2007 INFINITI QX56 battery

FL-6
< SERVICE INFORMATION >
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
d. Disconnect the fuel filler hose from the fuel filler pipe.
e. Insert a suitable hose into the fuel tank through the fuel filler hose to drain the fuel from the fuel tank.
• As a guide, the fuel level reaches the fuel gauge position as shown, or less, when approximately 14
liters (3 3/4 US gal, 3 1/8 Imp gal) of fuel are drained from the fuel tank.
3. Release the fuel pressure from the fuel lines. Refer to EC-80, "
Fuel Pressure Check" .
4. Disconnect the battery negative terminal.
5. Remove the second row LH seat and the third row LH seat. Refer to SE-89, "
Removal and Installation"
(second row), SE-95, "LH Side Seat" (third row).
6. Remove the second and third row rear seat belt buckles mounted on the floor. Refer to SB-3
.
7. Remove the LH center pillar trim, the LH rear trim panel, and the LH rear side door kick plate and weather
stripping. Refer to EI-34
.
8. Remove the second row rear center console and base, if equipped. Refer to EI-36
.
9. Reposition the floor carpet out of the way to access the inspection hole cover, located under the center LH
rear seat.
10. Remove the inspection hole cover by turning the retainers 90°
degrees clockwise.
• Remove the O-ring.
11. Disconnect the fuel level sensor, fuel filter, and fuel pump
assembly electrical connector, the EVAP hose, and the fuel feed
hose.
LBIA0386E
LBIA0382E
LBIA0383E

FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
FL-7
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Disconnect the quick connector as follows:
• Hold the sides of the connector, push in tabs and pull out the
tube.
• If the connector and the tube are stuck together, push and pull
several times until they start to move. Then disconnect them
by pulling.
CAUTION:
• The quick connector can be disconnected when the tabs
are completely depressed. Do not twist the quick connec-
tor more than necessary.
• Do not use any tools to disconnect the quick connector.
• Keep the resin tube away from heat. Be especially careful
when welding near the tube.
• Prevent any acid liquids such as battery electrolyte, from
getting on the resin tube.
• Do not bend or twist the resin tube during connection.
• Do not remove the remaining retainer on the hard tube (or
the equivalent) except when the resin tube or the retainer
is replaced.
• When the resin tube or hard tube, or the equivalent, is
replaced, also replace the retainer with a new one (white
colored retainer).
• To keep the quick connector clean and to avoid damage
and contamination from foreign materials, cover the quick
connector with plastic bags or suitable material as shown.
SFE562A
PBIC1268E
PBIC0163E

FUEL TANK
FL-11
< SERVICE INFORMATION >
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REMOVAL
WARNING:
Follow the “General Precautions” before working on the fuel system. Refer to GI-3, "
General Precau-
tion" .
1. Drain the fuel from the fuel tank, if necessary.
• Position the vehicle so it is level.
2. Remove the fuel filler cap to release the pressure from inside the fuel tank.
3. Check the fuel level on level gauge. If the fuel gauge indicates
more than the level as shown (full or almost full), drain the fuel
from the fuel tank until the fuel gauge indicates the level as
shown, or less.
• If the fuel pump does not operate, use the following procedure
to drain the fuel to the specified level after disconnecting the
fuel filler hose from the fuel filler pipe.
a. Insert a suitable hose of less than 15 mm (0.59 in) diameter into
the fuel filler pipe through the fuel filler opening to drain the fuel
from fuel filler pipe.
b. Insert a suitable hose into the fuel tank through the fuel filler
hose to drain the fuel from the fuel tank.
• As a guide, the fuel level reaches the fuel gauge position as shown, or less, when approximately 14
liters (3 3/4 US gal, 3 1/8 Imp gal) of fuel are drained from the fuel tank.
4. Remove the LH rear wheel and tire. Refer to WT-7, "
Rotation" .
5. Remove the four clips and remove the rear fender protector, front.
6. Disconnect the fuel filler hose from the fuel filler pipe and dis-
connect the vent hose quick connector.
7. Release the fuel pressure from the fuel lines. Refer to EC-80, "
Fuel Pressure Check" .
8. Disconnect the battery negative terminal.
9. Remove the second row LH seat and the third row LH seat. Refer to SE-89, "
Removal and Installation"
(second row), SE-95, "LH Side Seat" (third row).
10. Remove the second and third row rear seat belt buckles mounted on the floor. Refer to SB-3
.
11. Remove the LH center pillar trim, the LH rear trim panel, and the LH rear side door kick plate and weather
stripping. Refer to EI-34
.
12. Remove the second row rear center console and base. Refer to EI-36
.
13. Reposition the floor carpet out of the way to access the inspection hole cover, located under the center LH
rear seat.
14. Remove the inspection hole cover by turning the retainers 90°
degrees clockwise.
• Remove the O-ring.
WBIA0390E
LBIA0386E
LBIA0382E

