Engine control NISSAN SENTRA 1996 B14 / 4.G User Guide

WARNING
Do not leave children, unreliable
adults, or pets alone in your vehicle.
They could accidentally injure them-
selves or others through inadvertent
operation of the vehicle. Also, on hot,
sunny days, temperatures in a closed
vehicle could quickly become high
enough to cause severe or possibly
fatal injuries to people or animals.
EXHAUST GAS (Carbon monoxide)
WARNING
Do not breathe exhaust gases; they
contain colorless and odorless carbon
monoxide. Carbon monoxide is dan-
gerous. It can cause unconsciousness
or death.
cIf you suspect that exhaust fumes are
entering the vehicle, drive with all
windows fully open, and have the
vehicle inspected immediately.
cDo not run the engine in closed
spaces such as a garage for any
longer than is absolutely necessary.cDo not park the vehicle with the en-
gine running for any extended length
of time.
cKeep the trunk lid closed while driv-
ing, otherwise exhaust gases could
be drawn into the passenger com-
partment. If you must drive in this
manner for some reason, take the
following steps:
1. Open all the windows.
2. Set the air recirculate button (if so
equipped) ``OFF'' and the fan con-
trol dial to 4 (high) to circulate the
air.
cIf electrical wiring or other cable con-
nections must pass to a trailer
through the seal on the trunk lid or
the body, follow the manufacturer's
recommendation to prevent carbon
monoxide entry into the vehicle.
cThe exhaust system and body should
be inspected by a qualified mechanic
whenever:
a. The vehicle is raised for service.b. You suspect that exhaust fume-
sare entering into the passenger
compartment.
c. You notice a change in the sound
of the exhaust system.
d.
You have had an accident involv-
ing damage to the exhaust system,
underbody, or rear of the vehicle.
THREE WAY CATALYST
The three way catalyst is an emission control
device installed in the exhaust system. Ex-
haust gases in the converter are burned at
high temperatures to help reduce pollutants.
WARNING
cThe exhaust gas and the exhaust
system are very hot. While the engine
is running, keep people or flammable
materials away from the exhaust
pipe.
cDo not stop or park the vehicle over
flammable materials such as dry
grass, waste paper or rags, as they
may burn easily.
PRECAUTIONS WHEN
STARTING AND DRIVING
4-2
ZX

To help prevent damage
cDo not use leaded gasoline. Deposits
from leaded gasoline seriously reduce
the three way catalyst's ability to help
reduce exhaust pollutants.
cKeep your engine tuned up. Malfunc-
tions in the ignition, fuel injection, or
electrical systems can cause overrich
fuel flow into the converter, causing it
to overheat. Do not keep driving if the
engine misfires, or if noticeable loss
of performance or other unusual op-
erating conditions are detected. Have
the vehicle inspected promptly by an
authorized NISSAN dealer.
cAvoid driving with an extremely low
fuel level. Running out of fuel could
cause the engine to misfire, damaging
the three way catalyst.
cDo not race the engine while warming
it up.
cDo not push or tow your vehicle to
start the engine.Failure to operate this vehicle in a safe and
prudent manner may result in loss of control
or an accident. Be alert and drive defen-
sively at all times. Obey all traffic regula-
tions. Avoid excessive speed, high speed
cornering, or sudden steering maneuvers,
because these driving practices could
cause you to lose control of your vehicle.As
with any vehicle, a loss of control could
result in a collision with other vehicles or
objects, or cause the vehicle to rollover,
particularly if the loss of control causes
the vehicle to slide sideways.Be attentive
at all times, and avoid driving when tired.
Never drive when under the influence of
alcohol or drugs (including prescription or
over-the-counter drugs which may cause
drowsiness). Always wear your seat belt as
outlined in the ``Seat Belts'' section of this
manual, and also instruct your passengers
to do so.
WARNING
Alcohol in the blood stream reduces
coordination, delays reaction time and
impairs judgment. Driving after drink-
ing alcohol increases the likelihood of
being involved in an accident injuring
yourself and others. Additionally, if you
are injured in the accident alcohol can
increase the severity of injury.
Nissan is committed to safe driving. How-
ever, you must choose not to drive under
the influence of alcohol. Every year thou-
sands of people are injured or killed in
alcohol related accidents. Although the local
laws vary on what is considered to be
legally intoxicated, the fact is that alcohol
affects all people differently and most
people underestimate the effects of alcohol.
Remember, drinking and driving don't mix!
And that's true for drugs, too (over the
counter, prescription, and illegal drugs).
Don't drive if your ability to operate your
vehicle is impaired by alcohol, drugs, or
some other physical condition.
AVOIDING COLLISION AND
ROLLOVERDRINKING ALCOHOL/DRUGS
AND DRIVING
4-3
ZX

