belt INFINITI QX4 2001 Factory Workshop 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. 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

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
GI
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GENERAL MAINTENANCE
MA-5

Schedule 1NBMA0004S01EMISSION CONTROL SYSTEM MAINTENANCENBMA0004S0101
Abbreviations: R = Replace. I = Inspect. Correct or replace if necessary. [ ]: At the mileage intervals only
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference
Section
- Page or
- Content Title Perform at number of miles, kilo-
meters or months, whichever
comes first.Miles x 1,000
(km x 1,000)
Months3.75
(6)
37.5
(12)
611.25
(18)
915
(24)
1218.75
(30)
1522.5
(36)
1826.25
(42)
2130
(48)
2433.75
(54)
2737.5
(60)
3041.25
(66)
3345
(72)
3648.75
(78)
3952.5
(84)
4256.25
(90)
4560
(96)
48
Drive beltsI* I* MA-13
Air cleaner filter NOTE (1) [R] [R] MA-17
EVAP vapor linesI* I* MA-20
Fuel linesI* I* MA-16
Fuel filter* NOTE (2)MA-16
Engine coolant NOTE (3)R* MA-14
Engine oil RRRRRRRRRRRRRRRRMA-18
Engine oil filter (Use part No.
15208-31U00 or equivalent.)RRRRRRRRRRRRRRRRMA-18
Spark plugs (PLATINUM-TIPPED
type)Replace every 105,000 miles (169,000 km) MA-19
Intake & exhaust valve clearance* NOTE (4)EM-52, ªValve
Clearanceº
NOTE:
(1) If operating mainly in dusty conditions, more frequent maintenance may be required.
(2) When the filter becomes clogged, the vehicle speed cannot be increased as the driver wishes. In such an event, replace the filter.
(3) After 60,000 miles (96,000 km) or 48 months, replace every 30,000 miles (48,000 km) or 24 months.
(4) If valve noise increases, inspect valve clearance.
HMaintenance items and intervals with ª*º are recommended by INFINITI for reliable vehicle operation. The owner need not perform such maintenance in order to maintain the
emission warranty or manufacturer recall liability. Other maintenance items and intervals are required.
GI
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
PERIODIC MAINTENANCE
Schedule 1
MA-7

Schedule 2NBMA0004S02EMISSION CONTROL SYSTEM MAINTENANCENBMA0004S0201
Abbreviations: R = Replace. I = Inspect. Correct or replace if necessary. [ ]: At the mileage intervals only
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference Section
- Page
or
- Content Title Perform at number of miles, kilometers
or months, whichever comes first.Miles x 1,000
(km x 1,000)
Months7.5
(12)
615
(24)
1222.5
(36)
1830
(48)
2437.5
(60)
3045
(72)
3652.5
(84)
4260
(96)
48
Drive beltsI* I* MA-13
Air cleaner filter[R] [R] MA-17
EVAP vapor linesI* I* MA-20
Fuel linesI* I* MA-16
Fuel filter* NOTE (1)MA-16
Engine coolant NOTE (2)R* MA-14
Engine oilRRRRRRRRMA-18
Engine oil filter (Use part No. 15208-
31U00 or equivalent.)RRRRRRRRMA-18
Spark plugs (PLATINUM-TIPPED type) Replace every 105,000 miles (169,000 km) MA-19
Intake & exhaust valve clearance* NOTE (3)EM-52, ªValve Clear-
anceº
NOTE:
(1) When the filter becomes clogged, the vehicle speed cannot be increased as the driver wishes. In such an event, replace the filter.
(2) After 60,000 miles (96,000 km) or 48 months, replace every 30,000 miles (48,000 km) or 24 months.
(3) If valve noise increases, inspect valve clearance.
HMaintenance items and intervals with ª*º are recommended by INFINITI for reliable vehicle operation. The owner need not perform such maintenance in order to maintain the
emission warranty or manufacturer recall liability. Other maintenance items and intervals are required.
GI
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
PERIODIC MAINTENANCE
Schedule 2
MA-9

Checking Drive BeltsNBMA0010
SMA091D
1. Inspect belt for cracks, fraying, wear and oil. If necessary,
replace.
2. Inspect drive belt deflection or tension at a point on the belt
midway between pulleys.
3. Check belt tension using belt tension gauge (BT3373-F or
equivalent).
Inspect drive belt deflection or tension when engine is cold.
Adjust if belt deflections exceed the limit or if belt tension is
not within specifications.
Belt deflection and tension
Deflection adjustment Unit: mm (in) Tension adjustment *1 Unit: N (kg, lb)
Used belt
New beltUsed belt
New belt
Limit After adjustment Limit After adjustment
Alternator
Power steering
oil pump
Fan7 (0.28)4-5
(0.16 - 0.20)3.5 - 4.5
(0.138 - 0.177)294 (30, 66)730 - 818 (74.4 -
83.5, 164 - 184)838 - 926 (85.4 -
94.5, 188 - 208)
Air conditioner
compressor12 (0.47)9-10
(0.35 - 0.39)8-9
(0.31 - 0.35)196 (20, 44)348 - 436 (35.5 -
44.5, 78 - 98)470 - 559 (47.9 -
57.0, 106 - 126)
Applied pushing
force98 N (10 kg, 22 lb) Ð
*1 If belt tension gauge cannot be installed at check points shown, check drive belt tension at a different location on the belt.
GI
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ENGINE MAINTENANCE
Checking Drive Belts
MA-13

