brake sensor INFINITI QX50 2023 User Guide

–The vehicle is driven on a slippery
road.
– The vehicle is turned sharply by turn-
ing the steering wheel fully.
– Snow chains are used.
– Wheels or tires other than INFINITI
recommended are used.
– The brakes are cold at low ambient
temperatures or immediately after
driving has started.
– The braking force becomes poor due
to wet brakes after driving through a
puddle or washing the vehicle.
• Turn the RAB system off in the following
conditions to prevent the occurrence of
an unexpected accident resulting from
sudden system operation:
– The vehicle is towed.
–
The vehicle is carried on a flatbed truck.
– The vehicle is on the chassis dyna-
mometer.
– The vehicle drives on an uneven road
surface.
– Suspension parts other than those
designated as Genuine INFINITI
parts are used. (If the vehicle height
or the vehicle body inclination is
changed, the system may not detect
an obstacle correctly.) –
The vehicle is towing an object (if so
equipped).
– If a vehicle is using an accessory like a
bike rack, or cargo carrier that blocks
the sensors.
• Excessive noise (e.g., audio system vol-
ume, an open vehicle window) will inter-
fere with the chime sound, and it may not
be heard.
SYSTEM MALFUNCTION
If the RAB system malfunctions, it will be
turned off automatically, the RAB system
warning light will illuminate, and the “System
fault” warning message will appear in the
vehicle information display.
Action to take
If the warning light illuminates, park the ve-
hicle in a safe location, turn the engine off,
and restart the engine. If the warning light
continues to illuminate, have the RAB system
checked. It is recommended that you visit an
INFINITI retailer for this service.
NOTE:
If the RAB system cannot be operated tempo-
rarily, the RAB system warning light blinks.
SYSTEM MAINTENANCE
Observe the following items to ensure proper
operation of the system:
• Always keep the parking sensors
O1clean.
• If the parking sensors are dirty, wipe them off with a soft cloth while being careful to
not damage them.
• Do not subject the area around the parking sensors
O1to strong impact. Also, do not
remove or disassemble the parking sensors.
LSD3559
5-108Starting and driving

•Tire type and condition may also affect
braking effectiveness.
–
When replacing tires, install the speci-fied size of tires on all four wheels.
– When installing a spare tire, make
sure that it is the proper size and type
as specified on the Tire and Loading
Information label. For additional
information, see “Tire and Loading
Information label” (P. 8-29).
–
For additional information, see “Wheels and tires” (P. 8-27).
The ABS controls the brakes so the wheels do
not lock during hard braking or when braking
on slippery surfaces. The system detects the
rotation speed at each wheel and varies the
brake fluid pressure to prevent each wheel
from locking and sliding. By preventing each
wheel from locking, the system helps the
driver maintain steering control and helps to
minimize swerving and spinning on slippery
surfaces.
Using the system
Depress the brake pedal and hold it down.
Depress the brake pedal with firm steady
pressure, but do not pump the brakes. The Anti-lock Braking System will operate to pre-
vent the wheels from locking up. Steer the
vehicle to avoid obstacles.
WARNING
Do not pump the brake pedal. Doing so may
result in increased stopping distances.
Self-test feature
The Anti-lock Braking System (ABS) includes
electronic sensors, electric pumps, hydraulic
solenoids and a computer. The computer has
a built-in diagnostic feature that tests the
system each time you start the engine and
move the vehicle at a low speed in forward or
reverse. When the self-test occurs, you may
hear a “clunk” noise and/or feel a pulsation in
the brake pedal. This is normal and does not
indicate a malfunction. If the computer
senses a malfunction, it switches the ABS off
and illuminates the ABS warning light on the
instrument panel. The brake system then
operates normally but without anti-lock
assistance.
If the ABS warning light illuminates during
the self-test or while driving, have the vehicle
checked. It is recommended that you visit an
INFINITI retailer for this service.
Normal operation
The Anti-lock Braking System (ABS) operates
at speeds above3-6mph(5-10km/h). The
speed varies according to road conditions.
When the ABS senses that one or more
wheels are close to locking up, the actuator
rapidly applies and releases hydraulic pres-
sure. This action is similar to pumping the
brakes very quickly. You may feel a pulsation
in the brake pedal and hear a noise from
under the hood or feel a vibration from the
actuator when it is operating. This is normal
and indicates that the ABS is operating prop-
erly. However, the pulsation may indicate
that road conditions are hazardous and extra
care is required while driving.
BRAKE ASSIST
When the force applied to the brake pedal
exceeds a certain level, the Brake Assist is
activated generating greater braking force
than a conventional brake booster even with
light pedal force.
WARNING
The Brake Assist is only an aid to assist
braking operation and is not a collision
warning or avoidance device. It is the driv-
er’s responsibility to stay alert, drive safely
and be in control of the vehicle at all times.
Starting and driving5-141

