2011 INFINITI QX ECU

To access the trailer hitchA, remove the trailer
hitch cover located on the lower part of the rear
bumper.
To remove the trailer hitch cover:
1. Remove the 2 clips. 2. Pull the bottom of the cover straight back-
ward to remove the inner side and upper
clips.
WARNING
Trailer hitch components have specific weight
ratings. Your vehicle may be capable of towing
a trailer heavier than the weight rating of the
hitch components. Never exceed the weight
rating of the hitch components. Doing so can
cause serious personal injury or property
damage.
Hitch ball
Choose a hitch ball of the proper size and
weight rating for your trailer:
●The required hitch ball size is stamped on
most trailer couplers. Most hitch balls also
have the size printed on top of the ball.
● Choose the proper class hitch ball based on
the trailer weight.
● The diameter of the threaded shank of the
hitch ball must be matched to the ball mount
hole diameter. The hitch ball shank should
be no more than 1/16 smaller than the hole
in the ball mount. ●
The threaded shank of the hitch ball must be
long enough to be properly secured to the
ball mount. There should be at least 2
threads showing beyond the lock washer
and nut.
Ball mount
The hitch ball is attached to the ball mount and
the ball mount is inserted into the hitch re-
ceiver. Choose a proper class ball mount based
on the trailer weight. Additionally, the ball
mount should be chosen to keep the trailer
tongue level with the ground.
Weight carrying hitches
A weight carrying or “dead weight” ball mount
is one that is designed to carry the whole
amount of tongue weight and gross weight
directly on the ball mount and on the receiver.
Weight distribution hitch
This type of hitch is also called a “load-leveling”
or “equalizing” hitch. A set of bars attach to the
ball mount and to the trailer to distribute the
tongue weight (hitch weight) of your trailer.
Many vehicles cannot carry the full tongue
weight of a given trailer, and need some of the
tongue weight transferred through the frame
and pushing down on the front wheels. This
gives stability to the tow vehicle.STI0804
9-22Technical and consumer information

Several types of braking systems are available.
Surge Brakes -The surge brake actuator is
mounted on the trailer tongue with a hydraulic
line running to each trailer wheel. Surge brakes
are activated by the trailer pushing against the
hitch ball when the tow vehicle is braking.
Hydraulic surge brakes are common on rental
trailers and some boat trailers. In this type of
system, there is no hydraulic or electric connec-
tion for brake operation between the tow ve-
hicle and the trailer.
Electric Trailer Brakes - Electric braking systems
are activated by an electronic signal sent from a
trailer brake controller (special brake sensing
module).
Have a professional supplier of towing equip-
ment make sure the trailer brakes are properly
installed and demonstrate proper brake func-
tion testing.
WARNING
Never connect a trailer brake system directly to
the vehicle brake system.
Pre-towing tips
● Be certain your vehicle maintains a level
position when a loaded or unloaded trailer is
hitched. Do not drive the vehicle if it has an
abnormal nose-up or nose-down condition;
check for improper tongue load, overload,
worn suspension or other possible causes of
either condition.
● Always secure items in the trailer to prevent
load shift while driving.
● Keep the cargo load as low as possible in the
trailer to keep the trailer center of gravity
low.
● Load the trailer so approximately 60% of the
trailer load is in the front half and 40% is in
the back half. Also make sure the load is
balanced side to side.
● Check your hitch, trailer tire pressure, ve-
hicle tire pressure, trailer light operation,
and trailer wheel lug nuts every time you
attach a trailer to the vehicle.
● Be certain your rearview mirrors conform to
all federal, state or local regulations. If not,
install any mirrors required for towing before
driving the vehicle.
● Determine the overall height of the vehicle
and trailer so the required clearance is
known.
Trailer towing tips
In order to gain skill and an understanding of
the vehicle’s behavior, you should practice turn-
ing, stopping and backing up in an area which
is free from traffic. Steering stability, and brak-
ing performance will be somewhat different
than under normal driving conditions.
● Always secure items in the trailer to prevent
load shift while driving.
● Lock the trailer hitch coupler with a pin or
lock to prevent the coupler from inadver-
tently becoming unlatched.
● Avoid abrupt starts, acceleration or stops.
● Avoid sharp turns or lane changes.
● Always drive your vehicle at a moderate
speed. Some states or provinces have spe-
cific speed limits for vehicles that are towing
trailers. Obey the local speed limits.
● When backing up, hold the bottom of the
steering wheel with one hand. Move your
hand in the direction in which you want the
trailer to go. Make small corrections and
back up slowly. If possible, have someone
guide you when you are backing up.
Technical and consumer information9-25

