INFINITI QX80 2018 Owners Manual

10-18Technical and consumer information
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.10-21). 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.
STI0541
The GCWR equals the combined weight of
the towing vehicle (including passengers and
cargo) plus the total trailer load. Towing
loads greater than these or using improper
towing equipment could adversely affect
vehicle handling, braking and performance.
The ability of your vehicle to tow a trailer is
not only related to the maximum trailer
loads, but also the places you plan to tow.
Tow weights appropriate for level highway
driving may have to be reduced on very steep
grades or for low traction situations (for
example, on slippery boat ramps).
Temperature conditions can also affect
towing. For example, towing a heavy trailer
in high outside temperatures on graded
TOWING A TRAILER

roads can affect engine performance and
cause overheating. The transmission high
fluid temperature and engine protection
mode, which helps reduce the chance of
transmission and engine damage, could
activate and automatically decrease engine
power. Vehicle speed may decrease under
high load. Plan your trip carefully to account
for trailer and vehicle load, weather and road
conditions.
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
Vehicle damage resulting from improper
towing procedures is not covered by
INFINITI warranties.
STI0542
Tongue load
When using a weight carrying or a weight
distributing hitch, keep the tongue load
between 10 to 15% of the total trailer load
or use the trailer tongue load specified by the
trailer manufacturer. The tongue load must
be within the maximum tongue load limits
shown in the following “Towing Load/
Specification” chart. If the tongue load
becomes excessive, rearrange cargo to allow
for proper tongue load.
TI1012M
MAXIMUM GROSS VEHICLE
WEIGHT (GVW)/MAXIMUM
GROSS AXLE WEIGHT (GAW)
The GVW of the towing vehicle must not
exceed the Gross Vehicle Weight Rating
(GVWR) shown on the F.M.V.S.S./C.M.V.S.
S. certification label. The GVW equals the
combined weight of the unloaded vehicle,
passengers, luggage, hitch, trailer tongue
load and any other optional equipment. In
addition, front or rear GAW must not exceed
the Gross Axle Weight Rating (GAWR)
shown on the F.M.V.S.S./C.M.V.S.S. certifi-
cation label.
Towing capacities are calculated assuming a
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10-20Technical and consumer information
base vehicle with driver and any options
required to achieve the rating. Additional
passengers, cargo and/or optional equip-
ment, such as the trailer hitch, will add
weight to the vehicle and reduce your
vehicle’s maximum towing capacity and
trailer tongue load.
The vehicle and trailer need to be weighed to
confirm the vehicle is within the GVWR,
Front GAWR, Rear GAWR, Gross Combined
Weight Rating (GCWR) and Towing capa-
city.
All vehicle and trailer weights can be mea-
sured using platform type scales commonly
found at truck stops, highway weigh sta-
tions, building supply centers or salvage
yards.
To determine the available payload capacity
for tongue/king pin load, use the following
procedure.
1. Locate the GVWR on the F.M.V.S.S./C.M.V.S.S. certification label.
2. Weigh your vehicle on the scale with all of the passengers and cargo that are
normally in the vehicle when towing a
trailer.
3. Subtract the actual vehicle weight from the GVWR. The remaining amount is the
available maximum tongue/king pin
load. To determine the available towing capacity,
use the following procedure.
1. Find the GCWR for your vehicle on the
“Towing Load/Specification” chart
found later in this section.
2. Subtract the actual vehicle weight from the GCWR. The remaining amount is the
available maximum towing capacity.
To determine the Gross Trailer Weight,
weigh your trailer on a scale with all
equipment and cargo, that are normally in
the trailer when it is towed. Make sure the
Gross trailer weight is not more than the
Gross Trailer Weight Rating shown on the
trailer and is not more than the calculated
available maximum towing capacity.
Also weigh the front and rear axles on the
scale to make sure the Front Gross Axle
Weight and Rear Gross Axle Weight are not
more than Front Gross Axle Weight and
Rear Gross Axle Weight on the F.M.V.S.S./
C.M.V.S.S. certification label. The cargo in
the trailer and vehicle may need to be moved
or removed to meet the specified ratings.
Example:
. Gross Vehicle Weight (GVW) as weighed
on a scale - including passengers, cargo
and hitch - 6,450 lb. (2,926 kg).
. Gross Vehicle Weight Rating (GVWR)
from F.M.V.S.S./C.M.V.S.S. certification
label - 7,300 lb. (3,311 kg). .
Gross Combined Weight Rating (GCWR)
from “Towing Load/Specification” chart
- 14,300 lb. (6,486 kg).
. Maximum Trailer towing capacity from
“Towing Load/Specification” chart -
8,500 lb. (3,856 kg).
7,300 lb. (3,311 kg) GVWR
− 6,450 lb. (2,926 kg) GVW
= 850 lb. (385 kg) Available for tongue
weight
14,300 lb. (6,486 kg) GCWR
− 6,450 lb. (2,926 kg) GVW
= 7,850 lb. (3,560 kg) Capacity available for
towing
850 lb. (385 kg) / Available tongue weight
7,850 lb. (3,560 kg) Available capacity
= 11 % tongue weight
The available towing capacity may be less
than the maximum towing capacity due to
the passenger and cargo load in the vehicle.
Remember to keep trailer tongue weight
between 10 - 15% of the trailer weight or
within the trailer tongue load specification
recommended by the trailer manufacturer. If
the tongue load becomes excessive, rear-
range the cargo to obtain the proper tongue
load. Do not exceed the maximum tongue

