2020 ACURA NSX traction

346
uuWhen DrivinguVehicle Stability AssistTM
(VSA ®), aka Electronic Stability Control (ESC), System
Driving
Vehicle Stability Assist TM
(VSA ®), aka Electronic
Stability Control (ESC), System VSA ® helps to stabilize the vehicle during cornering if the vehicle turns more or less
than what was intended. It also assists in maintaining traction on slippery surfaces.
It does so by regulating engine and motor output and selectively applying the brakes.
When VSA® activates, you may notice that the
engine and motor do not respond to the
accelerator. You may also notice some noise
from the hydraulic system . You will also see
the indicator blink.
■VSA ® Operation
1Vehicle Stability Assist TM
(VSA ®), aka Electronic Stability Control
(ESC), System
VSA ® may not function properly if tire type and size
are mixed. Make sure to use the same size and type of tire, and the air pr essures as specified.
2 Tire and Wheel Replacement P. 413
When the VSA ® system indicator comes on and stays
on while driving, there ma y be a problem with the
system. While this may not interfere with normal
driving, have your vehicle checked by an authorized
Acura NSX dealer immediately.
VSA ® cannot enhance stability in all driving situations
and does not control the en tire braking system. You
still need to drive and corner at speeds appropriate
for the conditions and always leave a sufficient
margin of safety.
The main function of the VSA ® system is generally
known as Electronic Stab ility Control (ESC). The
system also includes a traction control function.
VSA® System
Indicator
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Continued347
uuWhen DrivinguVehicle Stability AssistTM
(VSA ®), aka Electronic Stability Control (ESC), System
Driving
This button is on the driver side control panel.
This button is used to change VSA ® modes.
See below for more information. VSA ® is turned on every time you turn the
power system on, even if you press the button
the last time you drove the vehicle.
■ When the Integrated Dynamics Syst em mode is in QUIET mode, SPORT
mode, or SPORT+ mode To enter Stuck Vehicle Assist mode, press
the VSA ® OFF button until a single beep is
heard and the VSA ® OFF indicator illuminates.
uThis message appears on the driver
information interface for a few seconds.
If the Integrated Dyna mics System mode is
changed, VSA ® will remain in Stuck Vehicle
Assist mode.
To exit Stuck Vehicle Assist mode, press the
VSA ® OFF button until a single beep is heard
and the VSA ® OFF indicator extinguishes.
■VSA ® On and Off1Vehicle Stability Assist TM
(VSA ®), aka Electronic Stability Control
(ESC), System
In Stuck Vehicle Assist mode, your vehicle will have
normal braking and corn ering ability, but VSA®
traction and stability enhancement becomes less
effective.
In certain unusual conditions when your vehicle gets
stuck in shallow mud or fr esh snow, it may be easier
to free it with Stuck Vehicle Assist mode.
In Stuck Vehicle Assist mode, the traction control
function becomes less effective. This allows for the
wheels to spin more freely at low speed. You should
only attempt to free your vehicle with the button
pressed if you are not ab le to free it without.
Immediately after freeing your vehicle, be sure to
press the button again. We do not recommend driving your vehicle with Stuck Vehicle Assist mode.
You may hear a motor sound coming from the front
of the vehicle while system checks are being
performed immediately after turning the power
system on or while driving. This is normal.VSA ® OFF Indicator
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uuWhen DrivinguVehicle Stability AssistTM
(VSA ®), aka Electronic Stability Control (ESC), System
348
Driving
■ When the Integrated Dynamics System mode is in TRACK mode
When you set the Integrated Dynamics System mode to TRACK, the VSA ® system
switches to Track mode and the VSA ® OFF indicator comes on. The VSA ® features
do not stop, but the thresholds for them to activate become higher. Additional care
should be used while driving in TRACK mode, and TRACK mode should only be
used while driving on closed circuits.
To enter Stuck Vehicle Assist mode, press
the VSA ® OFF button until a single beep is
heard.
uThis message appears on the driver
information interface for a few seconds.
If the Integrated Dynamics System mode is
changed, VSA ® will remain in Stuck Vehicle
Assist mode.
To exit Stuck Vehicle Assist mode, press the
VSA ® OFF button until a single beep is heard.
uThis message appears on the driver
information interface.
1When the Integrated Dynamics System mode is in TRACK mode
In OFF mode, your vehicle wi ll have normal braking
and cornering ability, bu t it will not have VSA®
traction and stability enhancement.
When the VSA ® system is off, the traction control
system and agile handling assist system are also off.
We do not recommend driving your vehicle with the
VSA ®, traction control syst em, and agile handling
assist system switched off.
If the low tire pressure/TPMS indicator comes on or
blinks, the VSA ® system comes on automatically. In
this case, you can select Stuck Vehicle Assist mode
to free a stuck vehicle, but you cannot select the
VSA ® OFF mode by pressing the button.
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410
uuChecking and Maintaining TiresuDOT Tire Quality Grading (U.S. Vehicles)
Maintenance
DOT Tire Quality Grading (U.S. Vehicles)
The tires on your vehicle meet all U.S. Federal Safety
Requirements. All tires are also graded for treadwear, traction,
and temperature performance a ccording to Department of
Transportation (DOT) standards. The following explains these
gradings.
Quality grades can be found where applicable on the tire sidewall
between tread shoulder an d maximum section width.