The VDC system uses various sensors to
monitor driver inputs and vehicle motion. Un-
der certain driving conditions, the VDC sys-
tem helps to perform the following functions:
• Controls brake pressure to reduce wheelslip on one slipping drive wheel so power is
transferred to a non-slipping drive wheel
on the same axle.
• Controls brake pressure and engine output to reduce drive wheel slip based on vehicle
speed (traction control function).
• Controls brake pressure at individual wheels and engine output to help the driver
maintain control of the vehicle in the fol-
lowing conditions:
Understeer (vehicle tends to not follow the
steered path despite increased steering input)
Oversteer (vehicle tends to spin due to certain
road or driving conditions)
The VDC system can help the driver to main-
tain control of the vehicle, but it cannot pre-
vent loss of vehicle control in all driving
situations. When the VDC system operates, theindicator light in the instrument panel flashes
to note the following:
• The road may be slippery or the system may
determine some action is required to help
keep the vehicle on the steered path.
• You may feel a pulsation in the brake pedal and hear a noise or vibration from under the
hood. This is normal and indicates that the
VDC system is working properly.
• Adjust your speed and driving to the road conditions.
For additional information, see “Slip indicator
light” (P. 2-17) and ”Vehicle Dynamic Control
(VDC) OFF indicator light” (P. 2-17).
If a malfunction occurs in the system, the
andindicator lights come on in the
instrument panel. The VDC system automati-
cally turns off when these indicator lights are
on.
The lower display is used to turn off the VDC
system. When the VDC system is turned off,
the
indicator light, the RAB system
warning light, and the FEB with Pedestrian
Detection system warning light illuminate to
indicate the VDC, FEB with Pedestrian De-
tection, and RAB systems are off. When the lower display is used to turn off the
system, the VDC system still operates to pre-
vent one drive wheel from slipping by trans-
ferring power to a non-slipping drive wheel.
The
indicator light flashes if this occurs.
All other VDC functions are off and the
indicator light will not flash.
The VDC system is automatically reset to on
when the ignition switch is placed in the OFF
position then back to the ON position.
The computer has a built-in diagnostic feature
that tests the system each time you start the
engine and move the vehicle forward or in re-
verse at a slow speed. When the self-test oc-
curs, you may hear a clunk noise and/or feel a
pulsation in the brake pedal. This is normal and
is not an indication of a malfunction.
WARNING
• The VDC system is designed to help the
driver maintain controllability but does
not prevent accidents due to abrupt
steering operation at high speeds or by
careless or dangerous driving tech-
niques. Reduce vehicle speed and be es-
pecially careful when driving and corner-
ing on slippery surfaces and always drive
carefully.
VEHICLE DYNAMIC CONTROL (VDC)
SYSTEM
5-142Starting and driving

