ECU NISSAN PATHFINDER 2003 R50 / 2.G Workshop Manual

erate properly and smoothly, and are installed
securely. Check the belt webbing for cuts, fray-
ing, wear or damage.
Accelerator pedal:
Check the pedal for smooth operation and make
sure the pedal does not catch or require uneven
effort. Keep the floor mats away from the pedal.
Clutch pedal*:
Make sure the pedal operates smoothly and
check that it has the proper free travel.
Brakes:
Check that the brakes do not pull the vehicle to
one side when applied.
Brake pedal and booster*:
Check the pedal for smooth operation and make
sure it has the proper distance under it when
depressed fully. Check the brake booster func-
tion. Be certain to keep floormats away from the
pedal.
Parking brake*:
Check that the lever has the proper travel and
confirm that your vehicle is held securely on a
fairly steep hill with only the parking brake ap-
plied.Automatic transmission P (Park) position
mechanism:
On a fairly steep hill check that your vehicle is
held securely with the selector lever in the P
position without applying any brakes.
Under the hood and vehicleThe maintenance items listed here should be
checked periodically e.g. each time you check
the engine oil or refuel.
Windshield washer fluid*:
Check that there is adequate fluid in the tank.
Engine oil level*:
Check the level after parking the vehicle on a
level spot and turning off the engine. (Be sure to
wait a few minutes to allow the oil to drain back
into the sump.)
Brake and clutch fluid levels*:
Make sure that the brake and clutch fluid level is
between the MAX and MIN lines on the reservoir.
Power steering fluid level* and lines:
Check the level when the fluid is cold and the
engine is turned off. Check the lines for proper
attachment, leaks, cracks, etc.Automatic transmission fluid level*:
Check the level after putting the selector lever in
P (Park) with the engine idling.
Engine coolant level*:
Check the coolant level when the engine is cold.
Radiator and hoses:
Check the front of the radiator and clean off any
dirt, insects, leaves, etc., that may have accumu-
lated. Make sure the hoses have no cracks,
deformation, rot or loose connections.
Engine drive belts*:
Make sure that no belt is frayed, worn, cracked
or oily.
Battery*:
Check the fluid level in each cell. It should be
between the MAX and MIN lines.
Vehicles operated in high temperatures or under
severe conditions require frequent checks of the
battery fluid level.
Exhaust system:
Make 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. See “Precau-
tions when starting and driving” in the “5. Start-
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ing and driving” section for exhaust gas (carbon
monoxide).
Underbody:
The underbody is frequently exposed to corro-
sive 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 ex-
haust system. At the end of winter, the under-
body should be thoroughly flushed with plain
water, being careful to clean those areas where
mud and dirt may accumulate. For additional
information, see “Cleaning exterior” in the “7.
Appearance and care” section.
Fluid leaks:
Check 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 if gasoline fumes are evident,
check for the cause and have it corrected imme-
diately.When performing any inspection or maintenance
work on your vehicle, always take care to prevent
serious accidental injury to yourself or damage to
the vehicle. The following are general precau-
tions which should be closely observed.
WARNING

Park the vehicle on a level surface,
apply the parking brake securely and
block the wheels to prevent the ve-
hicle from moving. For a manual
transmission, move the shift lever to
Neutral. For an automatic transmis-
sion, move the selector lever to the P
(Park) position.

Be sure the ignition key is in the OFF
or LOCK position when performing
any replacement or repair.

If you must work with the engine
running, keep your hands, clothing,
hair and tools away from moving fans
belts and any other moving parts.

It is advisable to secure or remove
any loose clothing and any jewelry,such as rings, watches, etc. before
working on your vehicle.

Always wear eye protection when-
ever you work on your vehicle.

If you must run the engine in an
enclosed space such as a garage, be
sure there is proper ventilation for
exhaust gases to escape.

Never get under the vehicle while it is
supported only by a jack. If it is nec-
essary to work under the vehicle,
support it with safety stands.

Keep smoking materials, flame and
sparks away from fuel and battery.