SMA857C
SMA858C
Changing Engine CoolantNBMA0011WARNING:
To avoid the danger of being scalded, never change the cool-
ant when the engine is hot.
ÐDRAINING ENGINE COOLANTÐNBMA0011S011. Set air conditioning system as follows to prevent coolant from
remaining in the system.
a. Turn ignition switch ªONº and set temperature controller to
maximum hot position.
b. Wait 10 seconds before turning ignition switch ªOFFº.
2. Open radiator drain plug at the bottom of radiator.
3. Remove radiator filler cap.
Remove reservoir tank, drain coolant, then clean reservoir
tank.
Install it temporarily.
IBe careful not to allow coolant to contact drive belts.
SMA092D
SMA093D
SMA094DA
4. Open drain plugs on right side of cylinder block and water
pump side, then open air relief plugs to drain coolant.
5. Check drained coolant for contaminants such as rust, coorro-
sion or discoloration. If contaminated flush engine cooling
system, ªRefer to FLUSHING COOLING SYSTEMº, MA-16.
ENGINE MAINTENANCE
Changing Engine Coolant
MA-14

Checking Seat Belts, Buckles, Retractors,
Anchors and Adjusters
NBMA0037
SMA854CE
CHASSIS AND BODY MAINTENANCE
Checking Seat Belts, Buckles, Retractors, Anchors and Adjusters
MA-28

Engine Maintenance
DRIVE BELT DEFLECTIONNBMA0038Unit: mm (in)
Used belt deflection
Deflection of new belt
Limit Deflection after adjustment
Alternator
Power steering oil pump
Fan7 (0.28)4 - 5 (0.16 - 0.20) 3.5 - 4.5 (0.138 - 0.177)
Air conditioner compressor 12 (0.47) 9 - 10 (0.35 - 0.39)8 - 9 (0.31 - 0.35)
Applied pushing force 98 N (10 kg, 22 lb)
DRIVE BELT TENSIONNBMA0042Unit: N (kg, lb)
Used belt
New belt
Limit After adjustment
Generator
Power steering oil pump
Fan294 (30, 66) 730 - 818 (74.4 - 83.5, 164 - 184) 838 - 926 (85.4 - 94.5, 188 - 208)
Air conditioner compressor 196 (20, 44) 348 - 436 (35.5 - 44.5, 78 - 98) 470 - 559 (47.9 - 57.0, 106 - 126)
SPARK PLUG TYPENBMA0039
Symbol Make
Standard type PLFR5A-11 NGK
Cold type PLFR6A-11 NGK
Hot type PLFR4A-11 NGK
Plug gap (Nominal) 1.1 mm (0.043 in)
Chassis and Body Maintenance
WHEEL BALANCENBMA0040
Maximum allowable unbalanceDynamic (At rim flange) g (oz) 10 (0.35) (one side)
Static g (oz) 20 (0.71)
GI
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
SERVICE DATA AND SPECIFICATIONS (SDS)
Engine Maintenance
MA-29

