2018 INFINITI QX80 fuel pressure

8-2Do-it-yourself
When performing any inspection or main-
tenance work on your vehicle, always take
care to prevent serious accidental injury to
yourself or damage to the vehicle. The
following are general precautions which
should be closely observed.
WARNING
.Park the vehicle on a level surface,
apply the parking brake securely and
block the wheels to prevent the
vehicle from moving. Move the shift
lever to P (Park).
. Be sure the ignition switch is in the
OFF or LOCK position when per-
forming any parts replacement or
repairs.
. Never connect or disconnect the
battery or any transistorized compo-
nent while the ignition switch is in the
ON position.
. Never leave the engine or automatic
transmission related component har-
nesses disconnected while the igni-
tion switch is in the ON position.
. If you must work with the engine
running, keep your hands, clothing,
hair and tools away from moving
fans, belts and any other moving parts.
. It is advisable to secure or remove
any loose clothing and remove any
jewelry, such as rings, watches, etc.
before working on your vehicle.
. Always wear eye protection when-
ever you work on your vehicle.
. If you must run the engine in an
enclosed space such as a garage, be
sure there is proper ventilation for
exhaust gases to escape.
. Never get under the vehicle while it is
supported only by a jack. If it is
necessary to work under the vehicle,
support it with safety stands.
. Keep smoking materials, flame and
sparks away from fuel tank and the
battery.
. Your vehicle is equipped with an
automatic engine cooling fan. It may
come on at any time without warn-
ing, even if the ignition key is in the
OFF position and the engine is not
running. To avoid injury, always dis-
connect the negative battery cable
before working near the fan.
. On gasoline engine models, the fuel
filter or fuel lines should be serviced
because the fuel lines are under high
pressure even when the engine is off. It is recommended you visit an
INFINITI retailer for this service.
CAUTION
.
Do not work under the hood while the
engine is hot. Turn the engine off and
wait until it cools down.
. Avoid direct contact with used en-
gine oil and coolant. Improperly dis-
posed engine oil, coolant, and/or
other vehicle fluids can damage the
environment. Always conform to lo-
cal regulations for disposal of vehicle
fluid.
This “8. Do-it-yourself” section gives in-
structions regarding only those items which
are relatively easy for an owner to perform.
A genuine INFINITI Service Manual is also
available. (See “Owner’s Manual/Service
Manual order information” (P.10-34).)
You should be aware that incomplete or
improper servicing may result in operating
difficulties or excessive emissions, and could
affect your warranty coverage. If in doubt
about any servicing, it is recommended you
have it done by an INFINITI retailer.
MAINTENANCE PRECAUTIONS

11-2
Cargo floor box .................................................... 2-60
Cargo light ............................................................. 2-68
Catalytic converter, Three way catalyst ......... 5-4
Center ventilators ................................................ 4-25
Chassis and body maintenance ....................... 9-10
Child restraints ...................................................... 1-31Booster seats .................................................. 1-48
LATCH system ............................................... 1-33
Precautions on child restraints .................. 1-31
Top tether strap ............................................. 1-36
Child safety ........................................................... 1-29
Child safety rear door lock .................................. 3-6
Chimes Audible reminders .......................................... 2-21
Seat belt warning light and chime ............ 2-17
Circuit breaker, Fusible link .............................. 8-19
Cleaning exterior and interior .................... 7-2, 7-5
Climate control Automatic climate control ............. 4-26, 4-28
Clock ........................................................................\
2-51
Coat hooks ............................................................ 2-59
Cockpit ...................................................................... 2-3
Cold weather driving ........................................ 5-136
Console box ........................................................... 2-57
Coolant Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine coolant ............................... 8-5
Checking engine coolant level ...................... 8-5
Corrosion protection ............................................. 7-8 Cruise control ....................................................... 5-65
Fixed speed cruise control (on
ICC system) .................................................... 5-84
Intelligent cruise control (ICC) system .... 5-66
Cup holders ........................................................... 2-54
D
Daytime running light system .......................... 2-42
Dimensions ......................................................... 10-10
Distance Control Assist (DCA) system .......... 5-87
Distance Control Assist (DCA) system
warning light ......................................................... 2-14
Drive belts .............................................................. 8-13
Drive positioner .................................................... 3-39
Driving Cold weather driving ................................. 5-136
Driving with automatic transmission ....... 5-18
On-pavement and off-road driving ........... 5-8
Precautions when starting and driving ..... 5-4
Safety precautions ........................................ 5-10
