check engine light INFINITI QX50 2020 Service Manual

CAUTION
∙ INFINITI recommends using GenuineNISSAN CVT Fluid NS-3 (or equivalent)
ONLY in INFINITI CVTs. Do not mix with
other fluids.
∙ Do not use Automatic Transmission Fluid (ATF) or manual transmission fluid in an
INFINITI CVT, as it may damage the CVT.
Damage caused by the use of fluids other
than as recommended is not covered un-
der INFINITI’s New Vehicle Limited
Warranty.
∙ Using fluids that are not equivalent to Genuine NISSAN CVT Fluid NS-3 may
also damage the CVT. Damage caused by
the use of fluids other than as recom-
mended is not covered under INFINITI’s
New Vehicle Limited Warranty.
When checking or replacement of CVT fluid is
required, it is recommended that you visit an
INFINITI retailer for this service.
WARNING
∙ Use only new fluid from a sealed con- tainer. 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 reach of children.
CAUTION
Do not spill the fluid on any painted sur-
faces. This will damage the paint. If fluid is
spilled, immediately wash the surface with
water.
Check the fluid level in the reservoir. If the
brake fluid is below the MIN line
B, the brake
warning light will illuminate. Add brake fluid
up to the MAX line
A. For additional infor-
mation on the recommended type of brake
fluid, refer to “Recommended
fluids/lubricants and capacities” in the “Tech-
nical and consumer information” section of
this manual.
If the brake fluid must be added frequently,
the brake system should be thoroughly
checked. It is recommended that you visit an
INFINITI retailer for this service.
For additional information on the location of
the brake fluid reservoir, refer to “Engine
compartment check locations” in this section.
LDI3161
CONTINUOUSLY VARIABLE
TRANSMISSION (CVT) FLUID BRAKE FLUID
8-10Do-it-yourself

If the brakes do not operate properly, it is
recommended that you have the brakes
checked. It is recommended that you visit an
INFINITI retailer for this service.
Self-adjusting brakes
Your vehicle is equipped with self-adjusting
brakes.
The front and rear disc-type brakes self-
adjust every time the brake pedal is applied.
WARNING
Have your brake system checked if the
brake pedal height does not return to nor-
mal. It is recommended that you visit an
INFINITI retailer for this service.
Brake pad wear indicators
The disc brake pads on your vehicle have
audible wear indicators. When a brake pad
requires replacement, a high pitched scraping
or screeching sound will be heard when the
vehicle is in motion. The noise will be heard
whether or not the brake pedal is depressed.
Have the brakes checked as soon as possible
if the wear indicator sound is heard.Under some driving or climate conditions, oc-
casional 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 regard-
ing brake inspections, refer to the appropri-
ate maintenance schedule information in the
"Maintenance and schedules" section of this
manual.
If any electrical equipment does not operate,
check for an open fuse.
Fuses are used in the passenger and engine
compartment. Spare fuses are provided and
can be found in the passenger compartment
fuse box.
When installing a fuse make sure the fuse is
installed in the fuse box securely.
LDI2997
BRAKES FUSES
8-18Do-it-yourself

ENGINE COMPARTMENT
WARNING
Never use a fuse of higher or lower amper-
age rating than that specified on the fuse
box cover. This could damage the electrical
system or electronic control units or cause a
fire.If any electrical equipment does not come on,
check for an open fuse.
1. Be sure the ignition switch and the head- light switch are OFF.
2. Open the engine hood.
3. Remove the fuse box cover by pushing the tabs and lifting the cover up.
4. Remove the fuse with the fuse puller. The fuse puller is located in the fuse
block in the passenger compartment.
5. If the fuse is open
A, replace it with a
new fuse
B.
6. If a new fuse also opens, have the elec- trical system checked and repaired. It is
recommended that you visit an INFINITI
retailer for this service.
Fusible links
If the electrical equipment does not operate
and fuses are in good condition, check the
fusible links. If any of these fusible links are
melted, replace with only Genuine NISSAN
parts.
LDI3174LDI3200
Do-it-yourself8-19

