2014 INFINITI Q50 check engine

8-18Maintenance and do-it-yourself
loose, have it replaced or adjusted by
an INFINITI retailer.
2. Have the belts checked regularly for condition and tension in accordance
with the maintenance schedule in your
“INFINITI Service and Maintenance
Guide”.WARNING
Be sure the engine and the ignition switch
are off and that the parking brake is
engaged securely.
CAUTION
Be sure to use the correct socket to remove
the spark plugs. An incorrect socket can
damage the spark plugs.
SDI2020
REPLACING SPARK PLUGS
If replacement is required, see an INFINITI
retailer for servicing.
Iridium-tipped spark plugs
It is not necessary to replace the iridium-
tipped spark plugs as frequently as the
conventional type spark plugs since they
will last much longer. Follow the main-
tenance schedule in “INFINITI Service and
Maintenance Guide” , but do not reuse
them by cleaning or regapping.
SPARK PLUGS

8-22Maintenance and do-it-yourself
JVM0255X
ENGINE COMPARTMENT
CAUTION
Never use a fuse of a higher or lower
amperage rating than that specified on the
fuse box cover. This could damage the
electrical system or cause a fire.
If any electrical equipment does not
operate, check for an open fuse.
1. Be sure the ignition switch is pushed tothe OFF or LOCK position and the
headlight switch is turned to OFF. 2. Open the engine hood.
3. Remove the fuse/fusible link holder
cover.
4. Remove the fuse with the fuse puller.
SDI1754
5. If the fuse is open*A, replace it with a
new fuse
*B. Spare fuses are stored in
the passenger compartment fuse box.
6. If a new fuse also opens, have the electrical system checked and repaired
by an INFINITI retailer.
Fusible links
If any electrical equipment does not
operate and fuses are in good condition,
check the fusible links. If any of these
fusible links are melted, replace only with
genuine INFINITI parts.
FUSES

9-6Technical and consumer information
above symptoms are encountered, have
your vehicle checked at an INFINITI retailer
or other competent service facility.
However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is no
cause for concern, because you get the
greatest fuel benefit when there is light
spark knock for a short time under heavy
engine load.
JVT0159X
1. API certification mark
2. API service symbol
ENGINE OIL AND OIL FILTER RE-
COMMENDATION
Selecting the correct oil
It is essential to choose the correct grade,
quality, and viscosity engine oil to ensure
satisfactory engine life and performance,
see“Capacities and recommended fuel/
lubricants” (P.9-2). INFINITI recommends
the use of an energy conserving oil in
order to improve fuel economy.
Select only engine oils that meet the American Petroleum Institute (API) certifi-
cation or International Lubricant Standar-
dization and Approval Committee (ILSAC)
certification and SAE viscosity standard.
These oils have the API certification mark
on the front of the container. Oils which do
not have the specified quality label should
not be used as they could cause engine
damage.
Oil additives
INFINITI does not recommend the use of oil
additives. The use of an oil additive is not
necessary when the proper oil type is used
and maintenance intervals are followed.

9-22Technical and consumer information
online at:
https://wwwapps.tc.gc.ca/Saf-Sec-
Sur/7/PCDB-BDPP/Index.aspx.
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 con-
cerns please contact our Consumer
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
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 readycondition”
. 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.
READINESS FOR INSPECTION/
MAINTENANCE (I/M) TEST (US only)