1) Move the shift lever into the P position.
2) Turn the ignition key slightly in the ON
direction.
3) Turn the key toward the LOCK position.
4) Remove the key.
If the key is removed from the ignition
switch, the shift lever cannot be moved from
P (Park).The shift lever can be moved if
the ignition switch is in the ACC posi-
tion. The shift lever can also be moved if
the ignition switch is in the ON position
and the foot brake pedal is depressed.
There is an OFF position in between LOCK
and ACC, although it does not show on the
lock cylinder. When the ignition is in OFF
the steering wheel is not locked.
In order for the steering wheel to be locked,
it must be turned about 1/8 of a turn coun-
terclockwise from the straight up position,
and the key must be removed from the
ignition.WARNING
To lock the steering wheel, remove the
key. To unlock the steering wheel, in-
sert the key and turn it gently while
rotating the steering wheel slightly
right and left.
Never remove the key while driving. If
the key is removed, the steering wheel
will lock. This may cause the driver to
lose control of the vehicle and could
result in serious vehicle damage or
personal injury.
OFF (Manual transmission model) (1)
The engine can be turned off without locking
the steering wheel.
ACC (Accessories) (2)
This position activates electrical accesso-
ries such as the radio when the engine is
not running.
ON Normal operating position (3)
This position turns on the ignition system
and the electrical accessories.
START (4)
This position activates the starter motor,
which starts the engine.cMake sure the area around the vehicle is
clear.
cMaintenance items listed here should be
checked periodically, e.g., each time you
check engine oil.
cCheck that all windows and lights are
clean.
cVisually inspect tires for their appearance
and condition. Also check tires for proper
inflation.
cLock all doors.
cPosition seat and adjust head restraints.
cAdjust inside and outside mirrors.
cFasten seat belts and ask all passengers
to do likewise.
cCheck the operation of warning lights
when key is turned to the ON (3) position.
BEFORE STARTING THE
ENGINE
4-5
ZX

The automatic transmission in your vehicle
(if so equipped) is electronically controlled
by a microcomputer to produce maximum
power and smooth operation.
Shown on the following pages are the rec-
ommended operating procedures for this
transmission. Follow these procedures for
maximum vehicle performance and driving
enjoyment.
Starting the vehicle
cAfter starting the engine, fully depress
the foot brake pedal before shifting the
shift lever to the D, R, 2 or 1 position. Be
sure the vehicle is fully stopped before
attempting to shift the shift lever.
This automatic transmission is designed
so the foot brake pedal MUST be de-
pressed before shifting from P to any
drive position while the ignition switch is
ON.
Normally, the shift lever cannot be
moved out of P and into any of the other
gear positions if the ignition key is
turned to LOCK or if the key is removed
from the switch.
When the battery charge is low, the shiftlever can be moved if the ignition switch
is in the ACC position.
1. Keep the foot brake pedal depressed and
shift into a driving gear.
2. Release the parking brake and foot
brake, then gradually start the vehicle in
motion.
cCold engine idle speed is high, so use
caution when shifting into a forward
or reverse gear before the engine has
warmed up.
cAvoid revving up the engine while the
vehicle is stopped. This could cause
unexpected vehicle movement.
Driving precautions
To help prevent transmission damage:
cDo not depress the accelerator pedal
while shifting from P or N to R, D, 2 or
1. Always depress the brake pedal
until shifting is completed.
cNever shift to P or R while the vehicle
is moving.
cWhen stopping the vehicle on an up-
hill grade, do not hold the vehicle by
depressing the accelerator pedal. Thefoot brake should be used for this
purpose.
DRIVING WITH AUTOMATIC
TRANSMISSION
4-6
ZX