weight specification shown in the “Towing
load/specification” chart even if the calcu-
lated available tongue weight is greater than
15%. If the calculated tongue weight is less
than 10%, reduce the total trailer weight to
match the available tongue weight.
Always verify that available capacities are
within the required ratings.TOWING LOAD/SPECIFICATION
WARNING
The towing capacities provided in this
manual are for general reference only.
The safe towing capacity of your vehicle
is affected by retailer and factory in-
stalled options and passenger and cargo
loads. You must weigh the vehicle and
trailer as described in this manual to
determine the actual vehicle towing
capacity. Do not exceed the published
maximum towing capacity, or the GCWR
or the GVWR shown on the F.M.V.S.S./
C.M.V.S.S. certification label. Doing so
can result in an accident causing serious
personal injury or property damage.
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10-22Technical and consumer information
TOWING LOAD/SPECIFICATION CHARTUnit: lb (kg)
US Canada
Two-Wheel Drive (2WD) model Four-Wheel Drive
(4WD) model Four-Wheel Drive
(4WD) model
MAXIMUM TOWING CAPA-
CITY*1, *2 8,500 (3,856)
8,500 (3,856)
MAXIMUM TONGUE LOAD 850 (385)850 (385)
GROSS COMBINED WEIGHT
RATING 14,300 (6,486) 14,480 (6,568) 14,480 (6,568)
1: The towing capacity values are calculated assuming a base vehicle with driver and any
options required to achieve the rating. Additional passengers, cargo and/or optional
equipment will add weight to the vehicle and reduce your vehicle’s maximum towing
capacity.
2: Use of a weight-distributing hitch system is recommended when towing over 5,000 lb (2,267 kg).
TOWING SAFETY
Trailer hitch
Your vehicle is equipped with a trailer tow
package. The trailer tow package includes a
receiver-type frame mounted hitch. This
hitch is rated for the maximum towing
capacity of this vehicle when the proper
towing equipment is used. Choose a proper
ball mount and hitch ball that is rated for the
trailer to be towed. Genuine INFINITI ball
mounts and hitch balls are available from an
INFINITI retailer.

JVT0542X
To access the trailer hitch, remove the
trailer hitch cover located on the lower part
of the rear bumper.
To remove the trailer hitch cover:
1. Remove the 2 clips by turning them counterclockwise. 2. Pull the bottom of the cover straight
backward to remove the inner side and
upper clips.
JVT0544X
To install the trailer hitch cover:
1. Insert the upper clips into the recesses
,
and then push the cover to its original
position.
2. Install the 2 clips
by pushing them in as
illustrated.
WARNING
Trailer hitch components have specific
weight ratings. Your vehicle may be
capable of towing a trailer heavier than
the weight rating of the hitch compo-
nents. Never exceed the weight rating of
the hitch components. Doing so can
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10-24Technical and consumer information
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

