service INFINITI Q50 2019 Repair Manual

8-8Do-it-yourself
The engine cooling system is filled at the
factory with a pre-diluted mixture of 50%
BASF Glysantin
®G48®and 50% water to
provide year-round anti-freeze and coolant
protection. The anti-freeze solution contains
rust and corrosion inhibitors. Additional
engine cooling system additives are not
necessary.
WARNING
Never remove the radiator cap when the
engine is hot. Wait until the engine and
radiator cool down. Serious burns could
be caused by high pressure fluid escaping
from the radiator. See precautions in “If
your vehicle overheats” (P.6-16) of this
manual.
CAUTION
. Never use any cooling system addi-
tives such as radiator sealer. Addi-
tives may clog the cooling system and
cause damage to the engine, trans-
mission and/or cooling system.
. When adding or replacing coolant, be
sure to use only BASF Glysantin
®
G48®or equivalent. BASF Glysantin®
G48®is pre-diluted to provide anti-
freeze protection to −34°F (−37°C). If
additional freeze protection is
needed due to weather where you
operate your vehicle, add BASF Gly-
santin
®G48®concentrate following
the directions on the container. If an
equivalent coolant other than BASF
Glysantin
®G48®is used, follow the
coolant manufacture’s instructions to
maintain minimum antifreeze protec-
tion to −34°F (−37°C). The use of
other types of coolant solutions
other than BASF Glysantin
®G48®
or equivalent may damage the engine
cooling system.
. The life expectancy of the factory-fill
coolant is 120,000 miles (192,000
km) or 10 years. Mixing any other
type of coolant other than BASF
Glysantin
®G48®, or the use of non-
distilled water will reduce the life
expectancy of the factory-fill cool-
ant. Refer to the “9. Maintenance
and schedules” section of this manual
for more details.
JVM0303X
CHECKING ENGINE COOLANT
LEVEL
Check the coolant level in the reservoir when
the engine is running and after it reaches
normal operating temperature. If the coolant
level is below MIN level
, add coolant up to
the MAX level. Tighten the cap securely
after adding engine coolant.
If the cooling system frequently requires
coolant, have it checked. It is recommended
you visit an INFINITI retailer for this
service.
ENGINE COOLING SYSTEM (for
2.0L turbo gasoline engine models)

CHANGING ENGINE COOLANT
It is recommended that major cooling system
repairs be performed by an INFINITI retailer.
The service procedures can be found in the
appropriate INFINITI Service Manual.
Improper servicing can result in reduced
heater performance and engine overheat-
ing.
WARNING
.To avoid the danger of being scalded,
never change the coolant when the
engine is hot.
. Never remove the radiator cap when
the engine is hot. Serious burns could
be caused by high pressure fluid
escaping from the radiator.
. Avoid direct skin contact with used
coolant. If skin contact is made, wash
thoroughly with soap or hand cleaner
as soon as possible.
. Keep coolant out of reach of children
and pets.
Engine coolant must be disposed of prop-
erly. Check your local regulations. The intercooler cooling system is filled at the
factory with a pre-diluted mixture of 50%
Genuine NISSAN Long Life Antifreeze/
Coolant (blue) and 50% water to provide
year-round anti-freeze and coolant protec-
tion. The antifreeze solution contains rust
and corrosion inhibitors. Additional inter-
cooler cooling system additives are not
necessary.
WARNING
.
Never remove the coolant reservoir
cap when the engine is hot. Wait until
the engine cools down. Serious burns
could be caused by high pressure fluid
escaping from the coolant reservoir.
. The intercooler reservoir is equipped
with a pressure type cap. To prevent
engine and intercooler damage, use
only a genuine NISSAN intercooler
reservoir cap.
CAUTION
.Never use any additives in the cool-
ant such as radiator sealer in the
cooling system. This may cause da-
mage to the intercooler. .
When adding or replacing coolant, be
sure to use only Genuine NISSAN
Long Life Antifreeze/Coolant (blue)
or equivalent. Genuine NISSAN Long
Life Antifreeze/Coolant (blue) is pre-
diluted to provide antifreeze protec-
tion to −34°F(−37°C). If additional
freeze protection is needed due to
weather where you operate your
vehicle, add Genuine NISSAN Long
Life Antifreeze/Coolant (blue) con-
centrate following the directions on
the container. If an equivalent cool-
ant other than Genuine NISSAN Long
Life Antifreeze/Coolant (blue) is
used, follow the coolant manufac-
ture’s instructions to maintain mini-
mum antifreeze protection to −34°F
(−37°C). The use of other types of
coolant solutions other than Genuine
NISSAN Long Life Antifreeze/Cool-
ant (blue) or equivalent may damage
the Intercooler cooling system.
Do-it-yourself8-9
INTERCOOLER COOLING SYSTEM
(for VR30DDTT engine models)

