ECU NISSAN PATHFINDER 2000 R50 / 2.G Service Manual

When performing any inspection or mainte-
nance work on your vehicle, always take care
to prevent serious accidental injury to yourself
or damage to the vehicle. The following are
general precautions which should be closely
observed.
WARNING
IPark 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.
IBe sure the ignition key is in the OFF
or LOCK position when performing
any replacement or repair.
IIf you must work with the engine
running, keep your hands, clothing,
hair and tools away from moving fans
belts and any other moving parts.
IIt is advisable to secure or remove
any loose clothing and any jewelry,such as rings, watches, etc. before
working on your vehicle.
IAlways wear eye protection when-
ever you work on your vehicle.
IIf you must run the engine in an
enclosed space such as a garage, be
sure there is proper ventilation for
exhaust gases to escape.
INever 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.
IKeep smoking materials, flame and
sparks away from fuel and battery.
IYour 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 before
working near the fan.
IOn gasoline engine models with themultiport fuel injection (MFI) system,
the fuel filter or fuel lines should be
serviced by a NISSAN dealer because
the fuel lines are under high pressure
even when the engine is off.
CAUTION
IDo not work under the engine hood
while it is hot. Turn off the engine and
wait until it cools down.
INever connect or disconnect either
the battery or any transistorized com-
ponent connector while the ignition
key is on.
INever leave the engine or the auto-
matic transmission related compo-
nent harness connector discon-
nected while the ignition key is on.
IAvoid direct contact with used engine
oil. Improperly disposed motor oil and/
or other vehicle fluids can hurt the
environment. Always conform to lo-
MAINTENANCE PRECAUTIONS8-2
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3. Open the air release plug to drain the
coolant.
4. Flush the cooling system by running fresh
water through the radiator.
5. Close the radiator drain plug and engine
block drain plugs securely.
6. See the ªTechnical informationº section for
cooling system capacity.
Fill the radiator slowly with the proper mix-
ture of coolant and water. Fill the reservoir
tank slowly up to the MAX level. Then install
the radiator cap and close the air release
plug.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
opening. Fill the reservoir tank up the MAX
level.
9. Check the radiator drain plug and engine
block drain plugs for any sign of leakage.
CHECKING ENGINE OIL LEVEL1. Park the vehicle on a level surface and
apply the parking brake.
2. Run the engine until it reaches operating
temperature.
3. Turn off the engine.Wait more than 10
minutes for the oil to drain back into the
oil pan.
4. Remove the dipstick and wipe it clean.
Reinsert it all the way.
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SDI0419
SDI0420
ENGINE OIL
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section for changing engine oil filter.
CAUTION
Be careful not to burn yourself, as the
engine oil is hot.
Waste oil must be disposed of properly.
Check your local regulations.
6. Clean and re-install the drain plug and new
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 ªCapacities and recommended
fuel/lubricantsº in the ª10. Technical and
consumer informationº 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 several min-
utes. Check the oil level with the dipstick.
Add engine oil if necessary.
WARNING
IProlonged and repeated contact with
used engine oil may cause skin can-
cer.
ITry to avoid direct skin contact with
used oil. If skin contact is made, wash
thoroughly with soap or hand cleaner
as soon as possible.
IKeep 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.
(A specialcap-typewrench will assist with
oil filter removal on models with the V6
engine. This tool can be purchased from
your NISSAN dealer.) Then remove the oil
filter by turning it by hand.
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For CANADAAdd fluid when the low washer fluid warning
light comes on. Add a washer solvent to the
water for better cleaning. In the winter season,
add a windshield washer anti-freeze. Follow
the manufacturer's instructions for the mixture
ratio.
CAUTION
Do not substitute engine anti-freeze
coolant for window washer solution.This may result in damage to the paint.
WARNING
Anti-freeze is poisonous and should be
stored carefully marked containers out
of the reach of children.IKeep the battery surface clean and dry. Any
corrosion should be washed off with a
solution of baking soda and water.
IMake certain the terminal connections are
clean and securely tightened.
IIf the vehicle is not to be used for 30 days or
longer, disconnect the (Ð) negative battery
terminal cable to prevent discharge.
WARNING
IDo 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 minutes and
seek medical attention.
IWhen working on or near a battery,
always wear suitable eye protection
and remove all jewelry.
SDI0389
BATTERY
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tion and tension in accordance with the
maintenance schedule in this manual.
REPLACING SPARK PLUGS
Platinum-tipped spark plugsIt is not necessary to replace the platinum-
tipped spark plugs as frequently as the con-
ventional type spark plugs since they will last
much longer. Follow the maintenance sched-
ule, but do not reuse them by cleaning or
regapping.
If replacement is required, see your NISSAN
dealer for servicing.
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 to
remove the spark plugs. An incorrect
socket can cause damage the spark
plugs.
Always replace spark plugs with recom-
mended or equivalent ones.
SDI1022
SPARK PLUGS
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2. Replace the battery with a new one.
Recommended battery: Sanyo CR2025 or
equivalent
Make sure that theÅside faces the
bottom case.
3. Close the lid securely.
4. Push the remote controller button two or
three times to check its operation.
