2009 Acura MDX air condition

It is best to replace all four tires at
the same time. If that is not possible
or necessary, replace the two front
tires or two rear tires as a pair.
Replacing just one tire can seriously
affect your vehicle's handling.
If you ever replace a wheel, make
sure that the wheel's specifications
match those of the original wheels.
Also be sure you use only TPMS
specific wheels. If you do not, the tire
pressure monitoring system will not
work.
Replacement wheels are available at
your dealer.
Installing improper tires on your
vehicle can affect handling and
stability. This can cause a crash
in which you can be seriously
hurt or killed.
Always use the size and type of
tires recommended in this
owner's manual.
Wheel and Tire Specifications
Wheel: 18 x 8 J
Tires: P255/55R18 104H
See page454for information about
DOT Tire Quality Grading, and page
456for tire size and labeling
information. Winter Driving
Tires marked
‘‘M ＋ S’’ or ‘‘All
Season ’’on the sidewall have an all-
weather tread design suitable for
most winter driving conditions.
For the best performance in snowy
or icy conditions, you should install
snow tires or tire chains. They may
be required by local laws under
certain conditions.
Snow Tires
If you mount snow tires on your
vehicle, make sure they are radial
tires of the same size and load range
as the original tires. Mount snow
tires on all four wheels. The traction
provided by snow tires on dry roads
may be lower than your original tires.
Check with the tire dealer for
maximum speed recommendations.
CONTINUED
Tires
419
Maint enance
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2009 MDX

If this indicator comes on
while driving, it means one
of the engine's emissions control
systems may have a problem. Even
though you may feel no difference in
your vehicle's performance, it can
reduce your fuel economy and cause
increased emissions. Continued
operation may cause serious damage.
If you have recently refueled your
vehicle, the indicator coming on
could be due to a loose or missing
fuel fill cap. Tighten the cap until it
clicks at least once. Tightening the
cap will not turn the indicator off
immediately; it can take several days
of normal driving. If the indicator comes on repeatedly,
even though it may turn off as you
continue driving, have your vehicle
checked by the dealer as soon as
possible.
If you keep driving with the malfunction
indicator lamp on, you can damage
your vehicle's emissions controls and
engine. Those repairs may not be
covered by your vehicle's warranties.
You will also see a
‘‘CHECK
EMISSION SYSTEM ’’message on
the multi-information display (see
page81). Readiness Code
Your vehicle has certain
‘‘readiness
codes ’’that are part of the on-board
diagnostics for the emissions
systems. In some states, part of the
emissions testing is to make sure
these codes are set. If they are not
set, the test cannot be completed.
If the battery in your vehicle has
been disconnected or gone dead,
these codes may be erased. It takes
several days of driving under various
conditions to set the codes again.
To check if they are set, turn the
ignition switch to the ON (II)
position, without starting the engine.
The malfunction indicator lamp will
come on for 20 seconds. If it then
goes off, the readiness codes are set.
If it blinks five times, the readiness
codes are not set. If possible, do not
take your vehicle for an emissions
test until the readiness codes are set.
Refer to Emissions Testing for
more information (see page463).
Malfunction Indicator Lamp
437
T aking Care of t he Unexpect ed
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2009 MDX

U.S. Canada
The brake system
indicator normally
comes on when you turn the ignition
switch to the ON (II) position, and as
a reminder to check the parking
brake. It will stay on if you do not
fully release the parking brake.
If the brake system indicator comes
on while driving, the brake fluid level
is probably low. Press lightly on the
brake pedal to see if it feels normal. If
it does, check the brake fluid level
the next time you stop at a service
station (see page401).
You will also see a ‘‘LOW BRAKE
FLUID ’’message on the multi-
information display (see page81). If the fluid level is low, take your
vehicle to a dealer, and have the
brake system inspected for leaks or
worn brake pads.
However, if the brake pedal does not
feel normal, you should take
immediate action. A problem in one
part of the system's dual circuit
design will still give you braking at
two wheels. You will feel the brake
pedal go down much farther before
the vehicle begins to slow down, and
you will have to press harder on the
pedal.
You will also see a
‘‘CHECK BRAKE
SYSTEM ’’message on the multi-
information display (see page81). Slow down by shifting to a lower
gear, and pull to the side of the road
when it is safe. Because of the long
distance needed to stop, it is
hazardous to drive the vehicle. You
should have it towed, and repaired as
soon as possible (see
Emergency
Towing on page446).
If you must drive the vehicle a short
distance in this condition, drive
slowly and carefully.
If the ABS indicator and the VSA
system indicator come on with the
brake system indicator, have your
vehicle inspected by your dealer
immediately.
Brake System Indicator43808/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
2009 MDX

