2019 INFINITI Q50 ECU

9-2Maintenance and schedules
Some day-to-day and regular maintenance
is essential to maintain your vehicle in good
mechanical condition, as well as its emission
and engine performance.
It is the owner’s responsibility to make sure
that the scheduled maintenance, as well as
general maintenance, is performed.
As the vehicle owner, you are the only one
who can ensure that your vehicle receives
the proper maintenance. You are a vital link
in the maintenance chain.
GENERAL MAINTENANCE
General maintenance includes those items
which should be checked during normal day-
to-day operation. They are essential for
proper vehicle operation. It is your respon-
sibility to perform these procedures regularly
as prescribed.
Performing general maintenance checks re-
quires minimal mechanical skill and only a
few general automotive tools.
These checks or inspections can be done by
yourself, a qualified technician or, if you
prefer, an INFINITI retailer.
SCHEDULED MAINTENANCE
The maintenance items listed in this section
are required to be serviced at regular inter-
vals. However, under severe driving condi-
tions, additional or more frequent
maintenance will be required.
WHERE TO GO FOR SERVICE
If maintenance service is required or your
vehicle appears to malfunction, have the
systems checked and serviced. It is recom-
mended you visit an INFINITI retailer for this
service.
INFINITI technicians are well-trained spe-
cialists and are kept up to date with the
latest service information through technical
bulletins, service tips and training programs.
They are completely qualified to work on
INFINITI vehiclesbeforework begins.
You can be confident that an INFINITI
retailer’s service department can perform
the service needed to meet the maintenance
requirements on your vehicle. During the normal day-to-day operation of
the vehicle, general maintenance should be
performed regularly as prescribed in this
section. If you detect any unusual sounds,
vibrations or smells, be sure to check for the
cause and have it checked promptly. In
addition, it is recommended you visit an
INFINITI retailer if you think that repairs are
required.
When performing any checks or mainte-
nance work, closely observe “Maintenance
precautions” (P.8-3) of this manual.
EXPLANATION OF GENERAL
MAINTENANCE ITEMS
Additional information on the following
items with “*” is found in the “8. Do-it-
yourself” section of this manual.
Outside the vehicle
The maintenance items listed here should be
performed from time to time, unless other-
wise specified.
Doors and engine hood:
Check that all doors
and the engine hood, operate properly. Also
ensure that all latches lock securely. Lubri-
cate hinges, latches, latch pins, rollers and
links if necessary. Make sure that the
secondary latch keeps the hood from open-
ing when the primary latch is released.
When driving in areas using road salt or
MAINTENANCE REQUIREMENT GENERAL MAINTENANCE

other corrosive materials, check lubrication
frequently.
Lights*:Clean the headlights on a regular
basis. Make sure that the headlights, stop
lights, tail lights, turn signal lights, and other
lights are all operating properly and installed
securely. Also check headlight aim.
Road wheel nuts (lug nuts)*: When checking
the tires, make sure no wheel nuts are
missing, and check for any loose wheel nuts.
Tighten if necessary.
Tire rotation*: Tires should be rotated every
5,000 miles (8,000 km). If your vehicle is
equipped with different sized tires in the
front and rear, tires cannot be rotated.
Tires*: Check the pressure with a gauge
often and always prior to long distance trips.
If necessary, adjust the pressure in all tires,
including the spare, to the pressure speci-
fied. Check carefully for damage, cuts or
excessive wear.
Tire Pressure Monitoring System (TPMS)
transmitter components: Replace the TPMS
transmitter grommet seal, valve core and
cap when the tires are replaced due to wear
or age.
Wheel alignment and balance: If the vehicle
should pull to either side while driving on a
straight and level road, or if you detect
uneven or abnormal tire wear, there may be
a need for wheel alignment. If the steering wheel or seat vibrates at
normal highway speeds, wheel balancing
may be needed.
For additional information regarding tires,
refer to “Important Tire Safety Information”
(US) or “Tire Safety Information” (Canada) in
the INFINITI Warranty Information Booklet.
Windshield:
Clean the windshield on a
regular basis. Check the windshield at least
every six months for cracks or other damage.
Have a damaged windshield repaired by a
qualified repair facility.
Windshield wiper blades*: Check for cracks
or wear if they do not wipe properly.
Inside the vehicle
The maintenance items listed here should be
checked on a regular basis, such as when
performing scheduled maintenance, cleaning
the vehicle, etc.
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 shift 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, have your vehicle checked immediately.
It is recommended you visit an INFINITI
retailer for this service. 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, it is recommended you
visit an INFINITI retailer for this service.
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.
Seat belts: Check that all parts of the seat
belt system (for example, buckles, anchors,
adjuster and retractors) operate properly
and smoothly, and are installed securely.
Check the belt webbing for cuts, fraying,
wear or damage.
Steering wheel: Check for changes in the
steering conditions, such as excessive free
play, hard steering or strange noises.
Maintenance and schedules9-3

