brake light INFINITI G37 2012 Owner's Guide

Black plate (376,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]5-56 Starting and drivingflashes so note the following:
. The road may be slippery or the system
may determine some action is required
to help keep the vehicle on the steered
path.
. You may feel a pulsation in the brake
pedal and hear a noise or vibration
from under the hood. This is normal
and indicates that the VDC system is
working properly.
. Adjust your speed and driving to the
road conditions.
See “ Vehicle Dynamic Control (VDC) warn-
ing light ” (P.2-17).
If a malfunction occurs in the system, the
VDC warning light
illuminates in the
instrument panel. The VDC system auto-
matically turns off.
The VDC OFF switch is used to turn off the
VDC system. The VDC off indicator
illuminates to indicate the VDC system is
off. When the VDC switch is used to turn off
the system, the VDC system still operates
to prevent one drive wheel from slipping by
transferring power to a non slipping drive
wheel. The VDC warning light
flashes if
this occurs. All other VDC functions are off,
and the VDC warning light
will not
flash. The VDC system is automatically reset to on when the ignition switch is
placed in the off position then back to the
on position.
See “ Vehicle Dynamic Control (VDC) warn-
ing light ” (P.2-17) and “ Vehicle Dynamic
Control (VDC) off indicator light ” (P.2-19).
The computer has a built-in diagnostic
feature that tests the system each time you
start the engine and move the vehicle
forward or in reverse at a slow speed.
When the self-test occurs, you may hear a
“ clunk ” noise and/or feel a pulsation in the
brake pedal. This is normal and is not an
indication of a malfunction.
WARNING . The VDC system is designed to help the
driver maintain stability but does not
prevent accidents due to abrupt steering
operation at high speeds or by careless
or dangerous driving techniques. Reduce
vehicle speed and be especially careful
when driving and cornering on slippery
surfaces and always drive carefully.
. Do not modify the vehicle ’ s suspension.
If suspension parts such as shock
absorbers, struts, springs, stabilizer bars, bushings and wheels are not
INFINITI recommended for your vehicle
or are extremely deteriorated, the VDC
system may not operate properly. This
could adversely affect vehicle handling
performance, and the VDC warning light
may illuminate.
. If brake related parts such as brake
pads, rotors and calipers are not INFINITI
recommended or are extremely deterio-
rated, the VDC system may not operate
properly and the VDC warning light
may illuminate.
. If engine control related parts are not
INFINITI recommended or are extremely
deteriorated, the VDC warning light
may illuminate.
. When driving on extremely inclined
surfaces such as higher banked corners,
the VDC system may not operate prop-
erly and the VDC warning light
may
illuminate. Do not drive on these types
of roads.
. When driving on an unstable surface
such as a turntable, ferry, elevator or
ramp, the VDC warning light
may
illuminate. This is not a malfunction.
Restart the engine after driving onto a

Black plate (383,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]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
recommended 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. If
you have a flat tire, replace it with a
spare tire as soon as possible.
. When a spare tire is mounted or a wheel
is replaced, the TPMS will not function
and the low tire pressure warning light
will flash for approximately 1 minute.
The light will remain on after 1 minute.
Contact your INFINITI retailer as soon as
possible for tire replacement and/or
system resetting.
. 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.
CHANGING A FLAT TIRE GUID-17392640-59D1-4ABE-91EE-2C0B6371262B
If you have a flat tire, follow the instruc-
tions below.
Stopping the vehicle GUID-D581A789-AFAC-489C-91F1-2711C20E7205
1. Safely move the vehicle off the road
and away from traffic.
2. Turn on the hazard warning flashers.
3. Park on a level surface and apply the
parking brake. Move the selector lever
to the P (Park) position (Automatic
transmission models). Move the shift
lever to the R (Reverse) gear (Manual
transmission models).
4. Turn off the engine.
5. Raise the hood to warn other traffic,
and to signal professional road assis-
tance personnel that you need assis-
tance.
6. Have all passengers get out of the
vehicle and stand in a safe place, away
from traffic and clear of the vehicle. WARNING . Make sure the parking brake is securely
applied and the manual transmission is
shifted into R (Reverse), or the automatic
transmission into P (Park).
