1999 NISSAN MAXIMA ECU

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.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
N (Neutral) position. For an automatic
transmission, move the selector lever
to P (Park) position.
IBe sure the ignition key is OFF or
LOCK when performing any parts re-
placement or repairs.
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.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 remove necktie 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.
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 the bat-
tery.
IOn gasoline engine models with the
Multiport Fuel Injection (MFI) System,
the fuel filter or fuel lines should be
serviced by a NISSAN dealer becausethe fuel lines are under high pressure
even when the engine is off.
IDo not work under the hood while the
engine 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
local regulations for disposal of ve-
hicle fluid.This ª8. Do-it-yourselfº section gives instruc-
tions regarding only those items which are
relatively easy for an owner to perform.
MAINTENANCE PRECAUTIONS8-2
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CHANGING ENGINE COOLANTIMajor cooling system repairs should be
performed by your NISSAN dealer. The
service procedures can be found in the
appropriate NISSAN Service Manual.IImproper servicing can result in reduced
heater performance and engine overheat-
ing.
ITo avoid the danger of being scalded,
never change the coolant when the
engine is hot.
INever remove the radiator cap when
the engine is hot. Serious burns
could be caused by high pressure
fluid escaping from the radiator.1. Open the radiator cap and drain plug.
2. Open the drain plug on the engine block.
3. Flush the cooling system by running fresh
water through the radiator.
4. Close the radiator drain plug and the drain
plug on the engine block securely.
5. See ªCapacities and recommended
fuel/lubricantsº in the ª10. Technical and
consumer informationº section for cooling
system capacity. Fill the radiator slowly with
the proper mixture of coolant and water. Fill
the reservoir tank up to the MAX level. Then
install the radiator cap.
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6. Remove the drain plug with a wrench and
completely drain the oil.
If oil filter is to be changed, remove and
replace it at this time. See later in ªEngine
oilº for changing engine oil filter.Be careful not to burn yourself, as the
engine oil is hot.Waste oil must be disposed of properly.
Check your local regulations.
7. Clean and re-install the drain plug and new
washer. Securely tighten the drain plug with
a wrench.
Drain plug tightening torque:
22 to 29 ft-lb
(29 to 39 N×m)
Do not use excessive force.
8. Refill engine with recommended oil and
install the 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 capacitydepends 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.
9. Start the engine.
Check for leakage around the drain plug.
Correct as required.
10.Turn the engine off and wait more than 10
minutes. Check the oil level with the dip-
stick. Add engine oil if necessary.
11.Dispose of waste oil in the proper manner.
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.
(Depending on the engine model, a special
cap typewrench may be required. See
your NISSAN dealer if in doubt.) Remove
the oil filter by turning it by hand.
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Type B:
To check the fluid level, use your finger to plug
the center hole of the cap (as shown above),
then remove it from the tank. If there is no fluid
in the tube, add fluid. 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.
Anti-freeze is poisonous and should be
stored carefully in marked containers
out of the reach of children.Do not substitute engine anti-freeze
coolant for window washer solution.
This may result in damage to the paint.
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.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.
IKeep the battery out of the reach of
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BATTERY
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Be sure the ignition key is OFF. The
engine could rotate unexpectedly.1. Visually inspect each belt for signs of un-
usual wear, cuts, fraying, oil adhesion or
looseness. If the belt is in poor condition or
loose, have it replaced or adjusted by your
NISSAN dealer.
2. Have the belts checked regularly for condi-
tion and tension in accordance with the
maintenance schedule in this manual.
Be sure the engine and ignition switch
are off and that the parking brake is
engaged securely.Be sure to use the correct wrench to
remove the plugs. An incorrect wrench
can cause damage.
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DRIVE BELTS SPARK PLUGS
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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 may be prohibited according
to location. Check the local laws before install-
ing 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
damage your vehicle. Use chain tensioners
when recommended by the tire chain manu-
facturer to ensure a tight fit. Loose end links of
the tire chain must be secured or removed to
prevent the possibility of whipping action dam-
age to the fenders or undercarriage. If pos-
sible, avoid fully loading your vehicle when
using tire chains. In addition, drive at a re-
duced speed. Otherwise, your vehicle may be
damaged and/or vehicle handling and perfor-
mance may be adversely affected.