for your vehicle. (See “Measurement
of weights” (P.10-21).)
Also check tires for proper inflation
pressures. See the Tire and Loading
Information label.
LOADING TIPS
.The GVW must not exceed GVWRor GAWR as specified on the F.M.
V.S.S./C.M.V.S.S. certification la-
bel.
.Do not load the front and rear axleto the GAWR. Doing so will exceed
the GVWR.
WARNING
.Properly secure all cargo to help
prevent it from sliding or shift-
ing. Do not place cargo higher
than the seatbacks. In a sudden
stop or collision, unsecured car-
go could cause personal injury.
.Do not load your vehicle any
heavier than the GVWR or the
maximum front and rear
GAWRs. If you do, parts of your vehicle can break, tire
damage could occur, or it can
change the way your vehicle
handles. This could result in loss
of control and cause personal
injury.
.Overloading could not only
shorten the life of your vehicle
and the tires, but also could
lead to hazardous vehicle hand-
ling and long braking distance.
This may cause a premature tire
malfunction, which could result
in a serious accident and perso-
nal injury. Failures caused by
overloading are not covered by
the vehicle’s warranty.
MEASUREMENT OF WEIGHTS
Secure loose items to prevent weight
shifts that could affect the balance of
your vehicle. When the vehicle is
loaded, drive to a scale and weigh
the front and the rear wheels sepa-
rately to determine axle loads. Indivi-
dual axle loads should not exceed
either of the gross axle weight ratings(GAWR). The total of the axle loads
should not exceed the gross vehicle
weight rating (GVWR). These ratings
are given on the vehicle certification
label. If weight ratings are exceeded,
move or remove items to bring all
weights below the ratings.
Technical and consumer information10-21

wwwapps.tc.gc.ca/Saf-Sec-Sur/7/
PCDB-BDPP/fc-cp.aspx?lang=fra
(French speakers).
Additional information concerning
motor vehicle safety may be obtained
from Transport Canada’s Road
Safety Information Centre at 1-
800-333-0371 or online at www.tc.
gc.ca/ roadsafety (English speakers)
or www.tc.gc.ca/securiteroutiere
(French speakers).
To notify INFINITI of any safety
concerns please contact our Consu-
mer Information Centre toll free at 1-
800- 361-4792.
WARNING
A vehicle equipped with Intelligent All-
Wheel Drive (AWD) 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 AWD before it is placed
on a dynamometer. Using the wrong test
equipment may result in transmission
damage or unexpected vehicle move-
ment 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 re-
paired or the battery is disconnected, the
vehicle may be reset to a “not ready condi-
tion”. Before taking the I/M test, check the
vehicle’s inspection/maintenance test readi- ness 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”.
It is recommended you visit an INFINITI
retailer to set the “ready condition” or to
prepare the vehicle for testing.
Technical and consumer information10-25
READINESS FOR INSPECTION/
MAINTENANCE (I/M) TEST (US only)