RESTRAINT SYSTEM
SECTION
RS
CONTENTS
SEAT BELTS...................................................................3
Precautions ..................................................................3
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
²AIR BAG²AND²SEAT BELT PRE-TENSIONER²
........3
PRECAUTION FOR SEAT BELT SERVICE..................3
Front Seat Belt.............................................................4
REMOVAL AND INSTALLATION.................................4
Rear Seat Belt .............................................................5
REMOVAL AND INSTALLATION.................................5
Seat Belt Inspection.....................................................7
AFTER A COLLISION.................................................7
PRELIMINARY CHECKS............................................7
SEAT BELT RETRACTOR ON-VEHICLE CHECK.........8
SEAT BELT RETRACTOR OFF-VEHICLE CHECK.......8
SUPPLEMENTAL RESTRAINT SYSTEM (SRS).........10
Precautions ................................................................10
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
²AIR BAG²AND²SEAT BELT PRE-TENSIONER²
......10
PRECAUTIONS FOR SRS²AIR BAG²AND²SEAT
BELT PRE-TENSIONER²SERVICE
...........................10
WIRING DIAGRAMS AND TROUBLE DIAGNOSIS.....10
Preparation ................................................................ 11
SPECIAL SERVICE TOOLS...................................... 11
Description .................................................................12
Seat Belt Pre-tensioner with Load Limiter.................12
Built-in Type Side Air Bag..........................................13
SRS Component Parts Location ...............................13
Maintenance Items ....................................................14
Diagnosis Sensor Unit ...............................................15
REMOVAL AND INSTALLATION...............................15
Seat Belt Pre-tensioner .............................................15
REMOVAL AND INSTALLATION...............................15
Satellite Sensor..........................................................16
REMOVAL AND INSTALLATION...............................16
Driver Air Bag Module and Spiral Cable ...................17
REMOVAL AND INSTALLATION...............................17
REMOVAL...............................................................17
INSTALLATION........................................................18
Front Passenger Air Bag Module ..............................19
REMOVAL...............................................................19
INSTALLATION........................................................20
Side Air Bag Module ..................................................21
REMOVAL...............................................................21
INSTALLATION........................................................22
Disposal of Air Bag Module and Seat Belt Pre-
tensioner ....................................................................22
CHECKING DEPLOYMENT TOOL.............................23
DEPLOYMENT PROCEDURES FOR AIR BAG
MODULE (OUTSIDE OF VEHICLE)
...........................24
DEPLOYMENT PROCEDURES FOR SEAT BELT
PRE-TENSIONER (OUTSIDE OF VEHICLE)
..............27
DEPLOYMENT OF AIR BAG MODULE AND SEAT
BELT PRE-TENSIONER WHILE MOUNTED IN
VEHICLE
.................................................................27
DISPOSING OF AIR BAG MODULE AND SEAT
BELT PRE-TENSIONER
...........................................28
Trouble Diagnoses Introduction.................................29
DIAGNOSIS FUNCTION...........................................29
DIAGNOSIS MODE FOR CONSULT-II.......................29
HOW TO CHANGE SELF-DIAGNOSIS MODE
WITH CONSULT-II
...................................................30
HOW TO CHANGE SELF-DIAGNOSIS MODE
WITHOUT CONSULT-II
............................................30
HOW TO ERASE SELF-DIAGNOSIS RESULTS.........30
How to Perform Trouble Diagnoses for Quick
and Accurate Repair ..................................................32
INFORMATION FROM CUSTOMER..........................32
PRELIMINARY CHECK............................................32
WORK FLOW..........................................................33
Schematic ..................................................................34
Wiring Diagram - SRS -.............................................35
SRS Operation Check ...............................................38
DIAGNOSTIC PROCEDURE 1..................................38
Trouble Diagnoses with CONSULT-II...................39
DIAGNOSTIC PROCEDURE 2..................................39
DIAGNOSTIC PROCEDURE 3..................................42
DIAGNOSTIC PROCEDURE 4 (CONTINUED
FROM DIAGNOSTIC PROCEDURE 2)
......................44
DIAGNOSTIC PROCEDURE 5..................................44
Trouble Diagnoses without CONSULT-II..............48
DIAGNOSTIC PROCEDURE 6..................................48
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
BT
HA
SC
EL
IDX

Precautions
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ªAIR BAGº AND ªSEAT BELT
PRE-TENSIONERº
NBRS0001The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS composition which is available to INFINITI QX4 is as follows:
IFor a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
IFor a side collision
The Supplemental Restraint System consists of side air bag module (located in the outer side of front seat),
satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring harness,
warning lamp (one of components of air bags for a frontal collision).
WARNING:
ITo avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed
by an authorized INFINITI dealer.
IImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
IDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
PRECAUTION FOR SEAT BELT SERVICENBRS0002CAUTION:
IBefore removing the seat belt pre-tensioner assembly, turn the ignition switch off, disconnect both
battery cables and wait at least 3 minutes.
IDo not use electrical test equipment for seat belt pre-tensioner connector.
IAfter replacing or reinstalling seat belt pre-tensioner assembly, or reconnecting seat belt pre-ten-
sioner connector, check the system function. Refer to ªSRS Operation Checkº (RS-38) for details.
IDo not use disassemble buckle or seat belt assembly.
IReplace anchor bolts if they are deformed or worn out.
INever oil tongue and buckle.
IIf any component of seat belt assembly is questionable, do not repair. Replace the whole seat belt
assembly.
IIf webbing is cut, frayed, or damaged, replace seat belt assembly.
IWhen replacing seat belt assembly, use a genuine seat belt assembly.
After A CollisionNBRS0002S01WARNING:
Inspect all seat belt assemblies including retractors and attaching hardware after any collision.
NISSAN recommends that all seat belt assemblies in use during a collision be replaced unless the
collision was minor and the belts show no damage and continue to operate properly. Failure to do so
could result in serious personal injury in an accident. Seat belt assemblies not in use during a colli-
sion should also be replaced if either damage or improper operation is noted. Seat belt pre-tensioner
should be replaced even if the seat belts are not in use during a frontal collision in which the air bags
are deployed.
Replace any seat belt assembly if:
IThe seat belt was in use at the time of a collision (except for minor collisions and the belts, retractors and
buckles show no damage and continue to operate properly).
IThe seat belt was damaged in an accident. (i.e. torn webbing, bent retractor or guide, etc.)
IThe seat belt attaching point was damaged in an accident. Inspect the seat belt attaching area for dam-
age or distortion and repair as necessary before installing a new seat belt assembly.
IAnchor bolts are deformed or worn out.
IThe seat belt pre-tensioner should be replaced even if the seat belts are not in use during the collision in
which the air bags are deployed.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
BT
HA
SC
EL
IDX
SEAT BELTS
Precautions
RS-3