8-10Do-it-yourself
JVM0653X
CHECKING INTERCOOLER
COOLANT LEVEL
Check the coolant level in the reservoir when
the engine is cold. If the coolant level is
below the MIN level
, add coolant to the
MAX level.
If the intercooler cooling system frequently
requires coolant, have it checked. It is
recommended you visit an INFINITI retailer
for this service.
CHANGING INTERCOOLER
COOLANT
Intercooler coolant is maintenance-free.
If replacement is required, it is recommended
you visit an INFINITI retailer for this service.
Improper servicing can result in intercooler
overheating.
WARNING
. To avoid the danger of being scalded,
never change the coolant when the
engine is hot.
. Never remove the cap when the
engine is hot. Serious burns could be
caused by high pressure fluid escap-
ing from the intercooler cooling re-
servoir.
. Avoid direct skin contact with used
coolant. If skin contact is made, wash
thoroughly with soap or hand cleaner
as soon as possible.
. Keep coolant out of the reach of
children and pets.
Intercooler coolant must be disposed of
properly. Check your local regulations.
JVM0654X
VR30DDTT engine
ENGINE OIL

For further brake fluid information, see
“Capacities and recommended fluids/lubri-
cants” (P.10-2) of this manual.
WARNING
.Use only new fluid from a sealed
container. Old, inferior or contami-
nated 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 con-
tainers out of the reach of children.
CAUTION
Do not spill the fluid on painted surfaces.
This will damage the paint. If fluid is
spilled, wash the surface with water.
JVM0731X
Check the fluid level in the reservoir. If the
fluid is below the MIN lineor the brake
warning light comes on, add Genuine
NISSAN Super Heavy Duty Brake Fluid or
equivalent DOT 3fluid up to the MAX line
.
If fluid must be added frequently, the system
should be checked. It is recommended you
visit an INFINITI retailer for this service.
JVM0253X
WARNING
Antifreeze is poisonous and should be
stored carefully in marked containers
out of the reach of children.
Fill the window washer fluid reservoir per-
iodically. Add window washer fluid when the
low window washer fluid warning appears in
the vehicle information display.
To fill the window washer fluid reservoir, lift
the cap off the reservoir and pour the
window washer fluid into the reservoir
opening.
Do-it-yourself8-15
BRAKE FLUID WINDOW WASHER FLUID

JUMP STARTING
If jump starting is necessary, see “Jump
starting” (P.6-9). If the engine does not start
by jump starting, the battery may have to be
replaced. It is recommended you visit an
INFINITI retailer for this service.CAUTION
.Do not ground accessories directly to
the battery terminal. Doing so will
bypass the variable voltage control
system and the vehicle battery may
not charge completely.
. Use electrical accessories with the
engine running to avoid discharging
the vehicle battery.
The variable voltage control system mea-
sures the amount of electrical discharge
from the battery and controls voltage gen-
erated by the generator.
JVM0655X
VR30DDTT engine
1. Water pump
2. Alternator
3. Drive belt auto-tensioner
4. Crankshaft pulley
5. Air conditioner compressor
Do-it-yourself8-19
VARIABLE VOLTAGE CONTROL SYSTEMDRIVE BELTS

