2019 NISSAN TITAN fuel filter

13. Lubricate the inner seal on the fuel filterelement with petroleum jelly or white
lithium grease.
14. Install the fuel filter element onto the standpipe in the fuel filter housing.
CAUTION
∙ Do not install the fuel filter elementinto the fuel filter lid first or the fuel
filter element may be damaged dur-
ing installation into the housing. ∙ Be sure the fuel filter element is
seated in the housing by pushing
downward on the top of the element.
If the fuel filter element is not fully
seated in the housing af ter installa-
tion, the engine can fail to start
and/or set low fuel pressure Diagno-
sis Trouble Codes (DTCs).
NOTE:
It is possible Diagnosis Trouble Codes
(DTCs) may be stored af ter fuel filter ele-
ment replacement due to air introduced
in the system. Make sure to run the en-
gine until air is purged. If the engine fails
to start and/or set low fuel pressure
warning, illuminate it is recommended
that you visit a NISSAN dealer or other
qualified technician.
15. Install and tighten the cover.
Cover tightening torque: 18 f t-lb (25 N·m)
16. Install the air cleaner lid and air inlet connection air ducts.
17. Connect the lef t and right side batter- ies. 18. Prime the fuel system. For additional
information, refer to “Fuel system prim-
ing” in this section.
LDI2894

DRAINING WATER
WARNING
To avoid the risk of personal injury or
fire, drain diesel fuel into an approved
container and safely dispose of in ac-
cordance with local environmental
regulations.
CAUTION
Continuing vehicle operation without
properly draining could cause serious
damage to the engine.1. Shut the engine off.
2. Place a large drain pan under the drain
valve
A.
3. Turn the drain valve counterclockwise
1/4 turn to open.
4. Drain the filter sump until clear fuel is visible. If draining the stage 1 fuel filter
housing, drain until fuel reduces to a
trickle.
5. Turn the drain valve clockwise1/4 turn
to close.
FUEL SYSTEM PRIMING
WARNING
The fuel pump, high-pressure fuel lines,
and fuel rail contain very high-pressure
fuel. To reduce the possibility of per-
sonal injury, never loosen any fittings
while the engine is running. NOTE:
∙ It is not necessary to vent air from the
high-pressure fuel system before
starting the engine.
∙ Upon ignition on the electric lif t pump
will run until the fuel system is primed
or 90 seconds, whichever comes first.
Af ter a filter change or running the fuel tank
dry, complete the following: 1. Key ON vehicle for 90 seconds to prime the fuel system. Af ter 90 seconds, crank
the engine for a maximum of 30 sec-
onds or until the engine fires. If it does
not fire, verif y the following.
– Confirm fuel level is not empty.
– Water in fuel drain valve is closed.
– Stage 1 filter housing shell is fully seated on module and stage 2 cap is
properly seated on module.
– Stage 1 shell O-ring and stage 2 cap O-ring are properly installed and not
damaged.
LDI2898

– Stage 1 fuel filter element1“No
Filter/No Run” pin
Ais not dam-
aged. – Stage 2 fuel filter element2sealB
(at bottom of element) is not dam-
aged (seal can be damaged if ele-
ment is installed incorrectly).
– Then repeat the step above.
2. When the engine does start, it may op- erate erratically and with increased
noise levels for a few minutes. This is a
normal condition as air is being re-
moved from the system.
CAUTION
Repeated dry priming may damage the
filter assembly and result in a no-start.
NOTE:
It is possible for a warning or indicator
light to illuminate due to air entering the
fuel system. If this happens, it is recom-
mended that you visit a NISSAN dealer
for service.
LDI3410LDI3411

1 Introduction
General information............................. 1-2
Diesel engine operation ...................... 1-2
Engine break-in recommendations ........... 1-2
Diesel fuel system ............................ 1-2
Engine protection mode .......................1-3 Lubrication system
............................1-3
Glow plugs ....................................1-3
Diesel Particulate Filter (DPF) System ......... 1-4
Selective catalytic reduction system .......... 1-4
Nissan customer care program ................. 1-5

Preventive maintenance is the easiest and
least expensive type of maintenance. Keep
records of regularly scheduled mainte-
nance and follow the maintenance sched-
ule recommendations outlined in the Titan
Owner’s Manual.
Use the correct fuel, lubricating oil, and
coolant in your engine. Blending engine oil
with fuel is prohibited for engines with an
af tertreatment system. For additional in-
formation, refer to the “Capacities and
specifications” section of this manual.
A NISSAN dealership knows your vehicle.
When you require any service or have any
questions, they will be glad to assist you
with the extensive resources available to
them.
DIESEL ENGINE OPERATION
The operation of the diesel engine in your
new vehicle varies from the operation of
traditional gasoline engines found in other
vehicles. Reading this supplement will fa-
miliarize you and other operators of the
vehicle with the unique maintenance and
operating procedures that will prolong the
life of the diesel engine and related sys-
tems.
ENGINE BREAK-IN
RECOMMENDATIONS
∙ Warm up the engine before operating itunder load
∙ Do not operate the engine at idle for extended periods
∙ Prevent engine lugging by selecting the appropriate transmission gear
∙ Monitor the vehicle oil pressure and temperature gauges
∙ Check fluid levels frequently (Oil & Cool- ant)
∙ Vary the throttle position at highway speeds when carrying weight or towing
NOTE:
Extended light or no load operation will
extend the time before the engine
reaches its full efficiency. If the engine is
operated in this manner, reduced fuel
economy and power may be observed.
The aforementioned procedure should be
observed for the first 6,000 miles. The en-
gine run-in is improved by operating the
vehicle under load.
DIESEL FUEL SYSTEM
The diesel engine fuel system is a pressur-
ized two-stage filtration system and con-
sists of: ∙ A frame-mounted primary (stage 1) fuel filter containing water/fuel separator,
electric fuel pump, and water in fuel
drain valve
∙ An engine-mounted secondary (stage 2) fuel filter
∙ A fuel injector for each cylinder (8 total)
∙ A high-pressure fuel pump
∙ A high-pressure fuel rail for each cylin- der bank (2 total)
∙ High-pressure fuel lines from the high- pressure fuel pump to the right bank
fuel rail, right bank fuel rail to the lef t
bank fuel rail, and fuel rails to fuel injec-
tors.
GENERAL INFORMATION
1-2Introduction

