brake sensor NISSAN QUEST 2002 V41 / 2.G Owners Manual

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 preventing wheel
lockup, the system helps the driver maintain
steering control and helps to minimize swerv-
ing 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 operate
at speeds below 3 to 6 MPH (5 to 10 km/h).
(The speeds vary according to road condi-
tions.) When the anti-lock brake system
senses one or more wheels are close to
locking up, the actuator (under the hood)
rapidly applies and releases hydraulic pres-
sure (like pumping the brakes very quickly).
While the actuator is working, you may feel a
pulsation in the brake pedal and hear a noise
or vibration from the actuator under the hood.
This is normal and indicates the anti-lockbrake system is working properly. However,
the pulsation may indicate 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 hydraulic
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 ve-
hicle 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 com-
puter senses any malfunction, it switches
the anti-lock brake system OFF and turns
on the ABS brake warning light in the dash-
board. The brake system then operates
normally, but without anti-lock assistance.
If the light comes on during the self-test, or
while driving, take the vehicle to an authorized
NISSAN dealer for repair.
WARNING
The anti-lock brake system is a
sophisticated device, but it cannot pre-
vent 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 brake 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 of tires may
also affect braking effectiveness.
cWhen replacing tires, install the
specified size of tires on all four
wheels.
Starting and driving
5-15
ZX