2004 Acura MDX cooling

Your vehicle’s exhaust contains
carbon monoxide gas. You should
have no problem with carbon
monoxide entering the vehicle in
normal driving if you maintain your
vehicle properly.
Have the exhaust system inspected
f or leaks whenever:The vehicle is raised f or an oil
change.
You notice a change in the sound
of the exhaust.
The vehicle was in an accident
that may have damaged the under-
side. High levels of carbon monoxide can
collect rapidly in enclosed areas,
such as a garage. Do not run the
engine with the garage door closed.
Even with the door open, run the
engine only long enough to move the
vehicle out of the garage. With the tailgate open, air flow can
pull exhaust gas into your vehicle’s
interior and create a hazardous
condition. If you must drive with the
tailgate open, open all the windows
and set the heating and cooling
system/climate control system as
shown below.
If you must sit in your parked vehicle,
even in an unconf ined area, with the
engine running, adjust the heating
and cooling system/climate control
system as f ollows:
Select the Fresh Air mode.
Select the mode.
Turn the f an on high speed.
Set the temperature control to a
comfortable setting.
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Carbon Monoxide Hazard
Driver and Passenger Saf ety51
Carbon monoxide gas is toxic.
Breathing it can cause
unconsciousness and even kill
you.
Avoid any enclosed areas or
activities that expose you to
carbon monoxide.

This meter shows the number of
miles (U.S.) or kilometers (Canada)
driven since you last reset it.This shows the temperature of the
engine’s coolant. During normal
operation, the pointer should rise to
about the middle of the gauge. In
severe driving conditions, the pointer
mayrisetotheupperwhitemark.If
it reaches the red (Hot) mark, pull
safely to the side of the road. Turn to
page f or instructions and
precautions on checking the engine’s
cooling system.
To reset a trip meter, display it, and
then press and hold the Reset button
until the number resets to ‘‘0.0’’.
Both trip meters will reset if the
vehicle’s battery goes dead or is
disconnected. There are two trip meters: Trip A
and Trip B. Switch between these
displays by pressing the Select
button repeatedly. Each trip meter
works independently, so you can
keep track of two dif f erent distances.
When you turn the ignition switch
ON (II), what you last selected is
displayed.
240
Gauges
Inst rument s and Cont rols
Trip Meter Temperature Gauge
67
SELECT BUTTON
RESET BUTTON

ÚÜ
Û
Ý
Push the button to increase the
temperature of air f low. Push the
button to decrease it. When you set
the temperature to its lower limit or
its upper limit, the system runs at f ull
cooling or heating only. It does not
regulate the interior temperature.
This button or icon turns the air
conditioningonandoff.Youwillsee
A/C ON or A/C OFF in the display. The outside air intakes f or the
heating and cooling system are at
the base of the windshield. Keep this
area clear of leaves and other debris.
ThesystemshouldbeleftinFresh
Air mode under almost all conditions.
Keeping the system in Recirculation
mode, particularly with the A/C of f ,
can cause the windows to fog up.
Switch to Recirculation mode when
driving through dusty or smoky
conditions, then return to Fresh Air
mode.
This button turns the rear window
def ogger on and of f (see page ). When the indicator in the button is
on, air f rom the vehicle’s interior is
recirculated throughout the system.
When the indicator is off, air is
brought in f rom the outside of the
vehicle (Fresh Air mode).
Push the button or icon to
increase the f an speed and air f low.
Push the button or icon to
decrease it.
Use the mode control button or icon
to select the vents the air flows from.
Air flows from the center
and corner vents in the dashboard.
Airf low is divided between
the vents in the dashboard and the
f loor vents.
Air f lows f rom the f loor
vents.
Airf low is divided between
the f loor vents and the def roster
vents at the base of the windshield.
Air f lows f rom the def roster
vents at the base of the windshield.
When you select , the system
automatically switches to Fresh Air
mode and turns on the A/C.
75
Comf ort and Convenience Feat ures
Fan Control Button/Icon
Temperature Control Buttons
Air Conditioning (A/C) Button/
Icon Recirculation Button
Rear Window Def ogger Button Mode Control Button/Icon
Airf low Buttons
105

