battery replacement INFINITI QX80 2021 Owner's Manual

2-24Instruments and controls
OPERATIONAL INDICATORS
1. No Key Detected
This warning appears when the Intelligent
Key is left outside the vehicle with the
ignition switch in the ON position. Make
sure the Intelligent Key is inside the vehicle.
See “Intelligent Key system” (P.3-7) for more
details.
2. Key ID Incorrect
This warning appears when the ignition
switch is pushed from the OFF position
and the Intelligent Key is not recognized by
the system. You cannot start the engine with
an unregistered key.
See “Intelligent Key system” (P.3-7).
3. Key Battery Low
This indicator appears when the Intelligent
Key battery is running out of power.
If this indicator appears, replace the battery
with a new one. (See “Intelligent Key battery
replacement” (P.8-21).)
4. Key System Error: See Owner’s
Manual
This warning appears if there is a malfunc-
tion in the Intelligent Key system. If this
warning appears while the engine isstopped, it may be impossible to start the
engine.
If this warning appears while the engine is
running, you can drive the vehicle. However
in these cases, have the system checked. It is
recommended you visit an INFINITI retailer
for this service.
5. Key Registration Complete
This indicator appears when a new Intelli-
gent Key is registered to the vehicle.
6. Push brake and start switch to
drive
This indicator appears when the shift lever is
in the P (Park) position.
This indicator also appears when the vehicle
has been started using the Remote Engine
Start function (if so equipped).
This indicator means that the engine will
start by pushing the ignition switch with the
brake pedal depressed. You can start the
engine from any position of the ignition
switch.
7. Push Ignition to OFF
After the Shift to Park warning illuminates,
the warning will illuminate if the ignition
switch is placed in the ACC position when
the shift lever moves into the P (Park)
position.To turn off the warning, place the ignition
switch in the ON position and then in the
LOCK position.
8. Shift to Park
This warning appears when the ignition
switch is pushed to stop the engine with
the shift lever in any position except the P
(Park) position.
If this warning appears, move the shift lever
to the P (Park) position or push the ignition
switch to the ON position.
An inside warning chime will also sound. (See
“Intelligent Key system” (P.3-7).)
9. Engine start operation for Intel-
ligent Key system indicator (if I-Key
battery level is low)
This indicator appears when the Intelligent
Key battery is running out of power and
when the Intelligent Key system and vehicle
are not communicating normally.
If this indicator appears, touch the ignition
switch with the Intelligent Key while depres-
sing the brake pedal. (See “Intelligent Key
battery discharge” (P.5-14).)
10. Release Parking Brake
This warning appears when the vehicle
speed is above 4 MPH (7 km/h) and the

WARNING
.Radio waves could adversely affect
electric medical equipment. Those
who use a pacemaker should contact
the electric medical equipment man-
ufacturer for the possible influences
before use.
. The Intelligent Key transmits radio
waves when the buttons are pushed.
The FAA advises that the radio
waves may affect aircraft navigation
and communication systems. Do not
operate the Intelligent Key while on
an airplane. Make sure the buttons
are not operated unintentionally
when the unit is stored during a
flight.
The Intelligent Key system can operate all
the door locks using the remote controller
function or pushing the request switch on
the vehicle without taking the key out from a
pocket or purse. The operating environment
and/or conditions may affect the Intelligent
Key system operation.
Be sure to read the following before using
the Intelligent Key system.
CAUTION
. Be sure to carry the Intelligent Key
with you when operating the vehicle.
. Never leave the Intelligent Key in the
vehicle when you leave the vehicle.
The Intelligent Key is always communicating
with the vehicle as it receives radio waves.
The Intelligent Key system transmits weak
radio waves. Environmental conditions may
interfere with the operation of the Intelligent
Key system under the following operating
conditions.
. When operating near a location where
strong radio waves are transmitted, such
as a TV tower, power station and broad-
casting station.
. When in possession of wireless equip-
ment, such as a cellular telephone,
transceiver, and CB radio.
. When the Intelligent Key is in contact
with or covered by metallic materials.
. When any type of radio wave remote
control is used nearby.
. When the Intelligent Key is placed near
an electric appliance such as a personal
computer. .
When the vehicle is parked near a parking
meter.
In such cases, correct the operating condi-
tions before using the Intelligent Key func-
tion or use the mechanical key.
Although the life of the battery varies
depending on the operating conditions, the
battery’s life is approximately 2 years. If the
battery is discharged, replace it with a new
one.
Since the Intelligent Key is continuously
receiving radio waves, if the key is left near
equipment which transmits strong radio
waves, such as signals from a TV and
personal computer, the battery life may
become shorter.
For information regarding replacement of a
battery, see “Intelligent Key battery replace-
ment” (P.8-21).
As many as 4 Intelligent Keys can be
registered and used with one vehicle. For
information about the purchase and use of
additional Intelligent Keys, contact an
INFINITI retailer.
CAUTION
. Do not allow the Intelligent Key,
which contains electrical compo-
nents, to come into contact with
Pre-driving checks and adjustments3-7
INTELLIGENT KEY SYSTEM

