2007 JEEP LIBERTY run flat

•Driver and Front Passenger Seat Belt Pretensioners
•Front Passenger Seat Occupant Classification System
(OCS)
Occupant Classification Module
Passenger Airbag Disabled (PAD) Indicator Light
Interconnecting Wiring
Pressure Sensor, Bladder Assembly, and Belt Tension
Sensor
How The Airbag System Works
•
TheOccupant Restraint Controller (ORC)determines
if a frontal collision is severe enough to require the
airbags to inflate. Based on the level of collision
severity, the front control module determines the
proper rate of inflation. The front airbag inflators are
designed to provide different rates of airbag inflation
from direction provided by the ORC. The ORC maymodify the rate of inflation based on the occupant size
provided by the Occupant Classification Module. The
ORC will not detect roll over, or rear impacts.
The ORC monitors the readiness of the electronic parts
of the system whenever the ignition switch is in the
START or RUN positions. These include all of the
items listed above except the steering wheel and
column, and knee bolsters. If the key is in the OFF
position, in the ACC position, or not in the ignition,
the airbags are not on and will not inflate.
Also, the ORC turns on the AIRBAG warning light
(located in the instrument cluster) and PAD indicator
light (located in the front passenger grab handle) for 6 to
8 seconds for a self-check when the ignition is first turned
on. After the self-check, the AIRBAG warning light will
turn off. The PAD indicator light will function normally
(Refer to “Passenger Airbag Disable (PAD) Indicator
Light” in this section). If the ORC detects a malfunction
54 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

should always use the PAD indicator light as an indica-
tion if the front passenger is properly positioned or not. If
the PAD indicator light comes on when an adult is in the
passenger seat, have the passenger re-position them-
selves in the seat until the light goes out. Remember, if
the PAD indicator light is illuminated the passenger front
airbag will not inflate. For most children properly seated
on the front seat and most properly installed child
restraint systems, the airbag will be disabled and the PAD
indicator light will be on. However, under certain condi-
tions even with the child restraint system has been
installed properly, the PAD indicator light may not be on
even though the air bag is disabled. This can occur if the
child restraint is lighter than the threshold weight neces-
sary to turn the PAD indicator light on. If this happens to
you, you can check to ensure the airbag is disabled by
performing the following simple procedure. Place the
ignition key in the RUN position and apply downward
pressure to the child restraint on the surface that the childwill be sitting on. Slowly count to 10 and watch the PAD
indicator light. The PAD indicator light should turn on.
When you release the pressure, the PAD indicator light
may stay on or may turn off but the airbag is disabled. If
at all possible, place children 12 years and younger in a
back seat.
•TheOccupant Classification Module (OCM)is lo-
cated beneath the front passenger seat. The OCM
classifies the occupant into one of three size categories
based on the input from the Bladder Assembly and a
Belt Tension Sensor. The size categories include empty,
child, and adult. The OCM sends the Occupant Clas-
sification to the ORC to determine if a front passenger
airbag is allowed. If a fault is present, the AIRBAG
warning light is illuminated.
58 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Maintaining Your Airbag System
WARNING!
•Modifications to any part of the airbag system could
cause it to fail when you need it. You could be injured if
the airbag system is not there to protect you. Do not
modify the components or wiring, including adding any
kind of badges or stickers to the steering wheel hub trim
cover or the upper right side of the instrument panel. Do
not modify the front bumper, vehicle body structure, or
add aftermarket side steps or running boards.
•Do not attempt to modify any part of your advanced
airbag system. The airbag may inflate accidentally or
may not function properly if modifications are made.
Take your vehicle to an authorized dealer for any ad-
vanced airbag system service. If your seat including your
trim cover and cushion needs to be serviced in any way,
take the vehicle to your authorized dealer. Only manu-
facturer approved seat accessories may be used. If it is
necessary to modify an advanced airbag system for
persons with disabilities, contact your authorized dealer.
WARNING!
•You need proper knee impact protection in a
collision. Do not mount or locate any aftermarket
equipment on or behind the knee bolsters.
•It is dangerous to try to repair any part of the
airbag system yourself. Be sure to tell anyone who
works on your vehicle that it has an airbag system.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 63
2

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 Anti-Lock Brake System conducts a low speed self-
test at about 12 mph (20 km/h). If for any reason, your
foot is on the brake when the vehicle reaches 12 mph
(20 km/h), this check will be delayed until 25 mph
(40 km/h).
The Anti-Lock Brake System pump motor runs during
the self-test and during an ABS stop to provide the
regulated hydraulic pressure. The motor pump makes a
low humming noise during operation, this is normal.During off-road use, loss of traction can temporarily
defeat the system and cause the warning light to illumi-
nate. Turn the ignition OFF and ON again to restore
Anti-Lock Brake System function.
WARNING!
Pumping of the Anti-Lock Brakes will diminish
their effectiveness and may lead to an accident.
Pumping makes the stopping distance longer. Just
press firmly on your brake pedal when you need to
slow down or stop.
242 STARTING AND OPERATING