cooling INFINITI QX80 2023 Owners Manual

4-28Monitor, climate, audio, phone and voice recognition systems
WARNING
.The air conditioner cooling function
operates only when the engine is
running.
. Do not leave children or adults who
would normally require the support
of others alone in your vehicle. Pets
should not be left alone either. On
hot, sunny days, temperatures in a
closed vehicle could quickly become
high enough to cause severe or
possibly fatal injuries to people or
animals.
. Do not use the recirculation mode for
long periods as it may cause the
interior air to become stale and the
windows to fog up.
. Do not adjust the heating and air
conditioning controls while driving so
that full attention may be given to
vehicle operation.
Start the engine and operate the climate
control system.
NOTE:
. Odors from inside and outside the
vehicle can build up in the air conditioner
unit. Odor can enter the passenger compartment through the ventilators.
. When parking, set the heater and air
conditioner controls to turn off air
recirculation to allow fresh air into the
passenger compartment. This should
help reduce odors inside the vehicle.
HEATER AND AIR CONDITIONER

4-30Monitor, climate, audio, phone and voice recognition systems
AUTOMATIC AIR CONDITIONER
Automatic operation
Cooling and/or dehumidified heating
(AUTO):
This mode may be used all year round as the
system automatically works to keep a con-
stant temperature. Air flow distribution and
fan speed are also controlled automatically.
1. Push the AUTO button. (The indicatorlight on the button will illuminate.)
2. Turn the temperature control dial on the corresponding side to set the desired
temperature.
.You can individually set temperatures
for the driver’s side and front passen-
ger’s side when the indicator light on
the SYNC button is not illuminated.
A visible mist may be seen coming from the
ventilators in hot, humid conditions as the air
is cooled rapidly. This does not indicate a
malfunction.
Heating (A/C OFF):
The air conditioner does not activate in this
mode. Use this mode when you only need to
heat.
1. Push the AUTO button. (The indicator light on the button will illuminate.) 2. Push the A/C button. (The indicator light
on the button will turn off.)
3. Turn the temperature control dial on the corresponding side to set the desired
temperature.
.You can individually set temperaturesfor the driver’s side and front passen-
ger’s side when the indicator light on
the SYNC button is not illuminated.
.The temperature of the passengercompartment will be maintained
automatically. Air flow distribution
and fan speed are also controlled
automatically.
NOTE:
. Do not set the temperature lower than
the outside air temperature or the
system may not work properly.
. Not recommended if windows fog up.
Dehumidified defrosting or defogging:
1. Push the
button. (The indicator light
on the button will illuminate.)
2. Turn the temperature control dial on the corresponding side to set the desired
temperature.
.To quickly remove ice from the outsideof the windows, use thebutton to
set the fan speed to maximum.
.As soon as possible after the wind- shield is cleared, push the AUTO button to return to the automatic
mode.
Manual operation
Fan speed control:
Push the
buttons to manually control
the fan speed.
Air intake control (Without Advanced Cli-
mate Control System):
. Push the
button to recirculate inter-
ior air inside the vehicle. (The indicator
light on the button will illuminate.)
. Push the
button to draw outside air
into the passenger compartment. (The
indicator light on the button will illumi-
nate.)
. To control the air intake automatically,
push and hold either the
button or
thebutton. The indicator light will
blink, and then the air intake will switch
to automatic control. When the auto-
matic control is set, the system auto-
matically alternates between the outside
air circulation and the air recirculation
modes. (The indicator light of the active
mode will illuminate.)
Air intake control (With Advanced Climate
Control System):
. Push the
button to recirculate inter-
ior air inside the vehicle. (The indicator

