2016 NISSAN TITAN sensor

The water/fuel separator should be drained when
indicated by illumination of the water in fuel warn-
ing light.
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.
ENGINE PROTECTION MODE
The diesel engine in this vehicle is equipped with
electronically controlled fuel and emission sys-
tems. Both systems monitor engine temperatures
and pressures, and then modify 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 extended peri-
ods of time, and the service engine soon light is
illuminated, have the system checked. It is recom-
mended 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 inter-
val beyond the recommended interval can nega-
tively affect engine performance, fuel economyand engine life. For additional information, refer to
the “Do-it-yourself” section of this manual.
GLOW PLUGS
The diesel engine glow plug system consists 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 energized varies depend-
ing on engine and environmental conditions. The
required time for the glow plugs to be energized
decreases as coolant temperature increases. For
additional information, refer to the “Starting and
stopping the engine” section of this manual.
DIESEL PARTICULATE FILTER
SYSTEM
Your vehicle is equipped with a diesel particulate
filter in the exhaust system. The diesel particulate
filter reduces carbon emissions by trapping ex-
haust particulates (soot) before they reach the
tailpipe. You must properly maintain your diesel
particulate filter in order for it to function properly.
Regeneration of the diesel particulate filter oc-
curs automatically during operation above 5 mph
(8 km/h) and requires no actions from the driver.
If you do a lot of idling or stop and go driving, pay attention to maintenance messages that alert you
when you need to drive to activate the automatic
regeneration process. For additional information,
refer to the ”Automatic Regeneration” in the “Do-
it-yourself” section of this manual.
SELECTIVE CATALYTIC REDUCTION
SYSTEM
Your vehicle is equipped with a selective catalytic
reduction system designed to reduce emission
levels of nitrogen oxides from the exhaust of your
diesel engine. This system relies on the use of
Diesel Exhaust Fluid (DEF) that you must replen-
ish at certain intervals. Failure to maintain proper
DEF levels or if the DEF becomes contaminated
will result in vehicle speed limitation to 5 mph. For
additional information, refer to the ”Meters and
gauges” and “Capacities and Specifications”
sections of this manual.
Introduction1-3

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 position and wait 2 minutes before disconnecting the
battery.
2. Disconnect the batteries.
3. Clean the area around the stage 1 fuel filter. 4. Drain the fuel filter housing. For additional
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
Bfrom the
module
C.
NOTE:
It may be necessary to use a screwdriver in
the slots provided to remove the fuel filter
element from the housing.8. Remove the fuel filter element
Dby lifting it
out of the fuel filter housing.
9. Remove and discard the sealing o-ring
E
from the fuel filter housing.
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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.
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. Lubricate the inner seal of the fuel filter ele- ment with petroleum jelly or white lithium
grease.
11. Install a new o-ring on the housing. Lubricate 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 element
with petroleum jelly or white lithium grease
before placing it into the housing.
12. Install the fuel filter element into the fuel filter
housing and make sure the four tabs
Fare
properly seated into the four slots
G.
13. Install the fuel filter housing on the module.
Fuel filter housing tightening torque: 21 ft-lb (28 N·m)
14. Connect the wiring harness to the water-in- fuel sensor.
15. Connect the batteries.
16. Prime the fuel system. For additional infor- mation, refer to “Fuel system priming” in this
section.
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