2023 INFINITI QX80 coolant temperature

To use the engine block heater
1. Turn the engine off.
2. Open the hood and unwrap the engineblock heater cord.
3. Plug the engine block heater cord into a grounded 3-wire, 3-pronged extension
cord.
4. Plug the extension cord into a Ground Fault Interrupt (GFI) protected,
grounded 110-volt AC (VAC) outlet.
5. The engine block heater must be plugged in for at least 2 - 4 hours, depending on
outside temperatures, to properly warm
the engine coolant. Use an appropriate
timer to turn the engine block heater on.
6. Before starting the engine, unplug and properly store the cord to keep it away
from moving parts.
WARNING
.Do not use your engine block heater
with an ungrounded electrical system
or a 2-pronged adapter. You can be
seriously injured by an electrical
shock if you use an ungrounded
connection.
. Disconnect and properly store the
engine block heater cord before starting the engine. Damage to the
cord could result in an electrical shock
and can cause serious injury.
. Use a heavy-duty 3-wire, 3-pronged
extension cord rated for at least 10A.
Plug the extension cord into a Ground
Fault Interrupt (GFI) protected,
grounded 110-VAC outlet. Failure
to use the proper extension cord or
a grounded outlet can result in a fire
or electrical shock and cause serious
personal injury.
Starting and driving5-139

6-14In case of emergency
CAUTION
.Do not continue to drive if your
vehicle overheats. Doing so could
cause engine damage or a vehicle fire.
. To avoid the danger of being scalded,
never remove the radiator cap or
coolant reservoir cap while the en-
gine is still hot. When the radiator
cap or coolant reservoir cap is re-
moved, pressurized hot water will
spurt out, possibly causing serious
injury.
. Do not open the hood if steam is
coming out.
If your vehicle is overheating (indicated by an
extremely high temperature gauge reading),
or if you feel a lack of engine power, detect
abnormal noise, etc., take the following
steps:
1. Move the vehicle safely off the road, apply the parking brake and move the
shift lever to the P (Park) position.
Do not stop the engine.
2. Turn off the climate control. Open all the windows, move the heater or air condi-
tioner temperature control to maximum
hot and fan control to high speed. 3. If engine overheating is caused by climb-
ing a long hill on a hot day, run the engine
at a fast idle (approximately 1,500 rpm)
until the temperature gauge indication
returns to normal.
4. Get out of the vehicle. Look and listen for steam or coolant escaping from the
radiator before opening the hood. (If
steam or coolant is escaping, turn off the
engine.) Do not open the hood further
until no steam or coolant can be seen.
5. Open the engine hood.
WARNING
If steam or water is coming from the
engine, stand clear to prevent getting
burned.
6. Visually check drive belts for damage or looseness. Also check if the cooling fan is
running. The radiator hoses and radiator
should not leak water. If coolant is
leaking or the cooling fan does not run,
stop the engine.
WARNING
Be careful not to allow your hands, hair,
jewelry or clothing to come into contact
with, or get caught in, engine belts or the
engine cooling fan. The engine cooling
fan can start at any time.
7. After the engine cools down, check the coolant level in the reservoir tank with
the engine running. Add coolant to the
reservoir tank if necessary. Have your
vehicle repaired. It is recommended you
visit an INFINITI retailer for this service.
IF YOUR VEHICLE OVERHEATS

