2003 Acura MDX traction control

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.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
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 vehicle 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 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.
The ABS also balances the f ront-to
rear braking distribution according
to vehicle loading.
‘‘stomp and steer.’’
CONT INUED
You should never pump the
brake pedal;
Anti-lock Brakes
Brake System Design
Driving
The Braking System
263
Front

The VSA system cannot enhance the
vehicle’s driving stability in all
situations and does not control your
vehicle’s entire braking system. It is
still your responsibility to drive and
corner at reasonable speeds and to
leave a sufficient margin of safety.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.
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.
Driving
Vehicle Stability Assist (VSA) System
VSA A ct ivat ion Indicat or
266
VSA ACTIVATION INDICATOR

µµAlways drive
slower than you would in dry
weather. It takes your vehicle 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.
Exercise 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 re-
quire a dif f erent driving technique
because of reduced traction and
visibility. Keep your vehicle well-
maintained and exercise greater
caution when you need to drive in
bad weather. The cruise control
should not be used in these condi-
tions. Being 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.
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 rosters and air
conditioning to keep the windows
f rom f ogging up on the inside (see
page ). 140
CONT INUED
Driving T echnique Visibility
Driving in Bad Weather
Driving269

µCheck 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. 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.
Traction
Driving in Bad Weather
Driving270

Too much tongue load reduces f ront-
tire traction and steering control.
Too little tongue load can make the
trailer unstable and cause it to sway.The GCWR must be reduced 2
percent f or every 1,000 f eet (305
meters) of elevation. The maximum allowable weight of
the f ully loaded vehicle and trailer is
9700 lbs (4410 kg) with the proper
hitch and f luid coolers (See pagef or inf ormation about f luid
coolers.)
The maximum allowable weight of
the vehicle, all occupants, all cargo
and the tongue load is 5730 lbs (2600
kg).
The maximum allowable weights on
the vehicle axles are 2890 lbs (1310
kg) on the f ront axle, and 2945 lbs
(1335 kg) on the rear axle. 277
Gross Vehicle Weight Rating
(GVWR):
Gross Axle Weight Rating
(GA WR): Gross Combined Weight Rating
(GCWR):
Towing a Trailer
Driving272

The route presents limits (some
roads are too steep and bumpy f or
example). You have limits (in driving
skills and comf ort). And your vehicle
also has limits (traction, stability, and
power, f or instance).
Driving of f -highway can be
hazardous if you f ail to recognize
limits and take proper precautions.
For example, you can have an
accident or rollover during
maneuvers such as turning, driving
on hills, or over large obstacles.
Utility vehicles have a signif icantly
higher rollover rate than other types
of vehicles. To avoid loss of control
or rollover, be sure to f ollow all
recommendations and precautions
on page and in this section.
Seat belts are just as important of f -
road as on paved roads. Wherever
you drive, make sure you and your
passengers always wear seat belts. If
children or inf ants are along f or the
ride, see that they are properly
secured. In a rollover crash, an
unbelted person is more likely to die
than a person wearing a seat belt. On many unpaved roads, you won’t
f ind lane markers, traf f ic signals, or
signs to warn you of possible trouble
ahead. It’s up to you to continually
assess the situation and drive within
limits.
Remember that your MDX has
higher ground clearance and a
higher center of gravity than
passenger vehicles designed f or use
only on pavement. This means your
vehicle can more easily tip or roll
over if you make abrupt turns or
drive on slopes.
Be sure to store cargo properly, and
do not exceed your MDX’s cargo
load limits (see pages and ).
250
246 271
Important Saf ety Precautions
Off-Highway Guidelines
Driving286
Improperly operating this
vehicle on or off-pavement can
cause an accident or rollover in
which you and your passengers
could be seriously injured or
killed.
Follow all instructions and
guidelines in the owner’s
manual.
Keep your speed low and
don’t drive faster than
conditions permit.

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 vehicle’s tires and
emissions control systems.................
Identif ication Numbers . 388
................................
Specif ications .390
..........
DOT Tire Quality Grading . 392
Unif orm Tire Quality ..................................
Grading .392
.................................
Treadwear .392
......................................
Traction .392
.............................
Temperature .393
...........................
Tire Inf ormation .394 .........................
Oxygenated Fuels .395
......
Driving in Foreign Countries . 396
.......................
Emissions Controls .397
.....................
The Clean Air Act .397
Crankcase Emissions Control ....................................
System .397
Evaporative Emissions Control ....................................
System .397
Onboard Ref ueling Vapor ................................
Recovery .397
...
Exhaust Emissions Controls . 398
....................
PGM-FI System .398
Ignition Timing Control ................................
System .398
Exhaust Gas Recirculation ...................
(EGR) System . 398
Three Way Catalytic ...........................
Converter .398
....................
Replacement Parts . 398
..
Three Way Catalytic Converter . 399
T echnical Inf ormat ion
T echnical Inf ormation387

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 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.
The tires on your vehicle meet all
U.S. Federal Saf ety Requirements.
All tires are also graded f or
treadwear, traction, and temperature
perf ormance 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:
All passenger car tires must conf orm
to Federal Saf ety Requirements in
addition to these grades. Warning: The traction grade
assignedtothistireisbasedon
straight-ahead braking traction tests,
and does not include acceleration,
cornering, hydroplaning, or peak
traction characteristics.
T echnical Inf ormation
DOT T ire Quality Grading (U.S. Vehicles)
T readwear
Unif orm T ire Quality Grading Traction AA, A, B, C
T readwear 200
Traction AA
Temperature A
392