182STARTING AND OPERATING
TRAILER HITCH CLASSIFICATION
The following chart provides the industry standard for the maximum trailer weight a given trailer hitch class can tow and should be used to assist you in selecting the correct trailer hitch
for your intended towing condition.
TRAILER TOWING WEIGHTS (MAXIMUM TRAILER WEIGHT RATINGS)
Trailer Hitch Classification Definitions
Class Max. Trailer Hitch Industry Standards
Class I - Light Duty 2,000 lb (907 kg)
Class II - Medium Duty 3,500 lb (1,587 kg)
Class III - Heavy Duty 6,000 lb (2,722 kg)
Class IV - Extra Heavy Duty 10,000 lb (4,535 kg)
Refer to the “Trailer Towing Weights (Maximum Trailer Weight Ratings)” chart for the Maximum Gross Trailer Weight (GTW) towable for your given drivetrain.
All trailer hitches should be professionally installed on your vehicle.
Model Engine Wheel Base (in) Axle Ratio GCWR Frontal Area Max GTW Max TW
Wagoneer 4x2 3.0L SO 1303.5512,300 lb
(5,579 kg) 40 sq ft (3.72 sq m) 5,990 lb
(2,717 kg) 599 lb (272 kg)
Wagoneer 4x4 3.0L SO 1303.5512,300 lb
(5,579 kg) 40 sq ft (3.72 sq m) 5,750 lb
(2,608 kg) 575 lb (261 kg)
Wagoneer 4x2 3.0L SO 1303.9216,500 lb
(7,484 kg) 60 sq ft (5.57 sq m) 10,000 lb
(4,536 kg) 1,000 lb (454 kg)
Wagoneer 4x4 (Max Tow) 3.0L SO
1303.9216,500 lb
(7,484 kg) 55 sq ft (5.11 sq m) 10,000 lb
(4,536 kg) 1,000 lb (454 kg)
23_WS_OM_EN_USC_t.book Page 182
STARTING AND OPERATING185
(Continued)
TRAILER AND TONGUE WEIGHT
Never exceed the maximum tongue weight stamped on
your bumper or trailer hitch.
Weight Distribution
Consider the following items when computing the weight
on the rear axle of the vehicle:
The tongue weight of the trailer.
The weight of any other type of cargo or equipment put
in or on your vehicle.
The weight of the driver and all passengers.
NOTE:Remember that everything put into or on the trailer adds
to the load on your vehicle. Also, additional
factory-installed options or dealer-installed options must
be considered as part of the total load on your vehicle.
Refer to the Tire And Loading Information Placard for the
maximum combined weight of occupants and cargo for
your vehicle.
TOWING REQUIREMENTS
To promote proper break-in of the new vehicle drivetrain
components, the following guidelines are recommended. Perform the maintenance listed in the Scheduled
Servicing
Úpage 309. When towing a trailer, never
exceed the GAWR or GCWR ratings.
WARNING!
Always load a trailer with 60% of the weight in the front
of the trailer. This places 10% of the GTW on the tow
hitch of your vehicle. Loads balanced over the wheels or
heavier in the rear can cause the trailer to sway
severely side to side which will cause loss of control of
the vehicle and trailer. Failure to load trailers heavier in
front is the cause of many trailer collisions.CAUTION!
Do not tow a trailer at all during the first 500 miles
(805 km) the new vehicle is driven. The engine, axle
or other parts could be damaged.
Then, during the first 500 miles (805 km) that a
trailer is towed, do not drive over 50 mph (80 km/h)
and do not make starts at full throttle. This helps the
engine and other parts of the vehicle wear in at the
heavier loads.
WARNING!
Make certain that the load is secured in the trailer
and will not shift during travel. When trailering cargo
that is not fully secured, dynamic load shifts can
occur that may be difficult for the driver to control.
You could lose control of your vehicle and have a
collision.
