2001 INFINITI QX4 Factory Service Manual

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Page 1993 of 2395

INFINITI QX4 2001 Factory Service Manual Overheating Cause AnalysisNBLC0029
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
Ð Thermostat stuck closed Ð
Damaged finsDus

Page 1994 of 2395

INFINITI QX4 2001 Factory Service Manual Symptom Check items
Except cool-
ing system
parts mal-
functionÐ Overload on engineAbusive drivingHigh engine rpm under
no load
Driving in low gear for
extended time
Driving at extremely high
speed
P

Page 1995 of 2395

INFINITI QX4 2001 Factory Service Manual NOTES

Page 1996 of 2395

INFINITI QX4 2001 Factory Service Manual MAINTENANCE
SECTION
MA
CONTENTS
PRECAUTIONS...............................................................2
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...............2

MAINTENANCE
SECTION
MA
CONTENTS
PRECAUTIONS...............................................................2
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...............2
PREPARATION...............................................................3
Special Service Tool ....................................................3
Commercial Service Tool .............................................3
GENERAL MAINTENANCE............................................4
PERIODIC MAINTENANCE............................................6
Schedule 1 ...................................................................7
EMISSION CONTROL SYSTEM MAINTENANCE.........7
CHASSIS AND BODY MAINTENANCE........................8
Schedule 2 ...................................................................9
EMISSION CONTROL SYSTEM MAINTENANCE.........9
CHASSIS AND BODY MAINTENANCE......................10
RECOMMENDED FLUIDS AND LUBRICANTS........... 11
Fluids and Lubricants ................................................ 11
SAE Viscosity Number ..............................................12
GASOLINE ENGINE OIL..........................................12
GEAR OIL...............................................................12
Anti-freeze Coolant Mixture Ratio .............................12
ENGINE MAINTENANCE..............................................13
Checking Drive Belts .................................................13
Changing Engine Coolant..........................................14
-DRAINING ENGINE COOLANT-..............................14
-REFILLING ENGINE COOLANT-..............................15
-FLUSHING COOLING SYSTEM-..............................16
Checking Fuel Lines ..................................................16
Changing Fuel Filter ..................................................16
WITH CONSULT-II..............................................16
WITHOUT CONSULT-II.......................................17
Changing Air Cleaner Filter .......................................17
VISCOUS PAPER TYPE...........................................17
Changing Engine Oil..................................................18
Changing Oil Filter .....................................................18
Changing Spark Plugs ...............................................19
Checking EVAP Vapor Lines .....................................20
CHASSIS AND BODY MAINTENANCE.......................21
Checking Exhaust System.........................................21
Checking A/T Fluid ....................................................21
Changing A/T Fluid ....................................................21Checking All-mode 4WD Transfer Fluid ....................22
Changing All-mode 4WD Transfer Fluid ....................22
Checking Propeller Shaft ...........................................23
Greasing Propeller Shaft ...........................................23
Checking Differential Gear Oil ...................................23
Changing Differential Gear Oil ..................................24
LIMITED-SLIP DIFFERENTIAL GEAR........................24
Balancing Wheels ......................................................24
Tire Rotation ..............................................................24
Checking Brake Fluid Level and Leaks.....................25
Checking Brake Lines and Cables ............................25
Checking Disc Brake .................................................25
ROTOR...................................................................25
CALIPER.................................................................25
PAD........................................................................25
Checking Drum Brake ...............................................26
WHEEL CYLINDER..................................................26
DRUM.....................................................................26
LINING....................................................................26
TEMPORARY METHOD FOR CHECKING LINING
WEAR
.....................................................................26
Checking Steering Gear, Linkage and Transfer
Gear ...........................................................................26
STEERING GEAR....................................................26
STEERING LINKAGE...............................................26
STEERING TRANSFER GEAR..................................26
Checking Power Steering Fluid and Lines ................27
CHECKING FLUID LEVEL........................................27
CHECKING LINES...................................................27
Lubricating Locks, Hinges and Hood Latches...........27
Checking Seat Belts, Buckles, Retractors,
Anchors and Adjusters...............................................28
SERVICE DATA AND SPECIFICATIONS (SDS).........29
Engine Maintenance ..................................................29
DRIVE BELT DEFLECTION......................................29
DRIVE BELT TENSION............................................29
SPARK PLUG TYPE................................................29
Chassis and Body Maintenance ................................29
WHEEL BALANCE...................................................29
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Page 1997 of 2395

INFINITI QX4 2001 Factory Service Manual Supplemental Restraint System (SRS) ªAIR
BAGº and ªSEAT BELT PRE-TENSIONERº
NBMA0001The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat bel

Page 1998 of 2395

INFINITI QX4 2001 Factory Service Manual Special Service ToolNBMA0002The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
KV10115801
(J38956)

Page 1999 of 2395

INFINITI QX4 2001 Factory Service Manual NBMA0003
General maintenance includes those items which should be checked during the normal day-to-day operation
of the vehicle. They are essential if the vehicle is to continue operating properly. Th

