2018 JEEP WRANGLER ECU

WARNING!
more likely to be seriously injured or
killed.
• A loose head restraint thrown forward in
a collision or hard stop could cause
serious injury or death to occupants of
the vehicle. Always securely stow re-
moved head restraints in a location out-
side the occupant compartment.
• ALL the head restraints MUST be rein-
stalled in the vehicle to properly protect
the occupants. Follow the reinstallation
instructions above prior to operating the
vehicle or occupying a seat.
NOTE:
Do not reposition the head restraint 180 de-
grees to the incorrect position in an attempt
to gain additional clearance to the back of the
head.
Rear Head Restraints—4DoorModel
The rear seat is equipped with nonadjustable
outboard head restraints and a removable
center head restraint. To remove the center
head restraint, push the release button, lo-
cated on the base of the head restraint, and
pull upward on the head restraint. To install
the head restraint hold the release button
while pushing downward on the head
restraint.
WARNING!
• Do not drive the vehicle without the rear
seat head restraints installed while pas-
sengers are occupying the rear seat. In a
collision, people riding in this area with-
out the head restraints installed are
more likely to be seriously injured or
killed.
WARNING!
• A loose head restraint thrown forward in
a collision or hard stop could cause se-
rious injury or death to occupants of the
vehicle. Always securely stow removed
head restraints in a location outside the
occupant compartment.
• ALL the head restraints MUST be rein-
stalled in the vehicle to properly protect
the occupants. Follow the reinstallation
instructions above prior to operating the
vehicle or occupying a seat.
NOTE:
Do not reposition the head restraint 180 de-
grees to the incorrect position in an attempt
to gain additional clearance to the back of the
head.
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3. Make sure to slide the plastic sleeves
forward to unlock the Sunrider links.4. Grasp the header and lift the top back.
Make sure the material is folded back as
shown.5. Locate the straps to secure the side bows.
Wrap the straps around the bows as
shown. Repeat on the other side.
6. Reposition the sun visors.
NOTE:
If you are going to be driving faster than
40 mph (64 km/h) with the Sunrider feature
open, it is recommended that you remove the
rear window of the vehicle.
•To close the Sunrider feature, perform the
above steps in the opposite order.
Step 3
Step 4Step 5GETTING TO KNOW YOUR VEHICLE
40

5. Fold back the front section of the top and
gently rest the header on top of the rear
portion of the deck.
6. Secure the top by using the two provided
straps. Each strap will wrap around the
side bow and Velcro to itself; use one strap
on each side of the vehicle.NOTE:
• Failure to fold the fabric rearward will allow
the material to sag and may block the
rearview mirror.
• If you are going to be driving faster than
40 mph (64 km/h) with the Sunrider fea-
ture open, it is recommended that you
remove the rear window of the vehicle.
• To close the Sunrider feature, perform the
above steps in the opposite order.Four-Door Soft Top Down
Follow these simple steps to lower the Four-
Door soft top.
1. Remove the side and back windows.
Step 5
Step 6
Step 1
GETTING TO KNOW YOUR VEHICLE
44

5. Unlatch the header panel latches located
at the top of the windshield.
6. Remove the left-hand panel.
To remove the right panel, follow the steps
above except for step three.
NOTE:
• The left panel must be removed before
removing right panel.• Vehicles equipped with a Freedom Top,
come with a Freedom Top storage bag that
allows you to store your Freedom Top
panels.
For complete information, refer to your Owner's
Manual.
Hard Top Removal
Follow these simple steps to remove the hard
top.
1. Remove both front panels. Refer to “Free-
dom Top Removal” in the previous
section.
2. Open both doors.
3. Remove the two Torx head screws that
secure the hard top at the B-pillar (near
the top of the door) using a #40 Torx head
driver (Four–Door Only).
4. Remove the six Torx head screws that
secure the hard top to the vehicle (along
the interior body side) using a #40 Torx
head driver.
5. Open the swing gate all the way to ensure
clearance of the rear window glass. Lift
the rear window glass.6. Locate and disconnect the wire harness
on the left rear inside corner of the
vehicle.
7. Remove the washer hose (next to the wire
harness) by pinching the grips on hose
connector and pull downward.
8. Close the swing gate.
9. Remove the hard top from the vehicle.
Place the hard top on a soft surface to
prevent damage.
Step 5
Step 6
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Wind Buffeting
Wind buffeting can be described as a
helicopter-type percussion sound. If buffet-
ing occurs with the rear windows open, adjust
the front and rear windows together.
HOOD
Opening The Hood
Release both the hood latches.Raise the hood and locate the safety latch,
located in the middle of the hood opening.
Push the safety latch to the left side of the
vehicle, to open the hood. You may have to
push down slightly on the hood before push-
ing the safety latch. Insert the support rod
into the slot on the hood.
Closing The Hood
To close the hood, remove the support rod
from the hood panel and place it in the
retaining clip. Lower the hood slowly. Secure
both of the hood latches.
WARNING!
Be sure the hood is fully latched before
driving your vehicle. If the hood is not fully
latched, it could open when the vehicle is
in motion and block your vision. Failure to
follow this warning could result in serious
injury or death.
REAR SWING GATE
The rear swing gate can be unlocked by using
the key, Remote Keyless Entry key fob, or by
activating the power door lock switches lo-
cated on the front doors.
To open the swing gate, push the button on
the gate handle.
NOTE:
Close the rear flip-up window before attempt-
ing to close the swing gate (hard top models
only).
Hood Latch Location
Swing Gate Handle
51

