2015 JEEP GRAND CHEROKEE Diesel Supplement Manual

WARNING!
The air induction system (air cleaner, hoses, etc.)
provides a measure of protection. Do not remove the
air induction system (air cleaner, hoses, etc.) unless
such removal is necessary for repair or maintenance.
Make sure that no one is near the engine compart-
ment before starting the vehicle with the air induc-
tion system (air cleaner, hoses, etc.) removed. Failure
to do so can result in serious personal injury.
CAUTION!
Many aftermarket performance air filter elements do
not adequately filter the air entering the engine. Use
of such filters can severely damage your engine.
Engine Air Cleaner Filter Selection
The quality of replacement engine air cleaner filters
varies considerably. Only high quality filters should be
used to assure most efficient service. MOPAR® engine air
cleaner filters are a high quality filter and are recom-
mended.
Diesel Engine Air Cleaner Filter Inspection and
Replacement
Inspect engine air cleaner filter for dirt and or debris, if
you find evidence of either dirt or debris you should
change your air cleaner filter.
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MAINTAINING YOUR VEHICLE 79

Engine Air Cleaner Filter Removal
1. Release the spring clips from the air cleaner cover.2. Lift the air cleaner cover to access the air cleaner filter.
Air Cleaner Filter Cover
1 — Spring Clips
2 — Air Cleaner Filter Cover
Open Air Cleaner Filter Assembly
1 — Air Cleaner Filter
2 — Air Cleaner Cover 80 MAINTAINING YOUR VEHICLE

3. Remove the air cleaner filter element from the housing
assembly.Engine Air Cleaner Filter Installation
NOTE:Inspect and clean the housing if dirt or debris is
present before replacing the air filter element.
1. Install the air cleaner filter element into the housing
assembly with the air cleaner filter inspection surface
facing downward.
2. Install the air cleaner cover onto the housing assembly
locating tabs.
3. Latch the spring clips and lock the air cleaner cover to
the housing assembly.
Draining Fuel/Water Separator Filter
The fuel filter/water separator housing is located on the
left side of the vehicle in front of the fuel tank. The best
access to this water drain valve is from under the vehicle.Air Cleaner Filter
1 — Air Cleaner Filter Inspection Surface
2 — Air Cleaner Filter
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MAINTAINING YOUR VEHICLE 81

CAUTION!
•Do not drain the fuel/water separator filters when
the engine is running.
•Diesel fuel will damage blacktop paving surfaces.
Drain the filters into an appropriate container.
If water is detected in the water separator while the
engine is running, or while the ignition switch is in the
ON position, the “Water In Fuel Indicator Light” will
illuminate and an audible chime will be heard. At this
point you should stop the engine and drain the water
from the filter housing.
1 — Fuel Filter Access
2 — Water in Fuel Drain
Fuel Filter Assembly
82 MAINTAINING YOUR VEHICLE

CAUTION!
If the “Water In Fuel Indicator Light” remains on, DO
NOT START the engine before you drain water from
the fuel filters to avoid engine damage.
If the “Water In Fuel Indicator Light” comes on and a
single chime are heard while you are driving, or with the
ignition in the ON position, there may be a problem with
your water separator wiring or sensor. See your autho-
rized dealer for service.
Upon proper draining of the water from fuel filter
assembly, the “Water In Fuel Indicator Light” will remain
illuminated for approximately 10 seconds. If the water
was drained while the engine was running, the “Water In
Fuel Indicator Light” may remain on for approximately
three minutes.NOTE:Care should be taken in disposing of used fluids
from your vehicle. Used fluids, indiscriminately dis-
carded, can present a problem to the environment. Con-
tact an authorized dealer, service station, or government
agency for advice on recycling programs and for where
used fluids and filters can be properly disposed of in
your area.
Drain the fuel/water separator filters when the “Water In
Fuel Indicator Light” is ON. Within 10 minutes of vehicle
shutdown, turn the filter drain valve (located on the
bottom of the filter housing) counterclockwise to drain
fuel/water, then turn the ignition switch to the ON
position, and allow any accumulated water to drain.
Leave the drain valve open until all water and contami-
nants have been removed. When clean fuel is visible,
close the drain valve by turning it clockwise, and turn the
ignition switch to OFF.
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MAINTAINING YOUR VEHICLE 83

If more than two ounces or 60 milliliters of fuel have been
drained, follow the directions for “Priming If The Engine
Has Run Out Of Fuel.”
Underbody Mounted Fuel Filter Replacement
NOTE:Using a fuel filter that does not meet the manu-
facturer’s filtration and water separating requirements
can severely impact fuel system life and reliability.
CAUTION!
•Diesel fuel will damage blacktop paving surfaces.
Drain the filter into an appropriate container.
•Do not prefill the fuel filter when installing a new
fuel filter. There is a possibility debris could be
introduced into the fuel filter during this action. It
is best to install the filter dry and allow the in-tank
lift pump to prime the fuel system.
1 — Fuel Filter Access
2 — Water in Fuel Drain
1. Ensure engine is turned off.
2. Place drain pan under the fuel filter assembly.
Fuel Filter Assembly
84 MAINTAINING YOUR VEHICLE

3. Open the water drain valve, and let any accumulated
water drain.
4. Close the water drain valve.
5. Remove using a socket. Rotate counterclockwise for
removal.
6. Remove the used filter cartridge from the housing and
dispose of according to your local regulations.
7. Wipe clean the sealing surfaces of the lid and housing.
8. Lubricate o-ring on new filter with clean engine oil.
9. Repeat steps 5 through 8 to service second filter in fuel
filter assembly.Priming If The Engine Has Run Out Of Fuel
WARNING!
Do not open the high pressure fuel system with the
engine running. Engine operation causes high fuel
pressure. High pressure fuel spray can cause serious
injury or death.
1. Add a substantial amount of fuel to the tank, approxi-
mately 2 to 5 gal (8L to 19L).
2. Press ignition switch twice without your foot on brake
to put vehicle in Run position. This will activate the in
tank fuel pump for approximately 30 seconds. Repeat
this process twice.
3. Start the engine using the “Normal Starting” proce-
dure. Refer to “Starting Procedures” in “Starting and
Operating” for further information.
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MAINTAINING YOUR VEHICLE 85

CAUTION!
The starter motor will engage for approximately 30
seconds at a time. Allow two minutes between crank-
ing intervals.
NOTE:The engine may run rough until the air is forced
from all the fuel lines.
WARNING!
Do not use alcohol or gasoline as a fuel blending
agent. They can be unstable under certain conditions
and be hazardous or explosive when mixed with
diesel fuel.
CAUTION!
Due to lack of lubricants in alcohol or gasoline, the
use of these fuels can cause damage to the fuel
system.
NOTE:
•We recommend you use a blend of up to 5% biodiesel,
that meets ASTM specification D-975 with your diesel
engine. Use of biodiesel mixture in excess of 20% can
negatively impact the fuel filter’s ability to separate
water from the fuel, resulting in high pressure fuel
system corrosion or damage.
•In addition, commercially available fuel additives are
not necessary for the proper operation of your diesel
engine.
86 MAINTAINING YOUR VEHICLE