INFINITI QX 2011 Owners Manual

REPLACING SPARK PLUGS
If replacement is required, see an INFINITI re-
tailer 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 maintenance schedule in
“INFINITI Service and Maintenance Guide”, but
do not reuse them by cleaning or regapping.
Always replace spark plugs with recommended
or equivalent ones.To remove the filter, release the lock pins
1
and pull the unit upward2.
The filter element should not be cleaned and
reused. Replace it according to the mainte-
nance intervals. See “INFINITI Service and Main-
tenance Guide” for maintenance intervals.
When replacing the filter, wipe the inside of the
air cleaner housing and the cover with a damp
cloth.
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 careful when work-
ing on the engine with the air cleaner
removed.
● Never pour fuel into the throttle body or at-
tempt to start the engine with the air cleaner
removed. Doing so could result in serious
injury.
SDI2020SDI2515
AIR CLEANER
8-18Maintenance and do-it-yourself

CLEANING
If your windshield is not clear after using the
windshield washer or if a wiper blade chatters
when running, wax or other material may be on
the blade or windshield.
Clean the outside of the windshield with a
washer solution or a mild detergent. Your wind-
shield is clean if beads do not form when
rinsing with clear water.
Clean each blade by wiping it with a cloth
soaked in a washer solution or a mild deter-
gent. Then rinse the blade with clear water. If
your windshield is still not clear after cleaning
the blades and using the wiper, replace the
blades.
Worn windshield wiper blades can damage the
windshield and impair driver vision.
REPLACING
Replace the wiper blades if they are worn.
1. Pull the wiper arm.
2. Push the release tab
A, and then move
the wiper blade down the wiper arm
1
while pushing the release tab to remove.
3. Insert the new wiper blade onto the wiper arm until a click sounds.
4. Rotate the wiper blade so the dimple is in the groove.
CAUTION
●After wiper blade replacement, return the
wiper arm to its original position;
otherwise it may be damaged when the hood
is opened.
● Make sure the wiper blades contact the
glass; otherwise the arm may be damaged
from wind pressure.
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WINDSHIELD WIPER BLADES
Maintenance and do-it-yourself8-19

Be careful not to clog the washer nozzleA.
This may cause improper windshield washer
operation. If the nozzle is clogged, remove any
objects with a needle or small pin
B.Be
careful not to damage the nozzle. Contact an INFINITI retailer if checking or re-
placement is required.
If the brakes do not operate properly, have the
brakes checked by an INFINITI retailer.
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
See an INFINITI retailer for a brake system
check if the brake pedal height does not return
to normal.
BRAKE PAD WEAR WARNING
The disc brake pads have audible wear warn-
ings. When a brake pad requires replacement, 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 warn-
ing sound is heard.
SDI2516
REAR WINDOW WIPER BLADES
BRAKES
8-20Maintenance and do-it-yourself

Under some driving or climate conditions, occa-
sional 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 sys-
tem.
Proper brake inspection intervals should be fol-
lowed.For additional information, see the main-
tenance log section of your “INFINITI Service
and Maintenance Guide” for maintenance inter-
vals.
BRAKE BOOSTER
Check the brake booster function as follows:
1. With the engine off, depress and release the foot brake pedal more than 20 times.
When the foot brake pedal movement
(distance of travel) remains the same from
one pedal application to the next, con-
tinue on to the next step.
2. While depressing the foot brake pedal, start the engine.
3. With the foot brake pedal depressed, stop the engine. Keep the pedal depressed for
about 30 seconds. 4. Run the engine for 1 minute without de-
pressing the foot brake pedal, then turn it
off. Depress the foot brake pedal several
times. The pedal travel distance will de-
crease gradually with each depression as
the hydraulic pressure decreases.
If the brakes do not operate properly, have the
brakes checked by an INFINITI retailer.
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SDI2532
FUSES
Maintenance and do-it-yourself8-21

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 to the OFF or LOCK position and the head-
light switch is turned to OFF.
2. Open the engine hood and remove the cover on the battery.
3. Remove the fuse/fusible link holder cover
1,2or3.
4. Remove the fuse with the fuse puller. 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 elec- trical 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.
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8-22Maintenance and do-it-yourself

