2007 INFINITI M35 fuel pump

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
FL-7
C
D
E
F
G
H
I
J
K
L
MA
FL
Revision: 2007 April2007 M35/M45
Fuel hose

When installing fuel hose connector insert them fully until a click
sound of full stopper engagement is heard.
Main and Sub Fuel Level Sensor Unit

Face main and sub fuel level sensor units as shown in the fig-
ure, and install them with the knock pin on back aligned with pin
hole on fuel tank.

Install retainer so that its notch becomes parallel with the notch
on fuel tank.

Tighten retainer mounting bolts evenly.
Quick Connector
Connect quick connector as follows:
1. Check the connection for damage or any foreign materials.
2. Align the connector with the tube, then insert the connector straight into the tube until a click sound is
heard.
3. After connecting, make sure that the connection is secure by following method.

Pull the tube and the connector to make sure they are
securely connected.

Visually confirm that the two retainer tabs are connected to
the connector.
INSPECTION AFTER INSTALLATION
Use the following procedure to check for fuel leaks.
PBIC1579E
PBIC1065E
PBIC1652E
PBIC1653E

FL-8
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
Revision: 2007 April2007 M35/M45
1. Turn ignition switch “ON” (with engine stopped), then check connections for leaks by applying fuel pres-
sure to fuel piping.
2. Start engine and let it idle and make sure there are no fuel leaks at the fuel system connections.
ComponentsNBS005RC
Disassembly and AssemblyNBS005RD
CAUTION:
Sub fuel level sensor unit cannot be disassembled and should be replaced as a unit.
DISASSEMBLY
Remove fuel level sensor unit as follows.
1. Disconnect harness connector.

Hold connector by fingers and pull it out, because there is no
stopper release tab.
2. Using suitable tool, pull up tabs points as shown in the figure
(two points) to release the lock.
CAUTION:
Be careful not to damage it.
3. After fixing tabs are disengaged, slide fuel level sensor unit out
in direction shown by the arrow.
CAUTION:
Do not disassemble fuel filter and fuel pump assembly.
1. Fuel level sensor unit 2. Fuel filter and fuel pump assembly
PBIC1081E
PBIC1078E
PBIC1654E
PBIC1080E

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
FL-9
C
D
E
F
G
H
I
J
K
L
MA
FL
Revision: 2007 April2007 M35/M45
ASSEMBLY
1. Check for damage of fuel level sensor unit installation position on the side of fuel filter and fuel pump
assembly.
2. Slide fuel level sensor unit until it aligns to installation groove, then insert it until it stops.

After inserting, apply force in reverse direction (removal direction) to ensure it cannot be pulled out.
3. Connect the black (A) and white (B) harnesses so that they are
in the positions shown in the figure.

Securely insert harness connector until it stops.
PBIC3387E

FL-10
FUEL TANK
Revision: 2007 April2007 M35/M45
FUEL TANKPFP:17202
ComponentsNBS005RE
Removal and InstallationNBS005RF
REMOVAL
WARNING:
Be sure to read “General Precautions” when working on the fuel system. Refer to FL-3, "
General Pre-
cautions" .

Drain fuel from fuel tank if necessary. Refer to FL-4, "REMOVAL" .

Perform work on level place.
1. Perform steps 2 to 7 of “REMOVAL” in “ FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP
ASSEMBLY” on main and sub fuel level sensor units. Refer to FL-4, "
REMOVAL" .
2. Remove exhaust front tube, center muffler and main muffler. Refer to EX-3, "
EXHAUST SYSTEM" .
3. Remove propeller shaft. Refer to PR-6, "
REAR PROPELLER SHAFT" .
4. Remove parking rear brake cables. Refer to PB-4, "
PARKING BRAKE CONTROL" .
5. Remove rear suspension assembly. Refer to RSU-5, "
REAR SUSPENSION ASSEMBLY" .
6. Remove fuel tank protector.
1. Grommet 2. Fuel filler cap 3. Fuel tank mounting band
4. Fuel tank protector 5. Insulator 6. Fuel tank
7. Vent tube 8. Vent hose 9. Fuel filler tube
10. Fuel filler hose 11. EVAP hose 12. Vent hose
PBIC3201E

PRECAUTIONS
GI-5
C
D
E
F
G
H
I
J
K
L
MB
GI
Revision: 2007 April2007 M35/M45

To prevent serious burns:
Avoid contact with hot metal parts.
Do not remove the radiator cap when the engine is hot.

