2007 JEEP COMPASS sensor

WARNING!
•Relying on the airbags alone could lead to more
severe injuries in a collision. The airbags work
with your seat belt to restrain you properly. In
some collisions the airbags won’t deploy at all.
Always wear your seat belts even though you
have airbags.
•Being too close to the steering wheel or instru-
ment panel during front airbag deployment could
cause serious injury. Airbags need room to inflate.
Sit back, comfortably extending your arms to
reach the steering wheel or instrument panel.
•If the vehicle has side airbags, they also need
room to inflate. Do not lean against the door. Sit
upright in the center of the seat.
The front airbag system consists of the following:
•Occupant Restraint Controller
•Side Remote Acceleration Sensors (If equipped)
•Airbag Warning Light
•Driver Airbag
•Passenger Airbag
•Front Seat Mounted Side Airbags (If equipped)
•Side Curtain Airbags
•Steering Wheel and Column
•Instrument Panel
•Interconnecting Wiring
•Knee Impact Bolsters
•Front Acceleration Sensors
52 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

•Driver and Front Passenger Seat Belt Pretensioners
•Occupant Classification System (OCS) for the Front
Passenger Seat
Occupant Classification Module
Passenger Airbag Disable (PAD) Indicator Light
Weight Sensors
How The Airbag System Works
•
TheOccupant Restraint Controller (ORC)determines
if a frontal collision is severe enough to require the
airbags to inflate. The front airbag inflators are de-
signed to provide different rates of airbag inflation
from direction provided by the ORC. The ORC may
also modify the rate of inflation based on the occupant
size provided by the Occupant Classification Module.
The ORC will not detect roll over.The ORC also 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.
During a moderate-to-severe rear impact the ORC may
deploy the seat belt pretensioners alone.
Also, the ORC turns on the AIRBAG warning
light and PAD indicator light in the instrument
panel 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 toPassen-
ger Airbag Disable (PAD) Indicator Lightin this section).
If the ORC detects a malfunction in any part of the
system, it turns on the AIRBAG warning light either
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 53
2

momentarily or continuously. A single chime will sound
if the light comes on again after initial start up.
WARNING!
Ignoring the AIRBAG light in your instrument panel
could mean you won’t have the airbags to protect
you in a collision. If the light does not come on, stays
on after you start the vehicle, or if it comes on as you
drive, have the airbag system checked right away.
•TheOccupant Classification System (OCS)is part of
a Federally regulated safety system required for this
vehicle. It is designed to turn off the front passenger
airbag for occupants that weigh less than a very small
adult.
NOTE:Children 12 years and under should always ride
buckled up in a rear seat in an appropriate child restraint.
•The OCS classifies an occupant using weight sensors
mounted in the base of the front passenger seat. Any
weight on the seat will be sensed by the system.
Objects hanging on the seat or other passengers push-
ing down on the seat will also be sensed. The weight of
an adult will cause the system to turn the airbag on. In
this case, the OCS has classified the occupant of the
seat as an adult. An adult occupant needs to sit in a
normal position (with their feet on or near the floor) in
order to be properly classified. Reclining the seat back
too far may change how an occupant is classified by
the OCS.
•ThePassenger Airbag Disabled (PAD) Indicator
Light(an amber light located in the center of the
instrument panel) tells the driver and front passenger
when the front passenger airbag is turned off. The
PAD Indicator lamp illuminates the wordsPASS AIR
BAG OFFto show that the front passenger airbag will
not inflate during a collision requiring airbags. When
54 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Front Passenger
Seat OccupantPassenger Air-
bag Disable
(PAD) Indica-
tor LightAirbag Status
Adult OFF ON
Child ON OFF
Grocery Bags,
Heavy Briefcases
and Other Rela-
tively Light ObjectsON OFF
Empty or Very
Small ObjectsOFF* OFF
* Since the system senses weight, some small objects
will turn the PAD Indicator Light on.
Drivers and adult passengers should verify that the PAD
Indicator Light is not illuminated when an adult is riding
in the front passenger seat. If an adult occupant’s weight
is transferred to another part of the vehicle (like the door
or instrument panel), the weight sensors in the seat maynot properly classify the occupant. Objects lodged under
the seat or between the seat and the center console can
prevent the occupant’s weight from being measured
properly and may result in the occupant being improp-
erly classified. Ensure that the front passenger seat back
does not touch anything placed on the second row of
seats because this can also affect occupant classification.
Also, if you fold down the seats in the second row check
to be sure they don’t touch the front passenger seat.
If the front passenger seat is damaged in any way, it
should only be serviced by an authorized dealer. If the
seat is removed (or even if the seat attachment bolts are
loosened or tightened in any way), take the vehicle to an
authorized dealer.
If there is a fault present in the OCS, the Airbag Warning
Light (a red light located in the center of the instrument
cluster directly in front of the driver) will be turned on.
This indicates that you should take the vehicle to an
56 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