Additional information concerning motor
vehicle safety may be obtained from
Transport Canada’s Road Safety Informa-
tion Centre at 1-800-333-0371 or online at
www.tc.gc.ca/roadsafety (English speak-
ers) or www.tc.gc.ca/securiteroutiere
(French speakers).
To notify INFINITI of any safety concerns
please contact our Consumer Informa-
tion Centre toll free at 1-800-361-4792.
A vehicle equipped with Four-Wheel Drive (4WD)
should never be tested using a two wheel
dynamometer (such as the dynamometers used
by some states for emissions testing), or similar
equipment. Make sure you inform test facility
personnel that your vehicle is equipped with
4WD before it is placed on a dynamometer.
Using the wrong test equipment may result in
transmission damage or unexpected vehicle
movement which could result in serious vehicle
damage or personal injury.
Due to legal requirements in some states and
Canadian Provinces, your vehicle may be re-
quired 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/maintenance test readiness condi-
tion. 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 “ready condi-
tion” or to prepare the vehicle for testing.
READINESS FOR INSPECTION/
MAINTENANCE (I/M) TEST
Technical and consumer information9-31

10 Index
A
ABS (Anti-lock Braking System) .......5-97
Adaptive front lighting system (AFS) ....2-40
Advanced air bag system ...........1-55
Aiming control Adaptive front lighting system (AFS) . . 2-40
Headlights ................. 2-39
Air bag system Advanced air bag system .........1-55
Front passenger air bag and status
light ..................... 1-57
Front-seat mounted side-impact
supplemental air bag system ......1-60
Roof-mounted curtain side-impact and
rollover supplemental air bag system . . 1-60
Air bag warning labels ............1-63
Air bag warning light ..........1-63, 2-16
Air cleaner housing filter ...........8-18
Air conditioner Advanced Climate Control System
(ACCS) ................... 4-35
Air conditioner service ..........4-40
Air conditioner specification label ....9-12
Air conditioning system refrigerant and
lubricant recommendations .....4-40, 9-7
Automatic climate control .....4-31, 4-34
In-cabin microfilter ............4-39
Alarm, How to stop alarm
(see vehicle security system) .........2-31
Alcohol, drugs and driving ...........5-8
Antenna .................... 4-82Anti-lock Braking System (ABS)
.......5-97
Anti-lock braking system (ABS) warning
light ....................... 2-11
Appearance care Exterior appearance care ..........7-2
Interior appearance care ..........7-4
Armrest ..................... 1-16
Around View™ Monitor ............4-19
Audible reminders ............... 2-20
Audio operation precautions .........4-40
Audio system ................. 4-40
Steering wheel audio controls ......4-81
Auto closure .................. 3-23
Autolight system ................ 2-37
Automatic Automatic transmission fluid (ATF) ....8-11
Climate control ........... 4-31,
4-34
Door locks ..................3-5
Drive positioner .............. 3-30
Driving with automatic transmission . . . 5-15
Moonroof .................. 2-64
Seat positioner .............. 3-30
Average fuel consumption and speed ....2-27
Avoiding collision and rollover ........5-6
B
Back door (See lift gate) ...........3-19
Battery ..................... 8-15
Battery saver system ........2-39, 2-66
Intelligent Key ............... 8-24
Variable voltage control system .....8-16 Before starting the engine
..........5-13
Belts (See drive belts) .............8-17
Blind Spot Warning (BSW) system . . . . . . 5-29
Blind Spot Warning (BSW) system warning
light ....................... 2-12
Bluetooth Hands-Free Phone System . . . 4-96
Booster seats ................. 1-47
Brake Anti-lock Braking System (ABS) . ....5-97
Brake booster ............... 8-21
Brake fluid .............. 8-12, 8-13
Brake system ............... 5-94
Parking brake operation .........5-19
Warning light ................ 2-12
Break-in schedule ............... 5-83
Brightness control Display ON/OFF button ...........4-7
Instrument panel .............. 2-41
Bulb check/instrument panel .........2-11
Bulb replacement ............... 8-26
C
Cabin air filter ................. 4-39
Capacities and recommended
fuel/lubricants .................9-2
Car phone or CB radio ............4-95
Cargo floor box ................ 2-60
Cargo light ................... 2-68
Catalytic converter, Three way catalyst ....5-2
CD/CF/USB memory care and cleaning . . . 4-80
Center
multi-function control panel . . ....4-3