Your vehicle is equipped with an au-
tomatic engine cooling fan. It may
come on at any time without warning,
even if the ignition key is in the OFF
position and the engine is not run-
ning. To avoid injury, always discon-
nect the negative battery cable be-
fore working near the fan.

On gasoline engine models with theMAINTENANCE PRECAUTIONS
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3. Open the air release plug(s) to drain the
coolant.
4. Flush the cooling system by running fresh
water through the radiator.

Waste coolant must be disposed of
properly.

Check your local regulations.
5. Close the radiator drain plugs and engine
block drain plugs securely.
6. See the “9. Technical and consumer informa-
tion” section for cooling system capacity.
Fill the radiator slowly with the proper mixtureof coolant and water. Fill the reservoir tank
slowly up to the MAX level. Then install the
radiator cap and close the air release plug(s).
7. Start the engine and warm it up until it
reaches normal operating temperature. Then
race the engine 2 or 3 times under no load.
Watch the coolant temperature gauge for
signs of overheating.
8. Stop the engine. After it completely cools
down, refill the radiator up to the filler open-
ing. Fill the reservoir tank up the MAX level.
9. Check the radiator drain plug and engine
block drain plugs for any sign of leakage.
SDI1110SDI1189
SDI0419
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washer. Securely tighten the drain plug with a
wrench. Do not use excessive force.
Drain plug tightening torque:
22 to 29 ft-lb (29 to 39 N⋅m)
7. Refill engine with recommended oil through
the oil filler opening, then install the oil filler
cap securely.
See “Capacities and recommended
fuel/lubricants” in the “9. Technical and con-
sumer information” section for drain and refill
capacity.
The drain and refill capacity depends on the
oil temperature and drain time. Use these
specifications for reference only. Always use
the dipstick to determine when the proper
amount of oil is in the engine.
8. Start the engine.
Check for leakage around the drain plug.
Correct as required.
9. Turn the engine off and wait more than 10
minutes. Check the oil level with the dipstick.
Add engine oil if necessary.
WARNING

Prolonged and repeated contact withused engine oil may cause skin can-
cer.

Try to avoid direct skin contact with
used oil. If skin contact is made,
wash thoroughly with soap or hand
cleaner as soon as possible.

Keep used engine oil out of reach of
children.
CHANGING ENGINE OIL FILTER1. Park the vehicle on a level surface and apply
the parking brake.
2. Turn the engine off.
3. Loosen the oil filter with an oil filter wrench.
(Depending on the engine model, a special
cap-type wrench may be required. See your
NISSAN dealer.) Then remove the oil filter by
turning it by hand.
SDI1113
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Keep the battery surface clean and dry. Any
corrosion should be washed off with a solu-
tion of baking soda and water.

Make certain the terminal connections are
clean and securely tightened.

If the vehicle is not to be used for 30 days or
longer, disconnect the (—) negative battery
terminal cable to prevent discharge.
WARNING

Do not expose the battery to flames
or electrical sparks. Hydrogen gas
generated by battery action is explo-
sive. Do not allow battery fluid to
contact your skin, eyes, fabrics, or
painted surfaces. After touching a
battery or battery cap, do not touch
or rub your eyes. Thoroughly wash
your hands. If the acid contacts your
eyes, skin or clothing, immediately
flush with water for at least 15 min-
utes and seek medical attention.

When working on or near a battery,
always wear suitable eye protection
and remove all jewelry.
Battery posts, terminals and related
accessories contain lead and lead
compounds. Wash hands after han-
dling.

Keep the battery out of the reach of
children.