DimensionsLength 190.7 in (4,844 mm)
Width 78.5 in (1,995 mm)
Height 68.2 in (1,733 mm)
Wheelbase 108.3 in (2,750 mm)
Track Front 67.7 in (1,720 mm) Rear 67.5 in (1,715 mm)
Weights Gross vehicle weight rating See the tire information label attached to the driver's doorjamb.
Gross combined weight
ꭧ 1
rating (GCWR) 10,053 lbs (4,560 kg)
ꭧ 1: The GCWR must be reduced 2 percent for every 1,000 feet (305
meters) of elevation.
Air Conditioning Refrigerant type HFC-134a (R-134a)
Charge quantity 21.2－22.9 oz (600 －650 g)
Lubricant type ND-OIL 8
Seating Capacities Total 7
Front 2
Second 3
Third 2Capacities
Fuel tank Approx.
21.00 US gal (79.5 L)
Engine
coolant Change
ꭧ
1
1.93 US gal (7.3 L)
Total 2.43 US gal (9.2 L)
Engine oil Change
ꭧ 2
4.5 US qt (4.3 L)
Including
filter
Without
filter 4.2 US qt (4.0 L)
Total 5.3 US qt (5.0 L)
Automatic
transmission
fluid Change
3.0 US qt (2.8 L)
Total 8.3 US qt (7.9 L)
Rear
differential
fluid Change
2.6 US qt (2.5 L)
Total 2.9 US qt (2.7 L)
Transfer
assembly
fluid Change
0.4 US qt (0.4 L)
Total 0.4 US qt (0.4 L)
Windshield
washer
reservoir U.S. vehicles 4.2 US qt (4.0 L)
Canadian
vehicles
6.1 US qt (5.8 L)
ꭧ 1: Including the coolant in the reserve tank and that remaining in the
engine
Reserve tank capacity:
0.18 US gal (0.7 L)
ꭧ 2: Excluding the oil remaining in the engine
Specifications45208/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
2009 MDX

The burning of gasoline in your
vehicle's engine produces several
byproducts. Some of these are
carbon monoxide (CO), oxides of
nitrogen (NOx), and hydrocarbons
(HC). Gasoline evaporating from the
tank also produces hydrocarbons.
Controlling the production of NOx,
CO, and HC is important to the
environment. Under certain
conditions of sunlight and climate,
NOx and HC react to form
photochemical‘‘smog. ’’Carbon
monoxide does not contribute to
smog creation, but it is a poisonous
gas. The Clean Air Act
The United States Clean Air Act
ꭧ
sets standards for automobile
emissions. It also requires that
automobile manufacturers explain to
owners how their emissions controls
work and what to do to maintain
them. This section summarizes how
the emissions controls work.
Scheduled maintenance is on page
390.ꭧIn Canada, Acura vehicles comply
with the Canadian emission
requirements, as specified in an
agreement with Environment
Canada, at the time they are
manufactured. Crankcase Emissions Control
System
Your vehicle has a positive crankcase
ventilation system. This keeps
gasses that build up in the engine's
crankcase from going into the
atmosphere. The positive crankcase
ventilation valve routes them from
the crankcase back to the intake
manifold. They are then drawn into
the engine and burned.
Evaporative Emissions Control
System
As gasoline evaporates in the fuel
tank, an evaporative emissions
control canister filled with charcoal
adsorbs the vapor. It is stored in this
canister while the engine is off. After
the engine is started and warmed up,
the vapor is drawn into the engine
and burned during driving.
Emissions Controls46008/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
2009 MDX

