2020 INFINITI Q50 ABS

5-128Starting and driving
faces will be longer than on normal
surfaces even with ABS. Stopping
distances may also be longer on
rough, gravel or snow covered roads,
or if you are using tire chains. Always
maintain a safe distance from the
vehicle in front of you. Ultimately,
the driver is responsible for safety.
. Tire type and condition may also
affect braking effectiveness.
— When replacing tires, install the specified 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. See
“Tire and loading information la-
bel” (P.10-13) of this manual.
— For detailed information, see “Wheels and tires” (P.8-26) of
this manual.
The Anti-lock Braking System (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
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.

5-130Starting and driving
techniques. Reduce vehicle speed and
be especially careful when driving and
cornering on slippery surfaces and
always drive carefully.
. The brake force distribution system
may not be effective depending on
the driving condition. Always drive
carefully and attentively.
. Do not modify the vehicle’s suspen-
sion. If suspension parts such as
shock absorbers, struts, springs, sta-
bilizer bars, bushings and wheels are
not INFINITI recommended for your
vehicle or are extremely deteriorated,
the VDC system may not operate
properly. This could adversely affect
vehicle handling performance, and
the VDC warning light
may
illuminate.
. If brake related parts such as brake
pads, rotors and calipers are not
INFINITI recommended or are extre-
mely deteriorated, the VDC system
may not operate properly and the
VDC warning light
may illumi-
nate.
. If engine control related parts are not
INFINITI recommended or are extre-
mely deteriorated, the VDC warning
light
may illuminate. .
When driving on extremely inclined
surfaces such as higher banked cor-
ners, the VDC system may not oper-
ate properly and the VDC warning
light
may illuminate. Do not drive
on these types of roads.
. When driving on an unstable surface
such as a turntable, ferry, elevator or
ramp, the VDC warning light
may
illuminate. This is not a malfunction.
Restart the engine after driving onto
a stable surface.
. If wheels or tires other than the
INFINITI recommended ones are
used, the VDC system may not oper-
ate properly and the VDC warning
light
may illuminate.
. The VDC system is not a substitute
for winter tires or tire chains on a
snow covered road. This system senses driving based on the
driver’s steering and acceleration/braking
patterns, and controls brake pressure at
individual wheels to help smooth vehicle
response.
When the SPORT mode is selected by the
INFINITI Drive Mode Selector, the amount
of brake control provided by the active trace
control is reduced.
When the PERSONAL mode is selected, the
active trace control can be set to ON
(enabled) or OFF (disabled). See “INFINITI
Drive Mode Selector” (P.5-21).
When the VDC OFF switch is used to turn
off the VDC system, the active trace control
is also turned off.
ACTIVE TRACE CONTROL

JVM0257X
Extended storage fuse switch (if so
equipped)
To reduce battery drain, the extended
storage fuse 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 the extended storage fuse switch is not
pushed in (switched on), the “Shipping Mode
On, Push Storage Fuse” warning may appear
in the vehicle information display. See “19.
Extended storage fuse warning” (P.2-21).
If any electrical equipment does not operate,
remove the extended storage fuse switch
and check for an open fuse.NOTE:
If the extended storage fuse switch mal-
functions or if the fuse is open, it is not
necessary to replace the switch. In this case,
remove the extended storage fuse switch
and replace it with a new fuse of the same
rating.
How to remove the extended storage fuse
switch:
1. To remove the extended storage fuse
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
found on each
side of the storage fuse switch.
5. Pull the storage fuse switch straight out from the fuse box
.
CAUTION
Be careful not to allow children to
swallow the battery and removed parts.
Do-it-yourself8-19
INTELLIGENT KEY BATTERY
REPLACEMENT

