ECU INFINITI QX50 2023 Workshop Manual

Power operation is only available when the
power liftgate main switch is in the OFF po-
sition by pressing the liftgate button on the
key fob.
Motion-Activated Liftgate (if so equipped)
will not function when the power liftgate
main switch is in the OFF position.
LIFTGATE RELEASE
WARNING
• Always be sure the liftgate has been
closed securely to prevent it from open-
ing while driving.
• Do not drive with the liftgate open. This
could allow dangerous exhaust gases to
be drawn into the vehicle. For additional
information, see “Exhaust gas (carbon
monoxide)” (P. 5-4).
• To avoid personal injury, do not attempt
to activate the power liftgate if one or
both of the liftgate struts are removed.
CAUTION
• If the power liftgate does not stay open
or if the liftgate unexpectedly closes at
any time while a continuous warning
chime sounds, do not operate the lift-
gate. There may be a pressure loss in one
or both of the liftgate struts. It is recom-
mended that you have the liftgate in-
spected. It is recommended that you visit
an INFINITI retailer for this service.
• Do not activate the power liftgate if one
or both of the liftgate struts are re-
moved. Damage to the liftgate or power
liftgate mechanisms may occur.
• Keep the power liftgate main switch (if
so equipped) in the OFF position when
washing or working around the back of
the vehicle (with Intelligent Key) to pre-
vent inadvertent opening/closing.
Power liftgate release
If the liftgate cannot be opened with the
instrument panel switch, liftgate opener
switch or key fob due to a discharged battery,
follow these steps:
1. Remove the cover
OAon the inside of the
liftgate.
2. Move the lever
OBas illustrated to open
the liftgate.
It is recommended that you visit an INFINITI
retailer as soon as possible for repair.
LPD2749
Pre-driving checks and adjustments3-27

•Touch the one touch unlock sensor while
carrying the Intelligent Key with you. For
additional information, see “Unlocking
doors and fuel-filler door” (P. 3-12).
2. To open the fuel-filler door, push the right side of the fuel-filler door to release.
To lock, close the fuel-filler door securely and
lock the doors.
FUEL-FILLER CAP
WARNING
• Gasoline is extremely flammable and
highly explosive under certain condi-
tions. You could be burned or seriously
injured if it is misused or mishandled. Al-
ways stop the engine and do not smoke
or allow open flames or sparks near the
vehicle when refueling.
• Do not attempt to top off the fuel tank
after the fuel pump nozzle shuts off au-
tomatically. Continued refueling may
cause fuel overflow, resulting in fuel
spray and possibly a fire. •
Use only an original equipment type fuel-
filler cap as a replacement. It has a
built-in safety valve needed for proper
operation of the fuel system and emis-
sion control system. An incorrect cap can
result in a serious malfunction and pos-
sible injury. It could also cause the
Malfunction Indicator Light (MIL) to
come on.
• Never pour fuel into the throttle body to
attempt to start your vehicle.
• Do not fill a portable fuel container in the
vehicle or trailer. Static electricity can
cause an explosion of flammable liquid,
vapor or gas in any vehicle or trailer. To
reduce the risk of serious injury or death
when filling portable fuel containers:
– Always place the container on the
ground when filling.
– Do not use electronic devices when
filling.
– Keep the pump nozzle in contact with
the container while you are filling it.
– Use only approved portable fuel con-
tainers for flammable liquid.
CAUTION
• Do not use a fuel containing more than
15% ethanol in your vehicle. For addi-
tional information, see “Fuel recommen-
dation” (P. 10-4).
•
The Loose Fuel Cap warning message will
be displayed if the fuel-filler cap is not
properly tightened. It may take a few driv-
ing trips for the message to be displayed.
Failure to tighten the fuel-filler cap prop-
erly after the Loose Fuel Cap warning
is displayed may cause the Malfunction
Indicator Light (MIL) to illuminate.
• Failure to tighten the fuel-filler cap
properly may cause theMalfunc-
tion Indicator Light (MIL) to illuminate.
If the
light illuminates because the
fuel-filler cap is loose or missing, tighten
or install the cap and continue to drive
the vehicle. The
light should turn off
after a few driving trips. If thelight
does not turn off after a few driving
trips, have the vehicle inspected. It is rec-
ommended that you visit an INFINITI
retailer for this service.
Pre-driving checks and adjustments3-29