Onboard Refueling Vapor
Recovery
The onboard refueling vapor
recovery (ORVR) system captures
the fuel vapors during refueling. The
vapors are adsorbed in a canister
filled with activated carbon. While
driving, the fuel vapors are drawn
into the engine and burned off.
Exhaust Emissions Controls
The exhaust emissions controls
include four systems: PGM-FI,
ignition timing control, exhaust gas
recirculation, and three way catalytic
converter. These four systems work
together to control the engine's
combustion and minimize the
amount of HC, CO, and NOx that
come out the tailpipe. The exhaust
emissions control systems are
separate from the crankcase and
evaporative emissions control
systems.
PGM-FI SystemThe PGM-FI system uses sequential
multiport fuel injection.It has three
subsystems: air intake, engine
control, and fuel control. The
powertrain control module (PCM)
uses various sensors to determine
how much air is going into the
engine. It then controls how much
fuel to inject under all operating
conditions.Ignition Timing Control SystemThis system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.Exhaust Gas Recirculation (EGR)SystemThe exhaust gas recirculation (EGR)
system takes some of the exhaust
gas and routes it back into the intake
manifold. Adding exhaust gas to the
air/fuel mixture reduces the amount
of NOx produced when the fuel is
burned.
Three Way Catalytic ConverterThe three way catalytic converter is
in the exhaust system. Through
chemical reactions, it converts HC,
CO, and NOx in the engine's exhaust
to carbon dioxide (CO
2), nitrogen
(N
2), and water vapor.
Replacement Parts
The emissions control systems are
designed and certified to work
together in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Acura replacement parts or their
equivalent for repairs. Using lower
quality parts may increase the
emissions from your vehicle.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more
information.
Emissions Controls
461
T echnical Inf ormat ion
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2009 MDX

A
Accessories andModifications
..........................
330
ACCESSORY (Ignition Key Position)
.................................
129
Accessory Power Sockets
..........
166
AC Power Outlet
........................
167
Active Damper System
...............
361
AcuraLink
®(U.S. models
only)
.......................................
307
Additives, Engine Oil
.................
394
Advanced Airbags
.................. ......
29
Airbag (SRS)
............................
9, 24
Air Conditioning System
............
170
Rear A/C Control
....................
175
Air Outlets (Vents)
.....................
177
Air Pressure, Tires
.....................
415
Alcohol in Gasoline
....................
322
Antifreeze
...................................
396
Anti-lock Brakes (ABS) Indicator Light
..................
66, 357
Operation
................................
357
Anti-theft, Audio System
.............
235 Anti-theft Steering Column
Lock
.......................................
129
Audio System
..............
180, 181,200
Auto Control Mode, Starting
Engine
....................................
339
Automatic Climate Control
.........
170
Automatic Lighting
....................
118
Automatic Seat Belt Tensioners
.................. .............
22
Automatic Speed Control
...........
270
Automatic Transmission
............
341
Capacity, Fluid
........................
452
Checking Fluid Level
..............
399
Shifting
...................................
341
Shift Lever Position Indicators
............................
341
Shift Lever Positions
...............
342
Shift Lock Release
...................
346
Auxiliary Input Jack
...................
232
B
Battery Charging System Indicator
........................
65, 436 Jump Starting
..........................
432
Maintenance
...........................
421
Specifications
..........................
453
Before Driving
...........................
321
Belts, Seat
................................
8, 20
Beverage Holders
......................
163
Booster Seats
...............................
55
Brakes Anti-lock Brakes (ABS)
...........
357
Break-in, New Linings
.............
322
Bulb Replacement
...................
406
Fluid
.......................................
401
Parking
...................................
153
System Indicator
...............
65, 438
Wear Indicators
.......................
357
Braking System
..........................
356
Break-in, New Vehicle
................
322
Brightness Control, Instruments
............................
123
CONTINUED
Index
I
INDEX
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2009 MDX