2019 NISSAN TITAN fuel filter

CAUTION
Your vehicle may require more frequent
maintenance if it operates on biodiesel
blends between 6% and 10% (B6 and
B10). To avoid damage to your vehicle,
the oil, oil filter, and fuel filter will need
to be replaced af ter a shorter time in-
terval than if your vehicle was operat-
ing on pure petroleum-based diesel.
For additional information, refer to the
“Maintenance and schedules” section in
the Titan Owner’s Manual.
FUEL FILTER REPLACEMENT (stage
1)
NOTE:∙ It is possible the “Low Fuel Pressure:
See Owner’s Manual” message will
display on the vehicle information
display af ter fuel filter replacement
due to air being introduced into the
fuel system. ∙
If the “Low Fuel Pressure: See Owner’s
Manual” message is displayed on the
vehicle information display with the
engine running, complete a full key
cycle (turn the vehicle off and wait
2 minutes) and restart the vehicle. If
the message is still displayed or the
Malfunction Indicator Light is illumi-
nated af ter a full key cycle , it is rec-
ommended that you visit a NISSAN
dealer for service.
WARNING
∙ The fuel system (fuel pump, high pres- sure fuel lines, fuel rail, injectors) con-
tain very high pressure fuel. To avoid
the risk of personal injury or fire;
– Do not loosen any fittings while the engine is running.
– Wait at least 10 minutes af ter shut- ting down the engine before loos-
ening any fittings in the high-
pressure fuel system to allow
pressure to decrease to a lower
level.
– Wear appropriate eye protection and protective equipment as high-
pressure fuel spray can penetrate
the skin.
Fuel filter (stage 1) location
LDI2921
FUEL FILTER (CUMMINS 5.0L)

– Never smoke or allow sparks orflames (such as pilot lights, electri-
cal switches, or welding equip-
ment) in the work area. Never allow
diesel fuel to spill onto a hot ex-
haust manifold which can cause a
fire.
∙ Depending on the circumstance, die- sel fuel is flammable. When inspect-
ing or performing service or repairs
on the fuel system, to reduce the pos-
sibility of fire and resulting severe
personal injury, death, or property
damage, never smoke or allow sparks
or flames (such as pilot lights, electri-
cal switches, or welding equipment) in
the work area.
∙ Do not vent the fuel system on a hot engine; this can cause fuel to spill
onto a hot exhaust manifold, which
can cause a fire.
∙ Batteries can emit explosive gases. To reduce the possibility of personal in-
jury, always ventilate the compart-
ment before servicing the batteries.
To reduce the possibility of arcing, re-
move the negative (-) battery cable
first and attach the negative (-) bat-
tery cable last. ∙ When using a steam cleaner, wear
safety glasses or a face shield, as well
as protective clothing. Hot steam can
cause serious personal injury.
∙ Wear appropriate eye and face pro- tection when using compressed air.
Flying debris and dirt can cause per-
sonal injury.
CAUTION
Clean all around the filter area before
disassembly. Dirt or contaminants can
damage the fuel system.
REMOVAL
NOTE:
Leaving the housing un-installed from
the module for extended periods of time
could cause the fuel tank to drain
through the stage 1 fuel filter module.
1. Push the ignition switch to the OFF po- sition and wait 2 minutes before dis-
connecting the batteries.
2. Disconnect the lef t and right side bat- teries.
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3. Clean the area around the stage 1 fuelfilter.
4. Drain the fuel filter housing. For addi- tional information, refer to “Draining
water” in this section.
5. Close the water-in-fuel drain.
6. Disconnect the wiring harness
Afrom
the water-in-fuel sensor.
7. Remove the fuel filter housing (Stage 1) protector
Bfrom the moduleC.
NOTE:
- It may be necessary to use a screw-
driver in the slots provided to remove the
fuel filter element from the housing.
- If fuel filter element does not release
with housing remove the element by
twisting and pulling directly away from
module simultaneously. Do not bend or
exert a side force as that may damage
the filter assembly and result in no-start.8. Remove the fuel filter element
Dby
lif ting it out of the fuel filter housing.
9. Remove and discard the sealing o-ring
Efrom the fuel filter housing.
INSPECTION
Inspect the fuel filter housing and module
for cracks, passage blockages, and other
damage. If damage is found, replacement
is mandatory.
It is recommended that you visit a NISSAN
dealer for this service.
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INSTALLATION
CAUTION
Do not pre-fill the fuel filter with fuel.
Pre-filling the filter can result in debris
entering the fuel system and damaging
fuel system components.10. Inspect the fuel filter element
1for the
No Filter No Run (NFNR) pin
Hand re-
place fuel filter element if pin is dam-
aged or missing.
NOTE:
A broken/sheared NFNR pin can cause
the pump to operate without supplying
fuel pressure.
11. Lubricate the inner seal of the fuel filter element with petroleum jelly or white
lithium grease. 12. Install a new o-ring on the housing. Lu-
bricate the o-ring with petroleum jelly
or white lithium grease.
NOTE:
If you are using a new fuel filter housing
that has not had fuel in it, lubricate the lip
seal at the bottom of the fuel filter ele-
ment with petroleum jelly or white
lithium grease before placing it into the
housing.
13. Install the fuel filter element into the fuel filter housing and make sure the four
tabs
Fare properly seated into the
four slots
G.
14. Install the fuel filter housing on the module.
Fuel filter housing tightening torque: 18 f t-lb (25 N·m)
CAUTION
Always use a socket on the hex on the
bottom of the fuel filter housing to as-
sist in proper installation. Failure to
torque as required may result in a fuel
leak and a no start condition.
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15. Connect the wiring harness to thewater-in-fuel sensor.
16. Reinstall the fuel filter housing (stage 1) protector.
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.
FUEL FILTER REPLACEMENT (stage
2)
NOTE:
∙ It is possible the “Low Fuel Pressure:
See Owner’s Manual” message will
display on the vehicle information
display af ter fuel filter replacement
due to air being introduced into the
fuel system.
LDI2891LDI2893