Dispose of or recycle drained oil or the solvent used for cleaning
parts in an appropriate manner.

Do not attempt to top off the fuel tank after the fuel pump nozzle
shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel
spray and possibly a fire.

Clean all disassembled parts in the designated liquid or solvent
prior to inspection or assembly.

Replace oil seals, gaskets, packings, O-rings, locking washers, cotter pins, self-locking nuts, etc. with new
ones.

Replace inner and outer races of tapered roller bearings and needle bearings as a set.

Arrange the disassembled parts in accordance with their assembled locations and sequence.

Do not touch the terminals of electrical components which use microcomputers (such as ECM).
Static electricity may damage internal electronic components.

After disconnecting vacuum or air hoses, attach a tag to indicate the proper connection.

Use only the fluids and lubricants specified in this manual.

Use approved bonding agent, sealants or their equivalents when required.

Use hand tools, power tools (disassembly only) and recom-
mended special tools where specified for safe and efficient ser-
vice repairs.

When repairing the fuel, oil, water, vacuum or exhaust systems,
check all affected lines for leaks.

Before servicing the vehicle:
Protect fenders, upholstery and carpeting with appropriate cov-
ers.
Take caution that keys, buckles or buttons do not scratch paint.
WARNING:
To prevent ECM from storing the diagnostic trouble codes, do not carelessly disconnect the harness
connectors which are related to the engine control system and TCM (transmission control module)
system. The connectors should be disconnected only when working according to the WORK FLOW of
TROUBLE DIAGNOSES in EC and AT sections.
Precautions for Three Way CatalystNAS0009G
If a large amount of unburned fuel flows into the catalyst, the catalyst temperature will be excessively high. To
prevent this, follow the instructions.

Use unleaded gasoline only. Leaded gasoline will seriously damage the three way catalyst.

When checking for ignition spark or measuring engine compression, make tests quickly and only when
necessary.
SGI233
PBIC0190E
SGI234

GI-6
PRECAUTIONS
Revision: 2007 April2007 M35/M45

Do not run engine when the fuel tank level is low, otherwise the engine may misfire, causing damage to
the catalyst.
Do not place the vehicle on flammable material. Keep flammable material off the exhaust pipe and the three
way catalyst.
Precautions for Fuel (Unleaded Premium Gasoline Recommended) (VQ35DE
Engine Models)
NAS0009H
INFINITY recommends the use of unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-
Knock Index) number (Research octane number 96).
If unleaded premium gasoline is not available, you may use unleaded regular gasoline with an octane rating of
at least 87 AKI number (Research octane number 91), but you may notice a decrease in performance.
CAUTION:
Do not use leaded gasoline. Using leaded gasoline will damage the three way catalyst. Do not use E-85
fuel (85%fuel ethanol, 15% unleaded gasoline) unless the vehicle is specifically designed for E-85 fuel
(i.e. Flexible Fuel Vehicle - FFV models). Using a fuel other than that specified could adversely affect
the emission control devices and systems, and could also affect the warranty coverage validity.
Precautions for Fuel (Unleaded Premium Gasoline Required) (VK45DE Engine
Models)
NAS0009I
Use unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-Knock Index) number (Research
octane number 96).
If unleaded premium gasoline is not available, unleaded regular gasoline with an octane rating of at least 87
AKI number (Research octane number 91) can be used, but only under the following precautions:

Have the fuel tank filled only partially with unleaded regular gasoline, and fill up with unleaded premium
gasoline as soon as possible.

Avoid full throttle driving and abrupt acceleration.
However, for maximum vehicle performance, the use of unleaded premium gasoline is recommended.
CAUTION:
Do not use leaded gasoline. Using leaded gasoline will damage the three way catalyst. Do not use E-85
fuel (85%fuel ethanol, 15% unleaded gasoline) unless the vehicle is specifically designed for E-85 fuel
(i.e. Flexible Fuel Vehicle - FFV models). Using a fuel other than that specified could adversely affect
the emission control devices and systems, and could also affect the warranty coverage validity.
Precautions for Multiport Fuel Injection System or Engine Control SystemNAS0009J

Before connecting or disconnecting any harness connector for
the multiport fuel injection system or ECM:
Turn ignition switch to “OFF” position.
Disconnect negative battery terminal.
Otherwise, there may be damage to ECM.