NBMA0003
General maintenance includes those items which should be checked during the normal day-to-day operation
of the vehicle. They are essential if the vehicle is to continue operating properly. The owners can perform
checks and inspections themselves or they can have their INFINITI dealers do them.
OUTSIDE THE VEHICLE
The maintenance items listed here should be performed from time to time, unless otherwise specified.
ItemReference page
TiresCheck the pressure with a gauge periodically when at a service station,
including the spare, and adjust to the specified pressure if necessary. Check
carefully for damage, cuts or excessive wear.Ð
Wheel nutsWhen checking the tires, make sure no nuts are missing, and check for any
loose nuts. Tighten if necessary.Ð
Tire rotationTires should be rotated every 12,000 km (7,500 miles). MA-24
Wheel alignment and
balanceIf the vehicle pulls to either side while driving on a straight and level road, or
if you detect uneven or abnormal tire wear, there may be a need for wheel
alignment. If the steering wheel or seat vibrates at normal highway speeds,
wheel balancing may be needed.MA-24, SU-6, ªFront
Wheel Alignmentº
Windshield wiper
bladesCheck for cracks or wear if they do not wipe properly. Ð
Doors and engine
hoodCheck that all doors and the engine hood operate smoothly as well as the
trunk lid and back hatch. Also make sure that all latches lock securely. Lubri-
cate if necessary. Make sure that the secondary latch keeps the hood from
opening when the primary latch is released.
When driving in areas using road salt or other corrosive materials, check
lubrication frequently.MA-27
INSIDE THE VEHICLE
The maintenance items listed here should be checked on a regular basis, such as when performing periodic maintenance, cleaning the
vehicle, etc.
ItemReference page
LampsMake sure that the headlamps, stop lamps, tail lamps, turn signal lamps, and
other lamps are all operating properly and installed securely. Also check
headlamp aim.Ð
Warning lamps and
buzzers/chimesMake sure that all warning lamps and buzzers/chimes are operating properly. Ð
Windshield wiper
and washerCheck that the wipers and washer operate properly and that the wipers do
not streak.Ð
Windshield defrosterCheck that the air comes out of the defroster outlets properly and in sufficient
quantity when operating the heater or air conditioning.Ð
Steering wheelCheck that it has the specified play. Be sure to check for changes in the
steering condition, such as excessive play, hard steering or strange noises.
Free play: Less than 35 mm (1.38 in)Ð
SeatsCheck seat position controls such as seat adjusters, seatback recliner, etc. to
make sure they operate smoothly and that all latches lock securely in every
position. Check that the head restrains move up and down smoothly and that
the locks (if equipped) hold securely in all latched positions. Check that the
latches lock securely for folding-down rear seatbacks.Ð
Seat beltsCheck that all parts of the seat belt system (e.g. buckles, anchors, adjusters
and retractors) operate properly and smoothly and are installed securely.
Check the belt webbing for cuts, fraying, wear or damage.MA-28, RS-7, ªSeat Belt
Inspectionº
BrakesCheck that the brake does not pull the vehicle to one side when applied. Ð
GENERAL MAINTENANCE
MA-4

Page 2000 of 2395

INFINITI QX4 2001 Factory Service Manual ItemReference page
Brake pedal and
boosterCheck the pedal for smooth operation and make sure it has the proper dis-
tance under it when depressed fully. Check the brake booster function. Be
sure to ke

ItemReference page
Brake pedal and
boosterCheck the pedal for smooth operation and make sure it has the proper dis-
tance under it when depressed fully. Check the brake booster function. Be
sure to keep floor mats away from the pedal.BR-14, ªBrake Pedal and
Bracketº and BR-19,
ªBrake Boosterº
Parking brakeCheck that the lever has the proper travel and make sure that the vehicle is
held securely on a fairly steep hill when only the parking brake is applied.BR-31, ªParking Brake
Controlº
Automatic transmis-
sion ªParkº mecha-
nismCheck that the lock release button on the selector lever operates properly
and smoothly. On a fairly steep hill check that the vehicle is held securely
with the selector lever in the ªPº position without applying any brakes.Ð
UNDER THE HOOD AND VEHICLE
The maintenance items listed here should be checked periodically (e.g. each time you check the engine oil or refuel).
ItemReference page
Windshield washer
fluidCheck that there is adequate fluid in the tank. Ð
Engine coolant levelCheck the coolant level when the engine is cold. MA-15
Radiator and hosesCheck the front of the radiator and clean off any dirt, insects, leaves, etc.,
that may have accumulated. Make sure the hoses have no cracks,
deformation, deterioration or loose connections.Ð
Brake fluid levelsMake sure that the brake fluid levels are between the ªMAXº and ªMINº lines
on the reservoir.MA-25
BatteryCheck the fluid level in each cell. It should be between the ªMAXº and ªMINº
lines.Ð
Engine drive beltsMake sure that no belt is frayed, worn, cracked or oily. MA-13
Engine oil levelCheck the level on the dipstick after parking the vehicle on a level spot and
turning off the engine.MA-18
Power steering fluid
level and linesCheck the level on the dipstick with the engine off. Check the lines for
improper attachment, leaks, cracks, etc.MA-27
Automatic transmis-
sion fluid levelCheck the level on the dipstick after putting the selector lever in ªPº with the
engine idling.MA-21
Exhaust systemMake sure there are no loose supports, cracks or holes. If the sound of the
exhaust seems unusual or there is a smell of exhaust fumes, immediately
locate the trouble and correct it.MA-21
UnderbodyThe underbody is frequently exposed to corrosive substances such as those
used on icy roads or to control dust. It is very important to remove these
substances, otherwise rust will form on the floor pan, frame, fuel lines and
around the exhaust system. At the end of winter, the underbody should be
thoroughly flushed with plain water, being careful to clean those areas where
mud and dirt can easily accumulate.Ð
Fluid leaksCheck under the vehicle for fuel, oil, water or other fluid leaks after the
vehicle has been parked for a while. Water dripping from the air conditioner
after use is normal. If you should notice any leaks or gasoline fumes are
evident, check for the cause and correct it immediately.Ð
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GENERAL MAINTENANCE
MA-5

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