Seat belt warning light and chime....2-16
Seat belts .................. 1-18
Seat belts with pretensioners .......1-62
Small children ................ 1-29
Three-point type ............... 1-22
Seat(s) Climate controlled seats ..........2-46
Driver-side memory ............3-30
Heated seats ................ 2-44
Seats .....................1-2
Security system, Vehicle security system . . 2-29
Security system (INFINITI Vehicle Immobilizer
System), Engine start .............. 2-31
Selector lever, Shift lock release .......5-18
Servicing climate control ...........4-40
SETTING button ................. 4-11
Shift lock release Transmission ................ 5-18
Shifting, Automatic transmission .......5-15
SNOW mode ................... 5-93
Snow mode switch ............... 2-49
Spare tire ................. 8-38, 9-9
Spark plugs ................... 8-17
Speedometer ...................2-6
Starting Before starting the engine .........5-13
Jump starting ................ 6-11
Precautions when starting and driving . . 5-2
Push starting ................ 6-13
Starting the engine ............. 5-13
STATUS button ..................4-7
Status light, Front passenger air bag .....1-57
Steering Heated steering wheel ...........2-43
Power steering fluid ............8-12
Power steering system ...........5-94Steering lock release malfunction
indicator
................... 2-23
Steering-wheel-mounted controls for
audio ..................... 4-81
Tilt/telescopic steering ..........3-26
Storage ..................... 2-54
Sun visors .................... 3-26
Sunglasses
holder............... 2-56
Supplemental air bag warning labels .....1-63
Supplemental air bag warning light . . 1-63, 2-16
Supplemental restraint system ........1-50
Precautions on supplemental restraint
system .................... 1-50
Switch Autolight switch .............. 2-37
Fog light switch ............... 2-42
Hazard warning flasher switch ......2-43
Headlight aiming control .........2-39
Headlight switch .............. 2-37
Ignition switch ................ 5-15
Intelligent Brake Assist (IBA) OFF
switch .................... 2-50
Power door lock switch ...........3-5
Snow mode switch ............. 2-49
Turn signal switch ............. 2-42
Vehicle dynamic control (VDC) off
switch .................... 2-51
T
2nd row seat .................. 2-55
3rd row seat .................. 2-56
Tachometer ....................2-7
Temperature gauge, Engine coolant
temperature gauge ................2-7 Theft (INFINITI Vehicle Immobilizer System),
Engine start
................... 2-31
Three-way catalyst ................5-2
Tilt/telescopic steering ............3-26
Tire Pressure, Low tire pressure warning
light ..................... 2-14
Tire replacement indicator . . . ......2-25
Tires Flat tire ....................6-2
Low tire pressure warning system .....5-3
Tire and Loading information label . 8-31, 9-11
Tire chains ................. 8-35
Tire dressing .................7-4
Tire pressure ................ 8-29
Tire pressure information (display) ....4-9
Tire pressure monitoring system
(TPMS) .................. 5-3, 6-2
Tire rotation ................. 8-36
Types of tires ................ 8-35
Uniform tire quality grading ........9-28
Wheel/tire