Seat belts:Check that all parts of the seat
belt system (for example, buckles, anchors,
adjusters 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 en-
sure they operate smoothly and all latches
lock securely in every position. Check that the
head restraints/headrests move up and
down smoothly and the locks (if so equipped)
hold securely in all latched positions.
Steering wheel: Check for changes in the
steering system, such as excessive free play,
hard steering or strange noises.
Warning lights and chimes: Make sure 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
The maintenance items listed here should be
checked periodically (for example, each time
you check the engine oil or refuel).
Battery (for maintenance free batteries)*:
This vehicle is equipped with a sealed main-
tenance free battery. It is recommended that
you visit an INFINITI retailer for this service.
NOTE:
Care should be taken to avoid situations
that can lead to potential battery discharge
and potential no-start conditions such as:
1. Installation or extended use of elec-
tronic accessories that consume battery
power when the engine is not running
(Phone chargers, GPS, DVD players,
etc.).
2. Vehicle is not driven regularly and/or
only driven short distances.
In these cases, the battery may need to be
charged to maintain battery health.
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 belt*:
Make sure the drive belt is
not 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, immediately have the
exhaust system inspected. It is recommended
that you visit an INFINITI retailer for this
service. For additional information, refer to
“Exhaust gas (carbon monoxide)” in the
“Starting and driving” section of this manual.
Fluid leaks: Check under the vehicle for fuel,
oil, water or other fluid leaks after the vehicle
has been parked for a while. Water dripping
from the air conditioner after use is normal. If
you should notice any leaks or if fuel fumes
are evident, check for the cause and have it
corrected immediately.
Radiator and hoses: Check the front of the
radiator and clean off any dirt, insects, leaves,
etc., that may have accumulated. Make sure
the hoses have no cracks, deformation, rot or
loose connections.
9-4Maintenance and schedules

E–15 fuel
E-15 fuel is a mixture of approximately 15%
fuel ethanol and 85% unleaded gasoline.
E-15 can only be used in vehicles designed to
run on E-15 fuel. U.S. government regula-
tions require fuel ethanol dispensing pumps
to be identified with small, square, orange
and black label with the common abbrevia-
tion or the appropriate percentage for that
region.
E–85 fuel
E-85 fuel is a mixture of approximately 85%
fuel ethanol and 15% unleaded gasoline.
E-85 can only be used in a Flexible Fuel Ve-
hicle (FFV). Do not use E-85 in your vehicle.
U.S. government regulations require fuel
ethanol dispensing pumps to be identified by
a small, square, orange and black label with
the common abbreviation or the appropriate
percentage for that region.
Fuel containing MMT
MMT, or methylcyclopentadienyl manganese
tricarbonyl, is an octane boosting additive.
INFINITI does not recommend the use of fuel
containing MMT. Such fuel may adversely
affect vehicle performance, including the
emissions control system. Note that while
some fuel pumps label MMT content, not alldo, so you may have to consult your gasoline
retailer for more details.
Aftermarket fuel additives
INFINITI does not recommend the use of any
aftermarket fuel additives (for example, fuel
injector cleaner, octane booster, intake valve
deposit removers, etc.) which are sold com-
mercially. Many of these additives intended
for gum, varnish or deposit removal may con-
tain active solvents or similar ingredients that
can be harmful to the fuel system and engine.
Octane rating tips
Using unleaded gasoline with an octane rat-
ing lower than recommended can cause per-
sistent, heavy “spark knock.” (“Spark knock”
is a metallic rapping noise.) If severe, this can
lead to engine damage. If you detect a per-
sistent heavy spark knock even when using
gasoline of the stated octane rating, or if you
hear steady spark knock while holding a
steady speed on level roads, it is recom-
mended that you have an INFINITI retailer
correct the condition. Failure to correct the
condition is misuse of the vehicle, for which
INFINITI is not responsible.
Incorrect ignition timing may result in spark
knock, after-run and/or overheating, which
may cause excessive fuel consumption or en-
gine damage. If any of the above symptoms
are encountered, have your vehicle checked.
It is recommended that you visit an INFINITI
retailer.
However, now and then you may notice light
spark knock for a short time while accelerat-
ing or driving up hills. This is not a cause for
concern, because you get the greatest fuel
benefit when there is light spark knock for a
short time under heavy engine load.
Technical and consumer information10-5

