Anti-Lock Brake System - Jeep Grand Cherokee Owner's Manual

WARNING!
• Never use the PARK position as a substi-
tute for the parking brake. Always apply the
parking brake fully when parked to guard
against vehicle movement and possible
injury or damage.
• Never leave children alone in a vehicle.
Leaving unattended children in a vehicle is
dangerous for a number of reasons. A child
or others could be seriously or fatally in-
jured.
• Do not leave the key fob in the ignition
switch. A child could operate power win-
dows, other controls, or move the vehicle.
• Be sure the parking brake is fully disen-
gaged before driving; failure to do so can
lead to brake failure and an accident.
• Always fully apply the parking brake when
leaving your vehicle, or it may roll and
cause damage or injury. Also be certain to
leave the transmission in PARK. Failure to
do so may allow the vehicle to roll and
cause damage or injury.
CAUTION!
If the "Brake Warning Light" remains on with
the parking brake released, a brake system
malfunction is indicated. Have the brake sys-
tem serviced by an authorized dealer imme-
diately.

ANTI-LOCK BRAKE SYSTEM

The Anti-Lock Brake System (ABS) is designed
to aid the driver in maintaining vehicle control
under adverse braking conditions. The system
operates with a separate computer to modulate
hydraulic pressure, to prevent wheel lock-up
and help avoid skidding on slippery surfaces.
All vehicle wheels and tires must be the same
size and type, and tires must be properly
inflated, to produce accurate signals for the
computer.
WARNING!
Significant over or under-inflation of tires or
mixing sizes of tires or wheels on the vehicle
can lead to loss of braking effectiveness.
The ABS conducts a low-speed self-test at
about 12 mph (20 km/h). If you have your foot
lightly on the brake while this test is occurring,
you may feel slight pedal movement. The
movement can be more apparent on ice and
snow. This is normal.
The ABS pump motor runs during the self-test
at 12 mph (20 km/h) and during an ABS stop.
The pump motor makes a low humming noise
during operation, which is normal.
WARNING!
• Pumping of the Anti-Lock Brakes will dimin-
ish their effectiveness and may lead to an
accident. Pumping makes the stopping dis-
tance longer. Just press firmly on your
brake pedal when you need to slow down
or stop.
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