The Automatic Climate Control
system can adjust the f an speed and
airflow levels to maintain the interior
temperature you select.Press the AUTO button.
Set the desired temperature with
the temperature control buttons.
You will see FULL AUTO in the
system’s display.
The system automatically selects the
proper mix of conditioned and/or
heated air that will, as quickly as
possible, raise or lower the interior
temperature f rom its current level to
the set temperature. In FULL AUTO
the rear A/C control panel cannot be
used. In cold weather, the f an will not
come on automatically until the
heater starts to develop warm air.
You can manually select various
f unctions of the Climate Control
system when it is in FULL AUTO.
All other f eatures remain
automatically controlled.
Manually selecting a f unction causes
thewordFULLinthedisplaytogo
out.
Press the OFF button. However, a
lack of air f low can cause the
windows to fog up. It is
recommended that you keep the f an
on at all times so stale air and
moisture do not build up in the
interior and cause fogging.
If you set the temperature to its
lower or its upper limit, the system
runs at f ull cooling or heating only. It
does not regulate the interior
temperature.
Select . The system
automatically switches to Fresh
Air mode and turns on the A/C.
The A/C indicator will not come
on in U.S. vehicles.
Select .
Set the f an and temperature
controls to maximum level.
To clear the windows f aster, you can
close the dashboard corner vents by
rotating the wheel below each vent.
This sends more warm air to the
windshield def roster vents. Once the
windshield is clear, select Fresh Air
mode to avoid f ogging the windows.
For your saf ety, make sure you have
a clear view through all the windows
bef ore driving. 1.
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3.
Comf ort and Convenience Feat ures
Vents, Heating, and A/C
T o Remove Exterior Frost or Ice
From the Windows
Manual Operation
To Turn Everything Of f
Using A utomatic Climate Control
108

If the coolant level in the reserve
tank is at or below the MIN line, add
coolant to bring it up to the MAX line.
Inspect the cooling system f or leaks.Always use Honda All Season
Antif reeze/Coolant Type 2. This
coolant is pre-mixed with 50 percent
antif reeze and 50 percent water.
Never add straight antifreeze or
plain water.
If it is not available, you may use
another major-brand non-silicate
coolant as a temporary replacement.
Make sure it is a high-quality coolant
recommended f or aluminum engines.
Continued use of any non-Honda
coolant can result in corrosion,
causing the cooling system to
malf unction or f ail. Have the cooling
system f lushed and ref illed with
Honda antif reeze/coolant as soon as
possible.If the reserve tank is completely
empty, you should also check the
coolant level in the radiator.
Engine Coolant
Maint enance
A dding Engine Coolant
208
RESERVE TANK
Removing the radiator cap
while the engine is hot can
cause the coolant to spray out,
seriously scalding you.
Always let the engine and
radiator cool down before
removing the radiator cap.

Make sure the engine and radiator
are cool.
When the radiator and engine are
cool, relieve any pressure in the
cooling system by turning the
radiator cap counterclockwise,
without pressing down.
Remove the radiator cap by
pushing down and turning
counterclockwise.The coolant level should be up to
the base of the f iller neck. Add
coolant if it is low.
Pourthecoolantslowlyand
caref ully so you do not spill. Clean
up any spill immediately; it could
damage components in the engine
compartment.
Put the radiator cap back on, and
tighten it fully.
Pour coolant into the reserve tank.
Fill it to half way between the MAX
and MIN marks. Put the cap back
on the reserve tank.
Do not add any rust inhibitors or
other additives to your vehicle’s
cooling system. They may not be
compatible with the coolant or
engine components. Check the f luid level in the
windshield washer reservoir at least
monthly during normal use.
The low washer level indicator will
come on when the level is low (see
page ).
Fill the reservoir with a good-quality
windshield washer f luid. This
increases the cleaning capability and
prevents f reezing in cold weather.
When you ref ill the reservoir, clean
the edges of the windshield wiper
blades with windshield washer f luid
on a clean cloth. This will help to
condition them.
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2. 61
Engine Coolant, Windshield Washers
Maint enance
Windshield Washers
209
NOTICE:
Do not use engine antif reeze
or a vinegar/water solution in the
windshield washer reservoir. Antif reeze
can damage your vehicle’s paint, while
a vinegar/water solution can damage
the windshield washer pump. Use only
commercially-available windshield
washer f luid.

