cooling Acura RL 2004 3.5 Owner's Manual

This indicator displays the outside
temperature in Fahrenheit in U.S.
models, and in Centigrade in
Canadian models.
In certain weather conditions,
temperature readings near f reezing
(32°F, 0°C) could mean that ice is
f orming on the road surf ace. The temperature sensor is located in
the f ront bumper. Theref ore, the
temperature reading can be af f ected
by heat ref lection f rom the road sur-
f ace, engine heat, and the exhaust
f rom the surrounding traf f ic. This
can cause the temperature reading
not to be correct when your speed is
under 19 mph (30 km/h).This shows how much f uel you have.
It is most accurate when the vehicle
is on level ground. It may show
slightly more or less than the actual
amount when you are driving on
curvy or hilly roads.
This shows the temperature of the
engine’s coolant. During normal
operation, the pointer should rise
from the bottom white mark to about
the middle of the gauge. In severe
driving conditions, such as very hot
weather or a long period of uphill
driving, the pointer may rise to near
the upper red mark. If it reaches the
red (Hot) mark, pull saf ely to the
side of the road. Turn to page f or
instructions and precautions on
checking the engine’s cooling
system. The needle returns to the bottom
after you turn off the ignition. The
gauge shows the f uel level reading
immediately af ter you turn the
ignition switch back ON (II).
319 Fuel Gauge
Temperature Gauge
Outside Temperature Indicator
Gauges
Inst rument s and Cont rols65
Avoid driving with an extremely low
f uel level. Running out of f uel could
cause the engine to misf ire, damaging
the catalytic converter.

The automatic climate control
system in your Acura picks the
proper combination of air condi-
tioning, heating, and ventilation to
maintain the interior temperature
you select. The system also adjusts
the fan speed and air flow levels.
The direction of air f low f rom the
vents in the center and each side of
the dashboard is adjustable. Move
the tab in the center of each vent up-
and-down and side-to-side.
Thesideventscanbeopenedand
closed with the dials next to them.The climate control system draws air
through the exterior vents at the
bottom of the windshield. Keep
these vents clear of leaves and other
debris.For the climate control system to
provide heating and cooling, the
engine must be running.
In the rear seat, you can also adjust
the ventilation when the climate con-
trol system is on (see page ). 132
Comf ort and Convenience Feat ures
Climat e Cont rol Syst em
120
SIDE VENTS
CENTER VENTS
Open
Close

When you set the temperature to its
lower limit (60°F/18°C) or its upper
limit (90°F/32°C), the system runs
at f ull cooling or heating only. It does
not regulate the interior temperature.
When the temperature is setbetween the lower and upper limits,
the system regulates the interior
temperature to the set value.
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. To put the Automatic Climate
Control in f ully-automatic mode,
press the AUTO button and set the
f an control dial to AUTO, then set
the desired temperature by turning
the temperature control dial. You will
see FULL AUTO in the system’s
display. The light above either the
or button also goes
on to show you which is selected.
In cold weather, the f an will not
come on automatically until the
vehicle has been driven f or a short
time and the heater starts to develop
warm air.Pressing the OFF button shuts the
climate control system of f . Keep the
system of f only f or short periods. To
keep stale air and mustiness from
collecting, you should have the f an
running at all times.
Climat e Cont rol Syst em
Comf ort and Convenience Feat ures
Fully-automatic Operation
3.5 RL wit hout Navigat ion Syst em
122
TEMPERATURE
CONTROL DIAL
FULL AUTO
DISPLAY FAN CONTROL
DIAL
AUTO
BUTTON OFF
BUTTON

CONT INUED
You can manually select various
f unctions of the Climate Control
system when it is in FULL AUTO.
All other f eatures remain auto-
matically controlled. Making any
manual selection causes the word
FULL to go out.
When you turn the A/C of f , the sys-
tem cannot regulate the inside tem-
perature if you set the dial below the
outside temperature. With the A/C
on, use the temperature control dial
to adjust the temperature of the air
flow to a comfortable setting.With the A/C in economy mode, you
will see A/C ECON in the system’s
display. Use this mode to get better
f uel economy.
Press the A/C button to operate the
air conditioning. Each time you press
the A/C button, the display shows
the mode: A/C ECON, A/C OFF, or
A/C ON.
In this mode, you may f eel a slight re-
duction in cooling ef f iciency. If you
want more cooling, select A/C ON or
FULL AUTO.
Climat e Cont rol Syst em
Comf ort and Convenience Feat ures
Semi-automatic Operation
A ir Condit ioning (A /C) But t on
123
RECIRCULATED AIR FRESH AIRAIR CONDITIONING
BUTTON
TEMPERATURE
CONTROL DIAL