When the Active Trace Control is operated
and the “Chassis Control” mode is selected in
the vehicle information display, the Active
Trace Control graphics are shown in the ve-
hicle information display.
If the chassis control warning message ap-
pears in the vehicle information display, it
may indicate that the Active Trace Control is
not functioning properly. Have the system
checked as soon as possible. It is recom-
mended that you visit an INFINITI retailer for
this service.WARNING
The Active Trace Control may not be effec-
tive depending on the driving condition. Al-
ways drive carefully and attentively.
When the Active Trace Control is operating,
you may feel a pulsation in the brake pedal
and hear a noise. This is normal and indicates
that the Active Trace Control is operating
properly.
You may also feel deceleration when the Ac-
tive Trace Control is operating. However, this
is not a malfunction. Even if the Active Trace Control is set to OFF,
some functions will remain on to assist the
driver (for example: avoidance scenes).
ACTIVE ENGINE BRAKE
The Active Engine Brake function adds subtle
deceleration by controlling Continuously
Variable Transmission (CVT) gear ratio, de-
pending on the cornering condition calcu-
lated from the driver's steering input and
plural sensors. This benefit is for easier trace-
ability and less workload of adjusting speed
with braking at corners.
The Active Engine Brake also adds subtle
deceleration with gear ratio control accord-
ing to the driver's brake pedal operation.
When the lower display is used to turn off the
Vehicle Dynamic Control system, the Active
Engine Brake system is also turned off.
When the PERSONAL mode is selected, the
Active Engine Brake can be set to ON (en-
abled) or OFF (disabled).
When the Active Engine Brake is operated at
corners and the “Chassis Control” mode is
selected in the vehicle information display,
the Active Engine Brake graphics are shown
in the vehicle information display.
LSD4792
Starting and driving5-145

SONAR LIMITATIONS
WARNING
Listed below are the system limitations for
the sonar system. Failure to operate the
vehicle in accordance with these system
limitations could result in serious injury or
death.
• The system is deactivated at speeds
above 6 mph (10 km/h). It is reactivated
at lower speeds.
• Inclement weather or ultrasonic sources
such as an automatic car wash, a truck’s
compressed-air brakes or a pneumatic
drill may affect the function of the sys-
tem; this may include reduced perfor-
mance or a false activation.
• The system is not designed to prevent
contact with small or moving objects. Al-
ways move slowly. The system will not
detect small objects below the bumper or
on the ground.
• The system may not detect the following
objects: fluffy objects such as snow,
cloth, cotton, glass-wool, etc.; thin ob-
jects such as rope, wire and chain, etc.; or
wedge-shaped objects. •
The system may not detect objects at
speeds above 3 mph (5 km/h) and may
not detect certain angular or moving
objects.
• Do not attach stickers (including trans-
parent material), install accessories, or
apply anything blocking the sensors.
These conditions may reduce the ability
of the system.
SYSTEM TEMPORARILY
UNAVAILABLE
When sonar blockage is detected, the system
will be deactivated automatically.
The system is not available until the condi-
tions no longer exist.
The sonar sensors may be blocked by tempo-
rary ambient conditions such as splashing
water, mist or fog. The blocked condition
may also be caused by objects such as ice,
frost or dirt obstructing the sonar sensors.
Action to take:
When the above conditions no longer exist,
the system will resume automatically.
SYSTEM MAINTENANCE
The sonar sensors are located on the front
and rear bumpers. Always keep the area near
the sonar sensors clean.
The sonar sensors may be blocked by tempo-
rary ambient conditions such as splashing
water, mist or fog.
The blocked condition may also be caused by
objects such as ice, frost or dirt obstructing
the sonar sensors.
LSD2993
5-152Starting and driving

Replacing wheels and tires
When replacing a tire, use the same size,
tread design, speed rating and load carrying
capacity as originally equipped. For addi-
tional information, see “Wheels and tires”
(P. 10-10).
WARNING
• The use of tires other than those recom-
mended or the mixed use of tires of dif-
ferent brands, construction (bias, bias-
belted or radial), or tread patterns can
adversely affect the ride, braking, han-
dling, VDC system, ground clearance,
body-to-tire clearance, tire chain clear-
ance, speedometer calibration, headlight
aim and bumper height. Some of these
effects may lead to accidents and could
result in serious personal injury.
• For 2WD models, if your vehicle was
originally equipped with four tires that
were the same size and you are only re-
placing two of the four tires, install the
new tires on the rear axle. Placing new
tires on the front axle may cause loss of
vehicle control in some driving condi-
tions and cause an accident and personal
injury. •
If the wheels are changed for any reason,
always replace with wheels which have
the same off-set dimension. Wheels of a
different off-set could cause premature
tire wear, degrade vehicle handling char-
acteristics, affect the VDC system
and/or interference with the brake
discs. Such interference can lead to de-
creased braking efficiency and/or early
brake pad wear. For additional informa-
tion on wheel off-set dimensions, see
“Wheels and tires” (P. 10-10).
• When using a wheel without the TPMS,
such as the spare tire, the TPMS will not
function and the low tire pressure
warning light will flash for approxi-
mately 1 minute. The light will remain on
after 1 minute. Have your tires replaced
and/or TPMS system reset as soon as
possible. It is recommended that you
visit an INFINITI retailer for this service.
• Replacing tires with those not originally
specified by INFINITI could affect the
proper operation of the TPMS.
• The TPMS sensor may be damaged if it is
not handled correctly. Be careful when
handling the TPMS sensor. •
When replacing the TPMS sensor, the ID
registration may be required. It is recom-
mended that you visit an INFINITI re-
tailer for ID registration.
• Do not use a valve stem cap that is not
specified by INFINITI. The valve stem cap
may become stuck.
• Be sure that the valve stem caps are cor-
rectly fitted. Otherwise the valve may be
clogged up with dirt and cause a mal-
function or loss of pressure.
• Do not install a damaged or deformed
wheel or tire even if it has been repaired.
Such wheels or tires could have struc-
tural damage and could fail without
warning.
• The use of retread tires is not recom-
mended.
• For additional information regarding
tires, refer to “Important Tire Safety In-
formation” (US) or “Tire Safety Informa-
tion” (Canada) in the Warranty Informa-
tion Booklet.
8-40Do-it-yourself

