JEEP WRANGLER 2011 JK / 3.G Workshop Manual

COMMAND-TRAC®/
ROCK-TRAC
®
• The transfer case provides four mode positions: 2H (Two-wheel drive high
range), 4H (Four-wheel drive high
range), N (Neutral), and 4L
(Four-wheel drive low range).
• The transfer case is intended to be driven in the 2H position for normal
street and highway conditions such
as hard-surfaced roads.
• Shifting between 2H and 4H can be made with the vehicle stopped or in
motion. Shift the transfer case lever
firmly to 4H at any speed up to
50 mph (80 km/h).
• Shifting between 4H and 4L can be made with the vehicle rolling at 2 to
3 mph (3 to 5 km/h). Shift the
automatic transmission into
NEUTRAL or fully depress the clutch
pedal on a manual transmission. Shift
the transfer case lever firmly to 4L (do
not pause with the transfer case in
NEUTRAL). Once the shift is
completed, place the automatic
transmission into DRIVE or release
the clutch pedal on a manual
transmission.
NOTE: To enhance off-road performance
in 4L mode, manual transmission vehicles will start regardless of whether or not the
clutch pedal is depressed.
AXLE LOCK (TRU-LOK®)
RUBICON ONLY
• The AXLE LOCK switch is located on the instrument panel (to the left of the
steering column).
• This feature will only activate when the following conditions are met:
• Key in ignition, vehicle in 4L (Low)
range.
• Vehicle speed at 10 mph (16 km/h) or less.
• Press the bottom of the AXLE LOCK switch once to lock the rear axle only
and a second time to lock the front
axle (the rear and front axle lock
indicator lights will illuminate).
• To unlock the axles, press the top of the AXLE LOCK switch.
• The indicator light will flash until the axles are fully locked or unlocked.
ELECTRONIC SWAY BAR
DISCONNECT – RUBICON
ONLY
Off-Road
• Press the SWAY BAR switch, locatedon the instrument panel (to the left of
the steering column), once to
disconnect the Sway Bar.
• The Sway Bar indicator light will illuminate in the instrument cluster.
On-Road
• Press the SWAY BAR switch asecond time to reconnect the Sway
Bar.
• The Sway Bar should remain in on-road mode during normal driving
conditions.
OFF-ROAD CAPABILITIES
49

TRAILER TOWING WEIGHTS (MAXIMUM TRAILER WEIGHT RATINGS)
Engine/
Transmission Axle Model
GCWR (Gross
Combined Wt.
Rating) Frontal Area
Max. GTW (Gross
Trailer Wt.) Max. Trailer
Tongue Wt. (See
Note)
3.8L/Manual 3.21 Two–Door Sport Model (4WD)5,329 lbs (2 417 kg) 25 sq ft (2.32 sq m) 1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/Manual 3.73 Two–Door Sport Model (4WD)6,329 lbs (2 871 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Automatic 3.73 Two–Door Sport
Model (4WD) 6,353 lbs (2 881 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/Manual 3.21 Two–Door Sahara Model(4WD) 5,430 lbs (2 463 kg) 25 sq ft (2.32 sq m) 1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/Manual 3.73 Two–Door Sahara Model(4WD) 6,430 lbs (2 916 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Automatic 3.73 Two–Door
Sahara Model(4WD) 6,454 lbs (2 927 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/Manual 4.10 2–Door Rubicon Model (4WD)6,507 lbs (2 951 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Automatic 4.10 Two–Door
Rubicon Model(4WD) 6,533 lbs (2 963 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/Manual 3.21 Four–Door Sport Model (4WD)5,742 lbs (2 604 kg) 32 sq ft (2.97 sq m) 1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/Manual 3.73 Four–Door SportModel(4WD) 8,242 lbs (3 738 kg) 32 sq ft (2.97 sq m) 3,500 lbs (1 587 kg) 350 lbs (159 kg)
UTILITY
50

