Infiniti QX50 (2021 year). Manual in english — page 25

When the Active Trace Control is operated
and the “Chassis Control” mode is selected in
the vehicle information display, the Active
Trace Control graphics are shown in the ve-
hicle information display.

If the chassis control warning message ap-
pears in the vehicle information display, it
may indicate that the Active Trace Control is
not functioning properly. Have the system
checked as soon as possible by an INFINITI
dealer.

WARNING

The Active Trace Control may not be effec-
tive depending on the driving condition. Al-
ways drive carefully and attentively.

When the Active Trace Control is operating,
you may feel a pulsation in the brake pedal
and hear a noise. This is normal and indicates
that the Active Trace Control is operating
properly.

You may also feel deceleration when the Ac-
tive Trace Control is operating. However, this
is not a malfunction.

Even if the Active Trace Control is set to OFF,
some functions will remain on to assist the
driver (for example: avoidance scenes).

ACTIVE ENGINE BRAKE

The Active Engine Brake function adds subtle
deceleration by controlling Continuously
Variable Transmission (CVT) gear ratio, de-
pending on the cornering condition calcu-
lated from the driver's steering input and plu-
ral sensors. This benefit is for easier
traceability and less workload of adjusting
speed with braking at corners.

The Active Engine Brake also enhances brak-
ing feel by adding subtle deceleration with
CVT gear ratio control according to the driv-
er's brake pedal operation

The Active Engine Brake can be set to on
(enabled) or off (disabled) through the lower
display “Drive Mode Selector” menu option.

LSD2185

Starting and driving

5-157

When the Active Engine Brake is operated at
corners and the “Chassis Control” mode is
selected in the vehicle information display,
the Active Engine Brake graphics are shown
in the vehicle information display.

If the chassis control warning message ap-
pears in the vehicle information display, it
may indicate that the Active Engine Brake is
not functioning properly. Have the system
checked as soon as possible. It is recom-
mended that you visit an INFINITI retailer for
this service.

WARNING

The Active Engine Brake may not be effec-
tive depending on the driving condition. Al-
ways drive carefully and attentively.

When the Active Engine Brake is operating,
the needle of the tachometer will rise up and
you may hear an engine noise. This is normal
and indicates that the Active Engine Brake is
operating properly.

You may also feel deceleration when the Ac-
tive Engine Brake is operating. However, this
is not a malfunction.

ACTIVE RIDE CONTROL

This system senses upper body motion
(based on wheel speed information) and con-
trols four wheel brake pressure. This will en-
hance ride comfort in an effort to restrain
uncomfortable upper body movement when
passing over undulated road surfaces.

When the lower display is used to turn off the
VDC system, the Active Ride Control is also
turned off.

When the Active Ride Control is operated
and the “Chassis Control” mode is selected in
the vehicle information display, the Active
Ride Control graphics are shown in the ve-
hicle information display.

LSD2185

5-158

Starting and driving

If the chassis control system error warning
message appears in the vehicle information
display, it may indicate that the Active Ride
Control is not functioning properly. Have the
system checked as soon as possible. It is rec-
ommended that you visit an INFINITI retailer
for this service.

When the Active Ride Control is operating,
you may hear noise and sense slight decel-
eration. This is normal and indicates that the
Active Ride Control is operating properly.

WARNING

•

Never rely solely on the hill start assist
system to prevent the vehicle from mov-
ing backward on a hill. Always drive
carefully and attentively. Depress the
brake pedal when the vehicle is stopped
on a steep hill. Be especially careful when
stopped on a hill on frozen or muddy
roads. Failure to prevent the vehicle
from rolling backwards may result in a
loss of control of the vehicle and possible
serious injury or death.

•

The hill start assist system is not de-
signed to hold the vehicle at a standstill
on a hill. Depress the brake pedal when
the vehicle is stopped on a steep hill. Fail-
ure to do so may cause the vehicle to roll
backwards and may result in a collision or
serious personal injury.

•

The hill start assist system may not pre-
vent the vehicle from rolling backwards
on a hill under all load or road conditions.
Always be prepared to depress the brake
pedal to prevent the vehicle from rolling
backwards. Failure to do so may result in
a collision or serious personal injury.

When the vehicle is stopped on a hill, the hill
start assist system automatically keeps the
brakes applied to help prevent the vehicle
from rolling backward in the time it takes the
driver to release the brake pedal and apply
the accelerator.