4-32Monitor, climate, audio, phone and voice recognition systems
industry odors such as pulp or chemicals, and
exhaust gas such as gasoline or diesel. When
such odors or gas are detected, the system
automatically changes from the outside air
circulation mode to the recirculation mode.
When the
button is pushed under the
following conditions, the indicator light on
the button will illuminate and the exhaust
gas detection sensor will turn on.
. The air flow control is not in the front
defroster mode. (The indicator light on
the
button is turned off.)
. The outside temperature is about 32°F
(0°C) or more.
When the automatic intake air control is ON,
for the first 5 minutes, the recirculation
mode is selected to prevent dust, dirt and
pollen from entering the vehicle and cleans
the air inside of the vehicle with positive and
negative ions that are emitted from the
ventilator.
After the 5 minutes, the sensor detects
exhaust gas and automatically alternates
between the recirculation mode and outside
air circulation mode.
WAE0641X
REAR AUTOMATIC AIR CONDI-
TIONING SYSTEM
Push the REAR ON·OFF button on the front
air conditioner control panel to turn on the
rear automatic air conditioning system. (The
indicator light on the button will illuminate.)
To control the rear automatic air condition-
ing system with the front air conditioner
control panel, push the REAR CTRL button.
(The indicator light on the button will
illuminate.)
The rear automatic air conditioning system
can also be adjusted by using the rear air
conditioner control panel located on the rear
of the center console. (See “Rear air condi- tioner control panel operation” (P.4-34).)
Front air conditioner control panel
operation
Automatic operation:
1. Push the REAR ON·OFF button to turn
on the rear automatic air conditioning
system. (The indicator light on the button
will illuminate.) Push the REAR CTRL
button to operate the rear automatic air
conditioning system. (The indicator light
on the button will illuminate.)
2. Push the AUTO button. (The AUTO indicator light on the button will illumi-
nate and “AUTO” will appear on the rear
air conditioner control panel.)
3. Turn the temperature control dial (dri- ver’s side) to set the desired tempera-
ture.
Cooling and dehumidified heating:
1. Push the REAR ON·OFF button to turn on the rear automatic air conditioning
system. (The indicator light on the button
will illuminate.) Push the REAR CTRL
button to operate the rear automatic air
conditioning system. (The indicator light
on the button will illuminate.)
2. Turn the temperature control dial (dri- ver’s side) to set the desired tempera-
ture.

ENGINE PROTECTION MODE
The engine has an engine protection mode to
reduce the chance of damage if the coolant
temperature becomes too high (for example,
when climbing steep grades in high tem-
perature with heavy loads, such as when
towing a trailer).
When the engine temperature reaches a
certain level:
.The engine coolant temperature gauge
will move toward the H position.
. Engine power may be reduced.
. The air conditioning cooling function may
be automatically turned OFF for a short
time (the blower will continue to oper-
ate).
Engine power and, under some conditions,
vehicle speed will decrease. Vehicle speed
can be controlled with the accelerator pedal,
but the vehicle may not accelerate at the
desired speed. The transmission will down-
shift or upshift as it reaches prescribed shift
points. You can also shift manually.
As driving conditions change and engine
coolant temperature is reduced, vehicle
speed can be increased using the accelerator
pedal, and air conditioning cooling function
will automatically be turned back ON. If:
1. The engine coolant temperature is not
reduced.
2. The air conditioning cooling function does not turn back ON.
3. The engine oil pressure warning light
illuminates or engine coolant tempera-
ture gauge does not return to the normal
range from the H position, this may
indicate a malfunction. Move the vehicle
off the road to a safe area and allow the
engine to cool. If after checking the oil
and coolant, the
remains on or
engine coolant temperature does not
return to the normal range, do not
continue to drive. It is recommended
you contact an INFINITI retailer.
The Malfunction Indicator Light (MIL)
may also come ON. You do not need to have
your vehicle towed, unless it remains on, but
have it inspected soon. It is recommended
you visit an INFINITI retailer for this service.
See “Warning lights, indicator lights and
audible reminders” (P.2-11).
WARNING
Overheating can result in reduced engine
power and vehicle speed. The reduced
speed may be lower than other traffic, which could increase the chance of a
collision. Be especially careful when
driving. If the vehicle cannot maintain a
safe driving speed, pull to the side of the
road in a safe area. Allow the engine to
cool and return to normal operation. See
“If your vehicle overheats” (P.6-14).
CAUTION
Running the engine with the engine oil
pressure warning light on could cause
serious damage to the engine almost
immediately. Such damage is not cov-
ered by warranty. Turn off the engine as
soon as it is safe to do so.
Starting and driving5-17
DRIVING THE VEHICLE

