ignition JEEP WRANGLER UNLIMITED 2013 Manual Online

If the ignition switch is cycled, this sequence will repeat,
providing the system fault still exists. If the system fault
no longer exists, the “Tire Pressure Monitoring Telltale
Light” will no longer flash, the  SERVICE TPM SYSTEM 
message will not be present, and a pressure value will be
displayed instead of dashes. A system fault can occur by
any of the following:
1. Jamming due to electronic devices or driving next to
facilities emitting the same Radio Frequencies as the
TPM sensors.
2. Installing some form of aftermarket window tinting
that affects radio wave signals.
3. Lots of snow or ice around the wheels or wheel
housings.
4. Using tire chains on the vehicle.
5. Using wheels/tires not equipped with TPM sensors. The EVIC will also display a  SERVICE TPM SYSTEM 
message for a minimum of five seconds when a system
fault is detected possibly related to an incorrect sensor
location fault. In this case, the  SERVICE TPM SYSTEM 
message is then followed by a graphic display, with
pressure values still shown. This indicates the pressure
values are still being received from the TPM Sensors but
they may not be located in the correct vehicle position.
However, the system still needs to be serviced as long as
the  SERVICE TPM SYSTEM  message exists.
NOTE:
•
If your vehicle is equipped with a matching full-size
spare wheel and tire assembly, it has a tire pressure
monitoring sensor, and can be monitored by the Tire
Pressure Monitoring System (TPMS). In the event that
the matching full-size spare tire is swapped with a low
pressure road tire, the next ignition switch cycle will still
show the “Tire Pressure Monitoring Telltale Light” to be
ON, a chime to sound, a “LOW TIRE PRESSURE”504 STARTING AND OPERATING

message to appear in the EVIC, and the graphic display
will still show the low tire pressure value “flashing.”
Driving the vehicle for up to 20 minutes above 15 mph
(24 km/h) will turn OFF the “Tire Pressure Monitoring
Telltale Light” as long as none of road tires are below the
low pressure warning threshold.
• If your vehicle is not equipped with a matching
full-size spare wheel and tire assembly, it does not
have a tire pressure monitoring sensor in the spare tire.
The TPMS will not be able to monitor the tire pressure.
If you install the spare tire in place of a road tire that
has a pressure below the low-pressure warning limit,
upon the next ignition switch cycle, the “Tire Pressure
Monitoring Telltale Light” will remain ON, a chime
will sound, and the EVIC will still display a “flashing”
pressure value in the graphic display. After driving the
vehicle for up to 20 minutes above 15 mph (24 km/h),
the “Tire Pressure Monitoring Telltale Light” will flash
on and off for 75 seconds and then remain on solid. In addition, the EVIC will display a “SERVICE TPM
SYSTEM  message for a minimum of five seconds and
then display dashes (- -) in place of the pressure value.
For each subsequent ignition switch cycle, a chime will
sound, the “Tire Pressure Monitoring Telltale Light”
will flash on and off for 75 seconds and then remain on
solid, and the EVIC will display a  SERVICE TPM
SYSTEM  message for a minimum of five seconds and
then display dashes (- -) in place of the pressure value.
Once you repair or replace the original road tire, and
reinstall it on the vehicle in place of the spare tire, the
TPMS will update automatically.
In addition, the “Tire Pressure Monitoring Telltale Light”
will turn OFF and the graphic in the EVIC will display a
new pressure value instead of dashes (- -), as long as no
tire pressure is below the low-pressure warning limit in
any of the four active road tires. The vehicle may need to
be driven for up to 20 minutes above 15 mph (24 km/h)
in order for the TPMS to receive this information. 5 STARTING AND OPERATING 505

can be used at levels higher than those allowed in the
United States. MMT is prohibited in Federal and Califor-
nia reformulated gasoline.
Materials Added To Fuel
All gasoline sold in the United States is required to contain
effective detergent additives. Use of additional detergents
or other additives is not needed under normal conditions
and they would result in additional cost. Therefore, you
should not have to add anything to the fuel.
Fuel System Cautions
CAUTION!Follow these guidelines to maintain your vehicle’s
performance:
• The use of leaded gas is prohibited by Federal law.
Using leaded gasoline can impair engine perfor-
mance and damage the emissions control system. (Continued) CAUTION! (Continued)• An out-of-tune engine or certain fuel or ignition
malfunctions can cause the catalytic converter to
overheat. If you notice a pungent burning odor or
some light smoke, your engine may be out of tune or
malfunctioning and may require immediate service.
Contact your authorized dealer for service assistance.
• The use of fuel additives, which are now being sold
as octane enhancers, is not recommended. Most of
these products contain high concentrations of metha-
nol. Fuel system damage or vehicle performance
problems resulting from the use of such fuels or
additives is not the responsibility of the manufac-
turer.
NOTE: Intentional tampering with the emissions control
system can result in civil penalties being assessed against
you.
5 STARTING AND OPERATING 509

Shifting Out of NEUTRAL (N)
Use the following procedure to prepare your vehicle for
normal usage.
1. Bring the vehicle to a complete stop, leaving it con-
nected to the tow vehicle.
2. Firmly apply the parking brake.
3. Turn the ignition switch to the LOCK/OFF position.
4. Turn the ignition switch to the ON/RUN position, but
do not start the engine.
5. Press and hold the brake pedal.
6. Shift the transmission into NEUTRAL.
7. Shift the transfer case lever to the desired position. NOTE: When shifting out of transfer case NEUTRAL
(N), turning the engine OFF may be required to avoid
gear clash.
8. Shift the automatic transmission into PARK, or place
manual transmission in Neutral.
9. Release the brake pedal.
10. Disconnect vehicle from the tow vehicle.
11. Start the engine.
12. Press and hold the brake pedal.
13. Release the parking brake.
14. Shift the transmission into gear, release the brake
pedal (and clutch pedal on manual transmissions),
and check that the vehicle operates normally.536 STARTING AND OPERATING