3. Touch the “Display Settings” key. Select apreferred item, “Brightness”, “Contrast”,
Tint”, “Color”, and “Black Level” of the
RearView Monitor and adjust the value by
touching the “+” or “-” key.
You can also press the
button and either
turn or move the INFINITI controller to adjust
the day/night settings. Pressing the
button again will switch the screen to AUTO
mode. While the adjustment screen is shown
on the upper display you can also touch either
“+” or “-” key.
The upper and lower display screens can be
turned on or off by pressing and holding the
button.
NOTE:
Do not adjust the Brightness, Contrast, Tint,
Color, and Black Level of the RearView
Monitor while the vehicle is moving. Make
sure the parking brake is firmly applied.
HOW TO TURN ON AND OFF
PREDICTED COURSE LINES
To toggle on and off the predicted course
lines while in the P (Park) position:
1. Press the MENU button.
2. Touch the “Settings” key. 3. Touch the “Camera” key.
4. Touch the “Predicted Course Lines” key to
turn the feature on or off.
When the predicted course lines are
turned on, the indicator light is on.
REARVIEW MONITOR SYSTEM
LIMITATIONS
WARNING
Listed below are the system limitations for
RearView Monitor. Failure to operate the
vehicle in accordance with these system
limitations could result in serious injury or
death.
• The system cannot completely eliminate
blind spots and may not show every
object.
• Underneath the bumper and the corner
areas of the bumper cannot be viewed on
the RearView Monitor because of its
monitoring range limitation. The system
will not show small objects below the
bumper, and may not show objects close
to the bumper or on the ground.
• Objects viewed in the RearView Monitor
differ from actual distance because a
wide-angle lens is used. •
Objects in the RearView Monitor will ap-
pear visually opposite compared to when
viewed in the rearview and outside
mirrors.
• Use the displayed lines as a reference.
The lines are highly affected by the num-
ber of occupants, fuel level, vehicle posi-
tion, road conditions and road grade.
• Make sure that the liftgate is securely
closed when backing up.
• Do not put anything on the rearview
camera. The rearview camera is installed
above the license plate.
• When washing the vehicle with high
pressure water, be sure not to spray it
around the camera. Otherwise, water
may enter the camera unit causing water
condensation on the lens, a malfunction,
fire or an electric shock.
• Do not strike the camera. It is a precision
instrument. Otherwise, it may malfunc-
tion or cause damage resulting in a fire or
an electric shock.
Monitor, climate, audio, phone and voice recognition systems4-9

AROUND VIEW® MONITOR
SYSTEM LIMITATIONS
WARNING
Listed below are the system limitations for
Around View® Monitor. Failure to operate
the vehicle in accordance with these sys-
tem limitations could result in serious in-
jury or death.
• Do not use the Around View® Monitor
with the outside mirrors in the stored po-
sition, and make sure that the liftgate is
securely closed when operating the ve-
hicle using the Around View® Monitor.
• The apparent distance between objects
viewed on the Around View® Monitor
differs from the actual distance.
• The cameras are installed on the front
grille, the outside mirrors and above the
rear license plate. Do not put anything on
the vehicle that covers the cameras.
• When washing the vehicle with high
pressure water, be sure not to spray it
around the cameras. Otherwise, water
may enter the camera unit causing water
condensation on the lens, a malfunction,
fire or an electric shock.
• Do not strike the cameras. They are pre-
cision instruments. Doing so could cause
a malfunction or cause damage resulting
in a fire or an electric shock. There are some areas where the system will
not show objects and the system does not
warn of moving objects. When in the front or
rear view display, an object below the bum-
per or on the ground may not be viewed
O1.
When in the bird’s-eye view, a tall object near
the seam
O2of the camera viewing areas will
not appear in the monitor.
The following are operating limitations and
do not represent a system malfunction:
• There may be a delay when switching be- tween views.
• When the temperature is extremely high or low, the screen may not display objects
clearly.
• When strong light directly shines on the camera, objects may not be displayed
clearly.
• The screen may flicker under fluorescent light.
• The colors of objects on the Around View® Monitor may differ somewhat from the ac-
tual color of objects.
• Objects on the Around View® Monitor may not be clear and the color of the object may
differ in a dark environment.
LHA4348
4-22Monitor, climate, audio, phone and voice recognition systems