E
Economy, Fuel ................................................... 5-120
Elapsed time ......................................................... 2-29
Emission control information label ............... 10-12
Emission control system maintenance ............ 9-8
Emission control system warranty ............... 10-31
EngineBefore starting the engine .......................... 5-15
Break-in schedule ........................................ 5-119 Capacities and recommended fluids/
lubricants .......................................................... 10-2
Changing engine coolant ............................... 8-5
Changing engine oil and filter ...................... 8-6
Checking engine coolant level ...................... 8-5
Checking engine oil level ............................... 8-6
Coolant temperature gauge ......................... 2-8
Emergency engine shut off ......................... 5-14
Engine block heater .................................... 5-137
Engine compartment check locations ........ 8-3
Engine cooling system ................................... 8-4
Engine oil ........................................................... 8-6
Engine oil and oil
filter recommendation .................................. 10-6
Engine oil replacement indicator ............... 2-27
Engine oil viscosity ........................................ 10-7
Engine serial number ................................. 10-12
Engine specifications ................................... 10-8
Engine start operation indicator ............... 2-24
If your vehicle overheats ............................. 6-14
Oil pressure gauge .......................................... 2-9
Protection mode ............................................ 5-17
Remote engine start
operation indicator ........................................ 2-24
Starting the engine ....................................... 5-15
Entry/exit function, Automatic
drive positioner .................................................... 3-39
Event Data Recorders (EDR) ........................ 10-33
Exhaust gas (carbon monoxide) ........................ 5-4
Explanation of scheduled
maintenance items ................................................. 9-5

Extended storage fuse warning ...................... 2-25
Extended storage switch .................................. 8-20
F
F.M.V.S.S./C.M.V.S.S. certification label .... 10-12
FilterAir cleaner housing filter ............................. 8-14
Changing engine oil and filter ...................... 8-6
Flashers (See hazard warning
flasher switch) ......................................................... 6-2
Flat tire ...................................................................... 6-3
Flat towing ......................................................... 10-30
Flexible seating ..................................................... 1-11
Floor mat cleaning ................................................. 7-6
Fluid
Automatic Transmission Fluid (ATF) ......... 8-8
Brake fluid ......................................................... 8-9
Capacities and
recommended fluids/lubricants ................. 10-2
Engine coolant .................................................. 8-4
Engine oil ........................................................... 8-6
Power steering fluid ....................................... 8-8
Window washer fluid .................................. 8-10
Fog light switch ................................................... 2-44
Forward Emergency Braking (FEB) with
pedestrian detection system ......................... 5-100
Forward Emergency Braking system
warning light ......................................................... 2-15
Front passenger air bag and status light ..... 1-60
Front power seat adjustment ............................. 1-4 Front seat
Front seat adjustment ........................ 1-4, 1-10
Front-seat active head restraint ...................... 1-17
Fuel
Capacities and
recommended fluids/lubricants ................. 10-2
Fuel economy .............................................. 5-120
Fuel information ........................................... 10-4
Fuel octane rating ........................................ 10-4
Fuel-filler cap .................................................. 3-26
Fuel-filler door ............................................... 3-26
Gauge .................................................................. 2-9
LOOSE FUEL CAP warning ...................... 3-28
Fuel efficient driving tips ................................. 5-119
Fuses ....................................................................... 8-18
Fusible links ........................................................... 8-19
G
Garage door opener HomeLink®
Universal Transceiver ....................... 2-68, 2-72
Gas cap ................................................................... 3-26
Gauge ........................................................................\
. 2-6 Engine coolant temperature gauge ............ 2-8
Engine oil pressure gauge ............................. 2-9
Fuel gauge ......................................................... 2-9
Odometer ............................................................ 2-7
Speedometer ...................................................... 2-7
Tachometer ....................................................... 2-8
Trip computer ................................................. 2-28
General maintenance ............................................. 9-2 Glove box ............................................................... 2-56
H
Hazard warning flasher switch ........................... 6-2
Head restraints/headrests ................................ 1-13