10 Index
A
ABS (Anti-lock Braking System) ....................... 5-107
Active Lane Control ........................................... 5-24
Active trace control ......................................... 5-110
Air bag systemFront-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, 2-16
Air cleaner housing filter ................................... 8-19
Air conditioner Air conditioner specification label ................ 9-13
Air conditioning system refrigerant and
lubricant recommendations ............................ 9-7
Air deflectors .................................................... 9-15
Alarm How to stop alarm (see vehicle
security system) ........................................... 2-32
Alcohol, drugs and driving .................................. 5-9
Antenna .............................................................. 4-3
Anti-lock Braking System (ABS) ....................... 5-107
Appearance care Exterior appearance care ................................ 7-2
Interior appearance care ................................ 7-5
Armrest ............................................................... 1-7
Ashtrays ........................................................... 2-44
Audible reminders ............................................ 2-19
Autolight system ............................................... 2-37 Automatic
Automatic transmission fluid (ATF) ............... 8-12
Driving with automatic transmission ............ 5-15
Automatic door locks .......................................... 3-5
Automatic drive positioner ................................ 3-29
Automatic moonroof.......................................... 2-52
Automatic seat positioner ................................. 3-29
Average speed .................................................. 2-28
Avoiding collision and rollover ............................ 5-8
B
Back-up Collision Intervention (BCI) system ....... 5-48
Battery .............................................................. 8-15
Battery replacement, Intelligent Key ............... 3-2
Battery saver system ................................... 2-40
Intelligent Key .............................................. 8-24
Variable voltage control system ................... 8-17
Before starting the engine ................................ 5-13
Belts (See drive belts) ....................................... 8-17
Blind Spot Warning (BSW) system/Blind Spot
Intervention
TM(BSI) system ............................... 5-37
Brake
Anti-lock Braking System (ABS) .................. 5-107
Brake fluid ................................................... 8-13
Brake force distribution ............................. 5-109
Brake system ............................................. 5-106
Parking brake operation ............................... 5-20
Brake warning light ........................................... 2-13
Break-in schedule ............................................. 5-99 Bulb check/instrument panel ............................ 2-12
Bulb replacement .............................................. 8-26
C
Capacities and recommended fuel/lubricants ...... 9-2
Car phone or CB radio ........................................ 4-3
Card holder ....................................................... 2-47
Catalytic converter Three-way catalyst ......................................... 5-4
Chassis control ............................................... 5-112
Check tire pressure warning .............................. 2-23
Child restraints ................................................. 1-24 LATCH system .............................................. 1-26
Precautions on child restraints ..................... 1-24
Child safety ...................................................... 1-22
Child safety rear door lock .................................. 3-6
Chimes Audible reminders ....................................... 2-19
Seat belt warning light and chime ............... 2-16
Circuit breaker Fusible link .................................................. 8-22
Cleaning exterior and interior ....................... 7-2, 7-5
Clock ............................................................... 2-30
Coat hooks ....................................................... 2-48
Cockpit ............................................................... 2-3
Cold weather driving ....................................... 5-112
Compact spare tire ........................................... 8-40
Compass ............................................................. 2-9
Console box ...................................................... 2-47

10-2
CoolantCapacities and
recommended fuel/lubricants ........................ 9-2
Changing engine coolant ............................... 8-9
Checking engine coolant level ........................ 8-9
Corrosion protection ........................................... 7-7
Courtesy light ................................................... 2-56
Cruise control ................................................... 5-56 Fixed speed cruise control (on ICC system) ... 5-74
Intelligent Cruise Control (ICC) system .......... 5-58
Cruise indicator ................................................ 2-24 Cup holders ...................................................... 2-45
Current fuel consumption .................................. 2-28
D
Daytime running light system ........................... 2-40
Defroster switch Rear window and outside mirror
defroster switch ........................................... 2-36
Dimensions ....................................................... 9-10
Direct Adaptive Steering ................................. 5-104
Distance Control Assist (DCA) system ................ 5-79
Distance to empty ............................................. 2-28
Drive belts ........................................................ 8-17
Drive positioner ................................................ 3-29
Driver assist system indicator ........................... 2-25
Driving
Cold weather driving .................................. 5-112
Driving with automatic transmission ............ 5-15
Precautions when starting and driving ........... 5-3
E
ECO drive indicator light ................................... 2-17
ECO mode ......................................................... 5-22
ECO pedal system ............................................. 5-22
EconomyFuel ........................................................... 5-100
Elapsed time ..................................................... 2-28
Elapsed time and trip odometer ........................ 2-28
Emission control information label .................... 9-12
Emission control system warranty ..................... 9-20
Engine
Before starting the engine ........................... 5-13
Break-in schedule ........................................ 5-99
Capacities and
recommended fuel/lubricants ........................ 9-2
Changing engine coolant ............................... 8-9
Changing engine oil and filter ...................... 8-10
Checking engine coolant level ........................ 8-9
Checking engine oil level ............................. 8-10
Coolant temperature gauge ............................ 2-8
Emergency engine shut off ........................... 5-12
Engine block heater ................................... 5-113
Engine compartment check locations ............. 8-6
Engine cooling system ................................... 8-8
Engine oil .................................................... 8-10
Engine oil and filter replacement indicator ... 2-26
Engine oil and oil filter recommendation ........ 9-6
Engine oil viscosity ........................................ 9-7
Engine serial number ................................... 9-12
Engine specifications ..................................... 9-8 Engine start operation indicator ................... 2-22
If your vehicle overheats .............................. 6-12
Starting the engine ...................................... 5-14
Engine coolant temperature gauge ...................... 2-8
Entry/exit function Automatic drive positioner ........................... 3-29
Event Data Recorders (EDR) ............................... 9-23
Exhaust gas (carbon monoxide) .......................... 5-3
F
F.M.V.S.S./C.M.V.S.S. certification label ............. 9-12
Filter
Air cleaner housing filter .............................. 8-19
Changing engine oil and filter ...................... 8-10
Flashers (See hazard warning flasher switch) ...... 6-2
Flat tire ............................................................... 6-3
Flat Tire - Visit dealer warning .......................... 2-23
Flat towing ........................................................ 9-19
Floor mat cleaning .............................................. 7-6
Floor mat positioning aid .................................... 7-6
Fluid
Automatic transmission fluid (ATF) ............... 8-12
Brake fluid ................................................... 8-13
Capacities and
recommended fuel/lubricants ........................ 9-2
Engine coolant ............................................... 8-8
Engine oil .................................................... 8-10
Power steering fluid ..................................... 8-13
Window washer fluid ................................... 8-14
Fog light switch ................................................ 2-42
Forward emergency braking system .................. 5-89

