2007 DODGE GRAND CARAVAN wheel size

proper rate of inflation. The front airbag inflators are
designed to provide different rates of airbag inflation.
• The ORC may modify the rate of inflation based on the
occupant size provided by the Occupant Classification
Module.
• The ORC will not detect side, 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, instrument panel and passenger knee bol-
sters. 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 warn-
ing light and PAD indicator light in the
center of 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 to “Passenger Airbag
Disable (PAD) Indicator Light” in this section). If the
ORC detects a malfunction in any part of the system, it
turns on the AIRBAG warning light either momen-
tarily or continuously. A single chime will sound if the
light comes on again after initial start up.
WARNING!Ignoring the AIRBAG warning light in your instru-
ment 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. THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 63
2

• The Driver and Passenger Airbag/Inflator Units are
located in the center of the steering wheel and the right
side of the instrument panel. When the ORC and
impact sensors detects a collision requiring the air-
bags, 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 occupant size. The steering
wheel hub trim cover and the upper right side of the
instrument panel separate and fold out of the way as
the airbags inflate to their full size. The airbags fully
inflate in about 50–70 milliseconds. This is about half
of the time it takes to blink your eyes. The airbags then
quickly deflate while helping to restrain the driver and
front passenger.
The driver’s and passenger’s front airbag gas is vented
through the airbag material towards the instrument
panel. In this way the airbags do not interfere with
your control of the vehicle. • The Side Impact SRS Side Curtain Bags are designed
to activate only in certain side collisions. When the
ORC and the side impact sensors (with side impact
option) detects a collision requiring the window bags
to inflate, it signals the inflators on the crash side of the
vehicle. A quantity of nontoxic gas is generated to
inflate the window bag. The inflating window bag
pushes the outside edge of the headliner out of the
way and covers the window. The airbag inflates in
about 30 milliseconds (about one quarter of the time it
takes to blink your eyes) with enough force to injure
you if you are not belted and seated properly, or if
items are positioned in the area where the window bag
inflates. This especially applies to children. The win-
dow bag is only about 3 1
2
inches (9 cm) thick when it
is inflated.64 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

when a system fault is detected. The flash cycle will
repeat every ten minutes or until the fault condition is
removed and reset.
CAUTION!The Tire Pressure Monitoring System (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 ve-
hicle. Undesirable system operation or sensor dam-
age 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. 3. Low Fuel Light
When the fuel level reaches approximately 3.0
gallons (11.0 liters) this light will turn on and
remain on until fuel is added.
4. Turn Signal Indicators
The arrow will flash with the exterior turn signal
when the turn signal lever is operated.
If the vehicle electronics sense that the vehicle has
traveled about one mile with the turn signals on, a chime
will sound to alert you to turn the signals off. If either
indicator flashes at a rapid rate, check for a defective
outside light bulb.
5. Liftgate Ajar
This light turns on if the liftgate is not com-
pletely closed.212 UNDERSTANDING YOUR INSTRUMENT PANEL

 Replacement Parts .....................363
 Maintenance .........................363

Vehicle Loading ........................363
 Vehicle Certification Label ...............364
 Gross Vehicle Weight Rating (GVWR) .......364
 Gross Axle Weight Rating (GAWR) .........364
 Tire Size ............................365
 Rim Size ...........................365
 Inflation Pressure .....................365
 Curb Weight .........................365
 Overloading .........................365
 Loading ............................366
Trailer Towing .........................367
 Common Towing Definitions .............368
 Trailer Hitch Classification ...............371
 Trailer Towing Weights (Maximum Trailer Weight
Ratings) ............................372
 Trailer And Tongue Weight ..............374
 Towing Requirements ..................376
 Towing Tips .........................381

Recreational Towing (Behind Motorhome, Etc.) . . 382
 Towing This Vehicle Behind Another Vehicle
(Flat Towing With All Four Wheels On The
Ground) ............................382310 STARTING AND OPERATING

