key INFINITI QX80 2023 Repair Manual

5-54Starting and driving
The radar sensorsdetect an approaching
vehicle. The sonar sensorsdetect station-
ary objects behind the vehicle. Refer to the
illustration for approximate zone coverage
areas
.
WAF0738X
Side indicator light
BCI OFF indicator
“P” key (on the touch screen display)
Steering-wheel-mounted controls (left
side)

JVS0173X
BCI SYSTEM OPERATION
When the shift lever is in the R (Reverse)
position and the vehicle speed is less than
approximately 5 MPH (8 km/h), the BCI
system operates.
If the radar detects a vehicle approaching
from the side or the sonar detects close
stationary objects behind the vehicle, the
system gives visual and audible warnings. If
the driver does not apply the brakes, the
system automatically applies the brake for a
moment when the vehicle is moving back-
wards. After the automatic brake applica-
tion, the driver must depress the brake pedal
to maintain brake pressure. If the driver’s
foot is on the accelerator pedal, the systempushes the accelerator upward before ap-
plying the brake. If you continue to accel-
erate, the system will not engage the brake.
WAE0785X
When the shift lever is placed in the R
(Reverse) position, the indicator on the “P”
key
illuminates on the touch screen dis-
play.
Starting and driving5-55

5-58Starting and driving
The BCI system can be turned off tempora-
rily by touching the “P” keyon the touch
screen display. The indicator on the “P” key
turns off and the BCI OFF indicator appears
on the vehicle information display.
When the shift lever is placed in the R
(Reverse) position again, the BCI system is
turned on.
NOTE:
. When the “P” key is touched, the
indicator light on the key will turn off
and the BCI system will turn off tem-
porarily. The Moving Object Detection
(MOD) and the sonar systems will also
be turned off at the same time.
. When the sonar and MOD systems are
turned off on the settings menu in the
touch screen display, the “P” key will
disappear.
To enable or disable the BCI system, use the
vehicle information display. See “How to
enable/disable the BCI system” (P.5-58).
WAF0718X
Steering-wheel-mounted control (left
side)
Vehicle information display
HOW TO ENABLE/DISABLE THE
BCI SYSTEM
1. Push thebutton until “Settings”
appears in the vehicle information dis-
play. Use the
button to select “Driver
Assistance”. Then push the OK button.

5-128Starting and driving
continuously.
SONAR FUNCTION SETTINGS
The camera aiding sonar function settings
can be changed using the following proce-
dures.
1. Push the MENU button on the INFINITIcontroller.
2. Touch the "Settings" key on the touch screen display.
3. Touch the "Parking Sonar" key.

5-130Starting and driving
WAF0783X
Example
TURNING ON AND OFF THE SO-
NAR FUNCTION
When the “P” keyis touched, the indicator
lighton the key will turn off and the sonar
will turn off temporarily. The Moving Object
Detection (MOD) and the Back-up Collision
Intervention (BCI) systems will also be
turned off at the same time. See “Moving
Object Detection (MOD)” (P.4-22) and
“Back-up Collision Intervention (BCI)” (P.5-
53).
When the “P” key
is touched again, the
indicator lightwill turn on and the sonar
will turn back on. In the cases below, the sonar will be turned
back on automatically:
.
When the shift lever is in the R (Reverse)
position.
. When the CAMERA button is pushed
and a screen other than the camera view
is shown on the display.
. When vehicle speed decreases below
approximately 5 MPH (8 km/h).
. When the ignition switch is placed in the
OFF position and turned back to the ON
position again.
To prevent the sonar system from activating
altogether, use the sonar system settings
menu. See “Sonar system settings” (P.4-19).
When both Sonar and the MOD system are
deactivated from the settings menu, the "P"
key
will disappear from the display. (See
“Sonar system settings” (P.4-19) and “MOD
function settings” (P.4-25).)
WAF0776X
Example
When the corner of the vehicle moves closer
to an object, the corner sonar indicator
appears. When the center of the vehicle
moves close to an object, the center sonar (if
so equipped) indicator
appears.

