ECU INFINITI QX80 2021 Manual Online

ures caused by overloading are
not covered by the vehicle’s
warranty.
MEASUREMENT OF WEIGHTS
Secure loose items to prevent weight
shifts that could affect the balance of
your vehicle. When the vehicle is
loaded, drive to a scale and weigh
the front and the rear wheels sepa-
rately to determine axle loads. Indivi-
dual axle loads should not exceed
either of the gross axle weight ratings
(GAWR). The total of the axle loads
should not exceed the gross vehicle
weight rating (GVWR). These ratings
are given on the vehicle certification
label. If weight ratings are exceeded,
move or remove items to bring all
weights below the ratings.
WARNING
Overloading or improper loading of a
trailer and its cargo can adversely affect
vehicle handling, braking and perfor-
mance and may lead to accidents.
CAUTION
.Do not tow a trailer or haul a heavy
load for the first 500 miles (800 km).
Your engine, axle or other parts could
be damaged.
. For the first 500 miles (800 km) that
you tow a trailer, do not drive over
50 MPH (80 km/h) and do not make
starts at full throttle. This helps the
engine and other parts of your vehicle
wear in at the heavier loads.
Your new vehicle was designed to be used
primarily to carry passengers and cargo.
Remember that towing a trailer places
additional loads on your vehicle’s engine,
drivetrain, steering, braking and other sys-
tems.
An INFINITI Towing Guide (U.S. only) is
available on the website at www.InfinitiUSA.com. This guide includes
information on trailer towing capability and
the special equipment required for proper
towing.
MAXIMUM LOAD LIMITS
Maximum trailer loads
Never allow the total trailer load to exceed
the value specified in the “Towing load/
specification” (P.10-22). The total trailer
load equals trailer weight plus its cargo
weight.
.
When towing a trailer load of 3,500 lbs
(1,587 kg) or more, trailers with a brake
system MUST be used.
The maximum Gross Combined Weight
Rating (GCWR) should not exceed the value
specified in the following “Towing Load/
Specification” chart.
Technical and consumer information10-19
TOWING A TRAILER

cause serious personal injury or property
damage.
Hitch ball
Choose a hitch ball of the proper size and
weight rating for your trailer:
.The required hitch ball size is stamped on
most trailer couplers. Most hitch balls
also have the size printed on top of the
ball.
. Choose the proper class hitch ball based
on the trailer weight.
. The diameter of the threaded shank of
the hitch ball must be matched to the ball
mount hole diameter. The hitch ball
shank should be no more than 1/16”
smaller than the hole in the ball mount.
. The threaded shank of the hitch ball must
be long enough to be properly secured to
the ball mount. There should be at least 2
threads showing beyond the lock washer
and nut.
Ball mount
The hitch ball is attached to the ball mount
and the ball mount is inserted into the hitch
receiver. Choose a proper class ball mount
based on the trailer weight. Additionally, the
ball mount should be chosen to keep the
trailer tongue level with the ground.
Weight carrying hitches
A weight carrying or “dead weight” ball
mount is one that is designed to carry the
whole amount of tongue weight and gross
weight directly on the ball mount and on the
receiver.
Weight distribution hitch
This type of hitch is also called a “load-
leveling” or “equalizing” hitch. A set of bars
attach to the ball mount and to the trailer to
distribute the tongue weight (hitch weight)
of your trailer. Many vehicles cannot carry
the full tongue weight of a given trailer, and
need some of the tongue weight transferred
through the frame and pushing down on the
front wheels. This gives stability to the tow
vehicle.
A weight-distributing hitch system (Class IV)
is recommended if you plan to tow trailers
with a maximum weight over 5,000 lbs
(2,267 kg). Check with the trailer and towing
equipment manufacturers to determine if
they recommend the use of a weight-
distributing hitch system.
NOTE:
A weight-distributing hitch system may
affect the operation of trailer surge brakes.
If you are considering use of a weight-
distributing hitch system with a surge brake-equipped trailer, check with the
surge brake, hitch or trailer manufacturer
to determine if and how this can be done.
Follow the instructions provided by the
manufacturer for installing and using the
weight-distributing hitch system.
General set-up instructions are as follows:
1. Park unloaded vehicle on a level surface.
With the ignition switch in the ON
position and the doors closed, allow the
vehicle to stand for several minutes so
that it can level.
2. Measure the height of a reference point on the front and rear bumpers at the
center of the vehicle.
3. Attach the trailer to the vehicle and adjust the hitch equalizers so that the
front bumper height is within 0 - .5
inches (0 - 13 mm) of the reference
height measured in step 2. The rear
bumper should be no higher than the
reference height measured in step 2.