Headlight washer ................................................ 2-42
Headlights
Aiming control ................................................ 2-41
Aiming control (See adaptive front
lighting system (AFS)) .................................. 2-42
Bulb replacement .......................................... 8-24
Headlight switch ............................................ 2-37
Heated seats ......................................................... 2-46
Heated steering wheel ....................................... 2-45
Heater Automatic climate control ............. 4-26, 4-28
Engine block heater .................................... 5-137
High beam assist ................................................. 2-39
Hill start assist system ..................................... 5-128
HomeLink
®Universal Transceiver ...... 2-68, 2-72
Hood release ......................................................... 3-21
Hook Coat hooks ...................................................... 2-59
Luggage hook ................................................. 2-59
Horn ........................................................................\
. 2-45
I
Ignition switch (Push-button) .......................... 5-12
Immobilizer system .............................................. 2-32
In-cabin microfilter .............................................. 4-35
11-3

11-4
IndicatorLights ................................................................ 2-18
Vehicle information display ........................ 2-21
Indicator light
Lane Departure Warning (LDW) indicator
light (green) ..................................................... 2-19
Infiniti InTouch Owner’s Manual ...................... 4-2
INFINITI Vehicle Immobilizer System ............ 2-32
Inside mirror .......................................................... 3-30
Inspection/maintenance (I/M) test ............. 10-33
Instrument brightness control ......................... 2-43
Instrument panel ..................................................... 2-5
Intelligent cruise control (ICC) system .......... 5-66
Main switch indicator ................................... 2-26
Intelligent Cruise Control (ICC) system
warning light ......................................................... 2-15
Intelligent Key .......................................................... 3-2
Intelligent Key system ........................................... 3-7 Battery replacement .................................... 8-20
Key operating range ....................................... 3-9
Key operation ................................................. 3-10
Warning light .................................................. 2-15
Warning signals .............................................. 3-12
Intelligent Key warning light ............................ 2-15
Interior light control switch .............................. 2-67
Interior light replacement .................................. 8-24
Interior lights ......................................................... 2-66
ISOFIX child restraint ......................................... 1-33J
Jump starting ......................................................... 6-11
K
Keyless entry (See remote keyless
entry system) ........................................................ 3-15
Keys ........................................................................\
.... 3-2
For Intelligent Key system ............................. 3-7
L
LabelsAir bag warning labels ................................. 1-68
Air conditioner specification label ......... 10-13
Emission control information label ........ 10-12
Engine serial number ................................. 10-12
F.M.V.S.S./C.M.V.S.S.
certification label ........................................ 10-12
Tire and Loading
information label ............................. 8-29, 10-13
Vehicle identification number (VIN) ....... 10-11
Lane Departure Warning (LDW) indicator
light (green) ........................................................... 2-19
Lane Departure Warning (LDW) indicator
light (orange) ......................................................... 2-15
Lane Departure Warning (LDW)/Lane
Departure Prevention (LDP) ........................... 5-22
LATCH system ..................................................... 1-33
License plate, Installing front
license plate ......................................................... 10-13 Liftgate ................................................................... 3-21
Light
Air bag warning light .................................... 1-69
Bulb replacement ........................................... 8-23
Cargo light ....................................................... 2-68
Fog light switch ............................................ 2-44
Headlight switch ............................................ 2-37
Headlights bulb replacement .................... 8-24
Indicator lights ................................................ 2-18
Interior light control switch ........................ 2-67
Interior lights ................................................... 2-66
Map lights ........................................................ 2-66
Replacement ................................................... 8-23
Vanity mirror lights ....................................... 2-68
Warning/indicator lights and
audible reminders .......................................... 2-12
Lights, Exterior and interior
light replacement ................................................. 8-24
Linking Intelligent Key ........................................ 4-35
Loading information (See vehicle
loading information) ........................................ 10-14
Lock Automatic door locks ..................................... 3-6