9-4Maintenance and schedules
equipped) hold securely in all latched posi-
tions.
Steering wheel:Check for changes in the
steering conditions, such as excessive free
play, hard steering or strange noises.
Warning lights and chimes: Make sure that
all warning lights and chimes are operating
properly.
Windshield defroster: Check that the air
comes out of the defroster outlets properly
and in sufficient quantity when operating
the heater or air conditioner.
Windshield wiper and washer*: Check that
the wipers and washer operate properly and
that the wipers do not streak.
Under the hood and vehicle
The maintenance items listed here should be
checked periodically (for example, each time
you check the engine oil or refuel).
Battery*: Check the fluid level in each cell. It
should be between the MAX and MIN lines.
Vehicles operated in high temperatures or
under severe condition require frequent
checks of the battery fluid level.
NOTE:
Care should be taken to avoid situations
that can lead to potential battery discharge
and potential no-start conditions such as: 1.
Installation or extended use of electro-
nic accessories that consume battery
power when the engine is not running
(Phone chargers, GPS, DVD players,
etc.)
2. Vehicle is not driven regularly and/or
only driven short distances.
In these cases, the battery may need to be
charged to maintain battery health.
Brake fluid level*: Make sure that the brake
fluid level is between the MAX and MIN lines
on the reservoir.
Engine coolant level*: Check the coolant
level when the engine is cold.
Engine drive belt*: Make sure that no belt is
frayed, worn, cracked or oily.
Engine oil level*: Check the level after
parking the vehicle on a level spot and
turning off the engine. Wait more than 15
minutes for the oil to drain back into the oil
pan.
Exhaust system: Make sure there are no
loose supports, cracks or holes. If the sound
of the exhaust seems unusual or there is a
smell of exhaust fumes, immediately have
the exhaust system inspected. It is recom-
mended you visit an INFINITI retailer for this
service. (See “Precautions when starting and
driving” (P.5-4) for exhaust gas (carbon
monoxide).) Fluid leaks:
Check under the vehicle for fuel,
oil, water or other fluid leaks after the
vehicle has been parked for a while. Water
dripping from the air conditioner after use is
normal. If you should notice any leaks or if
gasoline fumes are evident, check for the
cause and have it corrected immediately.
Power steering fluid level* and lines: Check
the level when the fluid is cold, with the
engine off. Check the lines for proper
attachment, leaks, cracks, etc.
Radiator and hoses: Check the front of the
radiator and clean off any dirt, insects,
leaves, etc., that may have accumulated.
Make sure the hoses have no cracks, defor-
mation, rot or loose connections.
Underbody: The underbody is frequently
exposed to corrosive substances such as
those used on icy roads or to control dust. It
is very important to remove these sub-
stances, otherwise rust will form on the
floor pan, frame, fuel lines and around the
exhaust system. At the end of winter, the
underbody should be thoroughly flushed
with plain water, being careful to clean
those areas where mud and dirt may accu-
mulate. For additional information, see
“Cleaning exterior” (P.7-2).
Windshield washer fluid*: Check that there
is adequate fluid in the reservoir.

4. Release the parking brake.
5. Drive slowly until the vehicle and trailerare clear from the blocks.
6. Apply and hold the brake pedal.
7. Have someone retrieve and store the blocks.
. While going downhill, the weight of the
trailer pushing on the tow vehicle may
decrease overall stability. Therefore, to
maintain adequate control, reduce your
speed and shift to a lower gear. Avoid
long or repeated use of the brakes when
descending a hill, as this reduces their
effectiveness and could cause overheat-
ing. Shifting to a lower gear instead
provides “engine braking” and reduces
the need to brake as frequently.
. If the engine coolant temperature rises to
a high temperature, see “If your vehicle
overheats” (P.6-14).
. Trailer towing requires more fuel than
normal circumstances.
. Avoid towing a trailer for your vehicle’s
first 500 miles (800 km).
. Have your vehicle serviced more often
than at intervals specified in the recom-
mended maintenance schedule shown in
the “9. Maintenance and schedules”
section. .
When making a turn, your trailer wheels
will be closer to the inside of the turn
than your vehicle wheels. To compensate
for this, make a larger than normal
turning radius during the turn.
. Crosswinds and rough roads will ad-
versely affect vehicle/trailer handling,
possibly causing vehicle sway. When
being passed by larger vehicles, be pre-
pared for possible changes in crosswinds
that could affect vehicle handling.
Do the following if the trailer begins to sway:
1. Take your foot off the accelerator pedal to allow the vehicle to coast and steer as
straight ahead as the road conditions
allow. This combination will help stabilize
the vehicle.
.Do not correct trailer sway by steering
or applying the brakes.
2. When the trailer sway stops, gently apply the brakes and pull to the side of
the road in a safe area.
3. Try to rearrange the trailer load so it is balanced as described earlier in this
section.
. Be careful when passing other vehicles.
Passing while towing a trailer requires
considerably more distance than normal
passing. Remember the length of the
trailer must also pass the other vehicle
before you can safely change lanes. .
Use the TOW mode or downshift the
transmission to a lower gear for engine
braking when driving down steep or long
hills. This will help slow the vehicle
without applying the brakes.
. Avoid holding the brake pedal down too
long or too frequently. This could cause
the brakes to overheat, resulting in
reduced braking efficiency.
. Increase your following distance to allow
for greater stopping distances while
towing a trailer. Anticipate stops and
brake gradually.
. INFINITI recommends that the cruise
control not be used while towing a
trailer.
. While towing a trailer, do not use the
following systems (if so equipped):
— the Lane Departure Warning (LDW) system
(See “How to enable/disable the
LDW system” (P.5-24).)
— the Lane Departure Prevention (LDP) system
(See “How to enable/disable the LDP
system” (P.5-30).)
— the Blind Spot Warning (BSW) system (See “How to enable/disable the
BSW system” (P.5-36).)
— the Blind Spot Intervention
®(BSI)
system
Technical and consumer information10-29

