engine JEEP LIBERTY 2006 KJ / 1.G Repair Manual

FUEL TANK FILLER CAP (GAS CAP)
CAUTION!
•To avoid fuel spillage and overfilling, do not “top
off” the fuel tank after filling.
•DO NOT put gasoline in your diesel vehicle (if
equipped). If you accidentally put gasoline in
your vehicle, DO NOT start the engine. This will
cause damage to the fuel system. Have the fuel
system flushed.
The gas cap is located behind the fuel filler door, on the
left side of the vehicle. If the gas cap is lost or damaged,
be sure the replacement cap has been designed for use
with this vehicle. When tightening the gas cap, tighten until 2 or 3 clicks
are heard to insure that the cap is properly seated.
Fuel Filler Cap
STARTING AND OPERATING 281
5

Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines that the fuel
filler cap is loose, improperly installed, or damaged, a
“GAS CAP” message will be displayed in the odometer
(located on the instrument cluster). Replace, or tighten
the fuel filler cap properly to turn the message off (light
will time out). If the problem continues, the message will
appear the next time the vehicle is started. Refer to
“Onboard Diagnostic System — OBDII” in Section 7 of
this manual for more information. (See page 316 for more
information.)
CAUTION!
Damage to the fuel system or emission control
system could result from using an improper fuel
tank filler cap (gas cap). A poorly fitting cap could let
impurities into the fuel system.
WARNING!
•Never add fuel when the engine is running.
•Never have any smoking materials lit in or near
the vehicle when the fuel cap is removed or the
tank filled.
TRAILER TOWING
In this section you will find safety tips and information
on limits to the type of towing you can reasonably do
with your vehicle. Before towing a trailer carefully re-
view this information to tow your load as efficiently and
safely as possible.
To maintain warranty coverage, follow the requirements
and recommendations in this manual concerning ve-
hicles used for trailer towing.
282 STARTING AND OPERATING

Engine/
Transmission Model
GVWR
(Gross Vehicle Wt.
Rating) GCWR
(Gross Combined
Wt. Rating) Frontal Area
Max. GTW
(Gross Trailer Wt.) Max.
Tongue Wt.
(See Note 1)
3.7L/6-Speed Manual 4x2 5,350 lbs (2 427 kg) 8,500 lbs (3 855 kg) 40 Sq. Ft. (3.72
square meters) 3,500 lbs (1 587 kg) 350 lbs (159 kg)
3.7L/6-Speed Manual 4x4 5,600 lbs (2 540 kg) 8,750 lbs (3 969 kg) 40 Sq. Ft. (3.72
square meters) 3,500 lbs (1 587 kg) 350 lbs (159 kg)
3.7L/
Automatic 4x2 5,350 lbs (2 427 kg) 7,150 lbs (3 243 kg) 32 Sq. Ft. (2.97
square meters) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.7L/
Automatic 4x4 5,600 lbs (2 540 kg) 7,400 lb
s ( 3 356 kg) 32 Sq. Ft. (2.97
square meters) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.7L/
Automatic
w/ Cooler 4x2 5,350 lbs (2 427 kg) 9,850 lbs (4 468 kg) 60 Sq. Ft. (5.57
square meters) 5,000 lbs (2 268 kg) 500 lbs (227 kg)
3.7L/
Automatic w/Cooler 4x4 5,600 lbs (2 540 kg) 10,100 lbs (4 581 kg) 60 Sq. Ft. (5.57
square meters) 5,000 lbs (2 268 kg) 500 lbs (227 kg)
2.8L Diesel/ Automatic 4x4 5,650 lbs (2 563 kg) 10,150 lbs (4 604 kg) 60 Sq. Ft. (5.57
square meters) 5,000 lbs (2 268 kg) 500 lbs (227 kg)
Refer to local laws for maximum trailer towing speeds.
286 STARTING AND OPERATING

WARNING!
Improper towing can lead to an injury accident.
Follow these guidelines to make your trailer towing
as safe as possible:
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 an accident.
•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, suspension, chas-
sis structure or tires.
•Safety chains must always be used between your
vehicle and trailer. Always connect the chains to the
frame or 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 automatic transmission in
P for Park. With a manual transmission, shift the
transmission into reverse. And with four-wheel-drive
vehicles, make sure the transfer case is not in neutral.
Always, block or chockthe trailer wheels.
•GCWR must not be exceeded.
•Total weight must be distributed between the tow
vehicle and the trailer such that the following four
ratings are not exceeded:
1. GVWR
STARTING AND OPERATING 289
5

If using a manual transmission vehicle for trailer towing,
all starts must be in FIRST gear to avoid excessive clutch
slippage.
Towing Tips — Automatic Transmission
The “D” range can be selected when towing. However, if
frequent shifting occurs while in this range, the “3” range
should be selected.
NOTE: Using the “3” range while operating the vehicle
under heavy operating conditions will improve perfor-
mance and extend transmission life by reducing exces-
sive shifting and heat build up. This action will also
provide better engine braking.
The automatic transmission fluid and filter should be
changed if you REGULARLY tow a trailer for more than
45 minutes of continuous operation. See Schedule “B” in
section 8 of this manual for transmission fluid change
intervals. NOTE:
Check the automatic transmission fluid level
before towing.
Towing Tips — O/D OFF (If Equipped)
To reduce potential for automatic transmission overheat-
ing, press the “O/D OFF” button when driving in hilly
areas or shift the transmission to Drive position 2 on
more severe grades. Refer to “Transmission Shifting” in
this section.
Towing Tips — Electronic Speed Control (If
Equipped)

