ECU JEEP LIBERTY 2012 KK / 2.G Service Manual

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.
Loading
The actual total weight and the weight of the front and
rear of your vehicle at the ground can best be determined
by weighing it when it is loaded and ready for operation.
The entire vehicle should first be weighed on a commer-
cial scale to ensure that the GVWR has not been ex-
ceeded. The weight on the front and rear of the vehicle
should then be determined separately to be sure that the
load is properly distributed over front and rear axle.
Weighing the vehicle may show that the GAWR of either
the front or rear axles has been exceeded, but the total
load is within the specified GVWR. If so, weight must be
shifted from front to rear, or rear to front, as appropriateuntil the specified weight limitations are met. Store the
heavier items down low and be sure that the weight is
distributed equally. Stow all loose items securely before
driving.
Improper weight distributions can have an adverse affect
on the way your vehicle steers and handles, and the way
the brakes operate.
CAUTION!
Do not load your vehicle any heavier than the GVWR
or the maximum front and rear GAWR. If you do,
parts on your vehicle can break, or it can change the
way your vehicle handles. This could cause you to
lose control. Also, overloading can shorten the life of
your vehicle.
408 STARTING AND OPERATING

WARNING! (Continued)
•Make certain that the load is secured in the trailer
and that is 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
overload your vehicle or trailer. Overloading can
cause a loss of control, poor performance, or dam-
age to brakes, axle, engine, transmission, steering,
suspension, chassis 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.(Continued)
WARNING! (Continued)
•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. Always, block orchockthe 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
2. GTW
3. GAWR
4. Tongue weight rating for the trailer hitch uti-
lized (This requirement may limit the ability to
always achieve the 10% to 15% range of tongue
weight as a percentage of total trailer weight).
5
STARTING AND OPERATING 419

Recreational Towing — Two-Wheel Drive Models
Recreational towing is allowed ONLY if the rear wheels
areOFF the ground. This may be accomplished using a
tow dolly or vehicle trailer. If using a tow dolly, follow
this procedure:
1. Properly secure the dolly to the tow vehicle, following
the dolly manufacturer’s instructions.
2. Drive the rear wheels onto the tow dolly.
3. Firmly set the parking brake. Place the transmission in
PARK.
4. Properly secure the rear wheels to the dolly, following
the dolly manufacturer’s instructions.
5. Remove the ignition key.
6. Install a suitable clamping device, designed for tow-
ing, to secure the front wheels in the straight position. Flat towing (with all four wheels on the ground) is
allowed ONLY if the driveshaft is removed.
Towing
with the rear wheels on the ground while the driveshaft
is connected will result in severe transmission damage.
WARNING!
If the driveshaft is removed, the vehicle can roll even
if the transmission is in PARK, which could cause
serious injury or death.
The parking brake mustbe firmly engaged and the
wheels chocked during driveshaft removal and installa-
tion. The parking brake must remainengaged unless the
vehicle is securely and properly connected to the tow
vehicle, or the driveshaft is completely reinstalled. See
your authorized dealer for proper driveshaft removal
and reinstallation procedures, including flange
orientation/alignment, use of thread-locking compound,
proper bolt torque specifications, etc.
5
STARTING AND OPERATING 425

CAUTION!
Be sure to mount the spare tire with the valve stem
facing outward. The vehicle could be damaged if the
spare tire is mounted incorrectly.
WARNING!
To avoid the risk of forcing the vehicle off the jack,
do not tighten the wheel nuts fully until the vehicle
has been lowered.
8. Lower the vehicle by turning the jack screw to the left,
and remove the jack.
9. Finish tightening the lug nuts. Push down on the
wrench while at the end of the handle for increased
leverage. Tighten the lug nuts in a star pattern until each
nut has been tightened twice. The correct wheel nut
tightness is 95 ft lb (130 N·m). If in doubt about the
correct tightness, have them checked with a torque
wrench by your authorized dealer or at a service station.
10. Lower the jack to it’s fully closed position.
11. Secure the tire, jack, and tools in their proper loca-
tions.
Mounting Spare Tire
442 WHAT TO DO IN EMERGENCIES