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

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

8-2Do-it-yourself
When performing any inspection or main-
tenance work on your vehicle, always take
care to prevent serious accidental injury to
yourself or damage to the vehicle. The
following are general precautions which
should be closely observed.
WARNING
.Park the vehicle on a level surface,
apply the parking brake securely and
block the wheels to prevent the
vehicle from moving. Move the shift
lever to P (Park).
. Be sure the ignition switch is in the
OFF or LOCK position when per-
forming any parts replacement or
repairs.
. Never connect or disconnect the
battery or any transistorized compo-
nent while the ignition switch is in the
ON position.
. Never leave the engine or automatic
transmission related component har-
nesses disconnected while the igni-
tion switch is in the ON position.
. If you must work with the engine
running, keep your hands, clothing,
hair and tools away from moving
fans, belts and any other moving parts.
. It is advisable to secure or remove
any loose clothing and remove any
jewelry, such as rings, watches, etc.
before working on your vehicle.
. Always wear eye protection when-
ever you work on your vehicle.
. If you must run the engine in an
enclosed space such as a garage, be
sure there is proper ventilation for
exhaust gases to escape.
. Never get under the vehicle while it is
supported only by a jack. If it is
necessary to work under the vehicle,
support it with safety stands.
. Keep smoking materials, flame and
sparks away from fuel tank and the
battery.
. Your vehicle is equipped with an
automatic engine cooling fan. It may
come on at any time without warn-
ing, even if the ignition key is in the
OFF position and the engine is not
running. To avoid injury, always dis-
connect the negative battery cable
before working near the fan.
. On gasoline engine models, the fuel
filter or fuel lines should be serviced
because the fuel lines are under high
pressure even when the engine is off. It is recommended you visit an
INFINITI retailer for this service.
CAUTION
.
Do not work under the hood while the
engine is hot. Turn the engine off and
wait until it cools down.
. Avoid direct contact with used en-
gine oil and coolant. Improperly dis-
posed engine oil, coolant, and/or
other vehicle fluids can damage the
environment. Always conform to lo-
cal regulations for disposal of vehicle
fluid.
This “8. Do-it-yourself” section gives in-
structions regarding only those items which
are relatively easy for an owner to perform.
A genuine INFINITI Service Manual is also
available. (See “Owner’s Manual/Service
Manual order information” (P.10-35).)
You should be aware that incomplete or
improper servicing may result in operating
difficulties or excessive emissions, and could
affect your warranty coverage. If in doubt
about any servicing, it is recommended you
have it done by an INFINITI retailer.
MAINTENANCE PRECAUTIONS

NOTE:
If the extended storage fuse switch mal-
functions or if the fuse is open, it is not
necessary to replace the switch. In this case,
remove the extended storage fuse switch
and replace it with a new fuse of the same
rating.
How to remove the extended storage fuse
switch:
1. To remove the extended storage fuseswitch, be sure the ignition switch is in
the OFF or LOCK position.
2. Be sure the headlights are off. (See “Headlight switch” (P.2-44) or “Auto-
light system” (P.2-44).)
3. Remove the fuse box cover.
4. Pinch the locking tabs
found on each
side of the storage fuse switch.
5. Pull the storage fuse switch straight out from the fuse box
.
CAUTION
Be careful not to allow children to
swallow the battery and removed parts.
SDI2451
Replace the battery as follows:
1. Release the lock knob at the back of theIntelligent Key and remove the mechan-
ical key.
2. Insert a small screwdriver into the slit of the corner and twist it to separate the
upper part from the lower part. Use a
Do-it-yourself8-21
INTELLIGENT KEY BATTERY
REPLACEMENT

22,500 Miles/18 Months/36,000
Km
Perform at number of miles, kilometers or months,
whichever comes first.
Standard maintenance:
Inspections:
.Intelligent key battery
Essentials:
.Replace engine oil and filter.Tire rotation
Severe use maintenance:
Not Applicable. Proceed to next interval.
25,000 Miles/30 Months/40,000
Km
Perform at number of miles, kilometers or months,
whichever comes first.
Standard maintenance:
Not Applicable. Proceed to next interval.
Severe use maintenance:
Inspections:
.Brake pads and rotors.Steering gear and linkage.Axle and suspension parts.Propeller shaft (4WD models).Drive shaft boots (4WD models).Exhaust system
Essentials:
.Replace engine oil and filter
30,000 Miles/24 Months/48,000
Km
Perform at number of miles, kilometers or months,
whichever comes first.
Standard maintenance:
Inspections:
.Brake lines and cables.Brake pads and rotors.Fuel tank vapor vent system hoses.Fuel lines/connections.Exhaust system.Steering gear and linkage.Axle and suspension parts.Differential gear oil.Propeller shaft (4WD models).Transfer case oil (4WD models).Drive shaft boots (4WD models)
Essentials:
.Replace engine oil and filter.Replace engine air filter (1).Replace brake fluid.Replace in-cabin microfilter.Tire rotation.Lubricate propeller shaft grease (4WD models)
Severe use maintenance:
Not Applicable. Proceed to next interval.
(1) If operating mainly in dusty conditions, more
frequent maintenance may be required.
Maintenance and schedules9-9