traction control Acura RL 2004 3.5 Owner's Manual

this defeats the
purpose of the ABS. Let the ABS
work f or you by always keeping f irm,
steady pressure on the brake pedal
as you steer away from the hazard.
This is sometimes ref erred to as
You will f eel a pulsation in the brake
pedal when the ABS activates, and
you may hear some noise. This is
normal; it is the ABS rapidly
pumping the brakes.
Activation varies with the amount of
traction your tires have. On dry
pavement, you will need to press on
thebrakepedalveryhardbeforeyou
activate the ABS. However, you may
feel the ABS activate immediately if
you are trying to stop on snow or ice.
Your car has an Anti-lock Brake
System (ABS) as standard
equipment. ABS helps to prevent the
wheels f rom locking up and skidding
during hard braking, allowing you to
retain steering control.
When the f ront tires skid, you lose
steering control; the vehicle
continues straight ahead even
though you turn the steering wheel.
The ABS helps to prevent lock-up
and helps you retain steering control
by pumping the brakes rapidly; much
f aster than a person can do it.
The ABS also balances the f ront-to
rear braking distribution according
to vehicle loading.
The hydraulic system that operates
the brakes has two separate circuits.
Each circuit works diagonally across
the vehicle (the lef t-f ront brake is
connected with the right-rear brake,
etc.). If one circuit should develop a
problem, you will still have braking
at two wheels.
‘‘stomp and steer.’’
Brake System Design
A nti-lock BrakesYou should never pump the
brake pedal;
The Braking System
Driving224
Front

CONT INUED
When VSA activates, you may notice
that the engine does not respond to
the accelerator in the same way it
does at other times. You will also see
the VSA Activation Indicator blink.When VSA activates, you will see the
VSA Activation indicator blink.
The Vehicle Stability Assist system
helps to stabilize the vehicle during
cornering if the vehicle turns more
or less than desired. It also assists
you in maintaining traction while
accelerating on loose or slippery
road surf aces. It does this by
regulating the engine’s output, and
by selectively applying braking.
The VSA system cannot enhance the
vehicle’s driving stability in all
situations and does not control your
car’s entire braking system. It is still
your responsibility to drive and
corner at reasonable speeds and to
leave a sufficient margin of safety.
Driving
Vehicle Stability Assist (VSA) System
VSA A ct ivat ion Indicat or
227
VSA ACTIVATION INDICATOR

µExercise extra caution when driving
in rain af ter a long dry spell. Af ter
months of dry weather, the f irst
rains bring oil to the surf ace of the
roadway, making it slippery.
Rain, f og, and snow conditions
require a dif f erent driving technique
because of reduced traction and
visibility. Keep your car well-
maintained and exercise greater
caution when you need to drive in
bad weather. The cruise control
should not be used in these
conditions. Always drive
slower than you would in dry
weather. It takes your car longer to
react, even in conditions that may
seem just barely damp. Apply
smooth, even pressure to all the
controls. Abrupt steering wheel
movements or sudden, hard appli-
cation of the brakes can cause loss of
control in wet weather. Be extra
cautious f or the f irst f ew miles
(kilometers) of driving while you
adjust to the change in driving
conditions. This is especially true in
snow. A person can f orget some
snow-driving techniques during the
summer months. Practice is needed
to relearn those skills. Driving T echnique
Driving
Driving in Bad Weather
230