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 ........................................................... 8-33
Tire chains ................................................................ 8-34
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 headlight switch is in the OFF position.
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

8-22Do-it-yourself
cloth to protect the casing.
3. Replace the battery with a new one. Recommended battery: CR2025 or
equivalent.
.Do not touch the internal circuit andelectric terminals as it could cause a
malfunction.
.Hold the battery by the edges. Hold-
ing the battery across the contact
points will seriously deplete the sto-
rage capacity.
.Make sure that the + side faces thebottom of the case.
SDI2452
4. Align the tips of the upper and lower
parts, and then push them together
until it is securely closed.
5. Push the buttons two or three times to check its operation.
It is recommended you visit an INFINITI
retailer if you need any assistance for
replacement.
FCC Notice:
For USA:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions: (1) This device
may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
Note: Changes or modifications not ex-
pressly approved by the party responsible
for compliance could void the user’s author-
ity to operate the equipment.
For Canada:
This device complies with Industry Canada
licence-exempt RSS standard(s). Operation
is subject to the following two conditions:
(1) this device may not cause interference,
and (2) this device must accept any inter-
ference, including interference that may
cause undesired operation of the device.

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

11-4
INFINITI InTouch™ Owner’s Manual ............... 4-2
INFINITI Vehicle Immobilizer System ............ 2-35
Inside mirror .......................................................... 3-30
Inspection/maintenance (I/M) test ............. 10-34
Instrument brightness control ......................... 2-46
Instrument panel ..................................................... 2-5
Intelligent cruise control (ICC) system .......... 5-64
Intelligent Key .......................................................... 3-2
Intelligent Key system ........................................... 3-7Battery replacement ..................................... 8-21
Key operating range ....................................... 3-9
Key operation ................................................. 3-10
Warning signals .............................................. 3-12
Interior light replacement .................................. 8-24
Interior light switch ............................................. 2-73
Interior lights ......................................................... 2-72
ISOFIX child restraint ......................................... 1-33
J
Jump starting ......................................................... 6-11
K
Keyless entry (See remote keyless
entry system) ........................................................ 3-15
Keys ........................................................................\
.... 3-2 For Intelligent Key system ............................. 3-7
L
Labels
Air bag warning labels ................................. 1-68
Air conditioner specification label ......... 10-13
Emission control information label ........ 10-12
Engine serial number ................................. 10-12
F.M.V.S.S./C.M.V.S.S.
certification label ........................................ 10-12
Tire and Loading
information label ............................. 8-28, 10-13
Vehicle identification number (VIN) ....... 10-11
Lane Departure Warning (LDW)/
Lane Departure Prevention (LDP) ................ 5-22
LATCH system ..................................................... 1-33
License plate, Installing front
license plate ......................................................... 10-15
Liftgate ................................................................... 3-22
Light
Air bag warning light .................................... 1-69
Bulb replacement ........................................... 8-23
Cargo light ....................................................... 2-75
Fog light switch ............................................. 2-47
Headlight switch ........................................... 2-40
Headlights bulb replacement .................... 8-24
Interior light switch ....................................... 2-73
Interior lights ................................................... 2-72
Map lights ........................................................ 2-74
Replacement ................................................... 8-23
Vanity mirror lights ....................................... 2-74 Warning lights, indicator lights and
audible reminders .......................................... 2-11
Lights, Exterior and interior
light replacement ................................................. 8-24
Loading information (See vehicle
loading information) ......................................... 10-15
Lock
Automatic door locks ..................................... 3-6
Door locks .......................................................... 3-4
Liftgate lock .................................................... 3-22
Power door lock ............................................... 3-4
Locking with mechanical key ............................. 3-4
Loose Fuel Cap warning ................................... 3-26
Low tire pressure warning light ...................... 2-16
Low tire pressure warning system (See tire
pressure monitoring system (TPMS)) ............... 5-5
Luggage hooks ..................................................... 2-66
M
Maintenance Battery .............................................................. 8-11
General maintenance ...................................... 9-2
Inside the vehicle ............................................. 9-3
Maintenance precautions .............................. 8-2
Maintenance requirements ........................... 9-2
Maintenance schedules ................................. 9-6
Outside the vehicle ......................................... 9-2
Seat belt maintenance ................................. 1-28
Standard maintenance .................................... 9-7
Maintenance schedules ........................................ 9-6
Malfunction indicator light (MIL) ..................... 2-17