Engine/
Transmission Axle Model
GCWR (Gross
Combined Wt.
Rating) Frontal Area
Max. GTW (Gross
Trailer Wt.) Max. Trailer
Tongue Wt. (See
Note)
3.8L/
Automatic 3.73 Four–Door Sport
Model (4WD) 8,257 lbs (3 745 kg) 32 sq ft (2.97 sq m) 3,500 lbs (1 587 kg) 350 lbs (159 kg)
3.8L/Manual 3.21 Four–Door Sahara Model(4WD) 5,782 lbs (2 623 kg) 32 sq ft (2.97 sq m) 1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/Manual 3.73 Four–Door Sahara Model(4WD) 8,282 lbs (3 757 kg) 32 sq ft (2.97 sq m) 3,500 lbs (1 587 kg) 350 lbs (159 kg)
3.8L/
Automatic 3.73 Four–Door
Sahara Model(4WD) 8,297 lbs (3 763 kg) 32 sq ft (2.97 sq m) 3,500 lbs (1 587 kg) 350 lbs (159 kg)
3.8L/Manual 4.10 Four–Door Rubicon Model(4WD) 8,406 lbs (3 813 kg) 32 sq ft (2.97 sq m) 3,500 lbs (1 587 kg) 350 lbs (159 kg)
3.8L/
Automatic 4.10 Four–Door
Rubicon Model(4WD) 8,431 lbs (3 824 kg) 32 sq ft (2.97 sq m) 3,500 lbs (1 587 kg) 350 lbs (159 kg)
Refer to local laws for maximum trailer towing speeds.
NOTE: The trailer tongue weight must be considered as part of the combined weight of occupants and cargo (ie. the GVWR),
and the GVWR should never exceed the weight referenced on the Tire and Loading Information placard.
UTILITY
51

OVERDRIVE OFF SWITCH
• Overdrive can be locked out bypressing the O/D OFF switch located
on the center console. An indicator
light in the instrument cluster will
illuminate to show that the switch has
been activated. Pressing the switch a
second time restores the Overdrive
function.
• When frequent transmission shifting occurs while using Overdrive, such as
when operating the vehicle under
heavy load conditions (for example, in
hilly terrain, strong head winds, or
trailer towing), turning off overdrive will
improve performance and extend
transmission life by reducing
excessive shifting and heat buildup.
RECREATIONAL TOWING
(BEHIND MOTORHOME)
Towing - Two-Wheel Drive
Models
• Recreational towing with all fourwheels on the ground is allowed
ONLY if the rear driveshaft is
removed. See your authorized dealer
or refer to the Service Manual. Towing
with the rear wheels on the ground
while the driveshaft is connected can
result in severe transmission damage. • The parking brake must be firmly
engaged and the wheels chocked
during driveshaft removal and
installation. The parking brake must
remain engaged 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.
Towing - Four-Wheel Drive
Models
NOTE: The transfer case must be shifted
into N (Neutral), automatic transmission
must be shifted into PARK,and manual
transmission must be placed in gear (NOT
in NEUTRAL) for recreational towing.
• Bring the vehicle to a complete stop,turn off the engine and press and hold
the brake pedal.
• Shift the automatic transmission into NEUTRAL or depress the clutch
pedal on a manual transmission.
• Shift the transfer case lever into N (Neutral).
• Start the engine and shift the transmission into REVERSE.
• Release the brake pedal (and clutch pedal on manual transmissions) for
five seconds and ensure that there is
no vehicle movement.
• Repeat the previous step with automatic transmission in DRIVE or
manual transmission in first gear.
• Turn OFF the engine and leave the ignition switch in the unlocked OFF
position.
• Firmly apply the parking brake and shift the transmission into PARK or
place manual transmission in gear
(NOT in Neutral).
UTILITY
52

• Attach the vehicle to the tow vehicleusing a suitable tow bar and release
the parking brake.
• Disconnect the negative battery cable, and secure it away from the
negative battery post.
• Refer to your Owner's Manual on the DVD for further details.
CAUTION!
• Front or rear wheel lifts should notbe used. Internal damage to the
transmission or transfer case will
occur if a front or rear wheel lift is
used when recreational towing.
• Tow only in the forward direction. Towing this vehicle backwards can
cause severe damage to the
transfer case.
• Automatic transmissions must be placed in the PARK position for
recreational towing.
• Manual transmissions must be placed in gear (not in Neutral) for
recreational towing.
• Before recreational towing, perform the procedure outlined under
“Shifting Into NEUTRAL” to be
certain that the transfer case is
fully in NEUTRAL. Otherwise,
internal damage will result.
(Continued)
CAUTION!(Continued)
• Towing this vehicle in violation ofthe above requirements can cause
severe transmission and/or transfer
case damage. Damage from
improper towing is not covered
under the New Vehicle Limited
Warranty.
• Do not use a bumper-mounted clamp-on tow bar on your vehicle.
The bumper face bar will be
damaged.
• 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.
WARNING!
• You or others could be injured ifyou 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,
even if the transmission is in PARK.
The parking brake should always
be applied when the driver is not in
the vehicle.
UTILITY
53

