2021 INFINITI QX80 change key battery

damage the Intelligent Key. If the
Intelligent Key gets wet, immedi-
ately wipe until it is completely
dry.
— Do not bend, drop or strike it against another object.
— If the outside temperature is below 14°F (−10°C), the battery
of the Intelligent Key may not
function properly.
— Do not place the Intelligent Key for an extended period in a place
where temperatures exceed
140°F (60°C).
— Do not change or modify the Intelligent Key.
— Do not use a magnet key holder.
— Do not place the Intelligent Key near an electric appliance such as
a television set or personal com-
puter.
— Do not allow the Intelligent Key to come into contact with water
or salt water, and do not wash it
in a washing machine. This could
affect the system function.
. If an Intelligent Key is lost or stolen,
INFINITI recommends erasing the ID
code of that Intelligent Key. This will prevent the Intelligent Key from un-
authorized use to unlock the vehicle.
For information regarding the eras-
ing procedure, it is recommended you
visit an INFINITI retailer.
SPA2033
Mechanical key
To remove the mechanical key, release the
lock knob at the back of the Intelligent Key.
To install the mechanical key, firmly insert it
into the Intelligent Key until the lock knob
returns to the lock position.
Use the mechanical key to lock or unlock the
doors and the glove box.
See “Doors” (P.3-4), “Storage” (P.2-60).
CAUTION
Always carry the mechanical key in-
stalled in the Intelligent Key.
Pre-driving checks and adjustments3-3

3-8Pre-driving checks and adjustments
water or salt water. This could affect
the system function.
. Do not drop the Intelligent Key.
. Do not strike the Intelligent Key
sharply against another object.
. Do not change or modify the Intelli-
gent Key.
. Wetting may damage the Intelligent
Key. If the Intelligent Key gets wet,
immediately wipe until it is comple-
tely dry.
. If the outside temperature is below
14°F (−10°C), the battery of the
Intelligent Key may not function
properly.
. Do not place the Intelligent Key for
an extended period in an area where
temperatures exceed 140°F (60°C).
. Do not attach the Intelligent Key
with a key holder that contains a
magnet.
. Do not place the Intelligent Key near
equipment that produces a magnetic
field, such as a TV, audio equipment
and personal computers.
If an Intelligent Key is lost or stolen, INFINITI
recommends erasing the ID code of that
Intelligent Key from the vehicle. This may
prevent the unauthorized use of the Intelli- gent Key to operate the vehicle. For infor-
mation regarding the erasing procedure, it is
recommended that you contact an INFINITI
retailer.

SSD1021
When the ignition switch is pushed without
depressing the brake pedal, the ignition
switch position will change as follows:
.Push center once to change to ACC.
. Push center two times to change to ON.
. Push center three times to change to
OFF. (No position illuminates.)
. Push center four times to return to ACC.
. Open or close any door to return to
LOCK during the OFF position.
The ignition lock is designed so that the
ignition switch position cannot be switched
to LOCK until the shift lever is moved to the
P (Park) position.
When the ignition switch cannot be pushed
toward the LOCK position, proceed as follows:
1. Move the shift lever into the P (Park)
position.
2. Push the ignition switch to the OFF position. The ignition switch position
indicator will not illuminate.
3. Open the door. The ignition switch will change to the LOCK position.
The shift lever can be moved from the P
(Park) position if the ignition switch is in the
ON position and the brake pedal is de-
pressed.
If the battery of the vehicle is discharged,
the push-button ignition switch cannot be
turned from the LOCK position.
Some indicators and warnings for operation
are displayed on the vehicle information
display between the speedometer and tach-
ometer. (See “Vehicle information display”
(P.2-20).)
PUSH-BUTTON IGNITION
SWITCH POSITIONS
LOCK (Normal parking position)
The ignition switch can only be locked in this
position.
The ignition switch will be unlocked when it
is pushed to the ACC position while carrying
the Intelligent Key.
ACC (Accessories)
This position activates electrical accessories
such as the radio, when the engine is not
running.
ACC has a battery saver feature that will
turn the ignition switch to the OFF position
after a period of time under the following
conditions:
. all doors are closed.
. shift lever is in P (Park).
. turn signal/hazard indicator lights are
not flashing.
The battery saver feature will be cancelled if
any of the following occur:
. any door is opened.
. shift lever is moved out of P (Park).
. ignition switch changes position.
ON (Normal operating position)
This position turns on the ignition system
and electrical accessories.
ON has a battery saver feature that will turn
the ignition switch to the OFF position, if the
vehicle is not running, after some time under
the following conditions:
.all doors are closed.
. shift lever is in P (Park).
. turn signal/hazard indicator lights are
not flashing.
Starting and driving5-13