Doors and engine hood:Check that the doors
and engine hood operate properly. Also en-
sure that all latches lock securely. Lubricate
hinges, latches, latch pins, rollers and links if
necessary. Make sure that the secondary
latch keeps the hood from opening when the
primary latch is released.
When driving in areas using road salt or
other corrosive materials, check lubrication
frequently.
Check that the gas stays or struts properly
and securely hold the hood, trunk, or rear
hatch in a fully open position. If the hood,
trunk, or rear hatch is not held open, have the
gas stays or struts replaced.
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 miss-
ing, and check for any loose wheel nuts.
Tighten if necessary.
Tire rotation*: Rotate tires at the specified
interval shown in the maintenance schedule. Tires*:Check the pressure with a gauge often
and always prior to long distance trips. If nec-
essary, adjust the pressure in all tires, including
the spare, to the pressure specified. Check
carefully for damage, cuts or excessive wear.
Tire Pressure Monitoring System (TPMS)
tire pressure sensor: It is recommended that
you replace TPMS tire pressure sensor as-
sembly 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 un-
even or abnormal tire wear, there may be a
need for wheel alignment.
If the steering wheel or seat vibrates at nor-
mal 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. It is recommended that you have a damaged windshield repaired by an INFINITI
retailer, or an INFINITI Certified Collision Cen-
ter. To locate a collision center in your area,
refer to http://collision.infinitiusa.com.
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.
Brake pedal: Check the pedal for smooth op-
eration. 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 that 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.
Maintenance and schedules9-3

11 Index
A
Active Engine Brake...............5-145
Activenoisecancellation ...........5-154 Active sound enhancement ........5-154
ActiveRideControl...............5-146
ActiveTraceControl ..............5-144
Aiming control, headlights ...........2-45
Air bag (See supplemental restraint
system).........................1-41
Air bag system ....................1-49
Front (See supplemental front impact air
bagsystem)....................1-49
Air bag warning labels ..............1-61
Air bag warning light, supplemental .....1-62
Airbagwarninglight...............1-62
Air cleaner housing filter .............8-16
Air cleaner .......................8-16
Air conditioner ....................4-36
Air conditioner operation ..........4-36
Air conditioner specification label . . .10-13
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 ..............1-26
Antenna ........................4-43 Anti-lock brake warning ligh
t.........2-10
Anti-lock Braking System (ABS) ......5-140
Antifreeze ......................5-153
Armrests.........................1-5
Around View® Monitor .............4-11
Autolightswitch..................2-40
Automatic anti-glare inside mirror ......3-34
Automaticbrakehold...............5-26
Automatic door locks ................3-6
Automatic.......................2-74 Automatic power window switch ....2-74
B
Battery replacement...............8-22
INFINITI Intelligent Key ...........8-22
Keyfob.......................8-22
Battery........................5-153 Charge warning light .............2-11
Before starting the engine ...........5-16
Belt (See drive belt) ................8-15
Blind Spot Intervention® (BSI) ........5-54
Blind Spot Warning (BSW) ...........5-45
Boosterseats ....................1-38
Brake Assist .....................5-141
Brakefluid ......................8-10
Brakesystem ...................5-140
Brake.........................5-140 Anti-lock Braking System (ABS) ....5-140
Brakefluid ....................8-10 Brakelight(Seestoplight).........
8-25
Brake system .................5-140
Brakewarninglight..............2-10
Brake wear indicators ........2-18,8-19
Self-adjusting brakes .............8-19
Brakes .........................8-19
Break-in schedule ................5-132
Brightnesscontrol.................2-46 Instrument panel ................2-46
Bulb check/instrument panel .........2-10
Bulb replacement .................. 8-25
C
C.M.V.S.S. certification label .........10-12
Camera Aiding Sonar (parking sensor) . . .4-24
Capacities and recommended
fuel/lubricants....................10-2
Car phone or CB radio ..............4-44
Cargo (See vehicle loading
information).....................10-17
Cargoareastoragebin.............. 2-65
Cargocover...................... 2-71
Cargolight ......................2-79
Chassis control ..................5-144
Check tire pressure ................ 2-28
Child restraint with top tether strap .....1-26
Child restraints ...................1-20
LATCH (Lower Anchors and Tethers
forCHildren)System.............1-24