PASSENGER 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 to the OFF or LOCK position and the head-
light switch is turned to OFF. 2. Open the fuse box lid.
3. Remove the fuse with the fuse puller
A.
4. If the fuse is open, replace it with a new fuse.
5. If a new fuse also opens, have the electri- cal system checked and repaired by an
INFINITI retailer. Spare fuses are stored in
the fuse box.
Extended storage switch (if so
equipped)
To reduce battery drain, the extended storage
switch comes from the factory switched off.
Prior to delivery of your vehicle, the switch is
pushed in (switched on) and should always
remain on.
If any electrical equipment does not operate,
remove the extended storage switch and check
for an open fuse.
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Maintenance and do-it-yourself8-23

NOTE:
If the extended storage switch malfunctions or if
the fuse is open, it is not necessary to replace
the switch. In this case, remove the extended
storage switch and replace it with a new fuse of
the same rating.
How to remove the extended storage switch:
1. To remove the extended storage switch,be sure the ignition switch is in the OFF or
LOCK position.
2. Be sure the headlight switch is in the OFF position.
3. Remove the fuse box cover.
4. Pinch the locking tabs
1found on each
side of the storage switch.
5. Pull the storage switch straight out from the fuse box
2.
Replace the battery as follows:
1. Release the lock knob at the back of the
Intelligent Key and remove the mechanical
key. 2. Insert a small screwdriver into the slit of
the corner and twist it to separate the
upper part from the lower part. Use a
cloth to protect the casing.
3. Replace the battery with a new one.
Recommended battery: CR2025 or equiva-
lent.
● Do not touch the internal circuit and
electric terminals as it could cause a
malfunction.
● Hold the battery by the edges. Holding
the battery across the contact points will
seriously deplete the storage capacity.
● Make sure that the + side faces the
bottom of the case.
SDI2451
INTELLIGENT KEY BATTERY REPLACEMENT
8-24Maintenance and do-it-yourself

4. Align the tips of the upper and lower parts
1, and then push them together until it
is securely closed
2.
5. Push the buttons two or three times to check its operation.
See an INFINITI retailer if you need any assis-
tance for replacement. FCC Notice:
This device complies with Part 15 of FCC Rules
and RSS-Gen of IC Rules. Operation is subject to
the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, in-
cluding interference that may cause undesired
operation of this device.
SDI2452
Maintenance and do-it-yourself8-25

1. Map light
2. Park light
3. Front side marker light
4. Front turn signal light
5. Fog light6. Headlight (high-beam, low-beam)
7. Puddle light
8. Step light
9. Side turn signal light
10. Cargo light11. High-mounted stop light
12. Front armrest light
13. Rear armrest light
14. Rear personal light
15. Rear combination light
(tail/stop/turn signal/side marker light)
16. Tail light
17. Back-up light
18. License plate light
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LIGHTS
8-26Maintenance and do-it-yourself

HEADLIGHTS
Replacing
Fog may temporarily form inside the lens of the
exterior lights in the rain or in a car wash. A
temperature difference between the inside and
the outside of the lens causes the fog. This is
not a malfunction. If large drops of water collect
inside the lens, contact an INFINITI retailer.
Xenon headlight bulb :
If replacement is required, see an INFINITI re-
tailer.
WARNING
HIGH VOLTAGE
When xenon headlights are on, they produce a
high voltage. To prevent an electric shock,
never attempt to modify or disassemble. Al-
ways have your xenon headlights replaced at
an INFINITI retailer. For additional information,
see “HEADLIGHT AND TURN SIGNAL SWITCH” in
the “2. Instruments and controls” section.
EXTERIOR AND INTERIOR LIGHTS
ItemWattage (W)Bulb No.
Headlight* High/Low beams (Xenon) 35D2S
Front turn signal light* 21WY21W
Fog light* 35H8
Park light* 5W5W
Front side marker light* 5W5W
Rear combination light* tail 5W5W
back-up 16W16W
stop/tail LED—
side marker LED—
turn signal 21WY21W
License plate light 5W5W
Puddle light* LED—
Front and rear armrest light* LED—
Map light 8—
Rear personal light 8—
Cargo light 8—
Vanity mirror light 2—
Step light* 8—
High-mounted stop light* LED—
*: See an INFINITI retailer for replacement.
NOTE: Always check with the Parts Department at an INFINITI retailer for the latest information about
parts.
Maintenance and do-it-yourself8-27