The hill start assist system will operate auto-
matically under the following conditions:
• The transmission is shifted to a forward or

reverse gear.

• The vehicle is stopped completely on a hill

by applying the brake. The maximum hold-
ing time is 2 seconds. After 2 seconds the
vehicle will begin to roll back and the hill
start assist system will stop operating
completely.

The hill start assist system will not operate
when the shift lever is placed in the N (Neu-
tral), the Park button is pressed to place the
vehicle in the P (Park) position or on a flat and
level road.

The Hill Start Assist function status can be
checked in the “Chassis Control” mode in the
vehicle information display. For additional in-
formation, see “Vehicle information display”
(P. 2-19).

LSD3922

HILL START ASSIST SYSTEM

Starting and driving

5-159

The sonar system sounds a tone to inform the
driver of obstacles near the bumper.

When the sonar system is turned on, the
sonar view will automatically appear in the
center display when the camera is activated.

WARNING

Failure to follow the warnings and instruc-
tions for proper use of the sonar system
could result in serious injury or death.

•

The sonar system is not a replacement
for proper driving procedures and is not
designed to prevent contact with ve-
hicles or objects.

•

The driver is always responsible for
safety during parking and other maneu-
vers. Always look around and check that
it is safe to do so before parking.

•

This function is designed as an aid to the
driver in detecting large stationary ob-
jects to help avoid damaging the vehicle.

If your vehicle sustains damage to the bumper
fascia, leaving it misaligned or bent, the sensing
zone may be altered causing inaccurate mea-
surement of obstacles or false alarm.

CAUTION

•

Excessive noise (such as audio system vol-
ume or an open vehicle window) will inter-
fere with the tone and it may not be heard.

•

Keep the sonar sensors (located on the
bumper fascias) free from snow, ice and
large accumulations of dirt. Do not clean
the sensors with sharp objects. If the
sensors are covered, the accuracy of the
sonar function will be diminished.

SYSTEM OPERATION

The system informs with a visual and audible
signal of front obstacles when the shift lever
is in the D (Drive) position and both front and
rear obstacles when the shift lever is in the R
(Reverse) position.

LSD3923

LSD2993

FRONT AND REAR SONAR SYSTEM
(if so equipped)

5-160

Starting and driving

Sonar Operation Table

FR Sensor

RR Sensor

Range

Sound Display Sound Display

P

x

†

x

†

R

o

o

o

o

N

x

†

x

†

D

o

o

x

†

o – Display/Beep when detect
† – Display on camera view
x – No Display and Beep

The system is deactivated at speeds above 6
mph (10 km/h). It is reactivated at lower
speeds.

The intermittent tone will stop after 3 sec-
onds when an obstacle is detected by only
the corner sensor and the distance does not
change. The tone will stop when the obstacle
get away from the vehicle.

When the object is detected, the indicator
(green) appears and blinks and the tone
sounds intermittently. When the vehicle
moves closer to the object, the color of the
indicator turns yellow and the rate of the
blinking increases. When the vehicle is very
close to the object, the indicator stops blink-
ing and turns red, and the tone sounds
continuously.

When the corner of the vehicle moves closer
to an object, the corner sonar indicator

O

A

appears. When the center of the vehicle
moves close to an object, the center sonar (if
so equipped) indicator

O

B

appears.

The system indicators

O

A

will appear when

the vehicle moves closer to an object.

LSD2136

LSD2137

Starting and driving

5-161

HOW TO ENABLE/DISABLE THE
SONAR SYSTEM

The system is automatically activated when
the ignition is in the ON position and the shift
lever is in the R (Reverse) position.

Perform the following steps to enable or dis-
able the sonar system:

Type A (if so equipped):

1. Press the MENU button below the lower

display screen.

2. Select “Settings.”

3. Select “Parking Sonar”

4. Select “Front” to turn the front sonar sen-

sors on or off.

• Select “Rear” to turn the rear sonar sensors

on or off.

LSD3577

Type A (if so equipped)

5-162

Starting and driving

Type B (if so equipped):

1. Press the MENU button below the lower

display screen.

2. Select “Settings.”

3. Select “Parking Sonar”

4. Select “Rear” to turn the Rear Sonar Sys-

tem on or off.

SONAR LIMITATIONS

WARNING

Listed below are the system limitations for
the sonar system. Failure to operate the
vehicle in accordance with these system
limitations could result in serious injury or
death.