When hauling cargo or towing a trailer, do not over -
load your vehicle or trailer. Overloading can cause a
loss of control, poor performance or damage to
brakes, axle, engine, transmission, steering, suspen -
sion, chassis structure or tires.
Safety chains must always be used between your
vehicle and trailer. Always connect the chains to the
hook retainers of the vehicle hitch. Cross the chains
under the trailer tongue and allow enough slack for
turning corners.
Vehicles with trailers should not be parked on a
grade. When parking, apply the parking brake on the
tow vehicle. Put the tow vehicle transmission in PARK
(P). For four-wheel drive vehicles, make sure the
transfer case is not in NEUTRAL (N). Always, block or
"chock" the trailer wheels.
GCWR must not be exceeded.
4
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186STARTING AND OPERATING
Towing Requirements — Tires
Do not attempt to tow a trailer while using a compact
spare tire.
Do not drive more than 50 mph (80 km/h) when towing
while using a full-size spare tire.
Proper tire inflation pressures are essential to the safe
and satisfactory operation of your vehicle.
Check the trailer tires for proper tire inflation pressures
before trailer usage.
Check for signs of tire wear or visible tire damage
before towing a trailer.
Replacing tires with a higher load carrying capacity will
not increase the vehicle's GVWR and GAWR limits.
For further information
Úpage 349.
Towing Requirements — Trailer Brakes
Do not interconnect the hydraulic brake system or
vacuum system of your vehicle with that of the trailer.
This could cause inadequate braking and possible
personal injury.
An electronically actuated trailer brake controller is
required when towing a trailer with electronically actu -
ated brakes. When towing a trailer equipped with a
hydraulic surge actuated brake system, an electronic
brake controller is not required.
Trailer brakes are recommended for trailers over
1,000 lb (453 kg) and required for trailers in excess of
2,000 lb (907 kg).
Integrated Trailer Brake Module (ITBM) —
If Equipped
Your vehicle may have an ITBM for Electric and Electric
Over Hydraulic (EOH) trailer brakes. The controller is
located below the instrument panel on the right side of the
steering column.
NOTE:This module has been designed and verified with electric
trailer brakes and EOH systems. Some previous EOH
systems may not be compatible with ITBM.
Total weight must be distributed between the tow
vehicle and the trailer such that the following four
ratings are not exceeded :
GVWR
GTW
GAWR
Tongue weight rating for the trailer hitch utilized
WARNING!
WARNING!
Do not connect trailer brakes to your vehicle's
hydraulic brake lines. It can overload your brake
system and cause it to fail. You might not have
brakes when you need them and could have an acci -
dent.
Towing any trailer will increase your stopping
distance. When towing, you should allow for addi -
tional space between your vehicle and the vehicle in
front of you. Failure to do so could result in an
accident.
CAUTION!
If the trailer weighs more than 1,000 lb (453 kg)
loaded, it should have its own brakes and they should
be of adequate capacity. Failure to do this could lead to
accelerated brake lining wear, higher brake pedal
effort, and longer stopping distances.
23_WS_OM_EN_USC_t.book Page 186
SAFETY247
Trailer Sway Control (TSC)
TSC uses sensors in the vehicle to recognize an
excessively swaying trailer and will take the appropriate
actions to attempt to stop the sway. TSC will become
active automatically once an excessively swaying trailer is
recognized.
NOTE:TSC cannot stop all trailers from swaying. Always use
caution when towing a trailer and follow the trailer tongue
weight recommendations
Úpage 178.
When TSC is functioning, the ESC Activation/Malfunction
Indicator Light will flash, the engine power may be reduced
and you may feel the brakes being applied to individual
wheels to attempt to stop the trailer from swaying. TSC is
disabled when the ESC system is in the “Partial Off” mode.
AUXILIARY DRIVING SYSTEMS
BLIND SPOT MONITORING (BSM)
BSM system uses two radar sensors, located inside the
rear fascia/bumper, to detect highway licensable vehicles
(automobiles, trucks, motorcycles, etc.) that enter the
blind spot zones from the rear/front/side of the vehicle.