If the vehicle’s battery is discharged, refer to “Shift Lever
Override” in “What To Do In Emergencies” for instruc-
tions on shifting the automatic transmission out of the
PARK position for towing.
CAUTION!
•Do not attempt to use sling type equipment when
towing. When securing the vehicle to a flat bed
truck, do not attach to front or rear suspension
components. Damage to your vehicle may result
from improper towing.
•If the vehicle being towed requires steering, the
ignition must be in the ON/RUN or ACC position,
not in the LOCK/OFF position.
Towing Without The Ignition Key Fob
Special care must be taken when the vehicle is towed
with the ignition in the LOCK/OFF position. The only
approved method of towing without the ignition key is
with a flatbed truck. Proper towing equipment is neces-
sary to prevent damage to the vehicle.
Two-Wheel Drive Models
The manufacturer recommends towing your vehicle with
all four wheelsOFFthe ground using a flatbed.
If flatbed equipment is not available, and the transmis-
sion is operable, the vehicle may be towed (with rear
wheels on the ground) with the transmission in NEU-
TRAL. Speed must not exceed 30 mph (48 km/h) and the
distance must not exceed 15 miles (24 km).
452 WHAT TO DO IN EMERGENCIES

CAUTION!
Towing faster than 30 mph (48 km/h) or farther than
15 miles (24 km) with rear wheels on the ground can
cause severe damage to the transmission. Such dam-
age is not covered by the New Vehicle Limited
Warranty.
If the transmission is not operable, or the vehicle must be
towed faster than 30 mph (48 km/h) or farther than
15 miles (24 km), tow with the rear wheels OFFthe
ground (on a flatbed, or with the rear wheels raised using
a wheel lift or towing dolly), or remove the driveshaft.
WARNING!
If the driveshaft is removed, the vehicle can roll even
if the transmission is in PARK, which could cause
serious injury or death.
The parking brake mustbe firmly engaged and the
wheels chocked during driveshaft removal and installa-
tion. The parking brake must remainengaged unless the
vehicle is securely and properly connected to the tow
vehicle, or the driveshaft is completely reinstalled. See
your authorized dealer for proper driveshaft removal
and reinstallation procedures, including flange
orientation/alignment, use of thread-locking compound,
proper bolt torque specifications, etc.
6
WHAT TO DO IN EMERGENCIES 453

WARNING! (Continued)
•To avoid contamination from foreign matter or
moisture, use only new brake fluid or fluid that
has been in a tightly closed container. Keep the
master cylinder reservoir cap secured at all times.
Brake fluid in a open container absorbs moisture
from the air resulting in a lower boiling point.
This may cause it to boil unexpectedly during hard
or prolonged braking, resulting in sudden brake
failure. This could result in a collision.
•Overfilling the brake fluid reservoir can result in
spilling brake fluid on hot engine parts, causing
the brake fluid to catch fire. Brake fluid can also
damage painted and vinyl surfaces, care should be
taken to avoid its contact with these surfaces.(Continued)
WARNING! (Continued)
•Do not allow petroleum based fluid to contami-
nate the brake fluid. Brake seal components could
be damaged, causing partial or complete brake
failure. This could result in a collision.
Automatic Transmission
Selection Of Lubricant
It is important that the proper lubricant is used in the
transmission to assure optimum transmission perfor-
mance. Use only manufacturer’s recommended transmis-
sion fluid. Refer to “Fluids, Lubricants, and Genuine
Parts” in “Maintaining Your Vehicle” for further informa-
tion. It is important that the transmission fluid be main-
tained at the prescribed level using the recommended
fluid.
480 MAINTAINING YOUR VEHICLE