•

Read and understand the limitations of
the sonar system as contained in this
section. Inclement weather may affect
the function of the sonar system; this
may include reduced performance or a
false activation.

•

The system is deactivated at speeds
above 6 mph (10 km/h). It is reactivated
at lower speeds.

LSD3578

Type B (if so equipped)

Starting and driving

5-163

•

Inclement weather or ultrasonic sources
such as an automatic car wash, a truck’s
compressed-air brakes or a pneumatic
drill may affect the function of the sys-
tem; this may include reduced perfor-
mance or a false activation.

•

The system is not designed to prevent
contact with small or moving objects. Al-
ways move slowly. The system will not
detect small objects below the bumper or
on the ground.

•

The system may not detect the following
objects: fluffy objects such as snow,
cloth, cotton, glass-wool, etc.; thin ob-
jects such as rope, wire and chain, etc.; or
wedge-shaped objects.

•

The system may not detect objects at
speeds above 3 mph (5 km/h) and may
not detect certain angular or moving
objects.

SYSTEM TEMPORARILY
UNAVAILABLE

When sonar blockage is detected, the system
will be deactivated automatically.

The system is not available until the condi-
tions no longer exist.

The sonar sensors may be blocked by tempo-
rary ambient conditions such as splashing
water, mist or fog. The blocked condition
may also be caused by objects such as ice,
frost or dirt obstructing the sonar sensors.

Action to take:

When the above conditions no longer exist,
the system will resume automatically.

SYSTEM MAINTENANCE

The sonar sensors are located on the front
and rear bumpers. Always keep the area near
the sonar sensors clean.

The sonar sensors may be blocked by tempo-
rary ambient conditions such as splashing
water, mist or fog.

The blocked condition may also be caused by
objects such as ice, frost or dirt obstructing
the sonar sensors.

Check for and remove objects obstructing
the area around the sonar sensors.

LSD2993

5-164

Starting and driving

Do not attach stickers (including transparent
material), install accessories or apply addi-
tional paint near the sonar sensors.

Do not strike or damage the area around the
sonar sensors. It is recommended that you
visit an INFINITI retailer if the area around
the sonar sensors is damaged due to a
collision.

FREEING A FROZEN DOOR LOCK

To prevent a door lock from freezing, apply
de-icer through the key hole. If the lock be-
comes frozen, heat the key before inserting it
into the key hole, or use the INFINITI Intelli-
gent Key.

ANTIFREEZE

In the winter when it is anticipated that the
temperature will drop below 32°F (0°C),
check the antifreeze to assure proper winter
protection. For additional information, see
“Engine cooling system” (P. 8-4).

BATTERY

If the battery is not fully charged during ex-
tremely cold weather conditions, the battery
fluid may freeze and damage the battery. To
maintain maximum efficiency, the battery
should be checked regularly. For additional
information, see “Battery” (P. 8-12).

DRAINING OF COOLANT WATER

If the vehicle is to be left outside without
antifreeze, drain the cooling system, including
the engine block. Refill before operating the
vehicle. For additional information, see
“Changing engine coolant” (P. 8-5).

TIRE EQUIPMENT

1. SUMMER tires have a tread designed to

provide superior performance on dry
pavement. However, the performance of
these tires will be substantially reduced in
snowy and icy conditions. If you operate
your vehicle on snowy or icy roads,
INFINITI recommends the use of MUD &
SNOW or ALL SEASON TIRES on all four
wheels. It is recommended that you visit
an INFINITI retailer for the tire type, size,
speed rating and availability information.

2. For additional traction on icy roads, stud-

ded tires may be used. However, some
U.S. states and Canadian provinces pro-
hibit their use. Check local, state and pro-
vincial laws before installing studded tires.

Skid and traction capabilities of studded
snow tires on wet or dry surfaces may be
poorer than that of non-studded snow tires.

3. Tire chains may be used. For additional

information, see “Tire chains”(P. 8-36).

COLD WEATHER DRIVING

Starting and driving

5-165

SPECIAL WINTER EQUIPMENT

It is recommended that the following items
be carried in the vehicle during winter:
• A scraper and stiff-bristled brush to re-

move ice and snow from the windows and
wiper blades.

• A sturdy, flat board to be placed under the

jack to give it firm support.

• A shovel to dig the vehicle out of

snowdrifts.

• Extra washer fluid to refill the windshield-

washer fluid reservoir.