. Never change tires when the vehicle is
on a slope, ice or slippery areas. This is
hazardous.
. Never change tires if oncoming traffic is
close to your vehicle. Wait for profes-
sional road assistance.
In case of emergency
6-3

Black plate (389,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ] SCE0653
WARNINGAlways follow the instructions below. Failure
to do so could result in damage to the
charging system and cause personal injury.
1. If the booster battery is in another
vehicle
* A
, position the two vehicles
(
* A
and
* B
) to bring their batteries
into close proximity to each other.
Do not allow the two vehicles to touch.
2. Apply parking brake. Move the selector
lever to the P (Park) position (Automatic transmission models). Move the shift
lever to the N (Neutral) position (Man-
ual transmission models). Switch off all
unnecessary electrical systems (light,
heater, air conditioner, etc.).
3. Remove vent caps on the battery (if so
equipped). Cover the battery with a
firmly wrung out moist cloth
* C
to
reduce explosion hazard.
4. Connect jumper cables in the sequence
as illustrated (
* 1
?
* 2
?
* 3
?
* 4
).CAUTION . Always connect positive (+) to positive
(+) and negative ( − ) to body ground (as
illustrated) — not to the battery.
. Make sure the jumper cables do not
touch moving parts in the engine com-
partment and that clamps do not contact
any other metal.
5. Start the engine of the booster vehicle
* A
and let it run for a few minutes.
6. Keep the engine speed of the booster
vehicle
* A
at about 2,000 rpm, and
start the engine of the vehicle being
jump started
* B
.
CAUTION Do not keep the starter motor engaged for
more than 10 seconds. If the engine does
not start right away, push the ignition
switch to the OFF position and wait 10
seconds before trying again.
7. After starting your engine, carefully
disconnect the negative cable and then
In case of emergency
6-9

Black plate (411,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]Accelerator pedal: Check the pedal for
smooth operation and make sure the pedal
does not catch or require uneven effort.
Keep the floor mat away from the pedal.
Automatic transmission P (Park) mechan-
ism: On a fairly steep hill, check that your
vehicle is held securely with the selector
lever in the P (Park) position without
applying any brakes.
Brake pedal: Check the pedal for smooth
operation. If the brake pedal suddenly
goes down further than normal, the pedal
feels spongy or the vehicle seems to take
longer to stop, see an INFINITI retailer
immediately. Keep the floor mat away from
the pedal.
Brakes: Check that the brakes do not pull
the vehicle to one side when applied.
Parking brake: Check the parking brake
operation regularly. The vehicle should be
securely held on a fairly steep hill with only
the parking brake applied. If the parking
brake needs adjusted, see an INFINITI
retailer.
Seat belts: Check that all parts of the seat
belt system (for example, buckles, an-
chors, adjuster and retractors) operate
properly and smoothly, and are installed securely. Check the belt webbing for cuts,
fraying, wear or damage.
Seats: Check seat position controls such as
seat adjusters, seatback recliner, etc. to
ensure they operate smoothly and that all
latches lock securely in every position.
Check that the head restraints move up
and down smoothly and that the locks (if
so equipped) hold securely in all latched
positions.
Steering wheel: Check for changes in the
steering conditions, such as excessive free
play, hard steering or strange noises.
Warning lights and chimes: Make sure that
all warning lights and chimes are operating
properly.
Windshield defroster: Check that the air
comes out of the defroster outlets properly
and in sufficient quantity when operating
the heater or air conditioner.
Windshield wiper and washer*: Check that
the wipers and washer operate properly
and that the wipers do not streak.
Under the hood and vehicle GUID-29B64B94-E77F-40DC-A4B2-6B5D542860ED
The maintenance items listed here should
be checked periodically (for example, each
time you check the engine oil or refuel). Battery*: Check the fluid level in each cell.
It should be between the MAX and MIN
lines. Vehicles operated in high tempera-
tures or under severe condition require
frequent checks of the battery fluid level.
Brake fluid level*: Make sure that the
brake fluid level is between the MAX and
MIN lines on the reservoir.