∙ Load the trailer so approximately 60% ofthe 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 tow-
ing before driving the vehicle.
∙ Determine the overall height of the ve- hicle 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
turning, stopping and backing up in an area
which is free from traffic. Steering stability
and braking performance will be somewhat
different than under normal driving condi-
tions.
∙ Always secure items in the trailer to pre- vent 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.
∙ 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 back-
ing up.
Always block the wheels on both vehicle and
trailer when parking. Parking on a slope is not
recommended; however, if you must do so:
CAUTION
If you move the shift selector to the P
(Park) position before blocking the wheels
and applying the parking brake, transmis-
sion damage could occur. 1. Apply and hold the brake pedal.
2. Have someone place blocks on the
downhill side of the vehicle and trailer
wheels.
3. After the wheel blocks are in place, slowly release the brake pedal until the
blocks absorb the vehicle load.
4. Apply the parking brake.
5. Shift the transmission into P (Park).
6. Turn off the engine.
To drive away: 1. Start the vehicle.
2. Apply and hold the brake pedal.
3. Shift the transmission into gear.
4. Release the parking brake.
5. Drive slowly until the vehicle and trailer are clear from the blocks.
6. Apply and hold the brake pedal.
7. Have someone retrieve and store the blocks.
10-26Technical and consumer information

11 Index
2nd row bench seat adjustment.......1-4
A
Active Engine Brake ............5-185
Active noise cancellation Active sound enhancement. .5-193, 5-194
Active Trace Control ............5-184
Aiming control, headlights .........2-44
Air bag (See supplemental restraint
system).....................1-43
Air bag system Front (See supplemental front impact air
bag system) ................1-51
Air bag warning labels ............1-63
Airbagwarninglight.........1-63,2-15
Air bag warning light,
supplemental ..............1-63,2-15
Air cleaner ...................8-15
Air cleaner housing filter ...........8-15
Air conditioner Air conditioner operation ........4-36
Air conditioner specification label . .10-12
Air conditioner system refrigerant and oil
recommendations ............10-7
Heater and air conditioner (automatic)
(if so equipped) ..............4-35
Heater and air conditioner controls . .4-36
Servicing air conditioner .........4-43
Alarm system
(See vehicle security system) ........2-33
Anchor point locations ............1-27 Antenna
....................4-44
Antifreeze ..................5-191
Anti-lock brake warning light ........2-10
Anti-lock Braking System (ABS) .....5-180
Armrests.....................1-5
Around View® Monitor ...........4-11
Audible reminders ...............2-19
Autolight switch ...............2-40
Automatic Automatic drive positioner . . .3-38, 3-40
Automatic power window switch . . .2-70
Automatic anti-glare inside mirror .....3-35
Automaticbrakehold ............5-26
Automatic door locks .............3-6
Automatic drive positioner .....3-38,3-40
B
Battery.................5- 191, 8-11
Charge warning light ...........2-11
Battery replacement .............8-21
INFINITI Intelligent Key .........8-21
Keyfob...................8-21
Before starting the engine ..........5-17
Belt (See drive belt) ..............8-13
Blind Spot Intervention® (BSI) .......5-54
Blind Spot Warning (BSW) .........5-46
Boosterseats.................1-40
Brake Anti-lock Braking System (ABS) . . .5-180
Brakefluid.................8-10
Brakelight(Seestoplight) .......8-23 Brake system
.............. 5-180
Brakewarninglight ...........2-10
Brake wear indicators ......2-19,8-18
Self-adjusting brakes ..........8-18
Brake Assist .................5-181
Brakefluid...................8-10
Brakes.....................8-18
Brake system ................5-180
Break-in schedule ..............5-171
Brightness control Instrument panel .............2-45
Bulb check/instrument panel ........2-10
Bulb replacement ...............8-23
C
Camera Aiding Sonar (parking sensor) . .4-24
Capacities and recommended
fuel/lubricants ................10-2
Cargoareastoragebin ...........2-61
Cargocover.................. 2-67
Cargo
(See vehicle

loading information) .....10-14
Car phone or CB radio ............4-44
Chassis control ...............5-184
Check tire pressure .............. 2-26
Child restraints .....1-20,1-20, 1-22, 1-24
LATCH (Lower Anchors and Tethers for
CHildren) System .............1-24
Precautions on child
restraints ......1-23, 1-29, 1-35, 1-40