WARNING
• Do not leave children or adults who
would normally require the assistance of
others alone in your vehicle. Pets should
also not be left alone. They could acci-
dentally injure themselves or others
through inadvertent operation of the
vehicle. Also, on hot, sunny days, tem-
peratures in a closed vehicle could
quickly become high enough to cause se-
vere or possibly fatal injuries to people or
animals.
• Properly secure all cargo with ropes or
straps to help prevent it from sliding or
shifting. Do not place cargo higher than
the seatbacks. In a sudden stop or colli-
sion, unsecured cargo could cause per-
sonal injury.
EXHAUST GAS (carbon monoxide)
WARNING
• Do not breathe exhaust gases; they con-
tain colorless and odorless carbon mon-
oxide. Carbon monoxide is dangerous. It
can cause unconsciousness or death. •
If you suspect that exhaust fumes are
entering the vehicle, drive with all win-
dows fully open, and have the vehicle in-
spected immediately.
• Do not run the engine in closed spaces
such as a garage.
• Do not park the vehicle with the engine
running for any extended length of time.
• Keep the rear vent windows, liftgates,
doors and trunk lids (if so equipped)
closed while driving, otherwise exhaust
gases could be drawn into the passenger
compartment. If you must drive with one
of these open, follow these precautions:
1. Open all the windows.
2. Set the
air recirculation button
to off and the fan control dial to high
to circulate the air.
• If electrical wiring or other cable connec-
tions must pass to a trailer through the
seal on the liftgate or the body, follow
the manufacturer's recommendation to
prevent carbon monoxide entry into the
vehicle. •
The exhaust system and body should be
inspected by a qualified mechanic when-
ever:
a. The vehicle is raised for service.
b.
You suspect that exhaust fumes are
entering into the passenger compart-
ment.
c. You notice a change in the sound of the exhaust system.
d. You have had an accident involving damage to the exhaust system, un-
derbody, or rear of the vehicle.
THREE-WAY CATALYST
The three-way catalyst is an emission control
device installed in the exhaust system. Ex-
haust gases in the three-way catalyst are
burned at high temperatures to help reduce
pollutants.
WARNING
• The exhaust gas and the exhaust system
are very hot. Keep people, animals or
flammable materials away from the ex-
haust system components.
PRECAUTIONS WHEN STARTING
AND DRIVING
5-4Starting and driving

•Do not drive across steep slopes. Instead
drive either straight up or straight down
the slopes. Off-road vehicles can tip over
sideways much more easily than they can
forward or backward.
• Many hills are too steep for any vehicle.
If you drive up them, you may stall. If you
drive down them, you may not be able to
control your speed. If you drive across
them, you may roll over.
• Do not shift gears while driving on
downhill grades as this could cause loss
of control of the vehicle.
• Stay alert when driving to the top of a
hill. At the top there could be a drop-off
or other hazard that could cause an
accident.
• If your engine stalls or you cannot make
it to the top of a steep hill, never attempt
to turn around. Your vehicle could tip or
roll over. Always back straight down in R
(Reverse) gear and apply brakes to con-
trol your speed.
• Heavy braking going down a hill could
cause your brakes to overheat and fade,
resulting in loss of control and an acci-
dent. Apply brakes lightly and use a low
gear to control your speed. •
Unsecured cargo can be thrown around
when driving over rough terrain. Prop-
erly secure all cargo so it will not be
thrown forward and cause injury to you
or your passengers.
• Secure heavy loads in the cargo area as
far forward and as low as possible. Do
not equip the vehicle with tires larger
than specified in this manual. This could
cause your vehicle to roll over.
• Do not grip the inside or spokes of the
steering wheel when driving off-road.
The steering wheel could move suddenly
and injure your hands. Instead drive with
your fingers and thumbs on the outside
of the rim.
• Before operating the vehicle, ensure that
the driver and all passengers have their
seat belts fastened.
• Always drive with the floor mats in place
as the floor may become hot.
• Lower your speed when encountering
strong crosswinds. With a higher center
of gravity, your INFINITI is more af-
fected by strong side winds. Slower
speeds ensure better vehicle control.
• Do not drive beyond the performance ca-
pability of the tires, even with AWD
engaged. •
For AWD equipped vehicles, do not at-
tempt to raise two wheels off the ground
and shift the transmission to any drive or
reverse position with the engine running.
Doing so may result in drivetrain damage
or unexpected vehicle movement which
could result in serious vehicle damage or
personal injury.
• Do not attempt to test an AWD
equipped vehicle on a 2-wheel dyna-
mometer (such as the dynamometers
used by some states for emissions test-
ing) or similar equipment even if the
other two wheels are raised off the
ground. Make sure you inform test facil-
ity personnel that your vehicle is
equipped with AWD before it is placed
on a dynamometer. Using the wrong test
equipment may result in drivetrain dam-
age or unexpected vehicle movement
which could result in serious vehicle dam-
age or personal injury.
• When a wheel is off the ground due to an
unlevel surface, do not spin the wheel
excessively.
• Accelerating quickly, sharp steering ma-
neuvers or sudden braking may cause
loss of control.
Starting and driving5-11