GETTING TO KNOW YOUR INSTRUMENT PANEL
INSTRUMENT CLUSTER DISPLAY —
IF EQUIPPED................56
Instrument Cluster Display Location And
Controls.....................56
Instrument Cluster Display Messages . . .57
Gear Shift Indicator (GSI) — If
Equipped....................58
Oil Change Required.............58
WARNING LIGHTS AND MES-
SAGES ....................58
Red Warning Lights..............58
Yellow Warning Lights............61
Yellow Indicator Lights............63
Green Indicator Lights............64
White Indicator Lights............64
Blue Indicator Lights.............64
ONBOARD DIAGNOSTIC SYSTEM —
OBDII ....................64
Onboard Diagnostic System (OBD II)
Cybersecurity.................65
Loose Fuel Filler Cap Message.......65
GETTING TO KNOW YOUR INSTRUMENT PANEL
55

remain on continuously and a chime will
sound. Refer to “Occupant Restraints Sys-
tems” in “Safety” for further information.
— Vehicle Security Warning Light — If
Equipped
This light will flash at a fast rate for approxi-
mately 15 seconds when the vehicle security
alarm is arming, and then will flash slowly
until the vehicle is disarmed.
Yellow Warning Lights
— Anti-Lock Brake (ABS) Warning
Light
This light monitors the Anti-Lock Brake Sys-
tem (ABS). The light will turn on when the
ignition is placed in the ON/RUN or ACC/ON/
RUN position and may stay on for as long as
four seconds.
If the ABS light remains on or turns on while
driving, then the Anti-Lock portion of the
brake system is not functioning and service is
required as soon as possible. However, the
conventional brake system will continue to
operate normally, assuming the Brake Warn-
ing Light is not also on.If the ABS light does not turn on when the
ignition is placed in the ON/RUN or ACC/ON/
RUN position, have the brake system in-
spected by an authorized dealer.
— Electronic Stability Control (ESC)
Active Warning Light — If Equipped
This light will indicate when the Electronic
Stability Control system is Active. The “ESC
Indicator Light” in the instrument cluster will
come on when the ignition is placed in the
ON/RUN or ACC/ON/RUN position, and when
ESC is activated. It should go out with the
engine running. If the “ESC Indicator Light”
comes on continuously with the engine run-
ning, 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), see
your authorized dealer as soon as possible to
have the problem diagnosed and corrected.
• The “ESC Off Indicator Light” and the
“ESC Indicator Light” come on momen-
tarily each time the ignition is placed in the
ON/RUN or ACC/ON/RUN position.• The ESC system will make buzzing or click-
ing sounds when it is active. This is normal;
the sounds will stop when ESC becomes
inactive.
• This light will come on when the vehicle is
in an ESC event.— Electronic Stability Control (ESC) Off
Warning Light — If Equipped
This light indicates the Electronic Stability
Control (ESC) is off.
Each time the ignition is turned to ON/RUN
or ACC/ON/RUN, the ESC system will be on,
even if it was turned off previously.
— Low Fuel Warning Light
When the fuel level reaches approximately
2.8 gal (10.6 L), this light will turn on and a
chime will sound. The light will remain on
until fuel is added.
— Engine Check/Malfunction Indica-
tor Warning Light (MIL)
The Engine Check/Malfunction Indicator
Light (MIL) is a part of an Onboard Diagnostic
System called OBD II that monitors engine
61

If any of these systems require service, the
OBD II system will turn on the Malfunction
Indicator Light (MIL). It will also store diag-
nostic codes and other information to assist
your service technician in making repairs.
Although your vehicle will usually be drivable
and not need towing, see your authorized
dealer for service as soon as possible.
CAUTION!
• Prolonged driving with the MIL on could
cause further damage to the emission
control system. It could also affect fuel
economy and driveability. The vehicle
must be serviced before any emissions
tests can be performed.
• If the MIL is flashing while the vehicle is
running, severe catalytic converter dam-
age and power loss will soon occur. Im-
mediate service is required.
Onboard Diagnostic System (OBD II)
Cybersecurity
Your vehicle is required to have an Onboard
Diagnostic system (OBD II) and a connection
port to allow access to information related tothe performance of your emissions controls.
Authorized service technicians may need to
access this information to assist with the
diagnosis and service of your vehicle and
emissions system.
WARNING!
• ONLY an authorized service technician
should connect equipment to the OBD II
connection port in order to diagnose or
service your vehicle.
• If unauthorized equipment is connected
to the OBD II connection port, such as a
driver-behavior tracking device, it may:
• Be possible that vehicle systems,
including safety related systems,
could be impaired or a loss of ve-
hicle control could occur that may
result in an accident involving seri-
ous injury or death.
• Access, or allow others to access,
information stored in your vehicle
systems, including personal infor-
mation.For further information, refer to “Cybersecu-
rity” in “Multimedia” in your Owner's
Manual.
Loose Fuel Filler Cap Message
After fuel is added, the vehicle diagnostic
system can determine if the fuel filler cap is
possibly loose, improperly installed, or dam-
aged. A “gASCAP” message will be displayed
in the odometer. Tighten the gas cap until a
"clicking" sound is heard. This is an indica-
tion that the gas cap is properly tightened.
Push the odometer reset button to turn the
message off. If the problem persists, the
message will appear the next time the vehicle
is started. This might indicate a damaged
cap. If the problem is detected twice in a row,
the system will turn on the MIL. Resolving the
problem will turn the MIL off.
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