µµBeing able to see
clearly in all directions and being
visible to other drivers are important
in all weather conditions. This is
more dif f icult in bad weather. To be
seen more clearly during daylight
hours, turn on your headlights. Check your tires
f requently f or wear and proper
pressure. Both are important in
preventing ‘‘hydroplaning’’ (loss of
traction on a wet surface). In the
winter, mount snow tires on all f our
wheels f or the best handling.
Watch road conditions caref ully,
they can change f rom moment to
moment. Wet leaves can be as slip-
pery as ice. ‘‘Clear’’ roads can have
patches of ice. Driving conditions
can be very hazardous when the
outside temperature is near f reezing.
The road surf ace can become
covered with areas of water puddles
mixed with areas of ice, so your
traction can change without warning.
Be caref ul when downshif ting. If
traction is low, you can lock up the
drive wheels f or a moment and cause
askid.
Inspect your windshield wipers and
washers f requently. Keep the wind-
shield washer reservoir f ull of the
proper f luid. Have the windshield
wiper blades replaced if they start to
streak the windshield or leave parts
unwiped. Use the def roster and air
conditioning to keep the windows
f rom f ogging up on the inside (see
pages and ).
Be very cautious when passing, or
beingpassedbyothervehicles.The
spray f rom large vehicles reduces
your visibility, and the wind buf f eting
can cause you to lose control.
126 131
Visibility
Traction
Driving in Bad Weather
Driving231

Your Acura has been designed
primarily to carry passengers and
their cargo. You can use it to tow a
trailer if you caref ully observe the
load limits, use the proper equipment,
and f ollow the guidelines in this
section.The weight that
the tongue of a f ully-loaded trailer
puts on the hitch should be
approximately 10 percent of the
trailer weight. Too little tongue
load can make the trailer unstable
and cause it to sway. Too much
tongue load reduces f ront-tire
traction and steering control.
The total
weight of the trailer and
everything loaded in it must not
exceed 2,000 lbs (900 kg). Towing
a load that is too heavy can
seriously af f ect your car’s
handling and perf ormance. It can
also damage the engine and
drivetrain.
Driving
Towing a Trailer
Load Limits
Tongue Load:
T otal T railer Weight:
232

Thediagramsinthissectiongive
you the dimensions and capacities of
your Acura, and the locations of the
identif ication numbers. It also
includes inf ormation you should
know about your car’s tires and
emissions control systems.................
Identif ication Numbers . 336
................................
Specif ications .338
DOT Tire Quality Grading .............................
(U.S.Cars) .340
.................................
Treadwear .340
......................................
Traction .340
.............................
Temperature .341
...........................
Tire Inf ormation .342
.........................
Oxygenated Fuels .343
......
Driving in Foreign Countries . 344.......................
Emissions Controls .345
.....................
The Clean Air Act .345
Crankcase Emissions Control ....................................
System .345
Evaporative Emissions Control ....................................
System .345
Onboard Ref ueling Vapor ................................
Recovery .345
...
Exhaust Emissions Controls . 346
....................
PGM-FI System .346
Ignition Timing Control ................................
System .346
Exhaust Gas Recirculation ...................
(EGR) System . 346
Three Way Catalytic ...........................
Converter .346
....................
Replacement Parts . 346
..
Three Way Catalytic Converter . 347
..............
State Emissions Testing . 348
T echnical Inf ormat ion
T echnical Inf ormation335

µ
The treadwear grade is a compara-
tive rating based on the wear rate of
the tire when tested under controlled
conditions on a specif ied 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 graded
100. The relative perf ormance of
tires depends upon the actual condi-
tions of their use, however, and may
depart signif icantly f rom the norm
due to variations in driving habits,
service practices and dif f erences in
road characteristics and climate.
The tires on your car meet all U.S.
Federal Saf ety Requirements. All
tires are also graded for treadwear,
traction, and temperature perform-
ance according to Department of
Transportation (DOT) standards.
The f ollowing explains these
gradings.
Quality grades can be f ound where
applicable on the tire sidewall
between the tread shoulder and the
maximum section width. For
example:
The traction grades, f rom 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
specif ied government test surf aces
of asphalt and concrete. A tire
marked C may have poor traction
perf ormance.
Warning: The traction grade
assignedtothistireisbasedon
straight-ahead braking traction tests,
and does not include acceleration,
cornering, hydroplaning, or peak
traction characteristics.
All passenger vehicle tires must
conf orm to Federal Saf ety
Requirements in addition to these
grades. T readwear
Unif orm T ire Quality Grading T readwear 200
Traction AA
Temperature A Traction AA, A, B, C
DOT T ire Quality Grading (U.S. Cars)
T echnical Inf ormation340