For quick acceleration in high altitude areas
(over 4,000 ft [1,219 m]):
For GA16DE engine models:
Gear change MPH (km/h)
1st to 2nd 15 (25)
2nd to 3rd 35 (55)
3rd to 4th 45 (75)
4th to 5th 50 (80)
For SR20DE engine models:
1st to 2nd 15 (25)
2nd to 3rd 25 (40)
3rd to 4th 40 (65)
4th to 5th 45 (75)Suggested maximum speed in each
gear
Downshift to a lower gear if the engine is not
running smoothly, or if you need to acceler-
ate.
Do not exceed the maximum suggested
speed (shown below) in any gear. For level
road driving, use the highest gear sug-
gested for that speed. Always observe
posted speed limits, and drive according to
the road conditions, which will ensure safe
operation. Do not over-rev the engine when
shifting to a lower gear as it may cause
engine damage or loss of vehicle control.
GA16DE engine models:
Gear MPH (km/h)
1st 30 (50)
2nd 55 (90)
3rd 85 (135)
4th & 5th ÐSR20DE engine models:
Gear MPH (km/h)
1st 35 (55)
2nd 60 (95)
3rd 85 (135)
4th & 5th Ð
4-10
ZX

To reset at a slower cruising speed,use
one of the following three methods:
a) Lightly tap the brake pedal. When the
vehicle attains the desired speed, push
the COAST/SET switch and release it.
b) Push and hold the COAST/SET switch.
Release the switch when the vehicle
slows down to the desired speed.
c) Push, then quickly release the
COAST/SET switch. Each time you do
this, the set speed decreases by about 1
MPH (1.6 km/h).
To resume the preset speed,push and
release the RESUME switch. The vehicle
returns to the last set cruising speed when
the vehicle speed is over 30 MPH (48 km/h).
Precautions
cIf the cruise control system malfunctions,
it cancels automatically. The cruise indi-
cator light in the instrument panel then
blinks to warn the driver.
cWhen the cruise indicator light blinks,
turn the cruise control main switch off
and have the system checked by your
NISSAN dealer.cThe cruise indicator light may blink when
the cruise control main switch is turned
ON while pushing the RES/ACCEL,
COAST/SET, or CANCEL switch (lo-
cated on the steering wheel). To properly
set the cruise control system perform the
steps above in the order indicated.
Avoid using the cruise control when
driving under the following conditions:
cwhen it is not possible to keep the vehicle
at a set speed.
cin heavy traffic or in traffic that varies in
speed.
con winding roads, or hilly roads.
con slippery roads (rain, snow, ice, etc.).
cin very windy areas.
CAUTION
On manual transmission models, do
not shift into neutral without depress-
ing the clutch pedal when the cruise
control is on. Should this occur, de-
press the clutch pedal and turn the
main switch off immediately. Failure to
do so may cause engine damage.During the first 1,000 miles (1,600 km),
follow these recommendations for the future
reliability and economy of your new vehicle.
Failure to follow these recommendations
may result in vehicle damage or shortened
engine life.
cDo not drive over 55 MPH (90 km/h) and
do not run the engine over 4,000 rpm.
Avoid driving for long periods at constant
speed, either fast or slow.
cDo not accelerate at full throttle in any
gear.
cAvoid quick starts.
cAvoid hard braking as much as possible.
cDo not tow a trailer for the first 500 miles
(800 km).
BREAK-IN SCHEDULE
4-13
ZX