Engine coolant level*: Check the coolant
level when the engine is cold.
Engine drive belts*: Make sure that no belt
is frayed, worn, cracked or oily.
Engine oil level*: Check the level after
parking the vehicle on a level spot and
turning off the engine. Wait more than 15
minutes for the oil to drain back into the oil
pan.
Exhaust system: Make sure there are no
loose supports, cracks or holes. If the
sound of the exhaust seems unusual or
there is a smell of exhaust fumes, im-
mediately have the exhaust system in-
spected by an INFINITI retailer. (See
“ Precautions when starting and driving ”
(P.5-3) for exhaust gas (Carbon monoxide).)
Fluid leaks: Check under the vehicle for
fuel, oil, water or other fluid leaks after the
vehicle has been parked for a while. Water
Maintenance and do-it-yourself
8-5

Black plate (421,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]GUID-7601D96E-EEDD-44AF-87A6-218F86572DA1
For further brake and clutch fluid informa-
tion, see “ Capacities and recommended
fuel/lubricants ” (P.9-2) of this manual.
WARNING. Use only new fluid from a sealed
container. Old, inferior or contaminated
fluid may damage the brake system. The
use of improper fluids can damage the
brake system and affect the vehicle ’ s
stopping ability.
. Clean the filler cap before removing.
. Brake fluid is poisonous and should be
stored carefully in marked containers out
of the reach of children.
CAUTIONDo not spill the fluid on painted surfaces.
This will damage the paint. If fluid is spilled,
wash the surface with water. SDI2025
BRAKE FLUID GUID-99026060-C0AC-4F76-8C26-6B47003C3E51
Check the fluid level in the reservoir. If the
fluid is below the MIN line
* 2
or the brake
warning light comes on, add Genuine
NISSAN Super Heavy Duty Brake Fluid or
equivalent DOT 3 fluid up to the MAX line
* 1
. If fluid must be added frequently, the
system should be checked by an INFINITI
retailer. SDI1906A
CLUTCH FLUID (if so equipped) GUID-27C4E9C5-6E75-49DB-A514-FE503E946A9F
Check the fluid level in the reservoir. If the
fluid level is below the MIN line
* 1
, add
Genuine NISSAN Super Heavy Duty Brake
Fluid or equivalent DOT 3 fluid up to the
MAX line
* 2
. If fluid must be added
frequently, the system should be checked
by an INFINITI retailer.
Maintenance and do-it-yourself
8-15BRAKE AND CLUTCH FLUID

Black plate (429,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]SDI2362
Be careful not to clog the washer nozzle
* A
. This may cause improper windshield
washer operation. If the nozzle is clogged,
remove any objects with a needle or small
pin
* B
. Be careful not to damage the
nozzle. GUID-32FB5E6D-5B48-42A8-9F60-83E657B04471
If the brakes do not operate properly, have
the brakes checked by an INFINITI retailer.
SELF-ADJUSTING BRAKES GUID-2D98160D-8918-4BF3-999B-F13E2922E177
Your vehicle is equipped with self-adjust-
ing brakes.
The disc-type brakes self-adjust every time
the brake pedal is applied.
WARNING See an INFINITI retailer for a brake system
check if the brake pedal height does not
return to normal.
BRAKE PAD WEAR WARNING GUID-0D7DECB1-F0F3-4C66-A768-32FE17341FFF
The disc brake pads have audible wear
warnings. When a brake pad requires
replacement, it will make a high pitched
scraping sound when the vehicle is in
motion. This scraping sound will first occur
only when the brake pedal is depressed.
After more wear of the brake pad, the
sound will always be heard even if the
brake pedal is not depressed. Have the
brakes checked as soon as possible if the
wear warning sound is heard.
Under some driving or climate conditions, occasional brake squeak, squeal or other
noise may be heard. Occasional brake
noise during light to moderate stops is
normal and does not affect the function or
performance of the brake system.
Proper brake inspection intervals should
be followed. For additional information,
see the maintenance log section of your
“ INFINITI Service and Maintenance Guide ”
for maintenance intervals.