measured reference height when loaded,
the vehicle may handle unpredictably
which could cause a loss of vehicle
control and cause serious personal injury
or property damage.
Sway control device
Sudden maneuvers, wind gusts and buffet-
ing caused by other vehicles can affect
trailer handling. Sway control devices may
be used to help control these affects. If you
choose to use one, contact a reputable
trailer hitch supplier to make sure the sway
control device will work with the vehicle,
hitch, trailer and the trailer’s brake system.
Follow the instructions provided by the
manufacturer for installing and using the
sway control device.
Class I hitch
Class I trailer hitch equipment (receiver, ball
mount and hitch ball) can be used to tow
trailers of a maximum weight of 2,000 lb
(907 kg).
Class II hitch
Class II trailer hitch equipment (receiver, ball
mount and hitch ball) can be used to tow
trailers of a maximum weight of 3,500 lb
(1,588 kg).
Class III hitch
Class III trailer hitch equipment (receiver, ball
mount and hitch ball) can be used to tow
trailers of a maximum weight of 5,000 lb
(2,267 kg).
Class IV hitch
Class IV trailer hitch equipment (receiver, ball
mount and hitch ball) can be used to tow
trailers of a maximum weight of 10,000 lb
(4,545 kg). A weight distributing hitch
should be used to tow trailers that weigh
over 5,000 lb (2,267 kg).
Your vehicle may be equipped with Class IV
trailer hitch equipment that has a 10,000 lb
(4,545 kg) maximum weight rating, but your
vehicle is only capable of towing the max-
imum trailer weights shown in the “Towing
Load/Specification” chart earlier in this
section.
CAUTION
.Do not use axle-mounted hitches.
. Do not modify the vehicle exhaust
system, brake system, etc.
. Do not attach any additional hitches
to your vehicle because a hitch is
already mounted to your vehicle frame.
Tire pressures
.
When towing a trailer, inflate the
vehicle tires to the recommended
cold tire pressure indicated on the
Tire and Loading Information la-
bel.
. Trailer tire condition, size, load
rating and proper inflation pres-
sure should be in accordance with
the trailer and tire manufacturers’
specifications.
Safety chains
Always use a suitable chain between your
vehicle and the trailer. The safety chains
should be crossed and should be attached to
the hitch, not to the vehicle bumper or axle.
Be sure to leave enough slack in the chains to
permit turning corners.
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10-26Technical and consumer information
STI0745
Trailer lights
Your vehicle is equipped with a towing
package, which also includes the 7-pin trailer
harness connector located under the trailer
hitch cover on the rear bumper.
CAUTION
.When splicing into the vehicle elec-
trical system, a commercially avail-
able power-type module/converter
must be used to provide power for
all trailer lighting. This unit uses the
vehicle battery as a direct power
source for all trailer lights while using the vehicle tail light, stoplight and
turn signal circuits as a signal source.
The module/converter must draw no
more than 15 milliamps from the stop
and tail lamp circuits. Using a mod-
ule/converter that exceeds these
power requirements may damage
the vehicle’s electrical system. See a
reputable trailer retailer to obtain the
proper equipment and to have it
installed.
. Do not connect electrical devices that
draw more than 40 amps to the
vehicle. The fusible link may melt.
Trailer lights should comply with federal
and/or local regulations. For assistance in
hooking up trailer lights, contact an INFINITI
retailer or reputable trailer retailer.
Trailer brakes
When towing a trailer load of 3,500 lbs.
(1,587 kg) or more, trailers with a brake
system MUST be used. However, most
states require a separate braking system on
trailers with a loaded weight above a
specific amount. Make sure the trailer meets
the local regulations and the regulations
where you plan to tow.
Several types of braking systems are avail-
able. Surge Brakes -
The surge brake actuator is
mounted on the trailer tongue with a
hydraulic line running to each trailer wheel.
Surge brakes are activated by the trailer
pushing against the hitch ball when the tow
vehicle is braking. Hydraulic surge brakes are
common on rental trailers and some boat
trailers. In this type of system, there is no
hydraulic or electric connection for brake
operation between the tow vehicle and the
trailer.
Electric Trailer Brakes - Electric braking
systems are activated by an electronic signal
sent from a trailer brake controller (special
brake sensing module).
Have a professional supplier of towing
equipment make sure the trailer brakes are
properly installed and demonstrate proper
brake function testing.WARNING
Never connect a trailer brake system
directly to the vehicle brake system.
Pre-towing tips
. Be certain your vehicle maintains a level
position when a loaded or unloaded
trailer is hitched. Do not drive the vehicle
if it has an abnormal nose-up or nose-

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.
Technical and consumer information10-27