∙If the “Low Fuel Pressure: See Owner’s
Manual” message is displayed on the
vehicle information display with the
engine running, complete a full key
cycle (turn the vehicle off and wait
2 minutes) and restart the vehicle. If
the message is still displayed or the
Malfunction Indicator Light is illumi-
nated af ter a full key cycle , it is rec-
ommended that you visit a NISSAN
dealer for service.
∙ For additional information on the lo-
cation of the fuel filter (stage 2), refer
to the “Engine compartment check
locations” in this section.
WARNING
∙ The fuel system (fuel pump, high pres- sure fuel lines, fuel rail, injectors) con-
tain very high pressure fuel. To avoid
the risk of personal injury or fire;
– Do not loosen any fittings while the engine is running.
– Wait at least 10 minutes af ter shut- ting down the engine before loos-
ening any fittings in the high-
pressure fuel system to allow
pressure to decrease to a lower
level. – Wear appropriate eye protection
and protective equipment as high-
pressure fuel spray can penetrate
the skin.
– Never smoke or allow sparks or flames (such as pilot lights, electri-
cal switches, or welding equip-
ment) in the work area. Never allow
diesel fuel to spill onto a hot ex-
haust manifold which can cause a
fire.
∙ Batteries can emit explosive gases. To reduce the possibility of personal in-
jury, always ventilate the compart-
ment before servicing the batteries.
To reduce the possibility of arcing, re-
move the negative (-) battery cable
first and attach the negative (-) bat-
tery cable last.
∙ When using a steam cleaner, wear safety glasses or a face shield, as well
as protective clothing. Hot steam can
cause serious personal injury.
∙ Wear appropriate eye and face pro- tection when using compressed air.
Flying debris and dirt can cause per-
sonal injury.
CAUTION
Clean all around the filter area before
disassembly. Dirt or contaminants can
damage the fuel system.
REMOVAL
WARNING
∙ Depending on the circumstance, fuelis flammable. When inspecting or per-
forming service or repairs on the fuel
system, to reduce the possibility of
fire and resulting severe personal in-
jury, death, or property damage, never
smoke or allow sparks or flames (such
as pilot lights, electrical switches, or
welding equipment) in the work area.
∙ Do not bleed the fuel system of a hot engine; this can result in fuel spilling
onto a hot exhaust manifold, which
can cause a fire.
1. Push the ignition switch to the OFF po- sition and wait 2 minutes before dis-
connecting the battery.
2. Disconnect the lef t and right side bat- teries.

3. Disconnect the harness connectorD
from the mass air flow sensor1.
4. Disconnect the harness connector
E
from the turbocharger compressor in-
take pressure/temperature sensor
2.
5. Clean the area around the fuel filter (Stage 2).
6. Remove the air cleaner lid and air inlet connection air ducts.
CAUTION
∙ Cap or wrap the air inlet ducts withsuitable material to avoid dirt or con-
taminants from entering the air inlet
system or engine.
∙ If step 6 is not performed, the fuel fil- ter element (Stage 2) cannot be in-
stalled correctly and will likely dam-
age the fuel filter element (Stage 2)
inner seal and can cause DTC’s to set
and/or a no-start condition.
7. Remove the cover
Afrom the stage 2
fuel filter by rotating counter-clockwise.
NOTE:
Remove the cover slowly to avoid fuel
spillage. 8. Remove the fuel filter element
Cfrom
the cover by hand. 9. Inspect the fuel filter element (Stage 2
3) to verif y the inner sealFis present.
If inner seal is missing from the filter
element proceed to step 10.
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10. Remove inner sealGfrom fuel filter
(Stage 2) housing
4.
11. Remove and discard the sealing o-ring
Bfrom the cover.
CAUTION
Do not reuse O-ring.
INSPECTION
Inspect the fuel filter housing and cover for
cracks, passage blockages, and other
damage. If damage is found, replacement
is mandatory.
It is recommended that you visit a NISSAN
dealer for this service.
INSTALLATION
CAUTION
Do not pre-fill the fuel filter with fuel.
Pre-filling the filter can result in debris
entering the fuel system and damaging
fuel system components.
12. Install a new o-ring on the cover. Lubri- cate the o-ring with petroleum jelly or
white lithium grease.
LDI3412LDI2892