brake sensor NISSAN QUEST 1999 V41 / 2.G Owners Manual

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 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 system senses one
or more wheels are close to locking up, the
actuator (under the hood) rapidly applies and
releases hydraulic pressure (like pumping the
brakes very quickly). While the actuator isworking, 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-lock system is working prop-
erly. 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 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 of tires may
also affect braking effectiveness.
cWhen replacing tires, install the
specified size of tires on all four
wheels.
ANTI-LOCK BRAKE SYSTEM
(ABS) (if so equipped)
Starting and driving5-15
ZX