The stage 1 fuel filter separates water and
filters impurities from the fuel. The stage 2
fuel filter filters finer impurities from the
diesel fuel. The stage 1 and stage 2 fuel
filters should be changed at the recom-
mended service interval or when indicated
by the information display. For additional
information, refer to “Maintenance and
schedules” and “Instruments and controls”
sections of the Titan Owner’s Manual.
The water/fuel separator should be
drained when indicated by illumination of
the water in fuel warning light.
NOTE:
Proper fuel filter maintenance and
prompt water draining when the water
in the fuel filter warning light illuminates
is essential to prevent damage to fuel
injection system components. Ignoring
the water in fuel warning light can cause
your vehicle to go into a reduced power
mode and has the potential for fuel sys-
tem damage.ENGINE PROTECTION MODE
The diesel engine in this vehicle is equipped
with electronically controlled fuel and
emission systems. Both systems monitor
engine temperatures and pressures, and
then modif y engine operation accordingly.
It is normal for the diesel engine to operate
under these modified conditions for short
durations of time. If the engine operates
under the modified conditions for ex-
tended periods of time, and the service en-
gine soon light is illuminated, have the sys-
tem checked. It is recommended that you
visit a NISSAN dealer for this service as
soon as possible.
LUBRICATION SYSTEM
It is important to change the engine oil at
the recommended service intervals to
maintain oil viscosity. Extending the oil and
filter change interval beyond the recom-
mended interval can negatively affect en-
gine performance, fuel economy and en-
gine life. For additional information, refer to
the “Do-it-yourself ” section of this manual.
GLOW PLUGS
The diesel engine glow plug system con-
sists of:∙ Eight Glow Plugs (one per cylinder)
∙ Glow Plug Control Module - Uses input from the Engine Coolant Temperature
Sensor
The glow plugs are energized momentarily
when the ignition is first turned on. The
length of time that the glow plugs are en-
ergized varies depending on engine and
environmental conditions. The required
time for the glow plugs to be energized
decreases as coolant temperature in-
creases. For additional information, refer to
the “Starting and stopping the engine” sec-
tion of this manual.
Introduction1-3

WARNINGS LIGHTS, INDICATOR
LIGHTS, METERS AND GAUGES
These lights, meters and gauges are spe-
cific to the diesel engine.1. Low Diesel Exhaust Fluid (DEF) warning
light
2. Diesel Particulate Filter (DPF) warning light
3. Vehicle information display 4. Water in Fuel warning light
5. Malfunction warning light (red)
LIC3469
METERS AND GAUGES
2-2Instrument Panel

Low Diesel Exhaust Fluid (DEF)
warning light
When this warning light illuminates, the
DEF fluid needs to be topped off.
For additional information, refer to the “Fuel
and refueling” section of this manual.
Diesel Particulate Filter (DPF)
warning light
When the warning light illuminates, it indi-
cates that particulate matter is accumu-
lated to the specified amount of the limit in
the filter and the filter needs to regenerate.
For additional information, refer to “Diesel
Particulate Filter (DPF)” in the “Maintenance”
section of this manual.
CAUTION
If you continue driving with the DPF
warning light on without performing
the filter regeneration, this will lead to
particle matter overload in the filter. If
this happens, the Malfunction Indicator
Light (MIL) will turn on to indicate the
necessity that a NISSAN or qualified
dealer performs the service regenera-
tion. The performance of the engine
might be limited to protect the DPF
system.
Vehicle information display
The vehicle information display shows vari-
ous meters and gauges that pertain to the
diesel engine. The information that can be
found within the vehicle information dis-
play is as follows:
Exhaust temperature gauge
The exhaust temperature gauge is part of
the Auxiliary Gauges in the vehicle informa-
tion display.
Turbo meter
The turbo meter shows the amount of en-
gine boost.Diesel Exhaust Fluid (DEF) LEVEL
This gauge indicates the level of DEF in the
diesel system.
The DEF LEVEL information screen can be
turned on or off in the vehicle information
display. For additional information, refer to
“How to use the vehicle information dis-
play” in the “Vehicle information display”
section of the Titan Owner’s Manual.
Water in Fuel warning light
If this light illuminates, pull off of the road in
a safe area, stop the engine and immedi-
ately drain the water from the fuel sedi-
ment filter. For additional information, refer
to “Draining water” in the “Do-it-yourself ”
section of this manual.
Malfunction warning light (red)
If the warning light illuminates this indi-
cates either coolant temperature is above
a critical threshold or the exhaust tem-
peratures are above a critical threshold.
When illuminated this lamp indicates the
need to stop the engine as soon as it can
be safely done. The engine must remain
shut down until the engine can be repaired.
Instrument Panel2-3