Rear Detection Zones
When the vehicle is started, the BSM Warning Light will
momentarily illuminate in both outside rearview mirrors to
let the driver know that the system is operational. The
BSM system sensors operate when the vehicle is in any
forward gear.
The BSM detection zone covers approximately one lane in
width on both sides of the vehicle 12 ft (3.8 m). The zone
length starts at the side of the vehicle, near the B-pillar,
and extends approximately 10 ft (3 m) beyond the rear
fascia/bumper of the vehicle. The BSM system monitors
the detection zones on both sides of the vehicle when the
vehicle speed is 7 mph (11 km/h) or higher and will alert
the driver of vehicles in these areas. BSM will alert earlier
on faster-approaching vehicles – up to 33 mph (54 km/h)
difference.
NOTE:The BSM system detection zone DOES NOT change if your
vehicle is towing a trailer. Therefore, visually verify the
adjacent lane is clear for both your vehicle and trailer
before making a lane change. If the trailer or other object
(i.e., bicycle, sports equipment) extends beyond the side of your vehicle, this may result in random false detections
on the trailer, and false chimes when the turn signal is
used
Úpage 197.
The BSM system can become blocked if snow, ice, mud, or
other road contaminations accumulate on the rear fascia/
bumper where the radar sensors are located. The system
may also detect blockage if the vehicle is operated in
areas with extremely low radar returns such as a desert or
parallel to a large elevation drop. If blockage is detected,
a “Blind Spot Temporarily Unavailable, Sensor Blocked”
message will display in the cluster, both mirror lights will
illuminate, and BSM and RCP alerts will not occur. This is
normal operation. The system will automatically recover
and resume function when the condition clears or when
an ignition cycle occurs. To minimize system blockage, do
not block the area of the rear fascia/ bumper where the
radar sensors are located with foreign objects (bumper
stickers, bicycle racks, etc.) and keep it clear of road
contaminations.
Sensor Location (Left Side Shown)
WARNING!
If TSC activates while driving, slow the vehicle down,
stop at the nearest safe location, and adjust the trailer
load to eliminate trailer sway.
6
23_WS_OM_EN_USC_t.book Page 247
266SAFETY
Driver And Passenger Front Air Bag
Features
The Advanced Front Air Bag system has multistage driver
and front passenger air bags. This system provides output
appropriate to the severity and type of collision as
determined by the Occupant Restraint Controller (ORC),
which may receive information from the front impact
sensors (if equipped) or other system components.
The first stage inflator is triggered immediately during an
impact that requires air bag deployment. A low energy
output is used in less severe collisions. A higher energy
output is used for more severe collisions. This vehicle may be equipped with a driver and/or front
passenger seat belt buckle switch that detects whether
the driver or front passenger seat belt is buckled. The seat
belt buckle switch may adjust the inflation rate of the
Advanced Front Air Bags.
This vehicle may be equipped with driver and/or front
passenger seat track position sensors that may adjust the
inflation rate of the Advanced Front Air Bags based upon
seat position.
This vehicle is equipped with a right front passenger
Occupant Classification System (“OCS”) that is designed
to provide Passenger Advanced Front Air Bag output
appropriate to the occupant’s seated weight input, as
determined by the OCS.
Front Air Bag Operation
Front Air Bags are designed to provide additional
protection by supplementing the seat belts. Front air bags
are not expected to reduce the risk of injury in rear, side,
or rollover collisions. The front air bags will not deploy in all
frontal collisions, including some that may produce
substantial vehicle damage — for example, some pole
collisions, truck underrides, and angle offset collisions.
On the other hand, depending on the type and location of
impact, front air bags may deploy in crashes with little
vehicle front-end damage but that produce a severe initial
deceleration.
Because air bag sensors measure vehicle deceleration
over time, vehicle speed and damage by themselves are
not good indicators of whether or not an air bag should
have deployed.