Maintenance and do-it-yourself
8-23BRAKES

Black plate (448,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]8-42 Maintenance and do-it-yourself. The original tires have built-in
tread wear indicators. When wear
indicators are visible, the tire(s)
should be replaced.
. Tires degrade with age and use.
Have tires, including the spare,
over 6 years old checked by a
qualified technician, because
some tire damage may not be
obvious. Replace the tires as
necessary to prevent tire failure
and possible personal injury.
. Improper service of the spare tire
may result in serious personal
injury. If it is necessary to repair
the spare tire, contact an INFINITI
retailer.
. For additional information regard-
ing tires, refer to “ Important Tire
Safety Information ” (US) or “ Tire
Safety Information ” (Canada) in
the Warranty Information Booklet. Replacing wheels and tires GUID-4EF95767-87A1-46D1-823F-01023BAE60AA
When replacing a tire, use the same size,
tread design, speed rating and load carry-
ing capacity as originally equipped. (See
“ Specifications ” (P.9-8) for recommended
types and sizes of tires and wheels.)
WARNING . The use of tires other than those
recommended or the mixed use of tires
of different brands, construction (bias,
bias-belted or radial), or tread patterns
can adversely affect the ride, braking,
handling, ground clearance, body-to-tire
clearance, tire chain clearance, speed-
ometer calibration, headlight aim and
bumper height. Some of these effects
may lead to accidents and could result in
serious personal injury.
. If the wheels are changed for any
reason, always replace with wheels
which have the same off-set dimension.
Wheels of a different off-set could cause
premature tire wear, degrade vehicle
handling characteristics and/or interfer-
ence with the brake discs/drums. Such
interference can lead to decreased brak- ing efficiency and/or early brake pad/
shoe wear. See “ Wheels and tires ” (P.9-
9) of this manual for wheel off-set
dimensions.
. When a spare tire is mounted or a wheel
is replaced, the TPMS will not function
and the low tire pressure warning light
will flash for approximately 1 minute.
The light will remain on after 1 minute.
Contact your INFINITI retailer as soon as
possible for tire replacement and/or
system resetting.
. Replacing tires with those not originally
specified by INFINITI could affect the
proper operation of the TPMS.
. Do not install a damaged or deformed
wheel or tire even if it has been repaired.
Such wheels or tires could have struc-
tural damage and could fail without
warning.
. The use of retread tire is not recom-
mended.
. For additional information regarding
tires, refer to “ Important Tire Safety
Information ” (US) or “ Tire Safety Infor-
mation ” (Canada) in the Warranty Infor-
mation Booklet.

Black plate (477,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]GUID-126FA212-7CA0-4A46-8098-F063BF60E060
A vehicle equipped with All-Wheel Drive
(AWD) should never be tested using a two
wheel dynamometer (such as the dynam-
ometers used by some states for emissions
testing), or similar equipment. Make sure
you inform test facility personnel that your
vehicle is equipped with AWD before it is
placed on a dynamometer. Using the
wrong test equipment may result in trans-
mission damage or unexpected vehicle
movement which could result in serious
vehicle damage or personal injury.
Due to legal requirements in some states/
areas, your vehicle may be required to be
in what is called the “ ready condition ” for
an Inspection/Maintenance (I/M) test of
the emission control system.
The vehicle is set to the “ ready condition ”
when it is driven through certain driving
patterns. Usually, the “ ready condition ”
can be obtained by ordinary usage of the
vehicle.
If a powertrain system component is
repaired or the battery is disconnected,
the vehicle may be reset to a “ not ready
condition ” . Before taking the I/M test,
check the vehicle ’ s inspection/mainte-
nance test readiness condition. Place the
ignition switch in the ON position without starting the engine. If the Malfunction
Indicator Light (MIL) comes on steady for
20 seconds and then blinks for 10
seconds, the I/M test condition is “ not
ready ” . If the MIL does not blink after 20
seconds, the I/M test condition is “ ready ” .