11-2
C
Cabin air filter ....................................................... 4-35
Camera aiding sonar function ......................... 4-17
Capacities and
recommended fluids/lubricants ....................... 10-2
Car phone or CB radio ....................................... 4-37
Cargo floor box .................................................... 2-72
Cargo light ............................................................. 2-81
Catalytic converter, Three way catalyst ......... 5-4
Center ventilators ................................................ 4-27
ChargerWireless charger ............................................ 2-63
Child restraints ..................................................... 1-30 Booster seats .................................................. 1-48
LATCH system ............................................... 1-33
Precautions on child restraints .................. 1-31
Top tether strap ............................................. 1-35
Child safety ........................................................... 1-28
Child safety rear door lock .................................. 3-6
Chimes Audible reminders .......................................... 2-19
Seat belt warning light and chime ............ 2-14
Circuit breaker, Fusible link .............................. 8-19
Cleaning exterior and interior .................... 7-2, 7-5
Climate control Automatic air conditioner .......................... 4-30
Automatic climate control ......................... 4-28
Clock ........................................................................\
2-37
Coat hooks ............................................................. 2-71
Cockpit ...................................................................... 2-3 Cold weather driving ........................................ 5-137
Console box ........................................................... 2-70
Console light ......................................................... 2-80
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 ....................................................... 5-62
Fixed speed cruise control (on
ICC system) ..................................................... 5-81
Intelligent Cruise Control (ICC) ................ 5-64
Cruise indicator .................................................... 2-31
Cup holders ........................................................... 2-66
Current fuel consumption ................................. 2-35
D
Daytime Running Lights (DRL) system ......... 2-50
Digital video disc DVD ....................................... 4-37
Dimensions ......................................................... 10-10
Distance Control Assist (DCA) system .......... 5-85
Drive belts .............................................................. 8-13
Drive positioner .................................................... 3-39
Driver and front passenger supplemental
knee air bag ........................................................... 1-65
Driver Attention Alert (DAA) ......................... 5-112
Driving Cold weather driving .................................. 5-137
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
E-Call (SOS) Button ........................................... 2-65
Economy, Fuel .................................................... 5-116
Elapsed time ......................................................... 2-35
Elapsed time and trip odometer ..................... 2-35
Emission control information label ............... 10-12
Emission control system warranty .............. 10-32
Engine
Before starting the engine .......................... 5-15
Break-in schedule ........................................ 5-114
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 ................................... 5-138
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 viscosity ........................................ 10-7
Engine serial number ................................. 10-12
Engine specifications ................................... 10-8
Engine start operation indicator ............... 2-28