Never install tire chains on a T-type spare tire.
Do not use the chains on dry roads.
CHANGING TIRES AND WHEELS
Tire rotationNISSAN recommends that tires be rotated
every 7,500 miles (12,000 km).
Wheel nut tightening torque:
72 to 87 ft-lb (98 to 118 N×m)
See ªFlat tireº in the ª6. In case of emergencyº
section for tire replacing procedures.
IAfter rotating the tires, adjust the tire
pressure.
IRetighten the wheel nuts after the
aluminum wheels have been run for
the first 600 miles (1,000 km) (also in
cases of a flat tire, etc.).
IDo not include the T-type spare tire or
any other small size spare tire in the
tire rotation.
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During the normal day-to-day operation of the
vehicle, general maintenance should be per-
formed regularly as prescribed in this section.
If you detect any unusual sounds, vibrations or
smell, be sure to check for the cause or have
your NISSAN dealer do it promptly. In addition,
you should notify your NISSAN dealer if you
think that repairs are required.
When performing any checks or maintenance
work, see ªMaintenance precautionsº in the ª8.
Do-it-yourselfº section.EXPLANATION OF MAINTENANCE
ITEMSAdditional information on the following
items with ª*º is found in the ª8. Do-it-
yourselfº section.Outside the vehicleThe maintenance items listed here should be
performed from time to time, unless otherwise
specified.
Tires*:Check the pressure with a gauge pe-
riodically when at a service station, including
the spare, and adjust to the specified pressure
if necessary. Check carefully for damage, cuts
or excessive wear.
Wheel nuts*:When checking the tires, makesure 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).
Wheel alignment and balance:If 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.
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 smoothly as well
as the trunk lid or back hatch. Also make sure
that all latches lock securely. Lubricate if nec-
essary. Make sure that the secondary latch
keeps the hood from opening when the pri-
mary latch is released.
When driving in areas using road salt or other
corrosive materials, check lubrication fre-
quently.
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.
Lights*: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.
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 good quantity when operating the heater or
air conditioner.
Steering wheel:Check for changes in the
steering conditions, such as excessive free
play, hard steering or strange noises.
Seats:Check seat position controls such as
seat adjusters, seatback recliner, etc. to en-
sure they operate smoothly and that all latches
lock securely in every position. Check that the
head restraints move up and down smoothly
GENERAL MAINTENANCE
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and that the locks (if equipped) hold securely
in all latched positions.
Seat belts:Check that all parts of the seat belt
system (for example, buckles, anchors, adjust-
ers and retractors) 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 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
play.
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 sure to
keep floor mats away from the pedal.
Parking brake*:Check that the lever has the
proper travel and make sure that the vehicle is
held securely on a fairly steep hill when onlythe parking brake is applied.
Automatic transmission P (Park) position
mechanism:Check that the brake pedal must
be depressed for the selector lever to be
moved from the P (Park) position. On a fairly
steep hill check that the vehicle is held se-
curely with the selector lever in the P (Park)
position without applying any brakes.
Under the hood and the vehicleThe maintenance items listed here should be
checked periodically (for example, each time
you check the engine oil or refuel).
Windshield washer fluid*:Check that there
is adequate fluid in the tank.
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, dete-
rioration or loose connections.
Brake and clutch fluid levels*:Make sure
that the brake and clutch fluid levels are be-
tween the MAX and MIN lines on the reservoir.
Battery*:Check the fluid level in each cell. Itshould be between the MAX and MIN lines.
Engine drive belts*:Make sure that no belt is
frayed, worn, cracked or oily.
Engine oil level*:Check the level on the
dipstick 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.
Power steering fluid level* and lines:Check
the level in the reservoir tank with the engine
off. Check the lines for proper attachment,
leaks, cracks, etc.
Automatic transmission fluid level*:Check
the level on the dipstick after putting the selec-
tor lever in P (Park) position with the engine
idling.
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 mon-
oxide).)
Underbody:The underbody is frequently ex-
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