Door locks .......................................................... 3-4
Liftgate lock .................................................... 3-21
Power door lock ............................................... 3-4
Locking with mechanical key ............................. 3-4
Loose fuel cap warning ..................................... 3-26
Low outside temperature warning ................. 2-26
Low tire pressure warning light ...................... 2-15

11-8
Vehicle dynamic control (VDC)
warning light ................................................... 2-18
Vehicle information display .............................. 2-21
Ventilators ............................................................. 4-25
Voltmeter ............................................................... 2-10
W
Warning Check tire pressure warning ....................... 2-25
Hazard warning flasher switch .................... 6-2
Lights ................................................................ 2-12
Loose fuel cap warning ............................... 2-25
Predictive Forward Collision
Warning (PFCW) ........................................ 5-110
Tire pressure monitoring
system (TPMS) ........................................ 5-5, 6-3
Vehicle information display ........................ 2-21
Warning lights, indicator lights and
audible reminders .......................................... 2-11
Warning labels, Air bag warning labels ........ 1-68
Warning light
4WD warning light ..................................... 5-126
Air bag warning light ......................... 1-69, 2-17
Anti-lock braking system (ABS)
warning light ................................................... 2-12
Brake warning light ....................................... 2-13
Forward Emergency Braking system
warning light ................................................... 2-15
Intelligent Key warning light ...................... 2-15
Lane Departure Warning (LDW) indicator
light (orange) ................................................... 2-15 Low tire pressure warning light ................ 2-15
Seat belt warning light and chime ............ 2-17
Warranty, Emission control
system warranty ................................................ 10-31
Washer switch Rear window wiper and
washer switch ................................................ 2-36
Windshield wiper and washer switch ...... 2-33
Washing .................................................................... 7-2
Waxing ....................................................................... 7-2
Welcome light ....................................................... 2-65
Wheel/tire size ..................................................... 10-9
Wheels and tires .................................................. 8-27
Care of wheels .................................................. 7-3
Cleaning aluminum alloy wheels .................. 7-3
Cleaning bright wheels .................................. 7-4
Window washer fluid ......................................... 8-10
Window(s) Cleaning ............................................................... 7-3
Power windows ............................................. 2-61
Windshield wiper and washer switch ............ 2-33
Wiper
Rain-sensing auto wiper system ............... 2-35
Rear window wiper and
washer switch ................................................ 2-36
Windshield wiper and washer switch ...... 2-33
Wiper blades ................................................... 8-15

FUEL INFORMATION
VK56VD engine
INFINITI recommends the use of unleaded
premium gasoline with an octane rating of at
least 91 AKI (Anti-Knock Index) number
(Research octane number 96).
If unleaded premium gasoline is not avail-
able, you may use unleaded regular gasoline
with an octane rating of at least 87 AKI
number (Research octane number 91), but
you may notice a decrease in performance.
CAUTION
.Using a fuel other than that specified
could adversely affect the emission
control systems, and may also affect
warranty coverage.
. Under no circumstances should a
leaded gasoline be used, because this
will damage the three way catalyst.
. Do not use E-15 or E-85 fuel in your
vehicle. Your vehicle is not designed
to run on E-15 or E-85 fuel. Using E-
15 or E-85 fuel in a vehicle not
specifically designed for E-15 or E-
85 fuel can adversely affect the emission control devices and systems
of the vehicle. Damage caused by
such fuel is not covered by the
INFINITI new vehicle limited war-
ranty.
. Do not use fuel that contains the
octane booster methylcyclopentadie-
nyl manganese tricarbonyl (MMT).
Using fuel containing MMT may
adversely affect vehicle performance
and vehicle emissions. Not all fuel
dispensers are labeled to indicate
MMT content, so you may have to
consult your gasoline retailer for
more details. Note that Federal and
California laws prohibit the use of
MMT in reformulated gasoline.
. U.S. government regulations require
ethanol dispensing pumps to be iden-
tified by a small, square, orange and
black label with the common abbre-
viation or the appropriate percen-
tage for that region.
ENGINE OIL RECOMMENDA-
TION:
.Genuine “NISSAN Motor Oil 0W-20
SN”.
See “Capacities and recommended fluids/
lubricants” (P.10-2) for engine oil and oil
filter recommendation.
COLD TIRE PRESSURES:
The label is typically located on the driver
side center pillar or on the driver’s door. For
additional information, see “Wheels and
tires” (P.8-27).
NEW VEHICLE BREAK-IN PRO-
CEDURES RECOMMENDATION:
During the first 1,200 miles (2,000 km) of
vehicle use, follow the recommendations
outlined in the “Break-in schedule” (P.5-
119). Follow these recommendations for
the future reliability and economy of your
new vehicle.
GAS STATION INFORMATION