WHAT TO DO IN EMERGENCIESCONTENTS  HAZARD WARNING FLASHERS .......... .538
 IF YOUR ENGINE OVERHEATS ........... .538
 JACKING AND TIRE CHANGING ......... .540
▫ Jack Location ....................... .541
▫ Spare Tire Stowage ................... .542
▫ Preparations For Jacking ............... .542
▫ Jacking Instructions .................. .543
▫ Road Tire Installation .................. .547  JUMP-STARTING PROCEDURES ........... .548
▫ Preparations For Jump-Start ............. .549
▫ Jump-Starting Procedure ............... .550
 FREEING A STUCK VEHICLE ............. .552
 EMERGENCY TOW HOOKS — IF EQUIPPED . .554
 SHIFT LEVER OVERRIDE ............... .554
 TOWING A DISABLED VEHICLE .......... .556
▫ Without The Ignition Key ............... .557
▫ Four–Wheel Drive Models .............. .558
6

HAZARD WARNING FLASHERS
The Hazard Warning flasher switch is located on the
instrument panel below the climate controls.
Press the switch to turn on the Hazard Warning
flasher. When the switch is activated, all direc-
tional turn signals will flash on and off to warn oncoming
traffic of an emergency. Press the switch a second time to
turn off the Hazard Warning flashers.
This is an emergency warning system and it should not
be used when the vehicle is in motion. Use it when your
vehicle is disabled and it is creating a safety hazard for
other motorists. When you must leave the vehicle to seek assistance, the
Hazard Warning flashers will continue to operate even
though the ignition is placed in the OFF position.
NOTE: With extended use the Hazard Warning flashers
may wear down your battery.
IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate action.
• On the highways — slow down.
• In city traffic — while stopped, shift transmission into
NEUTRAL, but do not increase engine idle speed.538 WHAT TO DO IN EMERGENCIES

Spare Tire Stowage
To remove the spare tire from the carrier, remove the tire
cover, if equipped, and remove the lug nuts with the lug
wrench turning them counterclockwise.
NOTE: If you have added aftermarket accessories to the
spare tire mounted carrier, it cannot exceed a gross weight
of 50 lbs (23 kg) including the weight of the spare tire.
Preparations For Jacking
1. Park on a firm, level surface. Avoid ice or slippery areas.
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 being hit when operating the jack
or changing the wheel. 2. Turn on the Hazard Warning flasher.
3. Set the parking brake.
4. Shift the automatic transmission into PARK, or a
manual transmission into REVERSE.
5. Turn the ignition to LOCK.
Block both the front and rear of the
wheel diagonally opposite of the jack-
ing position. For example, if changing
the right front tire, block the left rear
wheel.
NOTE: Passengers should not remain in the vehicle
when the vehicle is being jacked.542 WHAT TO DO IN EMERGENCIES

Preparations For Jump-Start
The battery in your vehicle is located in the right rear of
the engine compartment, behind the Power Distribution
Center.
WARNING!• Take care to avoid the radiator cooling fan when-
ever the hood is raised. It can start anytime the
ignition switch is ON. You can be injured by
moving fan blades.
• Remove any metal jewelry such as watch bands or
bracelets that might make an inadvertent electrical
contact. You could be seriously injured.
• Batteries contain sulfuric acid that can burn your
skin or eyes and generate hydrogen gas which is
flammable and explosive. Keep open flames or
sparks away from the battery.
Positive Battery Post
6 WHAT TO DO IN EMERGENCIES 549

1. Set the parking brake, shift the automatic transmission
into PARK (manual transmission in NEUTRAL) and
turn the ignition to LOCK.
2. Turn off the heater, radio, and all unnecessary electri-
cal accessories.
3. If using another vehicle to jump-start the battery, park
the vehicle within the jumper cables reach, set the
parking brake and make sure the ignition is OFF.
WARNING!Do not allow vehicles to touch each other as this
could establish a ground connection and personal
injury could result. Jump-Starting Procedure
WARNING!Failure to follow this procedure could result in per-
sonal injury or property damage due to battery ex-
plosion.
CAUTION!Failure to follow these procedures could result in
damage to the charging system of the booster vehicle
or the discharged vehicle.
1. Connect the positive (+) end of the jumper cable to the
positive (+) post of the discharged vehicle.
2. Connect the opposite end of the positive (+) jumper
cable to the positive (+) post of the booster battery.550 WHAT TO DO IN EMERGENCIES

3. Using a small screwdriver or similar tool, remove the
shift lever override access cover (located to the right of
the shift lever).
4. Turn the ignition to the ACC or ON/RUN position,
but do not start the engine. 5. Press and maintain firm pressure on the brake pedal.
6. Insert the screwdriver or similar tool into the access
port, and push and hold the override release lever
down.
7. Move the shift lever to the NEUTRAL position.
8. The vehicle may then be started in NEUTRAL.
9. Reinstall the shift lever override access cover.
Shift Lever Override Access Cover
6 WHAT TO DO IN EMERGENCIES 555