WARNING
Properly adjust the weight distributing
hitch so the rear of the bumper is no
higher than the measured reference
height when the trailer is attached. If
the rear bumper is higher than the
Technical and consumer information10-25

10-28Technical and consumer information
down condition; check for improper
tongue load, overload, worn suspension
or other possible causes of either condi-
tion.
. Always secure items in the trailer to
prevent load shift while driving.
. Keep the cargo load as low as possible in
the trailer to keep the trailer center of
gravity low.
. Load the trailer so approximately 60% of
the trailer load is in the front half and
40% is in the back half. Also make sure
the load is balanced side to side.
. Check your hitch, trailer tire pressure,
vehicle tire pressure, trailer light opera-
tion, and trailer wheel lug nuts every time
you attach a trailer to the vehicle.
. Be certain your rearview mirrors conform
to all federal, state or local regulations. If
not, install any mirrors required for
towing before driving the vehicle.
. Determine the overall height of the
vehicle and trailer so the required clear-
ance is known.
Trailer towing tips
In order to gain skill and an understanding of
the vehicle’s behavior, you should practice
turning, stopping and backing up in an area
which is free from traffic. Steering stability,
and braking performance will be somewhat different than under normal driving condi-
tions.
.
Always secure items in the trailer to
prevent load shift while driving.
. Lock the trailer hitch coupler with a pin or
lock to prevent the coupler from inad-
vertently becoming unlatched.
. Avoid abrupt starts, acceleration or
stops.
. Avoid sharp turns or lane changes.
. Always drive your vehicle at a moderate
speed. Some states or provinces have
specific speed limits for vehicles that are
towing trailers. Obey the local speed
limits.
. When backing up, hold the bottom of the
steering wheel with one hand. Move
your hand in the direction in which you
want the trailer to go. Make small
corrections and back up slowly. If possi-
ble, have someone guide you when you
are backing up.
Always block the wheels on both vehicle and
trailer when parking. Parking on a slope is
not recommended; however, if you must do
so:
CAUTION
If you move the shift lever to the P
(Park) position before blocking the
wheels and applying the parking brake,
transmission damage could occur.
1. Apply and hold the brake pedal.
2. Have someone place blocks on the downhill side of the vehicle and trailer
wheels.
3. After the wheel blocks are in place, slowly release the brake pedal until the
blocks absorb the vehicle load.
4. Apply the parking brake.
5. Shift the transmission into P (Park).
6. Four-Wheel Drive (4WD) models:
Make sure that the 4WD shift switch is
engaged in the AUTO, 4HI or 4LO
position and the Automatic Transmission
(AT) park warning light is turned off.
7. Turn off the engine.
To drive away:
1. Apply and hold the brake pedal.
2. Start the engine.
3. Shift the transmission into gear.

10-34Technical and consumer information
wwwapps.tc.gc.ca/Saf-Sec-Sur/7/
PCDB-BDPP/fc-cp.aspx?lang=fra
(French speakers).
Additional information concerning
motor vehicle safety may be obtained
from Transport Canada’s Road
Safety Information Centre at 1-
800-333-0371 or online at www.tc.
gc.ca/roadsafety (English speakers)
or www.tc.gc.ca/securiteroutiere
(French speakers).
To notify INFINITI of any safety
concerns please contact our Consu-
mer Information Centre toll free at 1-
800-361-4792.
WARNING
A vehicle equipped with Four-Wheel
Drive (4WD) should never be tested
using a two wheel dynamometer (such
as the dynamometers used by some
states for emissions testing), or similar
equipment. Make sure you inform test
facility personnel that your vehicle is
equipped with 4WD before it is placed
on a dynamometer. Using the wrong test
equipment may result in transmission
damage or unexpected vehicle move-
ment which could result in serious vehicle
damage or personal injury.
Due to legal requirements in some states and
Canadian Provinces, your vehicle may be
required to be in what is called the “ready
condition” for an Inspection/Maintenance
(I/M) test of the emission control system.
The vehicle is set to the “ready condition”
when it is driven through certain driving
patterns. Usually, the “ready condition” can
be obtained by ordinary usage of the vehicle.
If a powertrain system component is re-
paired or the battery is disconnected, the
vehicle may be reset to a “not ready condi-
tion”. Before taking the I/M test, check the
vehicle’s inspection/maintenance test readi- ness condition. Place the ignition switch in
the ON position without starting the engine.