FL-12
< SERVICE INFORMATION >
FUEL TANK
15. Disconnect the fuel level sensor, fuel filter, and fuel pump
assembly electrical connector, the EVAP hose, and the fuel feed
hose.
Disconnect the quick connector as follows:
• Hold the sides of the connector, push in tabs and pull out the
tube.
• If the connector and the tube are stuck together, push and pull
several times until they start to move. Then disconnect them
by pulling.
CAUTION:
• The quick connector can be disconnected when the tabs
are completely depressed. Do not twist the quick connec-
tor more than necessary.
• Do not use any tools to disconnect the quick connector.
• Keep the resin tube away from heat. Be especially careful
when welding near the tube.
• Prevent any acid liquids such as battery electrolyte, from
getting on the resin tube.
• Do not bend or twist the resin tube during connection.
• Do not remove the remaining retainer on the hard tube (or
the equivalent) except when the resin tube or the retainer
is replaced.
• When the resin tube or hard tube, or the equivalent, is
replaced, also replace the retainer with a new one (white
colored retainer).
LBIA0383E
SFE562A
PBIC1268E

GI-1
GENERAL INFORMATION
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SECTION GI
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CONTENTS
GENERAL INFORMATION
SERVICE INFORMATION ............................2
PRECAUTIONS ...................................................2
Description ................................................................2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
2
Precaution for NVIS/IVIS (NISSAN/INFINITI VE-
HICLE IMMOBILIZER SYSTEM - NATS) (If
Equipped) ..................................................................
2
General Precaution ...................................................3
Precaution for Three Way Catalyst ...........................4
Precaution for Fuel (Unleaded Premium Gasoline
Required) ..................................................................
4
Precaution for Multiport Fuel Injection System or
Engine Control System .............................................
5
Precaution for Hoses .................................................5
Precaution for Engine Oils ........................................6
Precaution for Air Conditioning .................................6
HOW TO USE THIS MANUAL ............................7
Description ................................................................7
Terms ........................................................................7
Units ..........................................................................7
Relation between Illustrations and Descriptions .......7
Contents ....................................................................8
Component ................................................................8
How to Follow Trouble Diagnosis ..............................9
How to Read Wiring Diagram ..................................13
Abbreviations ..........................................................20
SERVICE INFORMATION FOR ELECTRICAL
INCIDENT ...........................................................
22
How to Check Terminal ...........................................22
How to Perform Efficient Diagnosis for an Electri-
cal Incident ..............................................................
25
Control Units and Electrical Parts ............................32
CONSULT-II CHECKING SYSTEM ..................35
Description ...............................................................35
Function and System Application ............................35
Nickel Metal Hydride Battery Replacement .............36
Checking Equipment ...............................................36
CONSULT-II Start Procedure ..................................36
CONSULT-II Data Link Connector (DLC) Circuit .....38
LIFTING POINT .................................................40
Pantograph Jack ......................................................40
Garage Jack and Safety Stand ................................40
2-Pole Lift ................................................................40
TOW TRUCK TOWING .....................................42
Tow Truck Towing ...................................................42
Vehicle Recovery (Freeing a stuck vehicle) ............43
TIGHTENING TORQUE OF STANDARD
BOLTS ...............................................................
44
Tightening Torque Table .........................................44
RECOMMENDED CHEMICAL PRODUCTS
AND SEALANTS ...............................................
45
Recommended Chemical Product and Sealant .......45
IDENTIFICATION INFORMATION ....................46
Model Variation ........................................................46
Identification Number ...............................................47
Dimensions ..............................................................48
Wheels & Tires ........................................................48
TERMINOLOGY ................................................50
SAE J1930 Terminology List ...................................50