24-HOUR TOWING ASSISTANCE
• Dial toll-free 1-800-521-2779 or 1-800-363-4869 for Canadian residents.
• Provide your name, vehicle identification number and license plate number.
• Provide your location, including telephone number, from which you are calling.
• Briefly describe the nature of the problem and answer a few simple questions.
• You will be given the name of the service provider and an estimated time of arrival. Ifyou feel you are in an “unsafe situation”, please let us know. With your consent, we
will contact local police or safety authorities.
INSTRUMENT CLUSTER WARNING LIGHTS
- Electronic Stability Control (ESC) Activation/MalfunctionIndicator Light
• If the “ESC Activation/Malfunction Indicator Light” comes on continuously with the
engine running, a malfunction has been detected in the ESC system. If this light
remains on after several ignition cycles, and the vehicle has been driven several
miles (kilometers) at speeds greater than 30 mph (48 km/h), we recommend you
drive to the nearest service center and have the vehicle serviced immediately.
• The “ESC Activation/Malfunction Indicator Light” starts to flash as soon as the tires lose traction and the ESC system becomes active. If the 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. The light also
flashes when TCS is active. To improve the vehicle's traction when starting off in
deep snow, sand or gravel, it may be desirable to switch the ESC system to Partial
Off mode by momentarily pressing the ESC Off
switch.
- Tire Pressure Monitoring System (TPMS) Light
• Each tire, including the spare (if provided), should be checked monthly, when coldand inflated to the inflation pressure recommended by the vehicle manufacturer on
the vehicle placard or tire inflation pressure label. (If your vehicle has tires of a
different size than the size indicated on the vehicle placard or tire inflation pressure
label, you should determine the proper tire inflation pressure for those tires.)
• As an added safety feature, your vehicle has been equipped with a Tire Pressure Monitoring System (TPMS) that illuminates a low tire pressure telltale when one or
more of your tires is significantly under-inflated. Accordingly, when the low tire
pressure telltale illuminates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving on a significantly
under-inflated tire causes the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire tread life, and may affect the
vehicle’s handling and stopping ability.
• IF THE LIGHT STARTS FLASHING INDICATING A LOW TIRE PRESSURE,
ADJUST THE AIR PRESSURE IN THE LOW TIRE TO THE AIR PRESSURE
SHOWN ON THE VEHICLE PLACARD OR TIRE INFLATION PRESSURE
LABEL LOCATED ON THE DRIVER'S DOOR. NOTE: AFTER INFLATION, THE
VEHICLE MAY NEED TO BE DRIVEN FOR 20 MINUTES BEFORE THE
FLASHING LIGHT WILL TURN OFF.
WHAT TO DO IN EMERGENCIES
54

• Please note that the TPMS is not a substitute for proper tire maintenance, and it isthe driver’s responsibility to maintain correct tire pressure, even if under-inflation has
not reached the level to trigger illumination of the TPMS low tire pressure telltale.
• Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when the system is not operating properly. The TPMS malfunction indicator is
combined with the low tire pressure telltale. When the system detects a malfunction,
the telltale will flash for approximately one minute and then remain continuously
illuminated. This sequence will continue each time the vehicle is restarted as long as
the malfunction exists.
• When the malfunction indicator is illuminated, the system may not be able to detect or signal low tire pressure as intended. TPMS malfunctions may occur for a variety of
reasons, including the installation of replacement or alternate tires or wheels on the
vehicle that prevent the TPMS from functioning properly. Always check the TPMS
malfunction telltale after replacing one or more tires or wheels on your vehicle, to
ensure that the replacement or alternate tires and wheels allow the TPMS to
continue to function properly.
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 operation 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.
- Engine Temperature Warning Light
• This light warns of an overheated engine condition.
• If the light turns on and a warning chime sounds while driving, safely pull over andstop the vehicle. If the A/C system is on, turn it off. Also, shift the transmission into
NEUTRAL and idle the vehicle. If the temperature reading does not return to normal,
turn the engine off immediately.
• We recommend that you do not operate the vehicle or engine damage will occur. Have the vehicle serviced immediately.
WARNING!
A hot engine cooling system is dangerous. You or others could be badly burned
by steam or boiling coolant. You may want to call an authorized service center for
service if your vehicle overheats.
WHAT TO DO IN EMERGENCIES
55