size ................9-9
Wheels and tires .............. 8-29
Top Tether strap child restraints ........1-34
Touch screen ...................4-4
Tow mode .................... 5-93
Tow mode switch ................ 2-49
Towing Flat towing ................. 9-28
Tow truck towing .............. 6-14
Towing a trailer ............... 9-17
Towing safety ................ 9-21
TPMS, Tire pressure monitoring system ....5-3
TPMS with Tire Inflation Indicator . . . . . 5-5
TPMS, Tire pressure warning system .....6-2
10-6

Trailer towing.................. 9-17
Transceiver, HomeLink Universal
Transceiver ................... 2-68
Transmission Automatic transmission fluid (ATF) ....8-11
Driving with automatic transmission . . . 5-15
Transmission selector lever lock
release .................... 5-18
Transmitter
(See remote keyless entry system) ......3-15
Traveling or registering your vehicle in
another country .................9-9
Trip computer .................. 2-27
Trip odometer .................. 2-27
Turn signal switch ............... 2-42
U
Underbody cleaning ...............7-3
Uniform tire quality grading ..........9-28
USB memory operation ............4-61
V
Vanity mirror .................. 3-30
Vanity mirror lights .............. 2-68
Variable voltage control system ........8-16
Vehicle Dimensions ..................9-9
Identification number (VIN) ........9-10
Loading information ............9-12
Recovery (freeing a stuck vehicle) .....6-17
Security system ............... 2-29Vehicle dynamic control (VDC) off
switch
.................... 2-51
Vehicle dynamic control (VDC) system . . 5-98
Vehicle dynamic control (VDC) warning
light ..................... 2-17
Vehicle information and settings
(display) ....................4-7
Ventilators ................... 4-30
Voice command (INFINITI voice recognition
system) ................. 4-112, 4-122
Voice recognition system ...........4-106
Voice recognition, Alternate command
mode ...................... 4-119
Voltmeter .....................2-9
W
Warning Check tire pressure warning .......2-24
Dot matrix display ............. 2-21
Hazard warning flasher switch ......2-43
Lane departure warning (LDW) system . . 5-20
Lights ..................... 2-11
Loose fuel cap warning ..........2-24
Tire
pressure monitoring system
(TPMS) .................. 5-3, 6-2
Warning/indicator lights and audible
reminders .................. 2-10
Warning labels, Air bag warning labels . . . 1-63
Warning light 4WD warning light ............. 5-89
Air bag warning light .........1-63, 2-16
Anti-lock braking system (ABS) warning
light ...................... 2-11
Brake warning light ............. 2-12Intelligent Key warning light
........2-14
Lane departure warning light . . . . . . . 2-14
Low tire pressure warning light . .....2-14
Seat belt warning light and chime ....2-16
Warranty, Emission control system
warranty ..................... 9-29
Washer switch Rear window wiper and washer
switch .................... 2-34
Windshield wiper and washer switch . . . 2-32
Washing ......................7-2
Waxing ......................7-3
Welcome light .................. 2-65
Wheel/tire size ..................9-9
Wheels and tires ................ 8-29
Care of wheels ................7-3
Cleaning aluminum alloy wheels . . . . . . 7-4
Window washer fluid .............. 8-14
Window(s) Cleaning ....................7-3
Power windows ............... 2-61
Windshield wiper and washer switch .....2-32
Wiper Rain-sensing auto wiper system .....2-33
Rear window wiper and washer
switch .................... 2-34
Windshield wiper and washer switch . . . 2-32
Wiper blades ................ 8-19
X
Xenon headlights ................ 2-36
10-7