5-14Starting and driving
The battery saver feature will be cancelled if
any of the following occur:
.any door is opened.
. shift lever is moved out of P (Park).
. ignition switch changes position.
OFF
The engine can be turned off in the position.
The ignition lock is designed so that the
ignition switch cannot be switched to the
LOCK position until the shift lever is moved
to the P (Park) position.
CAUTION
Do not leave the vehicle with the push-
button ignition switch in ACC or ON
positions when the engine is not running
for an extended period. This can dis-
charge the battery.
EMERGENCY ENGINE SHUT OFF
To shut off the engine in an emergency
situation while driving, perform the follow-
ing procedure:
.Rapidly push the push-button ignition
switch 3 consecutive times in less than
1.5 seconds, or .
Push and hold the push-button ignition
switch for more than 2 seconds.
SSD0944
INTELLIGENT KEY BATTERY DIS-
CHARGE
If the battery of the Intelligent Key is
discharged, or environmental conditions in-
terfere with the Intelligent Key operation,
start the engine according to the following
procedure:
1. Move the shift lever to the P (Park) position.
2. Firmly apply the foot brake.
3. Touch the ignition switch with the Intelligent 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 ACC.
NOTE:
. When the ignition switch is pushed to
the ACC or ON position or the engine is
started by the above procedures, the
“Key Battery Low” message appears on
the vehicle information display even if
the Intelligent Key is inside the vehicle.
This is not a malfunction. To turn off the
Intelligent Key battery discharge indi-
cator, touch the ignition switch with the
Intelligent Key again.
. If the “Key Battery Low” message
appears, replace the battery as soon as
possible. (See “Battery” (P.8-11).) .
Make sure the area around the vehicle is
clear.
. Check fluid levels such as engine oil,
coolant, brake fluid and window washer
fluid as frequently as possible, or at least
whenever you refuel.
. Check that all windows and lights are
clean.
. Visually inspect tires for their appearance
and condition. Also check tires for proper
inflation.
. Lock all doors.
. Position seat and adjust head restraints/
headrests.
. Adjust inside and outside mirrors.
. Fasten seat belts and ask all passengers
to do likewise.
. Check the operation of warning lights
when the ignition switch is pushed to the
ON position. (See “Warning lights, in-
dicator lights and audible reminders”
(P.2-11).) 1. Apply the parking brake.
2. Move the shift lever to the P (Park) or N
(Neutral) position. (P is recommended.)
The starter is designed not to operate
unless the shift lever is in either of the
above positions.
3. Push the ignition switch to the ON position. Firmly depress the brake pedal
and push the ignition switch to start the
engine.
To start the engine immediately, push
and release the ignition switch while
depressing the brake pedal with the
ignition switch in any position.
.If the engine is very hard to start inextremely cold weather or when re-
starting, depress the accelerator ped-
al a little (approximately 1/3 to the
floor) and while holding, crank the
engine. Release the accelerator pedal
when the engine starts.
.If the engine is very hard to start
because it is flooded, depress the
accelerator pedal all the way to the
floor and hold it. Push the ignition
switch to the ON position to start
cranking the engine. After 5 or 6
seconds, stop cranking by pushing
the ignition switch to OFF. After
cranking the engine, release the accel-
erator pedal. Crank the engine with
Starting and driving5-15
BEFORE STARTING THE ENGINE STARTING THE ENGINE