BRAKE- Brake Warning Light
• The Brake Warning light illuminates when there is either a system malfunction or theparking brake is applied. If the light is on and the parking brake is not applied, it
indicates a possible brake hydraulic malfunction, brake booster problem or an
Anti-Lock Brake System problem.
• We recommend you drive to the nearest service center and have the vehicle serviced immediately.
WARNING!
Driving a vehicle with the red brake light on is dangerous. Part of the brake
system may have failed. It will take longer to stop the vehicle. You could have a
collision. Have the vehicle checked immediately.
- Malfunction Indicator Light (MIL)
• Certain conditions, such as a loose or missing gas cap, poor fuel quality, etc., mayilluminate the MIL after engine start. The vehicle should be serviced if the light stays
on through several typical driving cycles. In most situations, the vehicle will drive
normally and not require towing.
• If the MIL flashes when the engine is running, serious conditions may exist that could lead to immediate loss of power or severe catalytic converter damage. We
recommend you do not operate the vehicle. Have the vehicle serviced immediately.
- Electronic Stability Control OFF Warning Light
• If the ESC OFF warning light comes on continuously with the engine running, amalfunction has been detected.
• If this light remains on after several ignition cycles, and the vehicle has been driven several miles (kilometers) at speeds greater than 30 mph (48 km/h), we recommend
you drive to the nearest service center and have the vehicle serviced immediately.
- Charging System Light
• This light shows the status of the electrical charging system. If the charging systemlight remains on, it means that the vehicle is experiencing a problem with the
charging system.
• We recommend you do not continue driving if the charging system light is on. Have the vehicle serviced immediately.
- Oil Pressure Warning Light
• This light indicates low engine oil pressure. If the light turns on while driving, stop thevehicle and shut off the engine as soon as possible. A chime will sound for four
minutes when this light turns on.
• We recommend you do not operate the vehicle or engine damage will occur. Have the vehicle serviced immediately.
WHAT TO DO IN EMERGENCIES
56

- Anti-Lock Brake (ABS) Light
• This light monitors the Anti-Lock Brake System (ABS).
• If the light is not on during starting, stays on, or turns on while driving, werecommend you drive to the nearest service center and have the vehicle serviced
immediately.
- Electronic Throttle Control (ETC) Light
• This light informs you of a problem with the Electronic Throttle Control (ETC) system.
• If a problem is detected, the light will come on while the engine is running. Cycle theignition when the vehicle has completely stopped and the shift lever is placed in the
PARK position; the light should turn off.
• If the light remains lit with the engine running, your vehicle will usually be drivable; however, see an authorized service center immediately. If the light is flashing when
the engine is running, immediate service is required and you may experience
reduced performance, an elevated/rough idle or engine stall and your vehicle may
require towing.
- Airbag Warning Light
• If the light is not on during starting, stays on, or turns on while driving, have thevehicle serviced by an authorized service center immediately.
Fuel Cap/Loose Gas Cap Message
• If a “gas cap” message (shown as gASCAP) appears, tighten the gas cap until a“clicking” sound is heard.
• Press the odometer reset button to turn the message off.
• If the message continues to appear for more than three days after tightening the gas cap, see your authorized service center.
Oil Change IndicatorMessage
• If an “oil change” message (shown as CHAngE OIL) appears and a single chime sounds, it is time for your next required oil change.
Resetting The Light After Servicing
• Turn the ignition switch to the ON/RUN position (do not start engine).
• Fully depress the accelerator pedal three times within 10 seconds.
• Turn the ignition switch to the OFF/LOCK position.
HOTOIL – Transmission Temperature Warning Message
• The HOTOIL cluster message will appear in the odometer accompanied with a chime to indicate that there is excessive transmission fluid temperature that might
occur with severe usage such as trailer towing.
• It may also occur when operating the vehicle in a high torque converter slip condition, such as 4-wheel-drive operation (e.g., snow plowing, off-road operation).
• If this HOTOIL message turns on, stop the vehicle and run the engine at idle or faster, with the transmission in NEUTRAL until the message turns off.
WHAT TO DO IN EMERGENCIES
57

CAUTION!
Continuous driving with the Transmission Temperature HOTOIL Warning
message illuminated will eventually cause severe transmission damage and
transmission failure.
WARNING!
Continued operation with the Transmission Temperature HOTOIL Warning
message illuminated could cause the fluid to boil over, come into contact with the
hot engine or exhaust components causing a fire that may result in personal
injury.
IF YOUR ENGINE OVERHEATS
• In any of the following situations, you can reduce the potential for overheating bytaking the appropriate action.
• On the highways — slow down.
• In city traffic — while stopped, shift transmission into 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 (A/C) is on, turn it off. The A/C system adds heat to the engine cooling system and turning the A/C off can help remove 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 temperature reading does not return to normal, turn the engine off immediately.
• We recommend that you do not operate the vehicle or engine damage will occur. Have the vehicle serviced immediately.
CAUTION!
Driving with a hot cooling system could damage your vehicle. If the temperature
gauge reads HOT (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 HOT (H), and you hear continuous chimes, turn the engine off
immediately and call for service.
WHAT TO DO IN EMERGENCIES
58