Don’t use in hilly terrain or with heavy loads.
When using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
Use speed control in flat terrain and with light loads to
maximize fuel efficiency.
STARTING AND OPERATING 293
5

Towing Tips — Cooling System
To reduce potential for engine and transmission over-
heating, take the following actions:
City Driving
When stopped for short periods of time, put transmission
in neutral and increase engine idle speed.
Highway Driving
Reduce speed.
Air Conditioning
Turn off temporarily.
refer to Cooling System Operating information in the
Maintenance section of this manual for more informa-
tion.
RECREATIONAL TOWING (BEHIND
MOTORHOME, ETC.)
Towing – 2WD Models
Recreational towing is not allowed. Towing with the
rear wheels on the ground can result in severe transmis-
sion damage.
Towing — 4WD Models
CAUTION!
Front or rear wheel lifts should not be used. Internal
damage to the transmission or transfer case will
occur if a front or rear wheel lift is used when
recreational towing.
294 STARTING AND OPERATING

NOTE:The transfer case must be shifted into N (Neu-
tral), and the transmission must be shifted into P (Park)
(for automatic transmission) or into any forward gear (for
manual transmission) for recreational towing.
Shifting Into Neutral (N)
Use the following procedure to prepare your vehicle for
recreational towing.
CAUTION!
It is necessary to follow these steps to be certain that
the transfer case is fully in N (Neutral) before
recreational towing to prevent damage to internal
parts.
1. Depress brake pedal.
2. Shift transmission into N (Neutral). 3. Shift transfer case lever into N (Neutral).
4. Start engine.
5. Shift automatic transmission into D (Drive) or manual
transmission into any forward gear.
6. Release brake pedal and ensure that there is no vehicle
movement.
7. Shut the engine OFF and place the ignition key into
the unlocked OFF position.
8. Shift automatic transmission into P (Park) or ensure
manual transmission is in any forward gear.
9. Apply parking brake.
10. Attach vehicle to the tow vehicle with tow bar.
11. Release parking brake.
STARTING AND OPERATING 295
5

CAUTION!
Transmission damage may occur if the automatic
transmission is shifted into P (Park) with the transfer
case in N (Neutral) and the engine running. With the
transfer case in N (Neutral) ensure that the engine is
OFF prior to shifting the transmission into P (Park)
(refer to step s7–8above).
Shifting Out Of Neutral (N)
Use the following procedure to prepare your vehicle for
normal usage.
1. Shift transmission into N (Neutral).
2. Turn engine off.
3. Shift transfer case lever to desired position.
4. Shift automatic transmission into P (Park). 5. Start engine.
6. Shift automatic transmission into D (Drive) or manual
transmission into any forward gear.
WARNING!
You or others could be injured if you leave the
vehicle unattended with the transfer case in the N
(Neutral) position without first fully engaging the
parking brake. The transfer case N (Neutral) position
disengages both the front and rear driveshafts from
the powertrain and will allow the vehicle to move
regardless of the transmission position. The parking
brake should always be applied when the driver is
not in the vehicle.
296 STARTING AND OPERATING

WHAT TO DO IN EMERGENCIES
CONTENTS

Hazard Warning Flashers .................300

If Your Engine Overheats .................301

Jacking And Tire Changing ................302
▫ Jack Location ........................303
▫ Spare Tire Stowage ....................303
▫ Preparations For Jacking ................304 ▫
Jacking Instructions ....................304

Jump Starting — Gasoline Engines ..........307

Emergency Tow Hooks — If Equipped ........309

Towing A Disabled Vehicle ................310
▫ 2WD Models Only ....................310
▫ 4WD Models Only ....................310
6

IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate ac-
tion.
•On the highways — Slow down.
•In city traffic — While stopped, put transmission in N
(Neutral), but do not increase engine idle speed.
NOTE: There are steps that you can take to slow down
an impending overheat condition. If your air conditioner
is on, turn it off. The air conditioning system adds heat to
the engine cooling system and turning off the A/C
removes this heat. You can also turn the Temperature
Control to maximum heat, the Mode Control to floor, and
the Fan Control to High. This allows the heater core to act
as a supplement to the radiator and aids in removing heat
from the engine cooling system. If the pointer rises to the “H” (hot mark) on a vehicle
equipped with a
gasoline engine, pull over and stop the
vehicle. Do not turn the engine off. Idle the vehicle with
the air conditioning turned off, until the pointer drops
back into the normal range.CAUTION!
Driving with a hot cooling system could damage
your vehicle. If the temperature gauge reads “H”,
pull over and stop the vehicle. Idle the vehicle with
the air conditioner turned off until the pointer drops
back into the normal range. If the pointer remains on
the “H”, and you hear continuous chimes, turn the
engine off immediately, and call for service.
WHAT TO DO IN EMERGENCIES 301
6