The treadwear grade is a comparative rating based on the wear
rate of the tire when tested un der controlled conditions on a
specified government test course. For example, a tire graded 150
would wear one and one-half (1 1/2) times as well on the
government course as a tire grad ed 100. The relative performance
of tires depends upon the actual co nditions of their use, however,
and may depart significantly from the norm due to variations in
driving habits, service practices and differences in road
characteristics and climate.
■Uniform Tire Quality Grading
■Treadwear
1Uniform Tire Quality Grading
For example:
Treadwear 200
Traction AA
Temperature A
All passenger car tires must conform
to Federal Safety Requirements in
addition to these grades.
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411
uuChecking and Maintaining TiresuDOT Tire Quality Grading (U.S. Vehicles)
Maintenance
The traction grades, from highest to lowest, are AA, A, B, and C.
Those grades represent the tire’s ability to stop on wet pavement
as measured under controlled conditions on specified government test surfaces of asph alt and concrete. A tire marked
C may have poor traction performance.
The temperature grades are A (the highest), B, and C,
representing the tire’s resistance to the generation of heat and its
ability to dissipate heat when te sted under controlled conditions
on a specified indoor laboratory test wheel. Sustained high
temperature can cause the material of the tire to degenerate and
reduce tire life, and ex cessive temperature can lead to sudden tire
failure. The grade C corresponds to a level of performance which
all passenger car tires must meet under the Federal Motor Vehicle
Safety Standard No. 109. Grades B and A represent higher levels
of performance on the laboratory test wheel than the minimum
required by law.
■Traction
■Temperature
1Traction
Warning: The traction grade
assigned to this tire is based on straight-ahead braking traction tests,
and does not include acceleration,
cornering, hydroplaning, or peak
traction characteristics.
1TemperatureWarning: The temperature grade for
this tire is establishe d for a tire that is
properly inflated and not
overloaded. Excessive speed,
underinflation, or excessive loading, either separately or in combination,
can cause heat buildup and possible tire failure.
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412
uuChecking and Maintaining TiresuWear Indicators
Maintenance
Wear IndicatorsThe groove where the wear indicator is
located is 1/16 inch (1.6 mm) shallower than
elsewhere on the tire. If the tread has worn so
that the indicator is exposed, replace the tire.
Worn out tires have poor traction on wet roads.
Tire Service Life
The life of your tires is dependent on many factors, including driving habits, road
conditions, vehicle loading, inflation pre ssure, maintenance history, speed, and
environmental conditions (even when the tires are not in use).
In addition to regular inspections and inflation pressure maintenance, it is
recommended that you have annual inspections performed once the tires reach five
years old. All tires should be removed fro m service after 10 years from the date of
manufacture, regardless of their condition or state of wear.
1Checking Tires
High speed driving
We recommend that you do not drive on public roads faster than the posted sp eed limits and conditions
allow. If you intend to driv e at sustained high speeds
(over 168 mph or 270 km/h), such as at a track or
other closed course venue , adjust the cold tire
pressures as shown below to avoid excessive heat
build up and sudden tire failure.
Tire SizeFront:
245/35ZR19 (93Y)Rear:
305/30ZR20 (103Y)
Pressure Front: 38 psi (260 kPa, 2.6 kgf/cm 2
)
Rear:
38 psi (260 kPa, 2.6 kgf/cm 2
)
Example of a Wear
Indicator mark
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415
uuChecking and Maintaining TiresuWinter Tires
Maintenance
Winter Tires
If driving on snowy or frozen roads, mount all-season marked M+S tires, snow tires,
or tire chains; reduce speed; and maintain sufficient distance between vehicles when
driving.
Be particularly careful wh en operating the steering wheel or brakes to prevent
skidding.
Use tire chains, snow tires, or all-season tires when necessary or according to the law.
When mounting, refer to the following points.
For winter tires: • Mount the tires to all four wheels.
For tire chains:• Install them on the rear tires only.
• Because your vehicle has limited tire clea rance, we strongly recommend using the
chains listed below:
*1:Tire chains to be used only on optional 295/30R20 winter tires.
*2:Tire chains to be used only on optional 305/30R20 winter tires.• Follow the chain manufactur er’s instruction when installing. Mount them as
tightly as you can.
• Check that the chains do not touc h the brake lines or suspension.
• Drive slowly.
Recommended Winter Tires: •Michelin Alpin PA4
Front: 245/35R19 (93W)
Rear: 295/30R20 (97V)• Pirelli SottoZero 3
Front: 245/35R19 (93W)
Rear: 305/30R20 (103W)
• Auto-trac 232405 *1
• K-Summit K-44 *2
1Winter Tires
NOTICE
Traction devices that are the wrong size or improperly
installed can damage your
vehicle’s brake lines,
suspension, body, and wheels. Stop driving if they are hitting any part of the vehicle.
When tire chains are mounted, follow the chain
manufacturer’s instructi ons regarding vehicle
operational limits.
If your vehicle is equipp ed with summer tires, be
aware that these tires are not designed for winter
driving conditions. For more information, contact an
authorized Acura NSX dealer.
3WARNING
Using the wrong chains, or not properly
installing chains, can damage the brake
lines and cause a crash in which you can be
seriously injured or killed.
Follow all instruction s in this owner’s
manual regarding the selection and use of
tire chains.
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