About Your Brakes....................... 351
ABS (Anti-Lock Brake System) ............353,356
Adding Engine Coolant (Antifreeze) .......... 475
Adding Fuel ........................... 404
Additives, Fuel ......................... 402
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 465
Air Conditioner Maintenance ............... 467
Air Conditioning ........................ 301
Air Conditioning Controls ................. 301
Air Conditioning Filter .................312,468
Air Conditioning Refrigerant .............467,468
Air Conditioning System .............301,305,467
Air Conditioning, Operating Tips ............ 313
Air Filter .............................. 465
Air Pressure, Tires ....................... 378
Airbag ................................ 59
Airbag Deployment ....................... 74
Airbag Light ..................... 67,76,90,239
Airbag Maintenance ....................... 75 Airbag, Window (Side Curtain)
............... 63
Alarm (Security Alarm) .................18,238
Alarm System (Security Alarm) ............... 18
Alarm, Panic ............................ 24
Alterations/Modifications, Vehicle ............. 8
Antenna, Satellite Radio ................270,295
Anti-Lock Brake System (ABS) ............353,356
Anti-Lock Warning Light .................. 229
Anti-Theft Security Alarm (Theft Alarm) ........ 18
Anti-Theft System ....................... 238
Antifreeze (Engine Coolant) ..............474,502
Disposal ........................... 477
Appearance Care ........................ 486
Arming Theft System (Security Alarm) ......... 18
Assist, Hill Start ........................ 358
Assistance Towing ....................... 117
Auto Down Power Windows ................ 36
Auto Unlock, Doors ....................... 32
Automatic Dimming Mirror ................ 100
534 INDEX

Rotation, Tires.......................... 388
Safety Checks Inside Vehicle ................. 90
Safety Checks Outside Vehicle ............... 92
Safety Defects, Reporting .................. 528
Safety Information, Tire ................... 368
Safety Tips ............................. 88
Safety, Exhaust Gas ....................... 89
Satellite Radio Antenna .................270,295
Schedule, Maintenance .................... 506
Seat Belt Maintenance .................... 492
Seat Belt Reminder ....................... 57
Seat Belts ............................ 45,90
Adjustable Upper Shoulder Anchorage ...... 49
And Pregnant Women .................. 58
Child Restraint ................... 78,79,85
Extender ........................... 58
Front Seat .......................... 45
Inspection .......................... 90 Pretensioners
........................ 53
Reminder .......................... 236
Shoulder Belt Anchorage ................ 49
Untwisting Procedure .................. 50
Seats ................................. 138
Adjustment ......................... 138
Easy Entry ......................... 155
Head Restraints ...................... 145
Heated ............................ 140
Height Adjustment ................... 139
Lumbar Support ..................... 144
Memory ........................... 151
Power ............................ 139
Rear Folding ........................ 149
Reclining .......................... 143
Seatback Release ..................... 149
Tilting ............................ 139
Security Alarm (Theft Alarm) .............18,238
Selec-Trac Operation ...................... 339
10
INDEX 549

SteeringPower .......................... 349,350
Tilt Column ...................... 171,172
Wheel, Tilt ...................... 171,172
Steering Wheel Audio Controls .............. 298
Steering Wheel Mounted Sound
System Controls ......................... 298
Storage ............................... 206
Storage Bin ............................ 206
Storage, Vehicle ......................... 311
Stuck, Freeing .......................... 448
Sun Roof .............................. 193
Sun Roof (Sky Slider Power) .............196,484
Sun Visor Extension ...................... 103
Sunroof Maintenance ..................... 196
Supplemental Restraint System - Airbag ........ 59
Synthetic Engine Oil ...................... 464
System, Remote Starting .................... 27 Tachometer
............................ 229
Temperature Control, Automatic (ATC) ........ 305
Temperature Gauge, Engine Coolant .......... 231
Tether Anchor, Child Restraint ............... 82
Text Messaging ......................... 125
Theft Alarm (Security Alarm) ................ 18
Theft System (Security Alarm) ............... 18
Tie Down Hooks, Cargo ................... 210
Tilt Steering Column ................... 171,172
Time Delay, Headlight .................... 160
Tip Start .............................. 320
Tire and Loading Information Placard ......... 373
Tire Identification Number (TIN) ............. 371
Tire Markings .......................... 368
Tire Safety Information .................... 368
Tires ............................ 92,377,531
Air Pressure ........................ 378
Chains ............................ 386
Changing .......................... 435
10
INDEX 551