DRIVING ON SNOW OR ICE

WARNING

•

Wet ice (32°F, 0°C and freezing rain),
very cold snow or ice can be slick and very
hard to drive on. The vehicle will have
much less traction or “grip” under these
conditions. Try to avoid driving on wet
ice until the road is salted or sanded.

•

Whatever the condition, drive with cau-
tion. Accelerate and slow down with
care. If accelerating or downshifting too
fast, the drive wheels will lose even more
traction.

•

Allow more stopping distance under
these conditions. Braking should be
started sooner than on dry pavement.

•

Allow greater following distances on
slippery roads.

•

Watch for slippery spots (glare ice).
These may appear on an otherwise clear
road in shaded areas. If a patch of ice is
seen ahead, brake before reaching it. Try
not to brake while on the ice, and avoid
any sudden steering maneuvers.

•

Do not use the cruise control on slippery
roads.

•

Snow can trap dangerous exhaust gases
under your vehicle. Keep snow clear of
the exhaust pipe and from around your
vehicle.

ENGINE BLOCK HEATER (if so
equipped)

Engine block heaters are used to assist with
cold temperature starting.

The engine block heater should be used when
the outside temperature is 20°F (-7°C) or
lower.

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 en-
gine. Damage to the cord could result in
an electrical shock and can cause serious
injury.

•

Use a heavy-duty 3-wire, 3-pronged ex-
tension cord rated for at least 10 A. 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.

To use the engine block heater:

1. Turn the engine off.

2. Open the hood and unwrap the engine

block heater cord.

3. Plug the engine block heater cord into a

grounded 3-wire, 3-pronged extension
cord.

5-166

Starting and driving

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.

ACTIVE NOISE CANCELLATION

This system uses microphones

O

1

located

inside the vehicle to detect engine booming
noise. The system then automatically gener-
ates a noise canceling sound through the
speakers and woofer (if so equipped) to re-
duce engine booming noise.

NOTE:
To operate the active noise cancellation
system properly:
• Do not cover the speakers or woofer (if so

equipped).

• Do not cover the microphones.

LSD2959

Front Microphone

LSD2960

Rear Microphone

ACTIVE NOISE CANCELLATION/
ACTIVE SOUND ENHANCEMENT

Starting and driving

5-167

• Do not change or modify speakers includ-

ing the woofer (if so equipped) and any
audio related components such as the
amplifier.

• Do not make any modification including

sound deadening or modifications around
the microphones or speakers.

ACTIVE SOUND ENHANCEMENT

Active sound enhancement enhances exist-
ing engine sounds according to the engine
speed and driving modes through the speak-
ers and woofer (if so equipped).

5-168

Starting and driving

6 In case of emergency

Hazard warning flasher switch . . . . . . . . . . . . . . . . . . .6-2
Roadside assistance program . . . . . . . . . . . . . . . . . . . . .6-2
Emergency engine shut off . . . . . . . . . . . . . . . . . . . . . . .6-3
Flat tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3

Tire Pressure Monitoring System (TPMS) . . . . . .6-3
Run-flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4

Jump starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Push starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
If your vehicle overheats . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Towing your vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8

Towing recommended by INFINITI . . . . . . . . . . . .6-8
Vehicle recovery (freeing a stuck vehicle) . . . . . .6-11

Push the switch on to warn other drivers
when you must stop or park under emer-
gency conditions. All turn signal lights flash.

WARNING

•

If stopping for an emergency, be sure to
move the vehicle well off the road.

•

Do not use the hazard warning flashers
while moving on the highway unless un-
usual circumstances force you to drive so
slowly that your vehicle might become a
hazard to other traffic.

•

Turn signals do not work when the haz-
ard warning flasher lights are on.

The flashers will operate with the ignition
switch placed in any position.

Some jurisdictions may prohibit the use of
the hazard warning flasher switch while
driving.

In the event of a roadside emergency, road-
side assistance service is available to you.
Please refer to your Warranty Information
Booklet (U.S.) or the Warranty & Roadside
Assistance Information Booklet (Canada) for
details.

LIC0394

HAZARD WARNING FLASHER
SWITCH

ROADSIDE ASSISTANCE PROGRAM

6-2

In case of emergency

To shut off the engine in an emergency situ-
ation while driving, perform the following
procedure:
– Rapidly push the push-button ignition

switch three consecutive times in less than
1.5 seconds, or

– Push and hold the push-button ignition

switch for more than 2 seconds.