11 Index
A
ABS (Anti-lock Braking System) ................... 5-127
Active Lane Control ............................................ 5-25
Active noise cancellation ................................. 5-138
Active sound enhancement ............................ 5-138
Active trace control ......................................... 5-130
Air bag systemFront-seat mounted side-impact
supplemental air bag system ..................... 1-55
Roof-mounted curtain side-impact
supplemental air bag system ..................... 1-55
Air bag warning labels ....................................... 1-58
Air bag warning light .............................. 1-58, 2-15
Air cleaner housing filter ................................... 8-15
Air conditioner
Air conditioner operation ............................ 4-36
Air conditioner service ................................ 4-42
Air conditioner specification label ......... 10-13
Air conditioning system refrigerant
and lubricant recommendations .... 4-42, 10-7
Automatic air conditioner ........................... 4-37
DUAL mode setting ..................................... 4-40
Heater and air conditioner .......................... 4-36
Servicing air conditioner ............................. 4-42
Air deflectors ...................................................... 10-15
Alarm How to stop alarm (see vehicle
security system) ............................................ 2-30
Alcohol, drugs and driving ................................ 5-10 Antenna .................................................................. 4-43
Anti-lock Braking System (ABS) ................... 5-127
Appearance care
Exterior appearance care ............................... 7-2
Interior appearance care ................................ 7-5
Armrest ...................................................................... 1-7
Around View
®Monitor ...................................... 4-11
Audible reminders ................................................. 2-17
Autolight system .................................................. 2-35
Automatic Automatic air conditioner ........................... 4-37
Automatic Transmission Fluid (ATF) ......... 8-9
Driving with automatic transmission ....... 5-16
Automatic door locks ............................................ 3-5
Automatic drive positioner ............................... 3-32
Automatic seat positioner ................................ 3-32
Avoiding collision and rollover ............................ 5-9
B
Back-up Collision Intervention (BCI) .............. 5-61
Battery .................................................................... 8-11
Battery replacement, Intelligent Key ......... 3-2
Battery saver system .................................... 2-38
Intelligent Key ................................................. 8-19
Variable voltage control system ............... 8-13
Before starting the engine ................................ 5-14
Belts (See drive belts) ......................................... 8-13
Blind Spot Intervention
®(BSI) ......................... 5-48
Blind Spot Warning (BSW) .............................. 5-40 Brake
Anti-lock Braking System (ABS) ............. 5-127
Brake fluid ...................................................... 8-10
Brake force distribution ............................. 5-129
Brake system ................................................ 5-126
Parking brake operation ............................. 5-20
Brake warning light .............................................. 2-11
Break-in schedule .............................................. 5-119
Bulb check/instrument panel ........................... 2-10
Bulb replacement ................................................. 8-22
C
Camera aiding sonar function ......................... 4-25
Capacities and
recommended fluids/lubricants ....................... 10-2
Car phone or CB radio ....................................... 4-43
Card holder ............................................................ 2-48
Catalytic converter Three-way catalyst ......................................... 5-5
Changing intercooler coolant ............................. 8-6
Chassis control ................................................... 5-132
Check tire pressure warning ............................. 2-21
Checking intercooler coolant level .................... 8-6
Child restraints ...................................................... 1-21 LATCH system ............................................... 1-23
Precautions on child restraints .................. 1-21
Child safety ............................................................ 1-19
Child safety rear door lock .................................. 3-6

11-8
Variable voltage control system ..................... 8-13
VehicleDimensions ................................................... 10-10
Recovery (freeing a stuck vehicle) ............ 6-10
Vehicle Dynamic Control (VDC)
off switch ......................................................... 2-41
Vehicle dynamic control
(VDC) system ................................................ 5-129
Vehicle Dynamic Control (VDC)
warning light ................................................... 2-15
Vehicle identification number (VIN) ............. 10-11
Vehicle information display .............................. 2-18
Vehicle loading information ............................ 10-16
Vehicle security system ...................................... 2-29
Vehicle speedAverage speed ............................ 2-26
Ventilators ............................................................. 4-35
W
Warning Flat Tire - Visit dealer warning ................. 2-21
Hazard warning flasher switch .................... 6-2
Indicators for operation (vehicle
information display) ...................................... 2-20
Lights ................................................................ 2-10
Power steering warning light ..................... 2-14
Predictive Forward Collision
Warning (PFCW) ........................................ 5-110
Tire Pressure Monitoring
System (TPMS) ........................... 5-5, 6-3, 8-26
Vehicle information display ........................ 2-18 Warning lights, indicator lights and
audible reminders .......................................... 2-10
Warning labels Air bag warning labels ................................. 1-58
Warning light Air bag warning light ........................ 1-58, 2-15
Anti-lock braking system (ABS)
warning light ................................................... 2-10
Brake warning light ....................................... 2-11
Forward Emergency Braking (FEB)
system warning light .................................... 2-11
Low fuel warning light ................................. 2-12
Low tire pressure warning light ................ 2-12
Seat belt warning light and chime ............ 2-14
Warranty Emission control system warranty ........ 10-20
Washer switch Wiper and washer switch ........................... 2-31
Washing .................................................................... 7-2
Waxing ....................................................................... 7-2
Welcome light and farewell light function .... 3-10
Wheel/tire size ..................................................... 10-9
Wheels and tires .................................................. 8-26
Care of wheels .................................................. 7-3
Cleaning aluminum alloy wheels .................. 7-3
Cleaning bright wheels .................................. 7-4
Window washer fluid ......................................... 8-10
Window(s)
Cleaning ............................................................... 7-3
Power windows ............................................. 2-49 Wiper
Rain-sensing auto wiper system ............... 2-33
Wiper and washer switch ........................... 2-31
Wiper blades ................................................... 8-15
Wiper and washer switch ................................. 2-31