Seat belts are necessary for your protection in all
collisions, and also are needed to help keep you in
position, away from an inflating air bag.
When the Occupant Restraint Controller (ORC) detects a
collision requiring the front air bags, it signals the inflator
units. A large quantity of non-toxic gas is generated to
inflate the front air bags.
The steering wheel hub trim cover and the upper
passenger side of the instrument panel separate and fold
out of the way as the air bags inflate to their full size. The
front air bags fully inflate in less time than it takes to blink
your eyes. The front air bags then quickly deflate while
helping to restrain the driver and front passenger.WARNING!
Being too close to the steering wheel or instrument
panel during front air bag deployment could cause
serious injury, including death. Air bags need room to
inflate. Sit back, comfortably extending your arms to
reach the steering wheel or instrument panel.
Never place a rear-facing child restraint in front of an
air bag. A deploying passenger front air bag can
cause death or serious injury to a child 12 years or
younger, including a child in a rear-facing child
restraint.
Never install a rear-facing child restraint in the front
seat of a vehicle. Only use a rear-facing child
restraint in the rear seat. If the vehicle does not have
a rear seat, do not transport a rear-facing child
restraint in that vehicle.
WARNING!
No objects should be placed over or near the air bag
on the instrument panel or steering wheel because
any such objects could cause harm if the vehicle is in
a collision severe enough to cause the air bag to
inflate.
Do not put anything on or around the air bag covers
or attempt to open them manually. You may damage
the air bags and you could be injured because the air
bags may no longer be functional. The protective
covers for the air bag cushions are designed to open
only when the air bags are inflating.
Relying on the air bags alone could lead to more
severe injuries in a collision. The air bags work with
your seat belt to restrain you properly. In some colli -
sions, air bags won’t deploy at all. Always wear your
seat belts even though you have air bags.
23_WS_OM_EN_USC_t.book Page 266
SAFETY267
Occupant Classification System (OCS) — Front Passenger Seat
The Occupant Classification System (OCS) is part of a Federally regulated safety system for this vehicle. It is designed to provide Passenger Advanced Front Air Bag output appropriate
to the occupant’s seated weight, as determined by the OCS.
The Occupant Classification System (OCS) consists of the following:
Occupant Restraint Controller (ORC)
Occupant Classification Module (OCM) and Sensor located in the front passenger seat
Air Bag Warning Light
Occupant Classification Module (OCM) And Sensor
The Occupant Classification Module (OCM) is located underneath the front passenger seat. The Sensor is located beneath the passenger seat cushion foam. Any weight on the seat
will be sensed by the Sensor. The OCM uses input from the Sensor to determine the front passenger’s most probable classification. The OCM communicates this information to the
ORC. The ORC may reduce the inflation rate of the Passenger Advanced Front Air Bag deployment based on occupant classification. In order for the OCS to operate as designed, it is
important for the front passenger to be seated properly and properly wearing the seat belt.
The OCS will NOT prevent deployment of the Passenger Advanced Front Air Bag. The OCS may reduce the inflation rate of the Passenger Advanced Front Air Bag if the OCS estimates that:
The front passenger seat is unoccupied or has very light objects on it; or
The front passenger seat is occupied by a small passenger, including a child; or
The front passenger seat is occupied by a rear-facing child restraint; or
The front passenger is not properly seated or his or her weight is taken off of the seat for a period of time.
* It is possible for a child to be classified as an adult, allowing a full-power Passenger Advanced Front Air Bag deployment. Never allow children to ride in the front passenger seat and
never install a child restraint system, including a rear-facing child restraint, in the front passenger seat. Front Passenger Seat Occupant Status
Front Passenger Air Bag Output
Rear-facing child restraint Reduced-power deployment
Child, including a child in a forward-facing child restraint or booster seat* Reduced-power deployment OR Full-power deployment
Properly seated adult Full-power deployment OR reduced-power deployment
Unoccupied seat Reduced-power deployment
6
23_WS_OM_EN_USC_t.book Page 267
268SAFETY
The OCS determines the front passenger’s most probable
classification. The OCS estimates the seated weight on the
front passenger seat and where that weight is located. The
OCS communicates the classification status to the ORC.