TIRE PRESSURE MONITORING
SYSTEM (TPMS)

This vehicle is equipped with Tire Pressure
Monitoring System (TPMS). It monitors tire
pressure of all tires. When the low tire pres-
sure warning light is lit, and the “Tire Pressure
Low - Add Air” warning appears in the vehicle
information display, one or more of your tires
is significantly under-inflated. The system
also displays pressure of all tires (except the
spare tire) on the vehicle information display
screen by sending a signal from a sensor that
is installed in each wheel. If the vehicle is
being driven with low tire pressure, the TPMS
will activate and warn you of it by the low tire
pressure warning light. This system will acti-
vate only when the vehicle is driven at speeds
above 16 mph (25 km/h). For additional in-
formation, see “Warning lights, indicator
lights and audible reminders” (P. 2-9) and
“Tire Pressure Monitoring System (TPMS)”
(P. 8-27).

WARNING

•

Radio waves could adversely affect elec-
tric medical equipment. Those who use a
pacemaker should contact the electric
medical equipment manufacturer for the
possible influences before use.

•

If the low tire pressure warning light illu-
minates while driving, avoid sudden
steering maneuvers or abrupt braking,
reduce vehicle speed, pull off the road to
a safe location and stop the vehicle as
soon as possible. Driving with under-
inflated tires may permanently damage
the tires and increase the likelihood of
tire failure. Serious vehicle damage could
occur and may lead to an accident and
could result in serious personal injury.
Check the tire pressure for all four tires.
Adjust the tire pressure to the recom-
mended COLD tire pressure shown on
the Tire and Loading Information label to
turn the low tire pressure warning light
OFF. If the light still illuminates while
driving after adjusting the tire pressure,
a tire may be flat or the TPMS may be
malfunctioning. If you have a flat tire,
replace it with a replacement tire as soon
as possible. If no tires are flat and all tires
are properly inflated, have the vehicle
checked. It is recommended that you
visit an INFINITI retailer for this service.

EMERGENCY ENGINE SHUT OFF

FLAT TIRE

In case of emergency

6-3

•

When replacing a wheel without TPMS
such as the spare tire, the TPMS will not
function and the low tire pressure warn-
ing light will flash for approximately 1
minute. The light will remain on after 1
minute. Have your tires replaced and/or
TPMS system reset as soon as possible.
It is recommended that you visit an
INFINITI retailer for these services.

•

Replacing tires with those not originally
specified by INFINITI could affect the
proper operation of the TPMS.

•

Do not inject any tire liquid or aerosol tire
sealant into the tires, as this may cause a
malfunction of the tire pressure sensors.

RUN-FLAT TIRES

This vehicle is equipped with run-flat tires.
Run-flat tires can be used temporarily if they
are punctured. When the “Flat Tire — Visit
dealer” warning appears in the vehicle infor-
mation display, one or more of your tires is
punctured. For additional information, see
“Run-flat tires” (P. 8-34).

For additional information, refer to the tire
safety information in the Warranty Informa-
tion Booklet.

WARNING

•

Although you can continue driving with a
punctured run-flat tire, remember that
vehicle handling stability is reduced,
which could lead to an accident and per-
sonal injury. Also, driving a long distance
at high speeds may damage the tires.

•

Do not drive at speeds above 50 mph (80
km/h) and do not drive more than ap-
proximately 93 miles (150 km) with a
punctured run-flat tire. The actual dis-
tance the vehicle can be driven on a flat
tire depends on outside temperature, ve-
hicle load, road conditions and other
factors.

•

Drive safely at reduced speeds. Avoid
hard cornering or braking, which may
cause you to lose control of the vehicle.

•

If you detect any unusual sounds or vi-
brations while driving with a punctured
run-flat tire, pull off the road to a safe
location and stop the vehicle as soon as
possible. The tire may be seriously dam-
aged and need to be replaced.

CAUTION

•

Never install tire chains on a punctured
run-flat tire, as this could damage your
vehicle.

•

Avoid diving over any projection or pot-
hole, as the clearance between the ve-
hicle and the ground is smaller than
normal.

•

Do not enter an automated car wash
with a punctured run-flat tire.

•

Have the punctured tire inspected by an
INFINITI retailer or other authorized re-
pair shop. Replace the tire as soon as
possible if the tire is seriously damaged.

6-4

In case of emergency