Top tether strap anchor point
locations...................1-27
Child restraint with top tether strap ....1-27
Child safety rear door lock ...........3-6
Chimes, audible reminders ..........2-19
Cleaning exterior and interior ......7-2,7-4
Climate control seat switch .........2-47
C.M.V.S.S. certification label ........10-11
Cold weather driving .............5-191
Console box ..................2-58
Continuously Variable Transmission
(CVT) .......................5-19
Continuously Variable Transmission (CVT)
fluid.....................8-10
Driving with Continuously Variable
Transmission (CVT) ............5-19
Controls Heater and air conditioner controls . . .4-36
Coolant Capacities and recommended
fuel/lubricants...............10-2
Changing engine coolant ..........8-5
Checking engine coolant level .......8-5
Engine coolant temperature gauge ....2-6
Corrosion protection ..............7-7
Cruisecontrol..............5-75,5-76
Cupholders...................2-59
D
Diesel Particulate Filter (DPF) ........2-32
Dimensionsandweights...........10-9
Dimmer switch for instrument panel ....2-45
Distance Control Assist (DCA) system . .5-133
Door locks .................3-4,3-5 Drivebelt....................8-13
Drive positioner, Automatic
.....3-38,3-40
Driving Cold weather driving ...........5-191
Driving with Continuously Variable
Transmission (CVT) ............5-19
Precautions when starting and
driving .................5-4,5-11
Driving the vehicle ...............5-19
Dual panel moonroof .............2-71
Dual power moonroof .........2-71,2-71
Dynamic driver assistance switch
(for vehicles without ProPILOT Assist) . .2-49
E
E-call (SOS) Button ..............2-53
Economy - fuel ................5-173
Electronic parking brake ...........5-24
Emergency engine shutoff .......5-16,6-3
Emission control information label ....10-11
Emission control system warranty ....10-30
Engine Before starting the engine ........5-17
Block heater ................5-193
Capacities and recommended
fuel/lubricants...............10-2
Changing engine coolant ..........8-5
Changing engine oil .............8-6
Changing engine oil filter ..........8-6
Checking engine coolant level .......8-5
Checking engine oil level ..........8-6
Engine compartment check locations . .8-3
Engine coolant temperature gauge ....2-6
Engine cooling system ...........8-4 Engine oil
...................8-6
Engine oil and oil filter
recommendation ..............10-6
Engine oil pressure warning light ....2-11
Engine oil viscosity ............10-6
Engine serial number ..........10-11
Engine specifications ...........10-8
Starting the

engine ............5-17
Engine coolant temperature gauge ......2-6
Event Data recorders ............10-32
Exhaust gas (Carbon monoxide) .......5-4
Explanation of maintenance items ......9-2
Explanation of scheduled maintenance
items........................9-5
Extended storage switch ...........2-55
F
Flashers
(See hazard warning flasher switch) .....6-2
Flat tire ......................6-3
Floor mat positioning aid ............7-6
Fluid Brakefluid .................8-10
Capacities and recommended
fuel/lubricants............... 10-2
Continuously Variable Transmission (CVT)
fluid.....................8-10
Engine coolant ................8-4
Engine oil ...................8-6
Windshield-washerfluid.........8-11
F.M.V.S.S. certification label ........10-11
Fog light switch ................2-46
Forward Emergency Braking (FEB) with
Pedestrian Detection system ....2-12,5-150
11-2

K
Key.........................3-2
Key fob battery replacement .........8-21
Keyless entry With Intelligent Key system
(See Intelligent Key system) .......3-14
L
Label Tire and Loading Information label . .10-12
Labels Air conditioner specification label . . .10-12
C.M.V.S.S. certification label ......10-11
Emission control information label . .10-11
Engine serial number ..........10-11
F.M.V.S.S. certification label ......10-11
Tire and Loading Information label . .10-12
Vehicle identification number (VIN) . .10-10
Vehicle identification number (VIN)
plate....................10-10
Warning labels (for SRS) .........1-63
Lane Departure Prevention (LDP) .....5-40
Lane Departure Warning (LDW) ......5-35
LATCH (Lower Anchors and Tethers for
CHildren)System ...............1-24
LED Daytime Running Lights (DRL)
system......................2-44
License plate Installing the license plate ........10-12
Liftgate.....................3-23
Liftgaterelease ................3-28
Light Airbagwarninglight........1-63,2-15 Brakelight(Seestoplight)........8-23
Bulb check/instrument panel
......2-10
Bulb replacement .............8-23
Charge warning light ...........2-11
ExteriorandInteriorlights........8-23
Foglights..................8-23
Fog light switch ..............2-46
Headlight and turn signal switch ....2-40
Headlights .................8-23
Interiorlight.................2-74
Lightbulbs.................8-23
Low tire pressure warning light .....2-12
Low windshield-washer fluid warning
light .....................2-26
Passenger air bag and status light . . .1-54
Personal lights ...............2-75
Security indicator light ..........2-18
Trunklight..................2-75
Warning/indicator lights and audible
reminders ...........2-9,2-10,2-16
Lights......................8-23 Maplights..................2-75
Lock Child safety rear door lock .........3-6
Door locks ...............3-4,3-5
Gloveboxlock...............2-58
Liftgaterelease ..............3-28
Power door locks ...........3-5,3-6
Loose fuel cap warning ............2-26
Lowfuelwarninglight ........2-14,2-26
Low tire pressure warning light .......2-12
Low windshield-washer fluid warning
light .......................2-26
Luggage hook .................2-61
Luggage rack (see roof rack) .....2-62,2-63Luggage
(See vehicle loading information)
.....10-14
M
Maintenance Generalmaintenance............9-2
Inside the vehicle ..............9-3
Maintenance precautions .........8-2
Outside the vehicle .............9-2
Seat belt maintenance ..........1-19
Under the hood and vehicle ........9-4
Maintenance log ................9-13
Maintenance requirements ..........9-2
Maintenance schedules ..........9-7, 9-7
Maintenance under severe operation
conditions....................9-12
Malfunctionindicatorlight..........2-17
Maplights.................... 2-75
Memory Seat ..............3-38,3-40
Meters and gauges ...............2-4
Instrument brightness control ......2-45
Mirror Automatic anti-glare inside mirror . . .3-35
Outside mirrors ..............3-36
Rearview .................. 3-35
Vanity mirror................ 3-34
Mirrors .....................