See your NISSAN dealer if you need any
assistance for replacement.
If the battery is removed for any reason
other than replacement, perform step 4
above.
IBe careful not to touch a circuit board
and a battery terminal.
IAn improperly disposed battery can
harm the environment. Always confirm
local regulations for battery disposal.
IThe remote controller is water-resistant;
however, if it does get wet, immediately
wipe completely dry.
IWhen changing batteries, do not let dust
or oil get on the controller.
FCC Notice:
Changes or modifications not expresslyapproved by the manufacturer compliance
could 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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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 drive
models, 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.Other types may dam-
age your vehicle. Use chain tensioners when
recommended by the tire chain manufacturerto 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 performance may
be adversely affected.
Never install tire chains on small size 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
various mechanisms of the vehicle due to
some overstress. When driving on clear paved
roads, be sure to change to 2WD.
CHANGING WHEELS AND TIRES
Tire rotationNISSAN recommends that tires be rotated
every 7,500 miles (12,000 km). However, the
timing for tire rotation may vary according to
your driving habits and road surface condi-
tions.
See ªFlat tireº in the ª6. In case of emergencyº
section for tire replacing procedures.
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Wheel nuts*:
When checking the tires, make sure no nuts
are missing, and check for any loose nuts.
Tighten if necessary.
Tire rotation*:
Tires should be rotated every 7,500 miles
(12,000 km). However, the timing for tire rota-
tion may vary according to your driving habits
and road surface conditions.
Wheel alignment and balance:
If the vehicle should pull 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.
Windshield wiper blades*:
Check for cracks or wear if they do not wipe
properly.
Doors and engine hood:
Check that all doors and the engine hood,
operate properly. Also ensure that all latches
lock securely. Lubricate hinges, latches, rollers
and links if necessary. Make sure that the
secondary latch keeps the hood from openingwhen the primary latch is released.
When driving in areas using road salt or other
corrosive materials, check lubrication fre-
quently.
Inside the vehicleLights*:
Make sure that the headlights, stop lights, tail
lights, turn signal lights, and other lights are all
operating properly and installed securely. Also
check headlight aim.INTERIOR MAINTENANCEThe maintenance items listed here should be
checked on a regular basis, such as when
performing periodic maintenance, cleaning the
vehicle, etc.
Warning lights and chimes:
Make sure that all warning lights and chimes
are operating properly.
Windshield wiper and washer*:
Check that the wipers and washer operate
properly and that the wipers do not streak.Windshield defroster:
Check that the air comes out of the defroster
outlets properly and in sufficient quantity when
operating the heater or air conditioner.
Steering wheel:
Check for changes in the steering conditions,
such as excessive freeplay, hard steering or
strange noises.
Seats:
Check seat position controls such as seat
adjusters, seatback recliner, etc. to ensure
they operate smoothly and that all latches lock
securely in every position. Check that the head
restraints move up and down smoothly and
that the locks (if so equipped) hold securely in
all latched positions.
Seat belts:
Check that all parts of the seat belt system
(e.g. buckles, anchors, adjusters and retrac-
tors) operate properly and smoothly, and are
installed securely. Check the belt webbing for
cuts, fraying, wear or damage.
Accelerator pedal:
Check the pedal for smooth operation and
make sure the pedal does not catch or require
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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 function. 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
applied.
Automatic transmission P 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
accumulated. 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.
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 ªPrecautions when starting and drivingº in
the ª5. Starting and drivingº section for exhaust
gas (carbon monoxide).
Underbody:
The underbody is frequently exposed to corro-
sive substances such as those used on icy
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IGVWR (Gross Vehicle Weight Rating) -
maximum total weight (load) limit specified
for the vehicle.
IGAWR (Gross Axle Weight Rating) - maxi-
mum weight (load) limit specified for the
front or rear axle.DETERMINING VEHICLE LOAD
CAPACITYThe load capacity of this vehicle is determined
by weight, not by available cargo space. For
example, a luggage rack, bike carrier, cartop
carrier or similar equipment does not increase
load carrying capacity of your vehicle.
To determine vehicle load capacity:
Vehicle weight can be determined by using a
commercial-grade scale, found at places such
as a truck stop, gravel quarry, grain elevator,
or a scrap metal recycling facility.
1) Determine the curb weight of your vehicle.
2) Compare the curb weight amount to the
GVWR specified for your vehicle to deter-
mine how much more weight your vehicle
can carry.
3) After loading (cargo and passengers), re-
weigh your vehicle to determine if either
GVWR or GAWR for your vehicle is ex-ceeded. If GVWR is exceeded, remove
cargo as necessary. If either the front or
rear GAWR is exceeded, shift the load or
remove cargo as necessary.
LOADING TIPSIThe GVW must not exceed GVWR or
GAWR as specified on the FMVSS Certifi-
cation Label.
IDo not load the front and rear axle to the
GAWR. Doing so will exceed the GVWR.
WARNING
IProperly 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.
IDo 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.
This could result in loss of control
and cause personal injury.IOverloading can shorten the life of
your vehicle. Failures caused by
overloading are not covered by your
warranty.
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