If your vehicle overheats ............................. 6-14
Oil pressure gauge .......................................... 2-9
Protection mode ............................................ 5-17
Starting the engine ....................................... 5-15
Entry/exit function, memory seat .................. 3-39
Event Data Recorders (EDR) ........................ 10-35
Exhaust gas (carbon monoxide) ........................ 5-4
Explanation of scheduled
maintenance items ................................................. 9-5
Extended storage switch .................................. 8-20
F
F.M.V.S.S./C.M.V.S.S. certification label .... 10-12
Filter Air 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 .......................................................... 10-31
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 ................................................... 2-52
Forward Emergency Braking (FEB) with
Pedestrian Detection system ........................... 5-95
Forward Emergency Braking system
warning light ......................................................... 2-16
Front and rear sonar system .......................... 5-126
Front passenger air bag and status light ..... 1-59
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 ............................................... 5-116
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 ................................. 5-115
Fuses ....................................................................... 8-18
Fusible links ........................................................... 8-19
G
Garage door opener
HomeLink®
Universal Transceiver ....................... 2-81, 2-85
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 ................................................. 2-35
General maintenance ............................................. 9-2
Glove box ............................................................... 2-69
H
Hazard warning flasher switch ........................... 6-2
Head restraints/headrests ................................ 1-13
Headlight washer ................................................ 2-50
Headlights Aiming control ................................................ 2-49
Aiming control (See adaptive front
lighting system (AFS)) ................................. 2-50
Bulb replacement .......................................... 8-24
Headlight switch ........................................... 2-44
Heated seats ......................................................... 2-54
Heated steering wheel ....................................... 2-53
Heater Automatic climate control ......................... 4-28
Engine block heater ................................... 5-138
High beam assist ................................................. 2-47
Hill start assist system ..................................... 5-123
HomeLink
®Universal Transceiver ...... 2-81, 2-85
Hood release ......................................................... 3-21
11-3

Turn signal switch ......................................... 2-52
Vehicle dynamic control (VDC)
off switch ......................................................... 2-58
T
Tachometer ............................................................. 2-8
Temperature gauge, Engine coolant
temperature gauge ............................................... 2-8
Theft (INFINITI Vehicle Immobilizer System),
Engine start ........................................................... 2-39
Three-way catalyst ............................................... 5-4
Tilt/telescopic steering ...................................... 3-29
TirePressure, Low tire pressure
warning light ................................................... 2-16
Tires Flat tire ............................................................... 6-3
Low tire pressure warning system ............. 5-5
Tire and Loading
information label ............................. 8-29, 10-13
Tire chains ........................................................ 8-35
Tire dressing ...................................................... 7-4
Tire pressure ................................................... 8-27
Tire pressure monitoring
system (TPMS) ........................................ 5-5, 6-3
Tire rotation .................................................... 8-35
Types of tires ................................................. 8-34
Uniform tire quality grading .................... 10-31
Wheel/tire size ............................................... 10-9
Wheels and tires ............................................ 8-27 Top
Tether strap child restraints ....................... 1-35
TOW mode .......................................................... 5-125
TOW mode switch .............................................. 2-58
Towing Flat towing ................................................... 10-31
Tow truck towing .......................................... 6-15
Towing a trailer ........................................... 10-19
Towing safety .............................................. 10-23
TPMS, Tire pressure monitoring system ......... 5-5
TPMS with Tire Inflation Indicator ............. 5-7
TPMS, Tire pressure warning system .............. 6-3
Trailer towing ..................................................... 10-19
Transceiver HomeLink
®
Universal Transceiver ....................... 2-81, 2-85
Transmission Automatic Transmission Fluid (ATF) ......... 8-8
Driving with automatic transmission ....... 5-18
Transmission shift lever lock release ....... 5-21
Transmitter (See remote keyless
entry system) ........................................................ 3-15
Traveling or registering your vehicle in
another country ................................................. 10-11
Trip computer ....................................................... 2-35
Trip odometer ....................................................... 2-35
Turn signal switch ............................................... 2-52
U
Underbody cleaning ............................................... 7-3
Uniform tire quality grading ........................... 10-31 USB (Universal Serial Bus)
charging connector ............................................. 2-62
V
Vanity mirror ......................................................... 3-39
Vanity mirror lights ............................................. 2-81
Variable voltage control system ..................... 8-13
Vehicle
Dimensions ................................................... 10-10
Identification number (VIN) ...................... 10-11
Loading information .................................. 10-15
Recovery (freeing a stuck vehicle) ............ 6-18
Security system .............................................. 2-38
Vehicle dynamic control (VDC)
off switch ......................................................... 2-58
Vehicle dynamic control
(VDC) system ................................................ 5-135
Vehicle dynamic control (VDC)
warning light ................................................... 2-18
Vehicle information display .............................. 2-20
How to use the vehicle
information display ....................................... 2-21
Settings ............................................................ 2-21
Vehicle speed ........................................................ 2-35
Ventilators ............................................................. 4-27
Voltmeter ............................................................... 2-10
W
Warning
Blind Spot Warning ....................................... 5-34
11-7