11 Index
A
ABS (Anti-lock Braking System) ................... 5-132
Active Lane Control ............................................ 5-26
Active noise cancellation ................................. 5-145
Active sound enhancement ............................ 5-145
Active trace control .......................................... 5-135
Air bag systemFront-seat mounted side-impact
supplemental air bag system ..................... 1-57
Roof-mounted curtain side-impact
supplemental air bag system ..................... 1-57
Air bag warning labels ....................................... 1-60
Air bag warning light .............................. 1-60, 2-15
Air cleaner housing filter ................................... 8-21
Air conditioner
Air conditioner specification label ......... 10-16
Air conditioning system refrigerant and
lubricant recommendations ..................... 10-10
Air deflectors ..................................................... 10-18
Alarm How to stop alarm (see vehicle
security system) ............................................. 2-31
Alcohol, drugs and driving ................................ 5-10
Antenna .................................................................... 4-3
Anti-lock Braking System (ABS) ................... 5-132
Appearance care
Exterior appearance care ............................... 7-2
Interior appearance care ................................ 7-5
Armrest ...................................................................... 1-7 Audible reminders ................................................ 2-18
Autolight system .................................................. 2-36
Automatic
Automatic Transmission Fluid (ATF) ....... 8-14
Driving with automatic transmission ....... 5-16
Automatic door locks ............................................ 3-6
Automatic drive positioner ............................... 3-33
Automatic seat positioner ................................ 3-33
Avoiding collision and rollover ............................ 5-9
B
Back-up Collision Intervention (BCI) .............. 5-62
Battery .................................................................... 8-16 Battery replacement, Intelligent Key ......... 3-2
Battery saver system .................................... 2-39
Intelligent Key ................................................. 8-26
Variable voltage control system ............... 8-19
Before starting the engine ................................ 5-14
Belts (See drive belts) ......................................... 8-19
Blind Spot Intervention
®(BSI) ......................... 5-49
Blind Spot Warning (BSW) ............................... 5-41
Brake
Anti-lock Braking System (ABS) ............. 5-132
Brake fluid ....................................................... 8-15
Brake force distribution ............................ 5-134
Brake system ................................................ 5-131
Parking brake operation .............................. 5-21
Brake warning light .............................................. 2-11
Break-in schedule .............................................. 5-123 Bulb check/instrument panel ........................... 2-10
Bulb replacement ................................................. 8-29
C
Capacities and
recommended fluids/lubricants ....................... 10-2
Car phone or CB radio ......................................... 4-4
Card holder ............................................................ 2-49
Catalytic converter
Three-way catalyst ......................................... 5-5
Changing intercooler coolant ........................... 8-10
Chassis and body maintenance ....................... 9-13
Chassis control ................................................... 5-137
Check tire pressure warning ............................. 2-22
Checking intercooler coolant level .................. 8-10
Child restraints ..................................................... 1-23 LATCH system ............................................... 1-26
Precautions on child restraints .................. 1-24
Child safety ............................................................ 1-21
Child safety rear door lock .................................. 3-6
Chimes Audible reminders .......................................... 2-18
Seat belt warning light and chime ............ 2-15
Circuit breaker Fusible link ....................................................... 8-25
Cleaning exterior and interior .................... 7-2, 7-5
Clock ...................................................................... 2-29
Coat hooks ............................................................ 2-50
Cockpit ...................................................................... 2-3

11-6
Reporting safety defects ................................ 10-24
Request switch (See Intelligent
Key system) ........................................................... 3-10
Roadside assistance program ............................. 6-2
Rollover ..................................................................... 5-9
RoofMoonroof ......................................................... 2-54
Run-flat tires .......................................................... 6-4
S
Safety Child seat belts ............................................... 1-21
Reporting safety defects .......................... 10-24
Seat adjustment
Front power seat adjustment ....................... 1-3
Front seats ......................................................... 1-3
Seat belt(s)
Child safety ..................................................... 1-21
Infants ............................................................... 1-22
Injured persons ............................................... 1-14
Larger children ............................................... 1-22
Precautions on seat belt usage ................. 1-12
Pre-crash seat belts with
comfort function ............................................ 1-14
Pregnant women ........................................... 1-14
Seat belt cleaning ............................................. 7-7
Seat belt extenders ....................................... 1-20
Seat belt maintenance ................................. 1-20
Seat belt warning light and chime ............ 2-15
Seat belts ......................................................... 1-12
Seat belts with pretensioners .................... 1-59 Shoulder belt height adjustment ............... 1-20
Small children .................................................. 1-22
Three-point type ............................................ 1-15
Seat(s)
Driver-side memory ...................................... 3-33
Heated seats ................................................... 2-43
Seats .................................................................... 1-2
Security system Vehicle security system ............................... 2-30
Security system (INFINITI Vehicle
Immobilizer System) Engine start ..................................................... 2-31
Shift lever
Shift lock release ........................................... 5-19
Shift lock release, Transmission ...................... 5-19
Shifting
Automatic transmission ............................... 5-16
Shoulder belt height adjustment ..................... 1-20
SNOW mode ......................................................... 5-23
Spare tire ............................................................. 10-12
Spark plugs ............................................................ 8-20
Speedometer ............................................................ 2-7
SPORT mode ........................................................ 5-23
SPORT+ mode ...................................................... 5-23
Standard maintenance .......................................... 9-7
STANDARD mode ............................................... 5-22
Starting
Before starting the engine .......................... 5-14
Jump starting .................................................. 8-19
Precautions when starting and driving ..... 5-4
Push starting ................................................... 6-16 Starting the engine ....................................... 5-15
Status light, Front passenger air bag ............ 1-50
Steering Direct Adaptive Steering ........................... 5-129
Heated steering wheel ................................. 2-45
Power steering fluid ..................................... 8-14
Power steering system ............................. 5-128
Tilt/telescopic steering ................................ 3-28
Storage ................................................................... 2-46
Storage box ........................................................... 2-49
Sun visors ............................................................... 3-30
Sunglasses holder ................................................ 2-48
Supplemental air bag warning labels ............. 1-60
Supplemental air bag warning light ... 1-60, 2-15
Supplemental restraint system ........................ 1-42 Precautions on supplemental
restraint system ............................................. 1-42
Switch Autolight switch ............................................. 2-36
Fog light switch ............................................. 2-42
Hazard warning flasher switch .................... 6-2
Headlight switch ............................................ 2-36
Ignition switch ................................................ 5-16
Power door lock switch ................................. 3-5
Rear window and outside mirror
defroster switch ............................................. 2-35
Turn signal switch ......................................... 2-41
Vehicle Dynamic Control (VDC)
off switch ......................................................... 2-43