Mirrors..........................3-34
Moonroof ........................2-75
Moving Object Detection (MOD) .......4-29
O
Octane rating (See fuel octane rating) . . .10-5
Odometer.........................2-5
Oil.............................10-2 Capacities and recommended
fuel/lubricants ..................10-2
Changing engine oil filter ............8-7
Changing engine oil ................8-7
Checking engine oil level ............8-6
Engine oil and oil filter
recommendation .................10-6
Engine oil viscosity ...............10-7
Engine oil .......................8-6
Outside mirrors ....................3-35
Overhead sunglasses holder ..........2-63
Overheat .........................6-7
If your vehicle overheats ............6-7
Owner's manual order form ..........10-37
Owner's manual/service manual order
information......................10-37
P
Parking brake .....................2-11
Parking .........................5-136
Parking/parking on hills ...........5-136
Personal lights ....................2-79
Power outlet .....................2-59 Power steering
...................5-137
Power ...........................3-5
Power door locks .................3-5
Power outlet ...................2-59
Power rear windows ..............2-74
Power steering system ......5-137, 5-138
Power windows .................2-72
Rear power windows .............2-74
Precautions .......................8-2 Maintenance precautions ...........8-2
On-pavement and off-road driving
precautions .....................5-8
Precautions on booster
seats............1-22,1-29,1-34,1-38
Precautions on child
restraints .........1-22,1-29,1-34,1-38
Precautionsonseatbeltusage.......1-12
Precautions on supplemental restraint
system ........................1-41
Precautions when starting and
driving .....................5-4,5-10
Predictive Forward Collision Warning
(PFCW)........................5-120
ProPILOT Assist ...................5-73
Push starting ......................6-7
R
Radio...........................4-44
Car phone or CB radio ............4-44
Rainsensor.......................2-37
Readiness for inspection maintenance
(I/M)test.......................10-35 Rear Automatic Braking (RAB)
.........2-17
Rear bench seat adjustment ............1-5
Rear Cross Traffic Alert (RCTA) ........5-66
Rear Door Alert ...................2-25
Rear power sunshade ...............2-75
Rear power windows ...............2-74
Rear window defroster, outside mirror
defroster,andwiperdeicerswitch......2-39
Rear window wiper and washer
switches.........................2-38
RearView Monitor ..................4-3
Recommended Fluids ...............10-2
Recorders.......................10-36 EventData....................10-36
Refrigerant recommendation ..........10-7
Registering a vehicle in another
country.........................10-11
Remote Engine Start ................3-18
Reporting safety defects (US only) .....10-34
Roadside assistance program ...........6-2
Roof rack ........................2-66
S
Safety ...........................3-6
Child safety rear door lock ...........3-6
Childseatbelts ....1-22,1 -29, 1-34, 1-38
Reporting safety defects (US only) . . .10-34
Seat adjustment ....................1-3
Front power seat adjustment .........1-3
Rear bench seats ..................1-5
Seat belt extenders .................1-19
Seat belt warning light ...............1-15
11-5