PRECAUTIONS
GI-3
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General PrecautionINFOID:0000000003531471
• Do not operate the engine for an extended period of time without
proper exhaust ventilation.
Keep the work area well ventilated and free of any flammable
materials. Special care should be taken when handling any flam-
mable or poisonous materials, such as gasoline, refrigerant gas,
etc. When working in a pit or other enclosed area, be sure to prop-
erly ventilate the area before working with hazardous materials.
Do not smoke while working on the vehicle.
• Before jacking up the vehicle, apply wheel chocks or other tire
blocks to the wheels to prevent the vehicle from moving. After jack-
ing up the vehicle, support the vehicle weight with safety stands at
the points designated for proper lifting before working on the vehi-
cle.
These operations should be done on a level surface.
• When removing a heavy component such as the engine or tran-
saxle/transmission, be careful not to lose your balance and drop
them. Also, do not allow them to strike adjacent parts, especially
the brake tubes and master cylinder.
• Before starting repairs which do not require battery power:
Turn off ignition switch.
Disconnect the negative battery terminal.
• If the battery terminals are disconnected, recorded memory of
radio and each control unit is erased.
• Battery posts, terminals and related accessories contain lead and
lead compounds. Wash hands after handling.
• 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.
SGI285
SGI231
SEF289H
SGI233

PRECAUTIONS
GI-5
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Precaution for Multiport Fuel Injection System or Engine Control SystemINFOID:0000000003531474
• 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 injec-
tors, be sure to release fuel pressure.
• Be careful not to jar components such as ECM and mass air flow
sensor.
Precaution for HosesINFOID:0000000003531475
HOSE REMOVAL and INSTALLATION
• To prevent damage to rubber hose, do not pry off rubber hose with
tapered tool or screwdriver.
• To reinstall the rubber hose securely, make sure of hose insertion
length and clamp orientation. (If tube is equipped with hose stop-
per, insert rubber hose into tube until it butts up against hose stop-
per.)
HOSE CLAMPING
• If old rubber hose is re-used, install hose clamp in its original posi-
tion (at the indentation where the old clamp was). If there is a trace
of tube bulging left on the old rubber hose, align rubber hose at
that position.
• Discard old clamps; replace with new ones.
SGI787
SMA019D
SMA020D
SMA021D

HOW TO USE THIS MANUAL
GI-9
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SYMBOLS
How to Follow Trouble DiagnosisINFOID:0000000003531484
DESCRIPTION
NOTICE:
Trouble diagnoses indicate work procedures required to diagnose problems effectively. Observe the following
instructions before diagnosing.
1.Before performing trouble diagnoses, read the “Preliminary Check”, the “Symptom Chart” or the
“Work Flow”.
2.After repairs, re-check that the problem has been completely eliminated.
3.Refer to Component Parts and Harness Connector Location for the Systems described in each
section for identification/location of components and harness connectors.
4.Refer to the Circuit Diagram for quick pinpoint check.
If you need to check circuit continuity between harness connectors in more detail, such as when a
sub-harness is used, refer to Wiring Diagram in each individual section and Harness Layout in PG
section for identification of harness connectors.
5.When checking circuit continuity, ignition switch should be OFF.
6.Before checking voltage at connectors, check battery voltage.
7.After accomplishing the Diagnostic Procedures and Electrical Components Inspection, make sure
that all harness connectors are reconnected as they were.
SAIA0749E