WARNING
Do not operate the push-button ignition
switch while driving the vehicle except in
an emergency. (The engine will stop when
the ignition switch is pushed three con-
secutive times in quick succession or the
ignition switch is pushed and held for more
than 2 seconds.) If the engine stops while
the vehicle is being driven, this could lead
to a crash and serious injury.
When the ignition switch is pushed without
depressing the brake pedal, the ignition
switch will change as follows:
Push the ignition switch center:
• Once to change to ON.
• Two times to change to OFF.
The ignition switch will automatically return
to the LOCK position when any door is either
opened or closed with the switch in the OFF
position.
The ignition lock is designed so that the igni-
tion switch cannot be placed in the OFF po-
sition until the shift position is in the P (Park)
position. When the ignition switch cannot be placed in
the OFF position, proceed as follows:
1. Press the Park button to place the vehicle
in the P (Park) position.
2. Push the ignition switch. The ignition switch position will change to the ON
position.
3. Push the ignition switch again to the OFF position.
The shift position can be shifted from the P
(Park) position if the ignition switch is in
the ON position and the brake pedal is
depressed.
If the battery of the vehicle is discharged, the
ignition switch cannot be moved from the
LOCK position.
Some indicators and warnings for operation
are displayed on the vehicle information dis-
play. For additional information, see “Vehicle
information display” (P. 2-19).
LSD2911
PUSH-BUTTON IGNITION SWITCH
Starting and driving5-13

AUTO ACC
With the vehicle in the P (Park) position, the
Intelligent Key with you and the ignition
switch placed from the ON position to the
OFF position, the radio can still be used for a
period of time, or until the driver’s door is
opened.
After a period of time, functions such as ra-
dio, navigation, and Bluetooth® Hands-Free
Phone System may be restarted by pressing
the POWER button/VOLUME control knob
or the key fob unlock button. For additional
information, see the “Monitor, climate, audio,
phone and voice recognition systems”
(P. 4-2).
EMERGENCY ENGINE SHUT OFF
To shut off the engine in an emergency situ-
ation while driving, perform the following
procedure:
• Rapidly push the ignition switch three con-secutive times in less than 1.5 seconds, or
• Push and hold the ignition switch for more than 2 seconds.
INFINITI INTELLIGENT KEY
BATTERY DISCHARGE
If the battery of the Intelligent Key is dis-
charged or environmental conditions inter-
fere with the Intelligent Key operation, start
the engine according to the following proce-
dure:
1. Press the Park button to place the vehicle in the P (Park) position.
2. Firmly apply the foot brake. 3.
Touch the ignition switch with the Intelli-
gent Key as illustrated. (A chime will sound.)
4. Push the ignition switch while depressing
the brake pedal within 10 seconds after
the chime sounds. The engine will start.
After step 3 is performed, when the ignition
switch is pushed without depressing the
brake pedal, the ignition switch position will
change to ON.
NOTE:
• When the ignition switch is placed in the ON position or the engine is started by the
above procedure, the Intelligent Key bat-
tery discharge indicator may appear in the
vehicle information display even when the
Intelligent Key is inside the vehicle. This is
not a malfunction. To turn off the Intelli-
gent Key battery discharge indicator,
touch the ignition switch with the Intelli-
gent Key again.
• If the Intelligent Key battery discharge in- dicator appears, replace the battery as
soon as possible. For additional informa-
tion, see “Battery replacement” (P. 8-22).
LSD3572
Starting and driving5-15