T
Tachometer ............................................................. 2-8
Temperature gaugeEngine coolant temperature gauge ............ 2-8
Theft (INFINITI Vehicle Immobilizer System)
Engine start ..................................................... 2-31
Thigh extension ....................................................... 1-5
Three-way catalyst ................................................ 5-5
Tilt/telescopic steering ...................................... 3-28
Tire Flat Tire - Visit dealer warning ................. 2-22
Run-flat tires .................................................... 6-4
Tire replacement indicator .......................... 2-25
Tire rotation ................................................... 8-42
Tire pressure
Low tire pressure warning light ................ 2-12
Tire Pressure Low - Add Air warning ........... 2-22
Tires
Flat tire ............................................................... 6-3
Low tire pressure
warning system ........................... 5-5, 6-3, 8-33
Run-flat tires ................................................. 8-40
Spare tire ........................................................ 8-45
Tire and Loading
information label ............................. 8-35, 10-16
Tire chains ........................................................ 8-41
Tire dressing ...................................................... 7-4
Tire pressure ................................................... 8-33
Tire Pressure Monitoring
System (TPMS) ........................... 5-5, 6-3, 8-33 Types of tires .................................................. 8-39
Uniform tire quality grading .................... 10-22
Wheel/tire size ............................................ 10-12
Wheels and tires ............................................ 8-33
Towing Flat towing ................................................... 10-22
Tow truck towing .......................................... 6-17
Towing a trailer ........................................... 10-22
TPMS Tire Pressure
Monitoring System .................... 5-5, 6-3, 8-33
TPMS, Tire pressure monitoring system TPMS with Tire Inflation Indicator ............ 5-8
Trailer towing .................................................... 10-22
Transceiver HomeLink
®Universal Transceiver ............ 2-58
Transmission Automatic Transmission Fluid (ATF) ....... 8-14
Driving with automatic transmission ....... 5-16
Transmission shift lever lock release ....... 5-19
Transmitter (See remote keyless
entry system) ........................................................ 3-16
Traveling or registering in
another country ................................................ 10-14
Trip computer ....................................................... 2-27
Trip odometer ....................................................... 2-27
Trunk Interior trunk lid release .............................. 3-25
Light .................................................................. 2-57
Pass-through ..................................................... 1-7
Trunk hooks ................................................... 2-50 Trunk lid ........................................................... 3-23
Trunk lid release switch ............................... 3-24
Trunk open request switch ......................... 3-24
Trunk release power cancel switch .......... 3-25
Turn signal switch ............................................... 2-41
U
Underbody cleaning ............................................... 7-3
Uniform tire quality grading .......................... 10-22
V
Vanity mirror ......................................................... 3-33
Vanity mirror lights ............................................. 2-57
Variable voltage control system ..................... 8-19
Vehicle Dimensions ................................................... 10-13
Recovery (freeing a stuck vehicle) ............ 6-19
Vehicle Dynamic Control (VDC)
off switch ......................................................... 2-43
Vehicle dynamic control
(VDC) system ................................................ 5-133
Vehicle Dynamic Control (VDC)
warning light ................................................... 2-15
Vehicle identification number (VIN) ............ 10-14
Vehicle information display .............................. 2-19
Vehicle loading information ............................ 10-19
Vehicle security system ...................................... 2-30
Vehicle speedAverage speed ............................ 2-27
Ventilators ............................................................... 4-2
11-7