Follow these easy-to-use Fuel Efficient
Driving Tips to help you achieve the most
fuel economy from your vehicle.
1. Use smooth accelerator and brake pedalapplication.
.Avoid rapid starts and stops..Use smooth, gentle accelerator andbrake application whenever possible.
.Maintain constant speed while com-muting and coast whenever possible.
2. Maintain constant speed.
.Look ahead to try and anticipate and minimize stops.
.Synchronizing your speed with traffic
lights allows you to reduce your
number of stops.
.Maintaining a steady speed can mini-mize red light stops and improve fuel
efficiency.
3. Use air conditioning (A/C) at higher vehicle speeds.
.Below 40 MPH (64 km/h), it is moreefficient to open windows to cool the
vehicle due to reduced engine load.
.Above 40 MPH (64 km/h), it is moreefficient to use A/C to cool the
vehicle due to increased aerodynamic
drag.
.Recirculating the cool air in the cabinwhen the A/C is on reduces cooling
load. 4. Drive at economical speeds and dis-
tances.
.Observing the speed limit and notexceeding 60 MPH (97 km/h) (where
legally allowed) can improve fuel
efficiency due to reduced aerody-
namic drag.
.Maintaining a safe following distance
behind other vehicles reduces unne-
cessary braking.
.Safely monitoring traffic to anticipatechanges in speed permits reduced
braking and smooth acceleration
changes.
.Select a gear range suitable to roadconditions.
5. Use cruise control.
.Using cruise control during highway driving helps maintain a steady speed.
.Cruise control is particularly effectivein providing fuel savings when driving
on flat terrains.
6. Plan for the shortest route.
.Utilize a map or navigation system to determine the best route to save time.
7. Avoid idling.
.Shutting off your engine when safe for stops exceeding 30-60 seconds
saves fuel and reduces emissions. 8. Buy an automated pass for toll roads.
.Automated passes permit drivers to
use special lanes to maintain cruising
speed through the toll and avoid
stopping and starting.
9. Winter warm up.
.Limit idling time to minimize impact to fuel economy.
.Vehicles typically need no more than30 seconds of idling at start-up to
effectively circulate the engine oil
before driving.
.Your vehicle will reach its ideal oper-ating temperature more quickly while
driving versus idling.
10. Keeping your vehicle cool.
.Park your vehicle in a covered parking area or in the shade whenever possi-
ble.
.When entering a hot vehicle, openingthe windows will help to reduce the
inside temperature faster, resulting in
reduced demand on your A/C system.
Starting and driving5-115
FUEL EFFICIENT DRIVING TIPS

SIC4455
VEHICLE DYNAMIC CONTROL
(VDC) OFF SWITCH
The vehicle should be driven with the Vehicle
Dynamic Control (VDC) system ON for most
driving conditions.
When the vehicle is stuck in mud or snow,
the VDC system reduces the engine output
to reduce wheel spin. The engine speed will
be reduced even if the accelerator is de-
pressed to the floor. If maximum engine
power is needed to free a stuck vehicle, turn
the VDC system off.
To turn off the Vehicle Dynamic Control
(VDC) system, push the VDC OFF switch.
The VDC off indicator light
will illumi-nate.
Push the VDC OFF switch again or restart
the engine to turn ON the system.
FREEING A FROZEN DOOR LOCK
To prevent a door lock from freezing, apply
deicer through the key hole. If the lock
becomes frozen, heat the key before insert-
ing it into the key hole or use the Intelligent
Key system.
ANTIFREEZE
In the winter when it is anticipated that the
outside temperature will drop below 32°F
(0°C), check antifreeze to assure proper
winter protection. For additional informa-
tion, see “Engine cooling system” (P.8-4).
BATTERY
If the battery is not fully charged during
extremely cold weather conditions, the bat-
tery fluid may freeze and damage the
battery. To maintain maximum efficiency,
the battery should be checked regularly. For
additional information, see “Battery” (P.8-
11).
DRAINING OF COOLANT WATER
If the vehicle is to be left outside without
antifreeze, drain the cooling system, includ-
ing the engine block. Refill before operating
the vehicle. For details, see “Engine cooling
system” (P.8-4).
Starting and driving5-137
COLD WEATHER DRIVING