authorized dealer. The Airbag Warning Light is turned on
whenever there is fault that can affect the operation of the
airbag system. If there is a fault present in the OCS, both
the PAD Indicator Light and the Airbag Warning Light
are illuminated to show that the passenger airbag is
turned off until the fault is cleared. If an object is lodged
under the seat and interferes with operation of the weight
sensors, a fault will occur which turns on both the PAD
Indicator Light and the Airbag Warning Light. Once the
lodged object is removed, the fault will be automatically
cleared after a short period of time.
•TheDriver and Passenger Airbag/Inflator Unitsare
located in the center of the steering wheel and the right
side of the instrument panel. When the ORC detects a
collision requiring the airbags, it signals the inflator
units. A large quantity of nontoxic gas is generated to
inflate the front airbags. Different airbag inflation rates
may be possible based on collision severity and occu-
pant size. The steering wheel hub trim cover and theupper right side of the instrument panel separate and
fold out of the way as the bags inflate to their full size.
The bags fully inflate in about 50 - 70 milliseconds.
This is about half of the time it takes to blink your eyes.
The bags then quickly deflate while helping to restrain
the driver and front passenger. The driver’s front
airbag gas is vented through vent holes in the sides of
the airbag. The passenger’s front airbag gas is vented
through vent holes in the sides of the airbag. In this
way the airbags do not interfere with your control of
the vehicle.•TheOccupant Classification Module (OCM)is lo-
cated beneath the front passenger seat. The OCM
classifies the occupant into categories based on the
measurements made by the seat weight sensors. The
OCM communicates with the Occupant Restraint Con-
troller (ORC). The ORC uses the occupant category to
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 57
2

determine whether the front passenger airbag should
be turned off. It also determines the rate of airbag
inflation during a collision.
•Your vehicle has fourWeight Sensorslocated between
the seat and the floor pan. The weight sensors measure
applied weight and transfers that information to the
OCM.
•TheSide Impact (SRS) Side Curtain Airbagsare
designed to activate only in certain side collisions.
The ORC module determines if a side collision is
severe enough to require the side airbags to inflate.
The side airbag control module will not detect roll
over, front or rear collisions.
The ORC Module monitors the readiness of the electronic
parts of the system whenever the ignition switch is in the
START or ON positions. These include all of the items
previously mentioned.In moderate to severe side collisions, the side airbag
inflator on the crash side of the vehicle is triggered,
releasing a quantity of nontoxic gas. The side curtain
airbag moves at a very high speed and with such a high
force, that it could injure you if you are not seated
properly, or if items are positioned in the area where the
side curtain airbag inflates. This especially applies to
children.
NOTE:If your vehicle is equipped with left and right
side curtain air bags, do not install a clothing bar
mounted to the coat hooks (or similarly mounted). A
clothing bar will impede the proper performance of the
bags.
•TheKnee Impact Bolstershelp protect the knees, and
position everyone for the best interaction with the
front airbag.
58 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

ESP (Electronic Stability Program)
This system enhances directional control and stability of
the vehicle under various driving conditions. ESP cor-
rects for over/under steering of the vehicle by applying
the brake of the appropriate wheel to assist in counter-
acting the over/under steer condition. Engine power
may also be reduced to help the vehicle maintain the
desired path. ESP uses sensors in the vehicle to determine
the vehicle path intended by the driver and compares it
to the actual path of the vehicle. When the actual path
does not match the intended path, ESP applies the brake
of the appropriate wheel to assist in counteracting the
oversteer or understeer condition
•Oversteer - when the vehicle is turning more than
appropriate for the steering wheel position.
•Understeer - when the vehicle is turning less than
appropriate for the steering wheel position.
ESP/TCS Indicator Light
The “ESP/TCS Indicator Light” located in the instrument
cluster, starts to flash as soon as the tires lose traction and
the ESP system becomes active. The “ESP/TCS Indicator
Light” also flashes when TCS is active. If the “ESP/TCS
Indicator Light” begins to flash during acceleration, ease
up on the accelerator and apply as little throttle as
possible. Be sure to adapt your speed and driving to the
prevailing road conditions.
142 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures and
warning have been established for the tire size
equipped on your vehicle. Undesirable system op-
eration or sensor damage may result when using
replacement equipment that is not of the same size,
type, and/or style. Aftermarket wheels can cause
sensor damage. Do not use tire sealant from a can, or
balance beads if your vehicle is equipped with a
TPMS, as damage to the sensors may result.
23. Four-Wheel-Drive
This light indicates the vehicle is in 4WD.
24. Odometer/Trip Odometer
A vacuum fluorescent display indicates the total distance
the vehicle has been driven. Also, the cluster will display,replacing the odometer/trip odometer, vehicle warning
messages such as: door/gate ajar and loose gas cap.
Loose gas cap will be displayed from the Odometer/Trip
Odometer on all models.
NOTE:If vehicle is equipped with the optional Elec-
tronic Vehicle Information Center (EVIC) in the instru-
ment cluster, all warnings including “door”, and “gATE”
will only be displayed in the EVIC display. For additional
information, refer to “Electronic Vehicle Information Cen-
ter — If Equipped” in Section 3.
U.S. federal regulations require that upon transfer of
vehicle ownership, the seller certify to the purchaser the
correct mileage that the vehicle has been driven. There-
fore, if the odometer reading is changed during repair or
replacement, be sure to keep a record of the reading
before and after the service so that the correct mileage can
be determined.
UNDERSTANDING YOUR INSTRUMENT PANEL 173
4