cDriving with vacuum assisted brakes:
The brake booster aids braking by using
engine vacuum. If the engine stops, you
can stop the vehicle by depressing the
brake pedal. However, greater foot pres-
sure on the brake pedal will be required
to stop the vehicle and the stopping
distance will be longer.
cDriving with the power assisted steer-
ing:
The power assisted steering is designed
to use a hydraulic pump, driven by the
engine, to assist steering.
If the engine stops or the drive belt
breaks, you will still have control of the
vehicle. However, much greater steering
effort is needed, especially in sharp turns
or at low speeds.
cWet brakes:
When the vehicle is washed or driven
through water, the brakes may get wet.
As a result, your braking distance will be
longer and the vehicle may pull to one
side during braking.
To dry brakes, drive the vehicle at a safe
speed while lightly pressing the brakepedal to heat-up the brakes. Do this until
the brakes return to normal. Avoid driving
the vehicle at high speeds until the
brakes function correctly.
cAvoid resting your foot on the brake
pedal while driving. This will overheat the
brakes, wear out the brake linings and
pads faster and reduce gas mileage.
cTo help save the brakes and to prevent
the brakes from overheating, reduce
speed and downshift to a lower gear
before going down a slope or long grade.
Overheated brakes may reduce braking
performance and could result in loss of
vehicle control.
cWhile driving on a slippery surface, be
careful when braking, accelerating or
downshifting. Abrupt braking actions or
sudden acceleration could cause the
wheels to skid.The anti-lock brake system controls the
brakes at each wheel so the wheels do not
lock when braking abruptly or when braking
on slippery surfaces. The system detects
the rotation speed at each wheel and varies
the brake fluid pressure to prevent each
wheel from locking and sliding. By prevent-
ing wheel lockup, the system helps the
driver maintain steering control and helps to
minimize swerving and spinning on slippery
surfaces.
Using the system
Depress the brake pedal and hold it down.
It is not necessary to pump the brake
pedal.
Doing so may result in increased stopping
distances.
Normal operation
The anti-lock brake system does not oper-
ate at speeds below 3 to 6 MPH (5 to 10
km/h) to completely stop the vehicle. (The
speeds vary according to road conditions.)
When the anti-lock system senses that one
or more wheels are close to locking up, the
actuator (under the hood) rapidly applies
and releases hydraulic pressure (like pump-
ing the brakes very quickly). While the ac-
PRECAUTIONS WHEN
DRIVINGANTI-LOCK BRAKE SYSTEM
(ABS) (If so equipped)
4-16
ZX

tuator is working, you may feel a pulsation in
the brake pedal and hear a noise or vibra-
tion from the actuator under the hood. This
is normal and indicates that the anti-lock
system is working properly. However, the
pulsation may indicate that road conditions
are hazardous and extra care is required
while driving.
Self-test feature
The anti-lock brake system consists of elec-
tronic sensors, electric pumps, and hydrau-
lic solenoids controlled by a computer. The
computer has a built-in diagnostic feature
that tests the system each time you start the
engine and move the vehicle at a low speed
in forward or reverse. When the ``self-test''
occurs, you may hear a ``clunk'' noise and/
or feel a ``pulsation'' in the brake pedal. This
is normal and is not an indication of any
malfunction. If the computer senses any
malfunction, it switches the anti-lock brake
system OFF and turns on the ABS brake
warning light in the dashboard. The brake
system then operates normally, but without
anti-lock assistance.
If the light comes on during the self check,
or while driving, take your vehicle to your
NISSAN dealer for repair at your earliest
convenience.
WARNING
The anti-lock brake system is a sophis-
ticated device, but it cannot prevent
accidents resulting from careless or
dangerous driving techniques. It can
help maintain vehicle control during
braking on slippery surfaces, but re-
member that the stopping distance on
slippery surfaces will be longer than on
normal surfaces, even with the anti-
lock system. Stopping distances may
also be longer on rough, gravel or
snow covered roads, or if you are using
tire chains. Always maintain a safe dis-
tance from the vehicle in front of you.
Ultimately, the responsibility for safety
of self and others rests in the hands of
the driver.
Tire type and condition may also affect
braking effectiveness.
cWhen replacing tires, install the
specified size of tires on all 4 wheels.
c
When installing a spare tire, make sure
it is the proper size and type as speci-
fied on the tire placard. For tire placard
location information, refer to ``Tire
placard'' in the Owner's Manual index.Refer to ``Wheels and tires'' in the ``Do-
it-yourself operations'' section of this
manual.
4-17
ZX