6-12In case of emergency
industrial safety spectacles) and re-
move rings, metal bands, or any other
jewelry. Do not lean over the battery
when jump starting.
. Do not attempt to jump start a
frozen battery. It could explode and
cause serious injury.
. Your vehicle has an automatic engine
cooling fan. It could come on at any
time. Keep hands and other objects
away from it.
JVE0495X
WARNING
Always follow the instructions below.
Failure to do so could result in damage to
the charging system and cause personal
injury.
1. Remove the engine compartment cover, if necessary. See “Engine compartment
check locations” (P.8-3).
2. If the booster battery is in another vehicle
, position the two vehicles (and) to bring their batteries into close
proximity to each other. Do not allow the two vehicles to touch.
3. Apply parking brake. Move the shift lever to the P (Park) position. Switch off all
unnecessary electrical systems (light,
heater, air conditioner, etc.).
4. Remove vent caps on the battery (if so equipped). Cover the battery with a
firmly wrung out moist cloth
to reduce
explosion hazard.
5. Connect jumper cables in the sequence as illustrated (
???).

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

6-18In case of emergency
JVE0433X
Front
JVE0434X
Rear
VEHICLE RECOVERY (freeing a
stuck vehicle)
WARNING
.Stand clear of a stuck vehicle.
. Do not spin your tires at high speed.
This could cause them to explode and
result in serious injury. Parts of your
vehicle could also overheat and be
damaged.
Pulling a stuck vehicle
If your vehicle is stuck in sand, snow, mud,
etc., use a tow strap or other device
designed specifically for vehicle recovery.
Always follow the manufacturer’s instruc-
tions for the recovery device.
Attach the tow strap to the towing hook.
CAUTION
.Tow chains or cables must be at-
tached only to the main structural
members of the vehicle or the towing
hooks. Otherwise, the vehicle body
will be damaged. .
Use the towing hook only to free a
vehicle stuck in sand, snow, mud, etc.
Never tow the vehicle for a long
distance using only the towing hook.
. The towing hook is under tremendous
force when used to free a stuck
vehicle. Never pull the hook at an
angle.
. Always pull the cable straight out
from the front or rear of the vehicle.
. Pulling devices should be routed so
they do not touch any part of the
suspension, steering, brake or cooling
systems.
. Pulling devices such as ropes or
canvas straps are not recommended
for use in vehicle towing or recovery.
Rocking a stuck vehicle
If your vehicle is stuck in sand, snow, mud,
etc., use the following procedure:
1. Turn off the Vehicle Dynamic Control
(VDC) system.
2. Make sure the area in front and behind the vehicle is clear of obstructions.
3. Turn the steering wheel right and left to clear an area around the front tires.
4. Slowly rock the vehicle forward and backward.

8 Do-it-yourself
Maintenance precautions ............................................... 8-2
Engine compartment check locations ......................... 8-3VK56VD engine model .............................................. 8-3
Engine cooling system ..................................................... 8-4 Checking engine coolant level ................................. 8-5
Changing engine coolant .......................................... 8-5
Engine oil ........................................................................\
..... 8-6 Checking engine oil level ........................................... 8-6
Changing engine oil and filter .................................. 8-6
Automatic Transmission Fluid (ATF) .......................... 8-8
Power steering fluid ......................................................... 8-8
Brake fluid ........................................................................\
... 8-9 Brake fluid ..................................................................... 8-9
Window washer fluid ................................................... 8-10
Battery ........................................................................\
....... 8-11 Jump starting ............................................................. 8-12
Variable voltage control system ................................. 8-13
Drive belts ........................................................................\
. 8-13
Spark plugs ....................................................................... 8-14 Replacing spark plugs .............................................. 8-14
Air cleaner ........................................................................\
. 8-14 Windshield wiper blades .............................................. 8-15
Cleaning ..................................................................... 8-15
Replacing ................................................................... 8-16
Rear window wiper blades .......................................... 8-16
Brakes ........................................................................\
........ 8-17 Self-adjusting brakes ............................................. 8-17
Brake pad wear warning ....................................... 8-17
Brake booster ........................................................... 8-17
Fuses ........................................................................\
.......... 8-18 Engine compartment .............................................. 8-18
Passenger compartment ...................................... 8-20
Intelligent Key battery replacement ......................... 8-21
Lights ........................................................................\
......... 8-23
Headlights ................................................................ 8-24
Exterior and interior lights ................................... 8-24
Wheels and tires ............................................................. 8-27
Tire pressure ............................................................. 8-27
Tire labeling .............................................................. 8-31
Types of tires .......................................................... 8-34
Tire chains ................................................................. 8-35
Changing wheels and tires ................................... 8-35