If the Malfunction Indicator Light (MIL)
comes on steady for 20 seconds and then
blinks for 10 seconds, the I/M test condition
is “not ready”. If the MIL does not blink after
20 seconds, the I/M test condition is
“ready”.
It is recommended you visit an INFINITI
retailer to set “ready condition” or to prepare
the vehicle for testing.
READINESS FOR INSPECTION/
MAINTENANCE (I/M) TEST

11 Index
A
ABS (Anti-lock Braking System) ................... 5-124
Adaptive front lighting system (AFS) ............ 2-45
Advanced air bag system .................................. 1-58
Aiming controlAdaptive front lighting system (AFS) ...... 2-45
Headlights ....................................................... 2-44
Air bag system
Advanced air bag system ............................ 1-58
Front passenger air bag and
status light ....................................................... 1-60
Front-seat mounted side-impact
supplemental air bag system ..................... 1-65
Roof-mounted curtain side-impact and
rollover supplemental air bag system ...... 1-65
Air bag warning labels ....................................... 1-68
Air bag warning light .............................. 1-69, 2-14
Air cleaner housing filter ................................... 8-14
Air conditioner Air conditioner service ................................. 4-37
Air conditioner specification label ......... 10-13
Air conditioning system refrigerant
and oil recommendations ................ 4-37, 10-7
Automatic air conditioner ........................... 4-29
Automatic climate control ......................... 4-28
DUAL mode setting ...................................... 4-32
In-cabin microfilter ........................................ 4-36
Alarm, How to stop alarm (see vehicle
security system) ................................................... 2-35 Alcohol, drugs and driving ................................ 5-10
Antenna .................................................................. 4-37
Anti-lock Braking System (ABS) ................... 5-124
Anti-lock braking system (ABS)
warning light ......................................................... 2-15
Appearance care
Exterior appearance care ............................... 7-2
Interior appearance care ................................ 7-5
Armrest ................................................................... 1-10
Around View
®Monitor ........................................ 4-3
Audible reminders ................................................ 2-19
Auto closure .......................................................... 3-25
Autolight system .................................................. 2-40
Automatic
Automatic air conditioner ........................... 4-29
Automatic Transmission Fluid (ATF) ......... 8-8
Climate control .............................................. 4-28
Door locks .......................................................... 3-6
Drive positioner ............................................. 3-40
Driving with automatic transmission ....... 5-18
Seat positioner .............................................. 3-40
Average speed ...................................................... 2-31
Avoiding collision and rollover ........................... 5-8
B
Back door (See liftgate) ..................................... 3-22
Back-up Collision Intervention
(BCI) system .......................................................... 5-53 Battery .................................................................... 8-11
Battery saver system ........................ 2-44, 2-72
Intelligent Key ................................................. 8-21
Variable voltage control system ............... 8-13
Before starting the engine ................................ 5-15
Belts (See drive belts) ......................................... 8-13
Blind Spot Intervention
®(BSI) system .......... 5-41
Blind Spot Warning (BSW) system ................ 5-31
Booster seats ........................................................ 1-48
Brake
Anti-lock Braking System (ABS) ............ 5-124
Brake booster ................................................. 8-17
Brake fluid ......................................................... 8-9
Brake system ................................................ 5-123
Parking brake operation .............................. 5-22
Warning light .................................................. 2-12
Break-in schedule .............................................. 5-111
Brightness control Instrument panel ............................................ 2-46
Bulb check/instrument panel ........................... 2-12
Bulb replacement ................................................. 8-23
C
Cabin air filter ....................................................... 4-36
Camera aiding sonar function ......................... 4-17
Capacities and
recommended fluids/lubricants ....................... 10-2
Car phone or CB radio ....................................... 4-38
Cargo floor box .................................................... 2-66

11-6
Rollover .................................................................... 5-8
RoofMoonroof ......................................................... 2-71
Roof rack ......................................................... 2-67
S
SafetyChild seat belts ............................................... 1-29
Towing safety .............................................. 10-23
Seat adjustment Front power seat adjustment ...................... 1-4
Front seats ............................................. 1-4, 1-10
Seat belt(s) Child safety ..................................................... 1-29
Infants ............................................................... 1-30
Injured persons ............................................... 1-21
Larger children ............................................... 1-30
Precautions on seat belt usage ................. 1-18
Pregnant women ........................................... 1-21
Seat belt cleaning ............................................. 7-7
Seat belt extenders ....................................... 1-28
Seat belt maintenance ................................. 1-28
Seat belt warning light and chime ............ 2-14
Seat belts ......................................................... 1-18
Seat belts with pretensioners .................... 1-67
Small children .................................................. 1-30
Three-point type ............................................ 1-21
Seat(s) Climate controlled seats ............................. 2-50
Driver-side memory ..................................... 3-40