Do not operate the vehicle if the fluid
in the battery is low. Low battery fluid
can cause a higher load on the bat-
tery which can generate heat, reduce
battery life, and in some cases lead
to an explosion.
JUMP STARTINGIf jump starting is necessary, see “Jump starting”
in the “6. In case of emergency” section. If the
engine does not start by jump starting, the
battery may have to be replaced. Contact your
NISSAN dealer.Check the fluid level in each cell. It should be
between the MAX. and MIN. lines.
If it is necessary to add fluid, add only distilled
water to bring the level to the indicator in each
filler opening.Do not overfill.
1. Remove the cell plugs using a suitable tool.
2. Add distilled water up to the MAX. level.
If the side of the battery is not visible, the
electrolyte level can be checked through
each filler opening as illustrated.
3. Tighten cell plugs.
Vehicles operated in high temperatures or
DI0137M
BATTERY
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REPLACING SPARK PLUGS
WARNING
Be sure the engine and ignition switch
are off and that the parking brake is
engaged securely.
CAUTION
Be sure to use the correct socket toremove the spark plugs. An incorrect
socket can cause damage the spark
plugs.
Platinum-tipped spark plugsIt is not necessary to replace the platinum-
tipped spark plugs as frequently as the conven-
tional type spark plugs since they will last much
longer. Follow the maintenance schedule, but do
not reuse them by cleaning or regapping.
If replacement is required, see your NISSAN
dealer for servicing.
Always replace with recommended
platinum-tipped spark plugs.The filter element should not be cleaned and
reused as it is given a special treatment. We
recommended it be replaced according to the
maintenance log shown in a separate “Service
and Maintenance Guide”. When replacing the
filter, wipe the inside of the air cleaner housing
and the cover with a damp cloth.
WARNING

Operating the engine with the air
cleaner removed can cause you or
others to be burned. The air cleaner
SDI0145A
SDI1022A
SDI1115B
SPARK PLUGS AIR CLEANER
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Recommended battery: Sanyo CR2025 or
equivalent
Make sure that the⊕side faces the
bottom case.
3. Close the lid securely.
4. Push the keyfobbutton two or three times to
check its operation.
See your NISSAN dealer if you need any assis-
tance for replacement.
If the battery is removed for any reason
other than replacement, perform step 4
above.

Be careful not to touch a circuit board
and a battery terminal.

An improperly disposed battery can
harm the environment. Always confirm
local regulations for battery disposal.

The keyfob is water-resistant; however,
if it does get wet, immediately wipe
completely dry.