CAUTION
• Use the P (Park), R (Reverse) or D (Drive)
position only when the vehicle is com-
pletely stopped.
• When switching to the desired shift po-
sition by operating the shift lever, check
that the shift lever returns to the home
position by releasing your hand from the
lever. Holding the shift lever in a mid-
way position may also damage the shift
control system.
• Do not operate the shift lever while the
accelerator pedal is depressed. This may
cause a sudden start which could result in
an accident.
• The following operations are not allowed
because excessive force would be ap-
plied to the transmission and this may
result in damage to the vehicle:
– Moving the shift lever to the R (Re- verse) position when driving forward
– Moving the shift lever to the D (Drive) position when reversing
If the vehicle is moving over 8 km/h (5mph)
when shifting to D (Drive) from R (Re-
verse), the N (Neutral) position will auto-
matically be selected. A buzzer will sound,
noting that D (Drive) was not selected. When selecting D (Drive) while reversing
below 8 km/h (5 mph) the range will
change normally.
If these operations are attempted, a chime
sounds and the vehicle shifts to the N (Neu-
tral) position.
P (Park)
CAUTION
• To prevent transmission damage, use the
P (Park) position only when the vehicle is
completely stopped.
• Do not slide the shift lever while pressing
the park button. This may damage the
shift control system.
Use the P (Park) position when the vehicle is
parked or when starting the engine. Make
sure the vehicle is completely stopped before
pressing the park button to engage the P
(Park) position. For maximum safety, the
brake pedal must be depressed before en-
gaging the P (Park) position. Use this position
together with the electronic parking brake.
When parking on a hill, first depress the brake
pedal, apply the electronic parking brake and
then engage the P (Park) position. The park-
ing lock should not be used as a brake when parking. In order to secure the vehicle, always
apply the electronic parking brake in addition
to the parking lock.
In the event of a malfunction of the vehicle’s
electronics, the transmission may lock in the
P (Park) position. Have the vehicle’s electron-
ics checked immediately. It is recommended
that you visit an INFINITI retailer for this
service.
The P (Park) position is automatically en-
gaged if:
• You place the ignition switch in the OFF
position
• You unfasten the driver’s seat belt and open the driver side door when the vehicle
is stationary or driving at very low speed
and the transmission is in the D (Drive)
position, the N (Neutral) position, the R
(Reverse) position, or the M (Manual)
position.
CAUTION
To avoid CVT malfunction, you must
manually place the shift position in the P
(Park) position under the above conditions.
5-20Starting and driving

•Before leaving the vehicle, press the Park
button to place the vehicle in the P (Park)
position and check that the electronic
parking brake indicator light is illumi-
nated to confirm that the electronic
parking brake is applied. The electronic
parking brake indicator light will remain
on for a period of time after the driver’s
door is locked.
CAUTION
When parking in an area where the outside
temperature is below 32°F (0°C), the park-
ing brake, if applied, may freeze in place
and may be difficult to release.
For safe parking, it is recommended that
you place the shift position in the P (Park)
position and securely block the wheels.
NOTE:
• If a malfunction occurs in the electronic parking brake system (for example, due to
battery discharge), it is recommended that
you visit an INFINITI retailer. • Under the following conditions the elec-
tronic parking brake will automatically be
applied and the braking force of the auto-
matic brake hold will be released:
– The braking force is applied by the auto- matic brake hold function for 3 minutes
or longer.
– The vehicle is in the P (Park) position.
– The electronic parking brake is applied manually.
– The driver’s seat belt is unfastened.
– The driver’s door is opened.
– The ignition switch is placed in the OFF position.
– A malfunction occurs in the automatic brake hold function.
MANUAL OPERATION
The electronic parking brake will not be auto-
matically applied if the engine is stopped
without using the ignition switch (for ex-
ample, by engine stalling). In such a case, you
have to apply the parking brake manually.
To apply: Pull the switch up
O1. The indicator
light
OAwill illuminate.
To release: With the ignition switch in the ON
position, depress the brake pedal and push
the switch down
O2. The indicator lightOAwill turn off. Before driving, check that the electronic
parking brake indicator light (red) (if so
equipped)
orgoes out. For addi-
tional information, see “Warning lights, indi-
cator lights and audible reminders” (P. 2-9).
NOTE:
• A buzzer will sound if the vehicle is driven without releasing the parking brake. For
additional information, see “Warning
lights, indicator lights and audible remind-
ers” (P. 2-9).
• While the electronic parking brake is ap- plied or released, an operating sound is
heard from the lower side of the rear seat.
This is normal and does not indicate a
malfunction.
• When the electronic parking brake is fre- quently applied and released in a short pe-
riod of time, the parking brake may not
operate in order to prevent the parking
brake system from overheating. If this oc-
curs, operate the electronic parking brake
switch again after waiting approximately
1 minute.
• If the electronic parking brake must be ap- plied while driving in an emergency, pull up
and hold the parking brake switch. When
you release the parking brake switch, the
parking brake will be released.
Starting and driving5-25