Contact an INFINITI retailer to set the
“ ready condition ” or to prepare the vehicle
for testing. GUID-9C3875F5-7E59-4991-892A-95438AAA2114
This vehicle is equipped with an Event
Data Recorder (EDR). The main purpose of
an EDR is to record, in certain crash or
near crash-like situations, such as an air
bag deployment or hitting a road obstacle,
data that will assist in understanding how
a vehicle ’ s systems performed. The EDR is
designed to record data related to vehicle
dynamics and safety systems for a short
period of time, typically 30 seconds or
less. The EDR in this vehicle is designed to
record such data as:
. How various systems in your vehicle
were operating;
. Whether or not the driver and passen-
ger safety belts were buckled/fas-
tened;
. How far (if at all) the driver was
depressing the accelerator and/or
brake pedal; and,
. How fast the vehicle was traveling.
. Sounds are not recorded.
These data can help provide a better
understanding of the circumstances in
which crashes and injuries occur. NOTE:
EDR data are recorded by your vehicle only
if a nontrivial crash situation occurs; no
data are recorded by the EDR under normal
driving conditions and no personal data
Technical and consumer information
9-27READINESS FOR INSPECTION/
MAINTENANCE (I/M) TEST (US only) EVENT DATA RECORDERS (EDR)

Black plate (479,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]10 Index Number4 Wheel Active Steer (4WAS) system .................... 5-57
4 Wheel Active Steer (4WAS) warning light .......... 2-14
AABS (Anti-lock Braking System) ............................ 5-54
Advanced air bag system ..................................... 1-46
Air bag system
Advanced air bag system ................................ 1-46
Front passenger air bag and status light ......... 1-49
Front-seat mounted side-impact supplemental
air bag system ................................................ 1-52
Roof-mounted curtain side-impact
supplemental air bag system .......................... 1-52
Air bag warning labels ......................................... 1-55
Air bag warning light .................................. 1-55, 2-17
Air cleaner housing filter ...................................... 8-21
Air conditioner
Air conditioner service .................................... 4-41
Air conditioner specification label ................... 9-14
Air conditioning system refrigerant and
lubricant recommendations ..................... 4-41, 9-7
Automatic climate control ............................... 4-31
In-cabin microfilter .......................................... 4-40
Alarm, How to stop alarm (see vehicle
security system) ................................................... 2-29
Alcohol, drugs and driving ..................................... 5-8
All-wheel drive (AWD) ........................................... 5-45 All-wheel drive (AWD) driving
safety precautions ................................................. 5-8
All-wheel drive (AWD) warning light ..................... 2-12
Antenna ............................................................... 4-89
Anti-lock Braking System (ABS) ............................ 5-54
Anti-lock braking system (ABS) warning light ....... 2-13
Appearance care
Exterior appearance care ................................... 7-2
Interior appearance care ................................... 7-4
Armrest ................................................................ 1-13
Ashtrays (See cigarette lighter and ashtrays) ....... 2-44
Audible reminders ............................................... 2-19
Audio operation precautions ................................ 4-41
Audio system ....................................................... 4-41
Steering wheel audio controls ......................... 4-87
Autolight system .................................................. 2-35
Automatic
Automatic adjusting function
(front windows) ............................................... 2-54
Automatic climate control ..................... 4-32, 4-34
Automatic transmission fluid (ATF) .................. 8-14
Climate control ............................................... 4-31
Door locks ........................................................ 3-6
Drive positioner .............................................. 3-31
Driving with automatic transmission ............... 5-14
Moonroof ........................................................ 2-55
Seat positioner ............................................... 3-31
Average fuel consumption and speed ................... 2-26
Avoiding collision and rollover ............................... 5-6 B Battery ................................................................. 8-17
Battery saver system ...................................... 2-37
Intelligent Key ................................................. 8-26
Variable voltage control system ...................... 8-19
Before starting the engine ................................... 5-12
Belts (See drive belts) .......................................... 8-19
Bluetooth ®
hands-free phone system
(models with navigation system) .......................... 4-90
Bluetooth ®
hands-free phone system
(models without navigation system) ................... 4-100
Bluetooth ®
streaming audio ................................ 4-70
Brake
Anti-lock Braking System (ABS) ....................... 5-54
Brake and clutch fluid ..................................... 8-15
Brake fluid ...................................................... 8-15
Brake system .................................................. 5-51
Parking brake operation .................................. 5-20
