brake sensor INFINITI Q50 2018 User Guide

5-132Starting and driving
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
ABS will operate to prevent 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 dis-
tances.
Self-test feature
The 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 mal-function, 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 you visit
an INFINITI retailer for this service.
Normal operation
The ABS operates at speeds above 3 to 6
MPH (5 to 10 km/h).
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
properly. However, the pulsation may indi-
cate that road conditions are hazardous and
extra care is required while driving.
The Vehicle Dynamic Control (VDC) system
uses various sensors to monitor driver inputs
and vehicle motion. Under certain driving
conditions, the VDC system helps to perform
the following functions.
.
Controls brake pressure to reduce wheel
slip on one slipping drive wheel so power
is transferred to a non slipping drive
wheel on the same axle.
. Controls brake pressure and engine out-
put 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 following 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
maintain control of the vehicle, but it cannot
prevent loss of vehicle control in all driving
situations.
When the VDC system operates, the VDC
warning light
in the instrument panel
flashes so 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.
VEHICLE DYNAMIC CONTROL
(VDC) SYSTEM

6-4In case of emergency
is recommended you visit an INFINITI
retailer for these services.
. Replacing tires with those not origin-
ally specified by INFINITI could affect
the proper operation of the TPMS.
. Do not inject any tire liquid or aerosol
tire sealant into the tires, as this may
cause a malfunction of the tire pres-
sure sensors.
RUN-FLAT TIRES (if so equipped)
Run-flat tires are those tires that can be
used temporarily if they are punctured. See
“Run-flat tires” (P.8-39).
Also, refer to “Important Tire Safety Infor-
mation” (US) or “Tire Safety Information”
(Canada) in the INFINITI Warranty Informa-
tion Booklet.
WARNING
.Although you can continue driving
with a punctured run-flat tire, re-
member that vehicle handling stabi-
lity is reduced, which could lead to an
accident and personal injury. Also,
driving a long distance at high speeds
may damage the tires. .
Do not drive at speeds above 50
MPH (80 km/h) and do not drive
more than approximately 93 miles
(150 km) with a punctured run-flat
tire. The actual distance the vehicle
can be driven on a flat tire depends on
outside temperature, vehicle load,
road conditions and other factors.
. Drive safely at reduced speeds. Avoid
hard cornering or braking, which may
cause you to lose control of the
vehicle.
. If you detect any unusual sounds or
vibrations while driving with a punc-
tured run-flat tire, pull off the road
to a safe location and stop the vehicle
as soon as possible. The tire may be
seriously damaged and need to be
replaced.
CAUTION
.Never install tire chains on a punctu-
red run-flat tire, as this could damage
your vehicle.
. Avoid driving over any projection or
pothole, as the clearance between
the vehicle and the ground is smaller
than normal. .
Do not enter an automated car wash
with a punctured run-flat tire.
. It is recommended you have the
punctured tire inspected by an
INFINITI retailer or other authorized
repair shop. Replace the tire as soon
as possible if the tire is seriously
damaged.
CHANGING A FLAT TIRE
If you have a flat tire, follow the instructions
in this section to replace the tire with a spare
tire (if so equipped). For the vehicles with
run-flat tires, you can continue driving to a
safe location even if they are punctured. (See
“Run-flat tires” (P.6-4) and “Run-flat tires”
(P.8-39).)
This section also contains the information
about the vehicle jack-up procedures.
Stopping the vehicle
1. Safely move the vehicle off the road and
away from traffic.
2. Turn on the hazard warning flashers.
3. Park on a level surface and apply the parking brake. Move the shift lever to the
P (Park) position.
4. Turn off the engine.

Malfunction indicator light (MIL) ..................... 2-17
Map lights .............................................................. 2-55
Master warning light .......................................... 2-14
Mechanical key (Intelligent Key system) .......... 3-3
Memory storageAutomatic drive positioner ......................... 3-33
Meter
Trip computer ................................................. 2-27
Meters and gauges ................................................ 2-6 Instrument brightness control ................... 2-41
Mirror Inside mirror ................................................... 3-30
Outside mirrors .............................................. 3-31
Vanity mirror ................................................... 3-32
Moonroof ............................................................... 2-53
N
NAVI Shift Control .............................................. 5-20
New vehicle break-in ........................................ 5-122
O
Odometer .................................................................. 2-7
Off-road recovery .................................................. 5-9
Oil Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine oil and filter .................... 8-11
Checking engine oil level ............................. 8-11
Engine oil ........................................................ 8-10 One touch unlock sensor (See Intelligent
Key system) ........................................................... 3-10
Operation Indicators for operation ............................... 2-21
Outside air temperature .................................... 2-29
Outside mirrors .................................................... 3-31
Overheat, If your vehicle overheats ............... 6-16
Owner’s Manual/Service Manual
order information ............................................. 10-26
P
Panic alarm ............................................................ 3-18
Parking Parking brake operation .............................. 5-21
Parking on hills ............................................. 5-126
Parking brake break-in ................................... 5-130
Personal lights ...................................................... 2-55
PERSONAL mode ............................................... 5-25
Phone Car phone or CB radio ................................... 4-3
Power
Power door lock ............................................... 3-4
Power outlet ................................................... 2-45
Power steering fluid ..................................... 8-14
Power steering system .............................. 5-127
Power windows ............................................ 2-50
Power moonroof ................................................. 2-53
Power steering warning light ........................... 2-14
Precautions Braking precautions ................................... 5-130
Child restraints ............................................... 1-24 Cruise control ................................................. 5-71
Maintenance ..................................................... 8-3
Seat belt usage .............................................. 1-12
Supplemental restraint system .................. 1-42
When starting and driving ............................ 5-4
Pre-crash seat belts with
comfort function .................................................. 1-14
Predictive Forward Collision
Warning (PFCW) ............................................... 5-112
Push starting ......................................................... 6-16
Push-button ignition switch .............................. 5-11R
Radio Car phone or CB radio ................................... 4-3
Rain-sensing auto wiper system ..................... 2-34
Rapid air pressure loss .......................................... 5-9
Readiness for inspection/maintenance
(I/M) test (US only) .......................................... 10-25
Rear door lock Child safety rear door lock ........................... 3-6
Rear seats ................................................................. 1-5
Rear window and outside mirror
defroster switch ................................................... 2-35
Recorders Event data .................................................... 10-25
Registering your vehicle in
another country ................................................ 10-14
Remote engine start ........................................... 3-20
Remote keyless entry system .......................... 3-16
Reporting safety defects ................................ 10-24
11-5