The ORC uses the classification to determine whether the
Passenger Advanced Front Air Bag inflation rate should be
adjusted.
In order for the OCS to operate as designed, it is important
for the front passenger to be seated properly and properly
wearing the seat belt. Properly seated passengers are:
Sitting upright
Facing forward
Sitting in the center of the seat with their feet comfort -
ably on or near the floor
Sitting with their back against the seatback and the
seatback in an upright position
Seated Properly
Lighter Weight Passengers (Including Small Adults)
When a lighter weight passenger, including a small adult,
occupies the front passenger seat, the OCS may reduce
the inflation rate of the Passenger Advanced Front Air Bag.
This does not mean that the OCS is working improperly.
Do not decrease OR increase the front passenger’s seated
weight on the front passenger seat
The front passenger’s seated weight must be properly
positioned on the front passenger seat. Failure to do so
may result in serious injury or death. The OCS determines
the most probable classification of the occupant that it
detects. The OCS will detect the front passenger’s
decreased or increased seated weight, which may result in
an adjusted inflation rate of the Passenger Advanced
Front Air Bag in a collision. This does not mean that the
OCS is working improperly. Decreasing the front
passenger’s seated weight on the front passenger seat
may result in a reduced-power deployment of the Passenger Advanced Front Air Bag. Increasing the front
passenger’s seated weight on the front passenger seat
may result in a full-power deployment of the Passenger
Advanced Front Air Bag.
Examples of improper front passenger seating include:
The front passenger’s weight is transferred to another
part of the vehicle (like the door, arm rest or instrument
panel).
The front passenger leans forward, sideways, or turns
to face the rear of the vehicle.
The front passenger’s seatback is not in the full upright
position.
The front passenger carries or holds an object while
seated (e.g., backpack, box, etc.).
Objects are lodged under the front passenger seat.
Objects are lodged between the front passenger seat
and center console.
Accessories that may change the seated weight on the
front passenger seat are attached to the front
passenger seat.
Anything that may decrease or increase the front
passenger’s seated weight.
The OCS determines the front passenger’s most probable
classification. If an occupant in the front passenger seat is
seated improperly, the occupant may provide an output
signal to the OCS that is different from the occupant’s
properly seated weight input, for example:
WARNING!
Never place a rear-facing child restraint in front of an
air bag. A deploying passenger front air bag can
cause death or serious injury to a child 12 years or
younger, including a child in a rear-facing child
restraint.
Never install a rear-facing child restraint in the front
seat of a vehicle. Only use a rear-facing child
restraint in the rear seat. If the vehicle does not have
a rear seat, do not transport a rear-facing child
restraint in that vehicle.
Children 12 years or younger should always ride
buckled up in the rear seat of a vehicle with a
rear seat.
23_WS_OM_EN_USC_t.book Page 268
SAFETY269
Not Seated Properly
Not Seated Properly Not Seated Properly
Not Seated Properly
WARNING!
If a child restraint system, child, small teenager or
adult in the front passenger seat is seated improp -
erly, the occupant may provide an output signal to
the OCS that is different from the occupant’s properly
seated weight input. This may result in serious injury
or death in a collision.
Always wear your seat belt and sit properly, with the
seatback in an upright position, your back against
the seatback, sitting upright, facing forward, in the
center of the seat, with your feet comfortably on or
near the floor.
Do not carry or hold any objects (e.g., backpacks,
boxes, etc.) while seated in the front passenger seat.
Holding an object may provide an output signal to the
OCS that is different than the occupant’s properly
seated weight input, which may result in serious
injury or death in a collision.
Placing an object on the floor under the front
passenger seat may prevent the OCS from working
properly, which may result in serious injury or death
in a collision. Do not place any objects on the floor
under the front passenger seat.
6
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