Heated seats .................................................. 2-48 Seats .................................................................... 1-3
Security system (INFINITI Vehicle
Immobilizer System), Engine start .................. 2-35
Security system, Vehicle security system ..... 2-34
Servicing climate control ................................... 4-37
Setting memory function, Automatic
drive positioner .................................................... 3-41
Shift lever, Shift lock release ............................ 5-21
Shift lock release Transmission ................................................... 5-21
Shifting, Automatic transmission .................... 5-18
Side ventilators .................................................... 4-27
Smart Rearview Mirror ...................................... 3-31
SNOW mode ....................................................... 5-122
Snow mode switch .............................................. 2-52
Spare tire ................................................... 8-37, 10-9
Spark plugs ............................................................ 8-14
Speedometer ............................................................ 2-7
Standard maintenance .......................................... 9-7
Starting Before starting the engine .......................... 5-15
Jump starting .................................................. 6-11
Precautions when starting and driving ..... 5-4
Push starting ................................................... 6-13
Starting the engine ....................................... 5-15
Status light, Front passenger air bag ............ 1-60
Steering Heated steering wheel ................................. 2-47
Power steering fluid ....................................... 8-8
Power steering system .............................. 5-123
Tilt/telescopic steering ................................ 3-29 Storage ................................................................... 2-60
Sun visors ............................................................... 3-30
Sunglasses holder ................................................ 2-62
Supplemental air bag warning labels ............. 1-68
Supplemental air bag warning light ... 1-69, 2-14
Supplemental restraint system ........................ 1-52
Precautions on supplemental
restraint system ............................................. 1-52
Switch
Autolight switch ............................................ 2-40
Fog light switch ............................................. 2-47
Hazard warning flasher switch .................... 6-2
Headlight aiming control ............................ 2-44
Headlight switch ........................................... 2-40
Ignition switch ................................................ 5-18
Power door lock switch ................................. 3-5
Snow mode switch ........................................ 2-52
Turn signal switch ......................................... 2-46
Vehicle dynamic control (VDC)
off switch ......................................................... 2-53
T
Tachometer ............................................................. 2-8
Temperature gauge, Engine coolant
temperature gauge ............................................... 2-8
Theft (INFINITI Vehicle Immobilizer System),
Engine start ........................................................... 2-35
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 ............................. 8-28, 10-13
Tire chains ....................................................... 8-34
Tire dressing ...................................................... 7-4
Tire pressure ................................................... 8-27
Tire pressure monitoring
system (TPMS) ........................................ 5-5, 6-3
Tire rotation .................................................... 8-35
Types of tires .................................................. 8-33
Uniform tire quality grading .................... 10-31
Wheel/tire size ............................................... 10-9
Wheels and tires ............................................ 8-27
Top
Tether strap child restraints ....................... 1-36
TOW mode .......................................................... 5-122
TOW mode switch .............................................. 2-53
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 ....................... 2-75, 2-79
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 ....................................................... 2-31
Trip odometer ....................................................... 2-31
Turn signal switch ............................................... 2-46
U
Underbody cleaning ............................................... 7-3
Uniform tire quality grading ........................... 10-31
USB (Universal Serial Bus)
charging connector ............................................. 2-58
V
Vanity mirror ......................................................... 3-39
Vanity mirror lights ............................................. 2-74
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 .............................................. 2-34
Vehicle dynamic control (VDC)
off switch ......................................................... 2-53
Vehicle dynamic control
(VDC) system ................................................ 5-125
Vehicle dynamic control (VDC)
warning light ................................................... 2-18
Vehicle information display .............................. 2-20
Vehicle speed ........................................................ 2-31
Ventilators ............................................................. 4-27
Voltmeter ............................................................... 2-10
W
Warning Hazard warning flasher switch .................... 6-2
Loose Fuel Cap warning ............................. 2-25
Predictive Forward Collision
Warning (PFCW) ........................................ 5-103
Tire Pressure Low Add Air warning ........ 2-25
Tire pressure monitoring
system (TPMS) ........................................ 5-5, 6-3
Vehicle information display ........................ 2-20
Warning lights, indicator lights and
audible reminders .......................................... 2-11
Warning labels, Air bag warning labels ........ 1-68
Warning light 4WD warning light ..................................... 5-118
Air bag warning light ........................ 1-69, 2-14
Anti-lock braking system (ABS)
warning light ................................................... 2-15
Brake warning light ....................................... 2-12
11-7