NISSAN vehicle - Manual (Page 270)

This procedure is described in the vehicle service
manual and can be performed by a NISSAN
dealer.
ANTI-LOCK BRAKING SYSTEM
(ABS)
The anti-lock braking system controls the brakes
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 main-
tain 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
distances.
Normal operation
The anti-lock braking system does not operate at
speeds below 3 - 6 MPH (5 - 10 km/h). (The
speeds vary according to road conditions.)
When driving, the anti-lock braking system con-
trols the wheels so they will not lock when brak-
ing abruptly or when braking on a slippery road.
Thus, steering control is increased and swerving
of the vehicle is decreased during emergency
braking. The system detects the wheel rotation
rate and electronically controls the pressure ap-
plied to each brake. Slight vibration on the brake
pedal accompanied by noise usually occurs while
the ABS system is operating. Such vibration and
noise encountered during abrupt braking is not a
problem, but indicates that the system is func-
tioning properly. However, the pulsation may in-
dicate that road conditions are hazardous and
extra care is required while driving.
Self-test feature
The anti-lock braking system consists of elec-
tronic sensors and hydraulic solenoids controlled
by a computer. The computer has a built-in diag-
nostic 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 com-
puter senses any malfunction, it switches the
anti-lock braking system off and turns on the ABS
brake warning light on the instrument panel. The
braking system then operates normally, but with-
out anti-lock assistance.
If the light comes on during the self-test or while
driving, take the vehicle to a NISSAN dealer for
repair.
WARNING
● The anti-lock braking system is a so-
phisticated 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
braking system. Stopping distances
may also be longer on rough, gravel or
snow covered roads, or if you are using
tire chains. Tire type and condition may
also affect braking effectiveness. Al-
ways maintain a safe distance from the
vehicle in front of you. Ultimately, the
responsibility for safety of self and oth-
ers rests in the hands of the driver.
● Tire type and condition of tires may also
affect braking effectiveness.
● When replacing tires, install the speci-
fied size of tires on all four wheels.
5-20 Starting and driving
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REVIEW COPY— 2007 Quest (van)
Owners Manual—USA_English (nna)
02/27/06—debbie
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