1997 NISSAN SENTRA heating

Air recirculation button
(if so equipped)
NOTE:
The air recirculation feature is available
only on those vehicles equipped with air
conditioning.
OFF position (indicator light OFF):
Outside air is drawn into the passenger
compartment and distributed through the
selected outlets.
Use the OFF position for normal heater or
air conditioner operation.
ON position (indicator light ON):
Interior air is recirculated inside the vehicle.
Depress the air recirculation button to acti-
vate the recirculation function when driving
on a dusty road or to avoid traffic fumes.
The air recirculation function is also used to
improve A/C performance during extremely
hot or humid conditions.
Air conditioner button
(if so equipped)
Start the engine, move the fan control dial to
the desired (1 to 4) position, and push the
air conditioner button to turn on the air
conditioner. The indicator light comes on
when the air conditioner is on. To turn off the
air conditioner, push the button again.
The air conditioner cooling function op-
erates only when the engine is running.
HEATER OPERATION
Heating
This mode is used to direct hot air mainly
from the floor outlets. A small amount of air
also flows from the defrost vents.
1. Push the air recirculation button (if so
equipped) to the OFF position for normal
heating.
2. Move the air control dial to the
po-
sition.
3. Move the fan control dial to the desired
position.
4. Move the temperature control dial to thedesired position between the middle and
the hot position.
Ventilation
This mode directs outside air from the side
and center vents.
1. Push the air recirculation button (if so
equipped) to the OFF position.
2. Move the air control dial to the
po-
sition.
3. Move the fan control dial to the desired
position.
4. Move the temperature control dial to the
desired position.
Defrosting or defogging
This mode is used to defrost/defog the
windows.
1. Push the air recirculation button (if so
equipped) to the OFF position.
2. Move the air control dial to the
po-
sition.
3. Move the fan control dial to the desired
position.
4. Move the temperature control dial to the
3-4
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desired position between the middle and
the hot position.
cIf it is difficult to defog the windshield
glass, turn the air conditioner on (if so
equipped). This helps dehumidify the air.
Outside air is drawn into the passenger
compartment to improve the defogging per-
formance.
Bi-level heating
This mode directs cooler air from the side
and center vents and warmer air from the
floor outlets. When the temperature control
dial is moved to the full hot or full cool
position, the air between the vents and the
floor outlets is the same temperature.
1. Push the air recirculation button (if so
equipped) to the OFF position.
2. Move the air control dial to the
po-
sition.
3. Move the fan control dial to the desired
position.
4. Move the temperature control dial to the
the desired position.
Heating and defogging
This mode heats the interior and defogs the
windshield.
1. Push the air recirculation button (if so
equipped) to the OFF position.
2. Move the air control dial to the
po-
sition.
3. Move the fan control dial to the desired
position.
4. Move the temperature control dial to the
desired position between the middle and
the hot position.
Operating tips
cClear snow and ice from the wiper
blades and air inlet in front of the
windshield. This improves heater op-
eration.
AIR CONDITIONER OPERATION
(if so equipped)
Start the engine, move the fan control dial to
the desired (1 to 4) position, and push in the
air conditioner button to activate the air
conditioner. When the air conditioner is on,
cooling and dehumidifying functions areadded to the heater operation.
The air conditioner cooling function op-
erates only when the engine is running.
Cooling
This mode is used to cool and dehumidify.
1. Push the air recirculation button to the
OFF position.
2. Move the air control dial to the
po-
sition.
3. Move the fan control dial to the desired
position.
4. Push on the air conditioner button. The
indicator light comes on.
5. Move the temperature control dial to the
desired position.
cFor quick cooling when the outside tem-
perature is high, push the air recirculation
button to the ON position. Be sure to
return the air recirculation button to the
OFF position for normal cooling.
Dehumidified heating
This mode is used to heat and dehumidify
the air.
3-5
ZX

1. Push the air recirculation button to the
OFF position.
2. Move the air control dial to the
po-
sition.
3. Move the fan control dial to the desired
position.
4. Push on the air conditioner button. The
indicator light comes on.
5. Move the temperature control dial to the
desired position.
Dehumidified defogging
This mode is used to defog the windows
and dehumidify.
1. Push the air recirculation button to the
OFF position.
2. Move the air control dial to the
po-
sition.
3. Move the fan control dial to the desired
position.
4. Push on the air conditioner button. The
indicator light comes on.
5. Move the temperature control dial to the
desired position.
Operating tips
cKeep windows and sunroof closed while
the air conditioner is in operation.
cAfter parking in the sun, drive for two or
three minutes with the windows open to
vent hot air from the passenger compart-
ment. Then, close the windows. This
allows the air conditioner to cool the
interior more quickly.
cThe air conditioning system should be
operated for about ten minutes at
least once a month. This helps pre-
vent damage to the system due to lack
of lubrication.
cIf the engine coolant temperature
gauge indicates engine coolant tem-
perature over the normal range, turn
the air conditioner off. See ``If your
vehicle overheats'' in the ``In case of
emergency'' section for additional in-
formation.
AIR FLOW CHARTS
The following charts show the button and
dial positions forMAXIMUM AND QUICK
heating, cooling or defrosting.The air recir-
culation switch should always be in the
OFF position for heating and defrosting.
3-6
ZX