8-20Do-it-yourself
JVM0433X
2.0L turbo gasoline engine
1. Water pump
2. Crankshaft pulley
3. Drive belt auto-tensioner
4. Air conditioner compressor
5. Alternator
WARNING
Be sure the ignition switch is in the OFF
or LOCK position before servicing drive
belts. The engine could rotate unexpect-
edly. 1. Visually inspect each belt for signs of
unusual wear, cuts, fraying or looseness.
If the belt is in poor condition or loose,
have it replaced or adjusted. It is recom-
mended you visit an INFINITI retailer for
this service.
2. Have the belts checked regularly for condition and tension in accordance with
the maintenance schedule shown in the
“9. Maintenance and schedules” section.
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.
SPARK PLUGS

SDI2020
REPLACING SPARK PLUGS
If replacement is required, it is recommended
you visit an INFINITI retailer for this service.
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 maintenance
schedule shown in the “9. Maintenance and
schedules” section, but do not reuse them by
cleaning or regapping.
Always replace spark plugs with recom-
mended or equivalent ones.
WARNING
.Operating the engine with the air
cleaner removed can cause you or
others to be burned. The air cleaner
not only cleans the air, it stops flame
if the engine backfires. If it isn’t
there, and the engine backfires, you
could be burned. Do not drive with
the air cleaner removed, and be care-
ful when working on the engine with
the air cleaner removed.
. Never pour fuel into the throttle body
or attempt to start the engine with
the air cleaner removed. Doing so
could result in serious injury.
The filter element should not be cleaned and
reused. Replace it according to the main-
tenance schedule shown in the “9. Main-
tenance and schedules” section. When
replacing the filter, wipe the inside of the
air cleaner housing and the cover with a
damp cloth.
When maintenance is required, it is recom-
mended you contact an INFINITI retailer for
servicing.
Do-it-yourself8-21
AIR CLEANER

If the brakes do not operate properly, have
the brakes checked. It is recommended you
visit an INFINITI retailer for this service.
SELF-ADJUSTING BRAKES
Your vehicle is equipped with self-adjusting
brakes.
The 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
normal. It is recommended you visit an
INFINITI retailer for this service.
BRAKE PAD WEAR WARNING
The disc brake pads have audible wear
warnings. When a brake pad requires repla-
cement, 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 schedule shown in the “9.
Maintenance and schedules” section.
JVM0255X
VR30DDTT engine model
JVM0734X
VR30DDTT engine model
Do-it-yourself8-23
BRAKES FUSES

SDI1754
5. If the fuse is open, replace it with a
new fuse. Spare fuses are stored in the
passenger compartment fuse box.
6. If a new fuse also opens, have the electrical system checked and repaired.
It is recommended you visit an INFINITI
retailer for this service.
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.
JVM0256X
PASSENGER COMPARTMENT
WARNING
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 electronic con-
trol units or cause a fire.
If any electrical equipment does not operate,
check for an open fuse.
1. Be sure the ignition switch is placed in the OFF or LOCK position and the
headlight switch is turned to OFF. 2. Open the fuse box lid.
3. Remove the fuse with the fuse puller
.
4. If the fuse is open, replace it with a new fuse.
5. If a new fuse also opens, have the electrical system checked and repaired.
It is recommended you visit an INFINITI
retailer for this service. Spare fuses are
stored in the fuse box.
Do-it-yourself8-25

JVM0317X
To replace the battery:
1. Release the lock knob at the back of theIntelligent Key and remove the mechan-
ical key.
2. Insert a flat-blade screwdriver wrapped with a cloth into the slit of the corner and
twist it to separate the upper part from the lower part.
3. Replace the battery with a new one. Recommended battery:
CR2032 or equivalent
.Do not touch the internal circuit andelectric terminals as it could cause a
malfunction.
.Hold the battery by the edges. Hold-
ing the battery across the contact
points will seriously deplete the sto-
rage capacity.
.Make sure that the + side faces thebottom of the case.
SDI2452
4. Align the tips of the upper and lower
parts, and then push them togetheruntil it is securely closed.
5. Operate the buttons to check its opera- tion.
If you need any assistance for replacement,
it is recommended you visit an INFINITI
retailer for this service.
FCC Notice:
For USA:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions: (1) This device
may not cause harmful interference, and (2)
this device must accept any interference
Do-it-yourself8-27