When changing batteries, do not let
dust or oil get on the controller.
FCC Notice:
Changes or modifications not expressly
approved by the manufacturer compliancecould void the user’s authority to operate
the equipment.
This device complies with Part 15 of the
FCC Rules and RSS-210 of Industry
Canada.
Operation is subject to the following two
conditions: (1) This device may not cause
harmful interference, and (2) this device
must accept any interference received, in-
cluding interference that may cause undes-
ired operation of the device.
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year around, including snowy and icy road con-
ditions. All season tires are identified by ALL
SEASON and/or M&S on the tire sidewall. Snow
tires have better snow traction than all season
tires and may be more appropriate in some
areas.Summer tiresNISSAN specifies summer tires on some models
to provide superior performance on dry roads.
Summer tire performance in snow and ice will be
substantially reduced. Summer tires do not have
the tire traction rating M&S on the tire sidewall.
If you operate your vehicle in snowy or icy
conditions, NISSAN recommends the use of
SNOW or ALL SEASON tires on all four wheels.Snow tiresIf snow tires are needed, it is necessary to select
tires equivalent in size and load rating to the
original equipment tires. If you do not, it can
adversely affect the safety and handling of your
vehicle.
Generally, snow tires will have lower speed
ratings than factory equipped tires and may not
match the potential maximum vehicle speed.
Never exceed the maximum speed rating of the
tire.
If you install snow tires on four wheel drivemodels, they must also be the same size, brand,
construction and tread pattern on all four
wheels.
If you operate your vehicle in snowy or icy
conditions, NISSAN recommends the use of
SNOW or ALL SEASON tire on all four wheels.
For additional traction on icy roads, studded tires
may be used. However, some provinces and
states prohibit their use. Check local, state and
provincial laws before installing studded tires.
Skid and traction capabilities of studded snow
tires, on wet or dry surfaces, may be poorer than
that of non-studded snow tires.
TIRE CHAINSUse of tire chains is prohibited according to
location. Check the local laws before installing
tire chains. When installing tire chains, make
sure they are of proper size for the tires on your
vehicle and are installed according to the chain
manufacturer’s suggestions.Use only SAE
class S chains.Class “S” chains are used on
vehicles with restricted tire to vehicle clearance.
Vehicles that can use Class “S” chains are
designed to meet the SAE standard minimum
clearances between the tire and the closest
vehicle suspension or body component required
to accommodate the use of a winter traction
device (tire chains or cables). The minimum
clearances are determined using the factoryequipped tire size. Other types may damage
your vehicle. Use chain tensioners when recom-
mended by the tire chain manufacturer to ensure
a tight fit. Loose end links of the tire chain must
be secured or removed to prevent the possibility
of whipping action damage to the fenders or
underbody. If possible, avoid fully loading your
vehicle when using tire chains. In addition, drive
at a reduced speed. Otherwise, your vehicle may
be damaged and/or vehicle handling and perfor-
mance may be adversely affected.
Never install tire chains on TEMPORARY USE
ONLY spare tires.
Do not use tire chains on dry roads.
Tire chains must be installed only on the
rear wheels and not on the front wheels.
Do not drive with tire chains on paved roads
which are clear of snow. Driving with chains in
such conditions can cause damage to the vari-
ous mechanisms of the vehicle due to some
overstress. When driving on clear paved roads,
be sure to change to 2WD.
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9 Technical and consumer informationCapacities and recommended fuel/lubricants ................ 9-2
Fuel recommendation ...................................................... 9-4
Engine oil and oil filter recommendation.................... 9-6
Recommended SAE oil viscosity number.................. 9-7
Air conditioning system refrigerant and lubricant
recommendations ............................................................. 9-8
Specifications.......................................................................... 9-9
Engine ................................................................................. 9-9
Wheels and tires ................................................................. 9-11
Dimensions and weights.............................................. 9-11
When traveling or registering your vehicle in another
country.................................................................................... 9-12
Vehicle identification ........................................................... 9-12
Vehicle identification number (VIN) plate ................ 9-12
Vehicle identification number (Chassis
number) ............................................................................ 9-12
Engine serial number .................................................... 9-13
F.M.V.S.S. certification label ....................................... 9-13
Emission control information label ............................ 9-14
Tire placard ..................................................................... 9-14Air conditioner specification label ............................. 9-14
Vehicle loading information ............................................... 9-15
Terms ................................................................................ 9-15
Determining vehicle payload capacity ...................... 9-15
Securing the load .......................................................... 9-16
Loading tips .................................................................... 9-16
Payload weight capacity .............................................. 9-17
Measurement of weights ............................................. 9-17
Towing a trailer .................................................................... 9-17
Maximum load limits ...................................................... 9-17
Towing load/specification chart ................................. 9-19
Towing safety.................................................................. 9-19
Uniform tire quality grading ......................................... 9-21
Emission control system warranty ................................... 9-22
Reporting safety defects (US only) ................................ 9-22
Readiness for inspection/maintenance (I/M) test
(US only) ................................................................................ 9-23
Owner’s Manual/Service Manual order information ... 9-25
In the event of a collision ............................................ 9-25


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SECURING THE LOADThere are tie down hooks located in the cargo
area. The tie down hooks can be used to secure
cargo with ropes or other types of straps.
Do not apply a total load of more than 22
lbs. (10 kg) to a single hook when securing
cargo.
LOADING TIPS
The GVW must not exceed GVWR or
GAWR as specified on the FMVSS Certifi-
cation Label located on the driver’s door
center pillar.

Do not load the front and rear axle to the
GAWR. Doing so will exceed the GVWR.

Loads should be spread out, and cargo
should be properly secured. Large or heavy
objects should be placed toward the front of
the cargo area to help prevent sliding or
shifting.
WARNING

Properly secure all cargo to help pre-
vent it from sliding or shifting. Do not
place cargo higher than the seat-
backs. In a sudden stop or collision,
unsecured cargo could cause per-
sonal injury.

Do not load your vehicle any heavier
than the GVWR or the maximum front
and rear GAWRs. If you do, parts on
your vehicle can break, or it can
change the way your vehicle handles.
SPA0408A
SPA0365
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