFT END PLAY ............................... .141
CONNECTING ROD SIDE CLEARANCE ........ .141
PISTON TO PISTON PIN OIL CLEARANCE .... .141
PISTON RING SIDE CLEARANCE .................. .142
PISTON RING END GAP ................................. .142
CONNECTING ROD BEND AND TORSION .... .143
CONNECTING ROD BIG END DIAMETER ..... .143
CONNECTING ROD BUSHING OIL CLEAR-
ANCE ................................................................ .143
CYLINDER BLOCK DISTORTION ................... .144
MAIN BEARING HOUSING INNER DIAMETER .145
PISTON TO CYLINDER BORE CLEARANCE . .145
CRANKSHAFT MAIN JOURNAL DIAMETER .. .146
CRANKSHAFT PIN JOURNAL DIAMETER ..... .147
CRANKSHAFT OUT-OF-ROUND AND TAPER .147
CRANKSHAFT RUNOUT ................................. .147
CONNECTING ROD BEARING OIL CLEAR-

PRECAUTIONS EM-5
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Revision: 2006 July 2007 FX35/FX45
[VQ35DE]PRECAUTIONSPFP:00001
Precautions Necessary for Steering Wheel Rotation After Battery DisconnectNBS003FN
NOTE:

This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).

Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″ LOCK ″ position.

Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-II.
Precautions for Drain Engine Coolant and Engine OilNBS003FO
Drain engine coolant and engine oil when the engine is cooled.
Precautions for Disconnecting Fuel PipingNBS003FP

Before starting work, make sure no fire or spark producing items are in the work area.

Release fuel pressure before disconnecting and disassembly.

After disconnecting pipes, plug openings to stop fuel leakage.
Precautions for Removal and DisassemblyNBS003FQ

When instructed to use SST, use specified tools. Always be careful to work safely, avoid forceful or unin-
structed operations.

Exercise maximum care to avoid damage to mating or sliding surfaces.

Cover openings of engine system with a tape or equivalent, if necessary, to seal out foreign materials.

Mark and arrange disassembly parts in an organized way for easy troubleshooting and re-assembly.

When loosening nuts and bolts, as a basic rule, start with the one furthest outside, then the one diagonally
opposite, and so on. If the order of loosening is specified, do exactly as specified. Power tools may be
used in the step.
Precautions for Inspection, Repair and ReplacementNBS003FR
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
Precautions for Assembly and InstallationNBS003FS

Use torque wrench to tighten bolts or nuts to specification.

EM-24
[VQ35DE]
INTAKE MANIFOLD
Revision: 2006 July 2007 FX35/FX45
INTAKE MANIFOLDPFP:14003
ComponentsNBS003G7
Removal and InstallationNBS003G8
REMOVAL
1. Release fuel pressure. Refer to EC-85, "FUEL PRESSURE RELEASE" .
2. Remove intake manifold collectors (upper and lower). Refer to EM-19, "
INTAKE MANIFOLD COLLEC-
TOR" .
3. Remove fuel tube and fuel injector assembly. Refer to EM-45, "
FUEL INJECTOR AND FUEL TUBE" .
4. Loosen mounting bolts and nuts in reverse order as shown in the figure to remove intake manifold with power tool.
5. Remove gaskets. CAUTION:
Cover engine openings to avoid entry of foreign materials.
1. Harness bracket 2. Intake manifold 3. Gasket
SBIA0487E
PBIC0778E