fuel pump JEEP WRANGLER UNLIMITED 2013 Owners Manual

Normal Starting
NOTE: Normal starting of either a cold or a warm
engine is obtained without pumping or pressing the
accelerator pedal.
Turn the ignition switch to the START position and
release when the engine starts. If the engine fails to start
within 10 seconds, turn the ignition switch to the LOCK
position, wait 10 to 15 seconds, then repeat the “Normal
Starting” procedure.
Tip Start Feature – Automatic Transmission Only
Turn the ignition switch to the START position and
release it as soon as the starter engages. The starter motor
will continue to run, but will automatically disengage
itself when the engine is running. If the engine fails to
start, the starter will disengage automatically in 10 sec-
onds. If this occurs, turn the ignition switch to the LOCK
position, wait 10 to 15 seconds, then repeat the “Normal
Starting” procedure. Extreme Cold Weather (Below –20°F Or 29°C)
To ensure reliable starting at these temperatures, use of
an externally powered electric engine block heater (avail-
able from your authorized dealer) is recommended.
If Engine Fails To Start
WARNING!• Never pour fuel or other flammable liquids into
the throttle body air inlet opening in an attempt to
start the vehicle. This could result in a flash fire
causing serious personal injury.
• Do not attempt to push or tow your vehicle to get it
started. Vehicles equipped with an automatic trans-
mission cannot be started this way. Unburned fuel
could enter the catalytic converter and, once the
engine has started, ignite and damage the converter
and vehicle. (Continued)
5 STARTING AND OPERATING 411

Over 40 auto manufacturers worldwide have issued and
endorsed consistent gasoline specifications (the World-
wide Fuel Charter, WWFC) which define fuel properties
necessary to deliver enhanced emissions, performance,
and durability for your vehicle. The manufacturer recom-
mends the use of gasolines that meet the WWFC speci-
fications if they are available.
Reformulated Gasoline
Many areas of the country require the use of cleaner
burning gasoline referred to as “Reformulated Gasoline.”
Reformulated gasolines contain oxygenates and are specifi-
cally blended to reduce vehicle emissions and improve air
quality.
The manufacturer supports the use of reformulated gaso-
lines. Properly blended reformulated gasolines will pro-
vide excellent performance and durability of engine and
fuel system components. Gasoline/Oxygenate Blends
Some fuel suppliers blend unleaded gasoline with oxy-
genates such as Ethanol. Fuels blended with oxygenates
may be used in your vehicle.
CAUTION!DO NOT use gasoline containing Methanol or gaso-
line containing more than 10% Ethanol. Use of these
blends may result in starting and driveability prob-
lems, damage critical fuel system components, cause
emissions to exceed the applicable standard, and/or
cause the “Malfunction Indicator Light” to illumi-
nate. Pump labels should clearly communicate if a
fuel contains greater than 10% Ethanol.
Problems that result from using gasoline containing
Methanol or gasoline containing more than 10% Ethanol
are not the responsibility of the manufacturer and may
not be covered under warranty. 5 STARTING AND OPERATING 507

E-85 Usage In Non-Flex Fuel Vehicles
Non-FFV vehicles are compatible with gasoline contain-
ing 10% ethanol (E10). Gasoline with higher ethanol
content may void the vehicle’s warranty.
If a Non-FFV vehicle is inadvertently fueled with E-85
fuel, the engine will have some or all of these symptoms:
• operate in a lean mode
• OBD II “Malfunction Indicator Light” on
• poor engine performance
• poor cold start and cold drivability
• increased risk for fuel system component corrosion
To fix a Non-FFV vehicle inadvertently fueled once with
E-85 perform the following:
• drain the fuel tank (see your authorized dealer) • change the engine oil and oil filter
• disconnect and reconnect the battery to reset the
engine controller memory
More extensive repairs will be required for prolonged
exposure to E-85 fuel.
MMT In Gasoline
MMT is a manganese-containing metallic additive that is
blended into some gasoline to increase octane. Gasoline
blended with MMT provides no performance advantage
beyond gasoline of the same octane number without
MMT. Gasoline blended with MMT reduces spark plug
life and reduces emissions system performance in some
vehicles. The manufacturer recommends that gasoline
without MMT be used in your vehicle. The MMT content
of gasoline may not be indicated on the gasoline pump,
therefore, you should ask your gasoline retailer whether
the gasoline contains MMT. It is even more important to
look for gasoline without MMT in Canada, because MMT508 STARTING AND OPERATING