If you need to park your vehicle f or
an extended period (more than one
month), there are several things you
should do to prepare it f or storage.
Proper preparation helps prevent
deterioration and makes it easier to
get your vehicle back on the road. If
possible, store your vehicle indoors.Fill the f uel tank.
Change the engine oil and f ilter.
Wash and dry the exterior
completely.
Cleantheinterior.Makesurethe
carpeting, floor mats, etc., are
completely dry.
Leave the parking brake off. Put
the transmission in Park. Block the rear wheels.
If the vehicle is to be stored f or a
longer period, it should be
supported on jackstands so the
tires are of f the ground.
Leave one window open slightly (if
the vehicle is being stored
indoors).
Disconnect the battery.
Support the f ront and rear wiper
blade arms with a f olded towel or
ragsotheydonottouchthe
windshield.
To minimize sticking, apply a
silicone spray lubricant to all door
and tailgate seals. Also, apply a
vehiclebodywaxtothepainted
surfaces that mate with the door
and tailgate seals.Cover the vehicle with a
‘‘breathable’’ cover, one made
f rom a porous material such as
cotton. Non-porous materials, such
as plastic sheeting, trap moisture,
which can damage the paint.
If possible, periodically run the
engine until it reaches f ull
operating temperature (the
cooling f ans cycle on and of f
twice). Pref erably, do this once a
month.
If you store your vehicle f or 12
months or longer, have your Acura
dealer perf orm the inspections called
f or in the 24 months/30,000 miles
(48,000 km) maintenance schedule
(Normal Conditions) as soon as you
take it out of storage (see page ).
The replacements called f or in the
maintenance schedule are not
needed unless the vehicle has
actually reached that time or mileage. 199
Vehicle Storage
Maint enance227

If the temperature gauge stays at
the red mark, turn of f the engine.
Look f or any obvious coolant leaks,
such as a split radiator hose.
Everything is still extremely hot,
so use caution. If you f ind a leak, it
must be repaired bef ore you
continue driving (seeon page ). Start the engine and set the
temperature control dial to
maximum (climate control to
FULL AUTO at 90°F/32°C). Add
coolant to the radiator up to the
base of the f iller neck. If you do
not have the proper coolant
mixture available, you can add
plain water. Remember to have
the cooling system drained and
ref illed with the proper mixture as
soon as you can.
Put the radiator cap back on
tightly. Run the engine, and watch
the temperature gauge. If it goes
back to the red mark, the engine
needs repair (see
on page ).
If the temperature stays normal,
check the coolant level in the
radiator reserve tank. If it has
gone down, add coolant to the
MAX mark. Put the cap back on
tightly.
If you don’t f ind an obvious leak,
check the coolant level in the
radiator reserve tank. Add coolant
if the level is below the MIN mark.
If there was no coolant in the
reserve tank, you may need to add
coolant to the radiator. Let the
engine cool down until the pointer
reaches the middle of the tempera-
ture gauge, or lower, bef ore check-
ing the radiator.
Using gloves or large heavy cloth,
turn the radiator cap
counterclockwise, without pushing
down, to the f irst stop. Af ter the
pressure releases, push down on
the cap, and turn it until it comes
off.
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244 244
If Your Engine Overheats
T aking Care of t he Unexpect ed
Emergency
Towing
Emergency
Towing
241
Removing the radiator cap
while the engine is hot can
cause the coolant to spray out,
seriously scalding you.
Always let the engine and
radiator cool down before
removing the radiator cap.