Warning light .................................................. 2-13
Break-in schedule ................................................ 5-45
Brightness control
Display ON/OFF button ..................................... 4-9
Instrument panel ............................................ 2-38
Bulb check/instrument panel ............................... 2-12
Bulb replacement ................................................. 8-28

Black plate (481,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]Engine start operation indicator (Manual
Transmission models) ..................................... 2-23
If your vehicle overheats ................................. 6-10
Starting the engine ......................................... 5-13
Entry/exit function ............................................... 3-31
Event Data Recorders (EDR) .................................. 9-27
Exhaust gas (carbon monoxide) ............................. 5-3
FF.M.V.S.S./C.M.V.S.S. certification label ................ 9-13
Filter
Air cleaner housing filter ................................. 8-21
Changing engine oil and filter ......................... 8-11
Flashers (See hazard warning flasher switch) ....... 2-39
Flat tire .................................................................. 6-2
Flat towing ........................................................... 9-23
Floor mat cleaning ................................................. 7-5
Fluid
Automatic transmission fluid (ATF) .................. 8-14
Brake and clutch fluid ..................................... 8-15
Brake fluid ...................................................... 8-15
Capacities and
recommended fuel/lubricants ........................... 9-2
Engine coolant .................................................. 8-9
Engine oil ....................................................... 8-11
Power steering fluid ........................................ 8-14
Window washer fluid ...................................... 8-16
FM-AM-SAT radio with Compact Disc
(CD) player ........................................................... 4-57
Fog light switch ................................................... 2-39
Front passenger air bag and status light .............. 1-49 Front power seat adjustment .................................. 1-3
Front seat, Front seat adjustment ........................... 1-3
Front-seat active head restraints .......................... 1-12
Fuel
Capacities and
recommended fuel/lubricants ........................... 9-2
Fuel economy .................................................. 5-45
Fuel economy information (display) ................. 4-11
Fuel octane rating ............................................. 9-4
Fuel recommendation ........................................ 9-4
Fuel-filler cap .................................................. 3-23
Fuel-filler door ................................................ 3-23
Gauge ............................................................... 2-9
LOOSE FUEL CAP warning ................................ 3-25
Fuses ................................................................... 8-24
Fusible links ........................................................ 8-24
GGarage door opener, HomeLink ®
Universal Transceiver ........................................... 2-59
Gas cap ............................................................... 3-23
Gauge .................................................................... 2-6
Engine coolant temperature gauge .................... 2-8
Fuel gauge ........................................................ 2-9
Odometer .......................................................... 2-7
Speedometer .................................................... 2-7
Tachometer ....................................................... 2-8
Trip computer ................................................. 2-26
General maintenance ...................................... 8-3, 8-4
Glove box ............................................................ 2-47
Golf bag stowing ................................................. 2-51 H Hands-free phone system, Bluetooth ®
(models with navigation system) .......................... 4-90
Hands-free phone system, Bluetooth ®
(models without navigation system) ................... 4-100
Hazard warning flasher switch ............................. 2-39
Head restraints ...................................................... 1-9
Headlights
Bulb replacement ............................................ 8-30
Headlight switch ............................................. 2-35
Xenon headlights ............................................ 2-34
Heated seats ....................................................... 2-40
Heater, Automatic climate control ........................ 4-31
HomeLink ®
Universal Transceiver ......................... 2-59
Hood release ....................................................... 3-18
Hook, Coat hooks ................................................ 2-50
Horn .................................................................... 2-40
I Ignition switch
(Push-button) .................................................... 5-9
Manual transmission models .......................... 5-18
Immobilizer system .............................................. 2-30
In-cabin microfilter ............................................... 4-40
Indicator
Dot matrix display .......................................... 2-20
Lights ............................................................. 2-18
INFINITI Vehicle Immobilizer System ..................... 2-30
INFINITI voice recognition system ....................... 4-114
10-3