OilCapacities and
recommended fuel/lubricants ........................ 9-2
Changing engine oil and filter ...................... 8-10
Checking engine oil level ............................. 8-10
Engine oil .................................................... 8-10
Engine oil viscosity ........................................ 9-7
One touch unlock sensor (See Intelligent
Key system) ........................................................ 3-9
Operation Indicators for operation ............................... 2-22
Outside air temperature .................................... 2-30
Outside mirrors ................................................. 3-27
Overheat, If your vehicle overheats ................... 6-12
Owner’s Manual/Service Manual
order information .............................................. 9-23
P
Panic alarm ...................................................... 3-16
Parking Parking brake operation ............................... 5-20
Parking on hills ......................................... 5-103
Parking brake break-in .................................... 5-106
Personal lights .................................................. 2-54
PERSONAL mode ............................................... 5-23
Phone
Car phone or CB radio ................................... 4-3
Power Power door lock ............................................. 3-4
Power outlet ................................................ 2-44
Power steering fluid ..................................... 8-13 Power steering system ............................... 5-104
Power windows ............................................ 2-49
Precautions Braking precautions ................................... 5-106
Child restraints ............................................ 1-24
Cruise control .............................................. 5-56
Maintenance .................................................. 8-5
Seat belt usage ........................................... 1-12Supplemental restraint system ..................... 1-42
When starting and driving .............................. 5-3
Pre-crash seat belts with comfort function ........ 1-14
Predictive forward collision warning system ...... 5-94
Push starting .................................................... 6-11
Push-button ignition switch .............................. 5-10
R
Radio Car phone or CB radio ................................... 4-3
Rain-sensing auto wiper system ........................ 2-35
Rapid air pressure loss ....................................... 5-9
Readiness for inspection/maintenance (I/M) test
(US only) .......................................................... 9-22 Rear door lock Child safety rear door lock ............................. 3-6
Rear seats .......................................................... 1-5
Rear window and outside mirror
defroster switch ................................................ 2-36
Recorders Event data ................................................... 9-23
Registering your vehicle in another country ...... 9-11
Remote keyless entry system ............................ 3-14 Reporting safety defects ................................... 9-21
Request switch (See Intelligent Key system) ........ 3-9
Roadside assistance program ............................. 6-2
Rollover .............................................................. 5-8
Roof
Moonroof ..................................................... 2-52
Run-flat tires ....................................................... 6-4
S
Safety
Child seat belts ........................................... 1-22
Reporting safety defects .............................. 9-21
Seat adjustment Front power seat adjustment .......................... 1-3
Front seats ..................................................... 1-3
Seat belt(s) Child safety ................................................. 1-22
Infants ......................................................... 1-23
Injured persons ........................................... 1-14Larger children ............................................. 1-23
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 ...................................... 1-21
Seat belt maintenance ................................. 1-21
Seat belt warning light and chime ............... 2-16
Seat belts .................................................... 1-12
Seat belts with pretensioners ...................... 1-54
Shoulder belt height adjustment .................. 1-20
Small children ............................................. 1-23
10-5