Before disconnecting pressurized fuel line from fuel pump to
injectors, be sure to release fuel pressure.

Be careful not to jar components such as ECM and mass air
flow sensor.
SGI787

GI-54
TERMINOLOGY
Revision: 2007 April2007 M35/M45
Nonvolatile random access memory NVRAM ***
On board diagnostic system OBD system Self-diagnosis
Open loop OL Open loop
Oxidation catalyst OC Catalyst
Oxidation catalytic converter system OC system ***
Oxygen sensor O2S Exhaust gas sensor
Park position switch *** Park switch
Park/neutral position switch PNP switchPark/neutral switch
Inhibitor switch
Neutral position switch
Periodic trap oxidizer system PTOX system ***
Positive crankcase ventilation PCV Positive crankcase ventilation
Positive crankcase ventilation valve PCV valve PCV valve
Powertrain control module PCM ***
Programmable read only memory PROM ***
Pulsed secondary air injection control sole-
noid valvePAIRC solenoid valve AIV control solenoid valve
Pulsed secondary air injection system PAIR system Air induction valve (AIV) control
Pulsed secondary air injection valve PAIR valve Air induction valve
Random access memory RAM ***
Read only memory ROM ***
Scan tool ST ***
Secondary air injection pump AIR pump ***
Secondary air injection system AIR system ***
Sequential multiport fuel injection system SFI system Sequential fuel injection
Service reminder indicator SRI ***
Simultaneous multiport fuel injection sys-
tem*** Simultaneous fuel injection
Smoke puff limiter system SPL system ***
Supercharger SC ***
Supercharger bypass SCB ***
System readiness test SRT ***
Thermal vacuum valve TVV Thermal vacuum valve
Three way catalyst TWC Catalyst
Three way catalytic converter system TWC system ***
Three way + oxidation catalyst TWC + OC Catalyst
Three way + oxidation catalytic converter
systemTWC + OC system ***
Throttle body TBThrottle chamber
SPI body
Throttle body fuel injection system TBI system Fuel injection control
Throttle position TP Throttle position
Throttle position sensor TPS Throttle sensor
Throttle position switch TP switch Throttle switch
Torque converter clutch solenoid valve TCC solenoid valveLock-up cancel solenoid
Lock-up solenoid NEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM

IDX-4
ALPHABETICAL INDEX
Engine control system diagram ........... EC-30, EC-732
Engine coolant temperature sensor (ECTS) ... EC-214,
EC-226
, EC-926, EC-939
Engine coolant(VK45DE) .................................. CO-40
Engine coolant(VQ35DE) ................................. CO-11
Engine oil filter replacement ............................. MA-26
Engine oil filter replacement(VQ35DE) ............. MA-19
Engine oil precautions .......................................... GI-7
Engine oil replacement(VQ35DE) ..................... MA-18
Engine oil(VK45DE) ........................................... LU-27
Engine oil(VQ35DE) ............................................ LU-7
Engine removal(VK45DE) ............................... EM-247
Engine removal(VQ35DE) .............................. EM-114
Engine room cover ............................................ EM-15
Engine room cover(VK45DE) ......................... EM-173
ETC1 - Wiring diagram .................... EC-605, EC-1323
ETC2 - Wiring diagram .................... EC-600, EC-1318
ETC3 - Wiring diagram .................... EC-611, EC-1330
EVAP canister ...................................... EC-42, EC-744
EVAP canister purge volume control solenoid valve ....
EC-400
, EC-408, EC-1108, EC-1116
EVAP canister vent control valve ...... EC-415, EC-422,
EC-1123
, EC-1130
EVAP control system (small leak) diagnosis .. EC-391,
EC-453
, EC-1100, EC-1160
EVAP control system pressure sensor ........... EC-428,
EC-431
, EC-437, EC-1136, EC-1139, EC-1145
EVAP control system purge flow monitoring diagnosis
EC-386
, EC-1095
EVAP vapor lines inspection ................. MA-21, MA-28
Evaporative emission (EVAP) system . EC-39, EC-741
Evaporator ..................................................... ATC-167
Exhaust manifold(VK45DE) ............................ EM-183
Exhaust system ................................................... EX-3
Exhaust system inspection ..................... EX-3, MA-29
Expansion valve ............................................. ATC-168
F
F/FOG - Wiring diagram ................................... LT-198
F/PUMP - Wiring diagram ................ EC-676, EC-1396
Final drive pre-inspection .................. FFD-16, RFD-19
Final drive removal and installation .. FFD-13, RFD-16
Floor trim ............................................................. EI-50
Flow charts ......................................................... GI-28
Fluid temperature sensor (A/T) ........................ AT-135
Fluorescent leak detector .............................. ATC-169
FPCM - Wiring diagram ................... EC-512, EC-1227
Freeze frame data ............................... EC-60, EC-762
Front brake solenoid valve ................. AT-151, AT-153
Front bumper ...................................................... EI-11
Front combination lamp removal and installation LT-75
Front door ............................. BL-188, BL-194, GW-61
Front passenger air bag .................................. SRS-46
Front seat belt .................................................... SB-29
Front seat belt pre-tensioner ..... SB-2, SRS-3, SRS-51
Front washer ...................................................... WW-4
Front wiper ......................................................... WW-4
FTS - Wiring diagram ....................................... AT-136
FTTS - Wiring diagram .... EC-333, EC-338, EC-1045,
EC-1050
Fuel cut control (at no load high engine speed) EC-34,
EC-736
Fuel filter replacement ......................................... FL-4
Fuel gauge ............................................................ DI-5
Fuel injection system (Bank 1) ......... EC-309, EC-320,
EC-1022
, EC-1033
Fuel injection system (Bank 2) ......... EC-309, EC-320,
EC-1022
, EC-1033
Fuel injector ................................................... EC-1389
Fuel injector and fuel tube(VK45DE) .............. EM-193
Fuel injector and fuel tube(VQ35DE) ................ EM-47
Fuel level sensor EC-462, EC-464, EC-466, EC-1169,
EC-1171
, EC-1173
Fuel line inspection .................................. FL-3, MA-25
Fuel line inspection(VQ35DE) .......................... MA-18
Fuel pressure check ........................... EC-88, EC-790
Fuel pressure release ......................... EC-88, EC-790
Fuel pump ....................................... EC-675, EC-1395
Fuel pump and gauge .......................................... FL-4
Fuel pump control module .............. EC-510, EC-1225
Fuel pump dropping resistor ........... EC-510, EC-1225
Fuel system ......................................................... FL-3
Fuel tank ............................................................ FL-10
Fuel tank temperature sensor .......... EC-331, EC-337,
EC-1043
, EC-1049
Fuel tank vacuum relief valve ............. EC-42, EC-744
FUELB1 - Wiring diagram EC-311, EC-322, EC-1024,
EC-1035
FUELB2 - Wiring diagram EC-313, EC-324, EC-1026,
EC-1037
Fuse .................................................................. PG-17
Fuse and fusible link box ................................ PG-115
Fusible link ........................................................ PG-17
G
Gauges ................................................................. DI-5
Generator - See Alternator ................................ SC-20
Glass ........................ GW-11, GW-59, GW-61, GW-65
Grille - See Exterior ............................................ EI-16
Ground distribution ........................................... PG-45
H
H/LAMP - Wiring diagram ....................... LT-13
, LT-47
Harness connector .......................................... PG-104
Harness layout .................................................. PG-62
Hazard warning lamp ....................................... LT-212
Headlamp removal and installation .................... LT-75
Headlining - See Roof trim .................................. EI-52
Heated oxygen sensor 2 (bank 1) .... EC-274, EC-285,
EC-298
, EC-987, EC-998, EC-1011
Heated oxygen sensor 2 (bank 2) .... EC-274, EC-285,
EC-298
, EC-987, EC-998, EC-1011
Heated oxygen sensor 2 heater (bank 1) ....... EC-177,
EC-890
Heated oxygen sensor 2 heater (bank 2) ....... EC-177,