Improper alignment will not cause vehicle vibration.
Vibration may be a result of tire and wheel out-of-
balance. Proper balancing will reduce vibration and
avoid tire cupping and spotty wear.
TIRE CHAINS
Use only compact chains, or other traction aids that meet
SAE type “Class S” specifications. Chains must be the
proper size for the vehicle, as recommended by the chain
manufacturer.
NOTE: Do not use tire chains on a compact spare tire. CAUTION! To avoid damage to your vehicle or tires, observe the
following precautions:

Service Tire System Soon
The Tire Pressure Monitoring Telltale Lamp will flash on
and off for 60 seconds in the instrument cluster, and an
audible chime will be activated when one or more of the
four active road tire pressures are low.
In addition the Electronic Vehicle Information Center
(EVIC) will display a “SERVICE TIRE SYSTEM SOON”
text message. The flash cycle will repeat every ten
minutes, without an audible chime, until the condition no
longer exists. The flash cycle sequence will repeat and an
audible chime will sound once every ignition cycle for
each condition that it detects.
NOTE: If a temporary spare tire is in use and none of
the remaining 3 active road tire pressures are low, a
“SERVICE TIRE SYSTEM SOON textual message will
appear in the EVIC after 10 minutes of driving, CAUTION!The Tire Pressure Monitoring System (TPMS) has
been optimized for the original equipment tires and
wheels. TPMS pressures have been established for
the tire size equipped on your vehicle. Undesirable
system operation or sensor damage may result when
using replacement equipment that is not of the same
size, type, and/or style. After-market wheels can
cause sensor damage. Do not use tire sealant from a
can, or balance beads if your vehicle is equipped
with a Tire Pressure Monitor System, as damage to
the sensors may result. STARTING AND OPERATING 351
5

Tire Size
The tire size on the Label represents the actual tire size on
your vehicle. Replacement tires must be equal to the load
capacity of this tire size.
Rim Size
This is the rim size that is appropriate for the tire size
listed.
Inflation Pressure
This is the cold tire inflation pressure for your vehicle for
all loading conditions up to full GAWR.
Curb Weight
The curb weight of a vehicle is defined as the total weight
of the vehicle with all fluids, including vehicle fuel, at full
capacity conditions, and with no occupants or cargo
loaded into the vehicle. The front and rear curb weight
values are determined by weighing your vehicle on a
commercial scale before any occupants or cargo are
added. Overloading
The load carrying components (axle, springs, tires,
wheels, etc.) of your vehicle will provide satisfactory
service as long as you do not exceed the GVWR and front
and rear GAWR.
The best way to figure out the total weight of your
vehicle is to weigh it when it is fully loaded and ready for
operation. Weigh it on a commercial scale to insure that it
is not over the GVWR.
Figure out the weight on the front and rear of the vehicle
separately. It is important that you distribute the load
evenly over the front and rear axles.
Overloading can cause potential safety hazards and
shorten useful service life. Heavier axles or suspension
components do not necessarily increase the vehicle’s
GVWR. STARTING AND OPERATING 365
5

CAUTION!For vehicles equipped with Stow ’n Go seating, the
Winch Mechanism is designed specifically to stow a
COMPACT Spare Tire ONLY. Do not attempt to use
the Winch to stow the Full Size ’Flat’ Tire, or any
other Full Size Tire. Vehicle damage may result.
Jacking Instructions — Non Stow ’n Go Seating
Preparations For Jacking
Park the vehicle on a firm level surface, avoid ice or
slippery areas, set the parking brake and place the gear
selector in PARK. Turn OFF the ignition. WARNING!Do not attempt to change a tire on the side of the
vehicle close to moving traffic. Pull far enough off
the road to avoid the danger of being hit when
operating the jack or changing the wheel.
• Turn on the Hazard Warning Flasher.
• Block both the front and rear
of the wheel diagonally oppo-
site the jacking position. For
example, if changing the right
front tire, block the left rear
wheel.
• Passengers should not remain in the vehicle when the
vehicle is being jacked. WHAT TO DO IN EMERGENCIES 399
6