If your vehicle is overheating (indicated by
an extremely high temperature gauge read-
ing), or if you feel a lack of engine power,
detect abnormal noise, etc., take the follow-
ing steps:
WARNING
To avoid the danger of being scalded,
never remove the radiator cap while the
engine is still hot. When the radiator
cap is removed, pressurized hot water
will spurt out, possibly causing serious
injury.
1. Move the vehicle safely off the road,
apply the parking brake and move the
gearshift lever to Neutral (automatic
transmission to P).
Do not stop the engine.
2. Turn off the air conditioning. Open all the
windows, move the heater or air condi-
tioner temperature control to maximum
hot and fan control to high speed.
3. Get out of the vehicle. Look and listen for
steam or coolant escaping from the ra-
diator before opening the hood. Wait until
no steam or coolant can be seen before
proceeding.4. Open the engine hood.
WARNING
If steam or water is coming from the
engine, stand clear to prevent getting
burned.
5. If engine overheating is caused by climb-
ing a long hill on a hot day, run the engine
at a fast idle (approximately 1,500 rpm)
until the temperature gauge indication
returns to normal.
6. Visually check drive belts for damage or
looseness. Also check if the cooling fan
is running. The radiator hoses and radia-
tor should not leak water.
WARNING
cBe careful not to allow your hands,
hair or clothing to come into contact
with, or to get caught in, the running
fan, belts, or fan motor. The fan motor
can start at any time when the cool-
ant temperature is high.
cIf coolant is leaking, the water pump
belt is missing or loose, or the cool-
ing fan does not run, stop the engine.7. After the engine cools down, check the
coolant level in the reservoir tank with the
engine running. Add coolant to the res-
ervoir tank if necessary. Have your ve-
hicle repaired at the nearest NISSAN
dealer.
IF YOUR VEHICLE
OVERHEATS
5-9
ZX

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.
cPark the vehicle on a level surface,
apply the parking brake securely and
block the wheels to prevent the ve-
hicle from moving. Move the gearshift
control lever to Neutral (N).
cBe sure the ignition key is OFF when
performing any parts replacement or
repairs.
cDo not work under the hood while the
engine is hot. Turn the engine off and
wait until it cools down.
cBe sure to turn the ignition key to the
OFF or LOCK position.
When the ignition key is in the ON or
ACC position, the cooling fan may
start to operate suddenly even when
the engine is not running.
cIf you must work with the engine run-
ning, keep your hands, clothing, hair
and tools away from moving fans,
belts and any other moving parts.cIt is advisable to remove ties and any
jewelry, such as rings, watches, etc.,
before working on your vehicle.
cIf you must run the engine in an en-
closed space such as a garage, be
sure there is proper ventilation for
exhaust gases.
cNever get under the vehicle while it is
supported only by a jack. If it is nec-
essary to work under the vehicle, sup-
port it with safety stands.
cKeep smoking materials, flame and
sparks away from fuel and battery.
cNever connect or disconnect either
the battery or any transistorized com-
ponent connector while the ignition is
on.
cOn gasoline engine models with the
Multiport 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.
cFailure to follow these or other com-
mon sense guidelines may lead to
serious injury or vehicle damage.cImproperly disposed motor oil and/or
other vehicle fluids can hurt the envi-
ronment. Always conform to local
regulations for disposal of vehicle
fluid. Avoid contact with used motor
oil.
This ``Do-it-yourself operations'' section
gives instructions regarding only those
items which are relatively easy for an owner
to perform.
You should be aware that incomplete or
improper servicing may result in operating
difficulties or excessive emissions, and
could affect your warranty coverage.If in
doubt about any servicing, have it done
by your NISSAN dealer.
MAINTENANCE
PRECAUTIONS
7-2
ZX