The brake system has two separate hy-
draulic circuits. If one circuit develops a
problem, you will still have braking at
two wheels.
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 pressure on
the brake pedal will be required to stop the
vehicle and the stopping distance will be
longer.
Wet 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 brake pedal
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.
Using the brakes
Avoid resting your foot on the brake pedalwhile driving. This overheats the brakes,
increases wear on the brake linings and
pads, and reduces gas mileage.
To 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.
WARNING
While driving on a slippery surface, be
careful when braking, accelerating or
downshifting. Abrupt braking or accel-
erating could cause the wheels to skid
and result in an accident.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.
WARNING
Do not pump the brake pedal. Doing so
may result in increased stopping dis-
tances.
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
BRAKE SYSTEM ANTI-LOCK BRAKE SYSTEM
(ABS) (if so equipped)
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
cDo not continue to drive if your ve-
hicle overheats. Doing so could
cause a vehicle fire.
cTo 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.
cDo not open the hood if steam is
coming out.
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 conditioner. Open all the
windows, move the heater or air condi-
tioner temperature control to maximum
hot and fan control to high speed.3. 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.
4. 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.
5. Open the engine hood.
WARNING
If steam or water is coming from the
engine, stand clear to prevent getting
burned.
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. If coolant is
leaking, the water pump belt is missing or
loose, or the cooling fan does not run,
stop the engine.
WARNING
Be careful not to allow your hands, hair,
jewelry 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 coolant
temperature is high.
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
5-10
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If the cooling system frequently requires
coolant, have it checked by your NISSAN
dealer.
CHANGING ENGINE COOLANT
cMajor cooling system repairs should be
performed by your NISSAN dealer. The
service procedures can be found in the
appropriate NISSAN Service Manual.cImproper servicing can result in reduced
heater performance and engine over-
heating.
WARNING
cTo avoid the danger of being
scalded, never change the coolant
when the engine is hot.
cNever remove the radiator cap when
the engine is hot. Serious burns
could be caused by high pressure
fluid escaping from the radiator.
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7-6
ZX

1. Move the heater or air conditioner tem-
perature control dial to the maximum hot
position.
2. Open the radiator drain plug. Open the
drain plug on the engine block.3. Open the radiator cap to drain the cool-
ant.
4. Flush the cooling system by running
fresh water through the radiator.
5. Close the drain plugs on the radiator and
the engine block securely.
6. See the ``Technical and consumer infor-
mation'' section for cooling system ca-
pacity. Fill the radiator slowly with the
proper mixture of coolant and water. Fill
the reservoir tank up to the MAX level.
7. Open and close the air release plug(s) to
release air. Then fill the radiator again
and install the radiator cap.
8. 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.
ADI0632
ADI0615
7-7
ZX

of at least 87 AKI (Anti-Knock Index). How-
ever, you may use unleaded gasoline with
an octane rating as low as 85 AKI (Anti-
Knock Index) in high altitude areas (over
4,000 ft [1,219 m]) such as: Colorado, Mon-
tana, New Mexico, Utah, Wyoming, north-
eastern Nevada, southern Idaho, western
South Dakota, western Nebraska, and that
part of Texas which is directly south of New
Mexico.
Using unleaded gasoline with an octane
rating lower than stated above can cause
persistent, heavy ``spark knock.'' (``Spark
knock'' is a metallic rapping noise.) If
severe, this can lead to engine damage. If
you detect a persistent heavy spark
knock even when using gasoline of the
stated octane rating, or if you hear steady
spark knock while holding a steady
speed on level roads, have your dealer
correct the condition. Failure to correct
the condition is misuse of the vehicle, for
which NISSAN is not responsible.
Incorrect ignition timing results in knocking,
after-run and/or overheating. This in turn
may cause excessive fuel consumption or
damage to the engine. If any of the above
symptoms are encountered, have your ve-hicle checked at a NISSAN dealer or other
competent service facility.
However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is
not a cause for concern, because you
get the greatest fuel benefit when there
is light spark knock for a short time
under heavy engine load.
9-4
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