3-35
Moonroof ................. 2-71, 7-5
Moving Object Detection (MOD) ......4-29
O
Octane rating (See fuel octane rating) . . .10-5
11-4

Odometer.....................2-5
Oil Capacities and recommended
fuel/lubricants...............10-2
Changing engine oil .............8-6
Changing engine oil filter ..........8-6
Checking engine oil level ..........8-6
Engine oil ...................8-6
Engine oil and oil filter
recommendation ..............10-6
Engine oil viscosity ............10-6
Outside mirrors ................3-36
Overhead sunglasses holder .........2-58
Overheat If your vehicle overheats ..........6-7
Owner's manual order form ........10-33
Owner's manual/service manual order
information..................10-33
P
Parking Parking/parking on hills .........5-177
Parkingbrake..............2-11,2-16
Personal lights .................2-75
Power Power door locks ...........3-5,3-6
Power outlet ................2-54
Power rear windows ...........2-70
Power steering system .....5-177, 5-178
Power windows ..............2-68
Rear power windows ...........2-70
Power outlet ..................2-54
Power steering............5- 177, 5-178Precautions
Maintenance precautions .........8-2
On-pavement and off-road driving
precautions ..................5-9
Precautions on booster
seats..........1-23,1-29,1-35,1-40
Precautions on child
restraints .......1-23,1-29,1-35,1-40
Precautionsonseatbeltusage .....1-11
Precautions on supplemental restraint
system ....................1-43
Precautions when starting and
driving .................5-4,5-11
Predictive Forward Collision Warning
(PFCW)....................5-160
ProPILOT Assist ...............5-101
Push starting ...................6-7
R
Radio Car phone or CB radio ..........4-44
Rainsensor...................2-37
Readiness for inspection maintenance (I/M)
test.......................10-31
Rear Automatic Braking (RAB) . . .2-15, 5-145
Rear Cross Traffic Alert (RCTA) .......5-67
Rear power sunshade .............2-71
Rear power windows .............2-70
Rearview mirror ................3-35
RearView Monitor ...............4-3
Rear window defroster, outside mirror
defroster,andwiperdeicerswitch.....2-39
Rear window wiper and washer
switches .....................2-38 Recommended Fluids
.............10-2
Recorders EventData................ 10-32
Refrigerant recommendation ........10-7
Registering a vehicle in another
country .................... 10-10
Remote Engine Start .........3-20, 5-18
Reporting safety defects (US only) . . . .10-30
Roadside assistance program .........6-2
Roof rack ................2-62,2-63
S
Safety Child safety

rear door lock .........3-6
Child seat belts . . .1-23, 1-29, 1-35, 1-40
Reporting safety defects (US only) . .10-30
Seat adjustment Front power seat adjustment .......1-3
Second row bench seats ..........1-4
Seatback pockets ............... 2-56
Seat belt Childsafety.................1-20
Infantsandsmallchildren ........1-20
Injured Person ...............1-15
Largerchildren...............1-21
Precautionsonseatbeltusage .....1-11
Pregnant women .............1-14
Seat belt extenders ............1-19
Seat belt maintenance ..........1-19
Seat belts ...............1-11,7-7
Three-point type with retractor .....1-15
Seat belt extenders ..............1-19
Seat belt warning light .........1-14,2-15
11-5