WARNING! (Continued)• A fire may result if gasoline is pumped into a
portable container that is inside of a vehicle. You
could be burned. Always place gas containers on
the ground while filling.
NOTE:
• When the fuel nozzle “clicks” or shuts off, the fuel tank
is full.
• Tighten the gas cap about 1/4 turn until you hear one
click. This is an indication that the cap is properly
tightened.
• If the gas cap is not tightened properly, the MIL will
come on. Be sure the gas cap is tightened every time
the vehicle is refueled. Loose Fuel Filler Cap Message
After fuel has been added, the vehicle diagnostic system
can determine if the fuel filler cap is possibly loose,
improperly installed, or damaged. If the system detects a
malfunction, the “gASCAP” message will display in the
odometer display. Tighten the gas cap until a  clicking 
sound is heard. This is an indication that the gas cap is
properly tightened. Press 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.512 STARTING AND OPERATING

Cavity Car-
tridge
Fuse Mini
Fuse Description
J1 — —
J2 30 Amp
Pink Transfer Case
Module
J3 — —
J4 25 Amp
Natural Driver Door Node
J5 25 Amp
Natural Passenger Door
Node
J6 40 Amp
Green Anti-Lock Brake
System (ABS)
Pump/Stability
Control System Cavity Car-
tridge
Fuse Mini
Fuse Description
J7 30 Amp
Pink Anti-Lock Brake
System (ABS)
Valve/Stability
Control System
J8 — —
J9 40 Amp
Green PZEV Sec Motor/
Flex Fuel
J10 30 Amp
Pink Headlamp Wash
Relay/Manifold
Tuning Valve
J11 30 Amp
Pink Sway Bar
J12 30 Amp
Pink Rear Blower Motor/
Radiator Fan
7 MAINTAINING YOUR VEHICLE 599

Cavity Car-
tridge
Fuse Mini
Fuse Description
M18 15 Amp
Blue Right Tail/Park/
Run Lamp
M19 25 Amp
Natural Auto Shut Down
(ASD #1 and #2)
M20 15 Amp
Blue Cabin Compartment
Node Interior Light,
Switch Bank
M21 20 Amp
Yellow Auto Shut Down
(ASD #3)
M22 10 Amp
Red Right Horn
(HI/LOW)
M23 10 Amp
Red Left Horn
(HI/LOW) Cavity Car-
tridge
Fuse Mini
Fuse Description
M24 25 Amp
Natural Rear Wiper
M25 20 Amp
Yellow Fuel Pump, Diesel
Lift Pump –
Export Only
M26 10 Amp
Red Power Window
Switch, Driver
Window Switch
M27 10 Amp
Red Ignition Switch
Feed, Wireless
Module
M28 10 Amp
Red Powertrain Control
Module
7 MAINTAINING YOUR VEHICLE 603

Cavity Car-
tridge
Fuse Mini
Fuse Description
M29 10 Amp
Red Powertrain
M30 15 Amp
Blue Wiper Motor Frt,
J1962 Diagnostic Feed
M31 20 Amp
Yellow Backup Lamps
M32 10 Amp
Red Airbag Controller,
TT EUROPE
M33 10 Amp
Red Powertrain
Controller
M34 10 Amp
Red Park Assist, Climate
Control System,
Headlamp Wash,
Compass Cavity Car-
tridge
Fuse Mini
Fuse Description
M35 10 Amp
Red Heated Mirrors
M36 20 Amp
Yellow Power Outlet
M37 10 Amp
Red Anti-Lock Brake
System, Electronic
Stability Control,
Stop Lamp Switch,
Fuel Pump Relay
M38 25 Amp
Natural Lock/Unlock
Motors604 MAINTAINING YOUR VEHICLE