sensor NISSAN ALTIMA 1997 U13 / 1.G Owners Manual

Warning labels about the supplemental air
bag system are placed in the vehicle as
shown in the illustration.The supplemental air bag warning light,
displaying AIR BAG in the instrument panel,
monitors the circuits of the supplemental air
bag. The circuits monitored by the supple-
mental air bag light are the diagnosis sensor
unit, supplemental air bag modules and all
related wiring.
When the ignition key is in the ON or START
position, the supplemental air bag warning
light illuminates for about 7 seconds and
then turns off. This means the system is
operational.
APD0513APD0523
WARNING LABELS SUPPLEMENTAL AIR BAG
WARNING LIGHT
2-21
ZX

Operating tips
cWhen the engine coolant temperature
and outside air temperature are low, the
air flow from the foot outlets may not
operate for a maximum of 180 seconds.
This is not a malfunction. After the cool-
ant temperature warms up, the air flows
from the foot outlets normally.
The sensor on the instrument panel helps
maintain a constant temperature; do not put
anything on or around this sensor.
Servicing air conditioner
The air conditioner system in your NISSAN
vehicle is charged with a refrigerant de-
signed with the environment in mind.
This refrigerant does not harm the
earth's ozone layer.
Special charging equipment and lubricant is
required when servicing your NISSAN air
conditioner. Using improper refrigerants or
lubricants will cause severe damage to your
air conditioner system. See ``Air conditioner
system refrigerant and lubricant recommen-
dations'' in the ``Technical and consumer
information'' section of this manual.
Your NISSAN dealer is able to service your
environmentally conscious air conditioner
system.
AHA0501
3-10
ZX

while 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 installed in
some models controls the brakes at each
wheel so the wheels do not lock when
braking abruptly or when braking on slip-
pery surfaces. The system detects the rota-
tion speed at each wheel and varies the
brake fluid pressure to prevent each wheel
from locking and sliding. By preventing
wheel lockup, the system helps the driver
maintain steering control and helps to mini-
mize 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, theactuator (under the hood) rapidly applies
and releases hydraulic pressure (like pump-
ing the brakes very quickly). While the ac-
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 is sophisticated,
with electronic sensors, electric pumps, and
hydraulic solenoids controlled by a com-
puter. The computer has a built-in diagnos-
tic 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 indica-
tion 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.
ANTI-LOCK BRAKE SYSTEM
(ABS) (If so equipped)
4-17
ZX