Û
Ý
To put the Automatic Climate
Control in f ully-automatic mode,
press the AUTO button. Then set
the desired temperature by pressing
either side of the TEMP button:
to raise the temperature above the
displayed value, or to lower the
temperature.
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.
When you set the temperature to its
lower limit (57°F/14°C ‘‘ ’’)
or its upper limit (87°F/31°C
‘‘ ’’), the system runs at f ull
cooling or heating only. It does not
regulate the interior temperature.
When the temperature is set
between the lower and upper limits, the system regulates the interior
temperature to the set value.
In cold weather, the f an will not
come on automatically until the
vehicle has been driven f or a short
time and the heater starts to develop
warm air.
Pressing the OFF button shuts the
climate control system of f . Keep the
system of f only f or short periods. To
keep stale air and mustiness from
collecting, you should have the f an
running at all times. The f an is controlled until the heater
gets warm.
Climat e Cont rol Syst em
Comf ort and Convenience Feat ures
Fully-automatic Operation
U.S. 3.5 RL wit h Navigat ion Syst em
127
TEMPERATURE DISPLAY
RECIRCULATION BUTTON
OFF BUTTON
AUTO BUTTON
TEMPERATURE BUTTON

When you turn the A/C of f , the
system cannot regulate the inside
temperature if you set it below the
outside temperature. With the A/C
on, use the temperature buttons to
adjust the temperature of the air
flow to a comfortable setting.
With the A/C in economy mode, you
will see A/C ECON in the display.
Usethismodetogetbetterfuel
economy.
In this mode, you may f eel a slight re-
duction in cooling ef f iciency. If you
want more cooling, select A/C ON or
FULL AUTO.This button controls the source of
the air going into the system. When
the indicator above this button is lit,
air f rom the vehicle’s interior is sent
through the system again (Recircula-
tion mode). When the indicator is off,
air is brought in f rom outside the
vehicle (Fresh Air mode).
You can, f or example, manually put
the system in recirculation mode
when driving through an area of
smoke or f umes.
You can manually select the f an
speed with the f an speed icon.
Touching the icon repeatedly makes
the fan run faster. The fan speed is
shownbybarsinthedisplay.If the
f an is at its highest speed, touching
the icon again takes it to its lowest
speed.
To remove f og f rom the inside of the
windows (on very cold days), you
select , the A/C turns on
automatically and the system selects
Fresh Air mode.
CONT INUED
Climat e Cont rol Syst em
Comf ort and Convenience Feat ures
Recirculat ion But t on Fan Speed Icon
129

When preparing to tow, and bef ore
driving away, be sure to check the
f ollowing:All weights and loads are within
limits (see pages and ).
Thehitch,safetychains,andany
other attachments are secure.
Allitemsonandinthetrailerare
properly secured and cannot shif t
while you drive.
Many states and Canadian provinces
require special outside mirrors when
towing a trailer. Even if they don’t,
you should install special mirrors if
you cannot clearly see behind you, or
if the trailer creates a blind spot.
Askyourtrailersalesorrental
agency if any other items are
recommended or required f or your
towing situation.
The lights and brakes on your car
and the trailer are working
properly.Your car tires and spare are
properly inf lated (see page ),
and the trailer tires and spare are
inflated as recommended by the
trailer maker.
The vehicle has been properly
serviced, and the tires, brakes,
suspension, and cooling system
are in good operating condition.
232 233 280
Towing a Trailer
Driving
Pre-T ow ChecklistAdditional Trailer Equipment
236

If you have the skills and tools to per-
f orm more complex maintenance
tasks on your Acura, you may want
to purchase the Service Manual. See
page f or inf ormation on how to
obtain a copy, or see your Acura
dealer. This section also includes
Maintenance Schedules f or normal
driving and severe driving conditions,
a Maintenance Record, and instruc-
tions f or simple maintenance tasks
you may want to take care of
yourself . This section explains why it is
important to keep your car well
maintained and how to f ollow basic
maintenance saf ety precautions.......................
Maintenance Saf ety .240
.
Important Safety Precautions . 241
.................
Maintenance Schedule . 242
...
Required Maintenance Record . 249
.......
Owner Maintenance Checks . 251
..............................
Fluid Locations .252
......................................
Engine Oil .253
..................................
Adding Oil .253
....................
Recommended Oil .253
..............................
Synthetic Oil .254
....................................
Additives .254
.....
Changing the Oil and Filter . 255
.............................
Cooling System .257
............
Adding Engine Coolant . 257
.......
Replacing Engine Coolant . 259
....................
Windshield Washers .263
....
Automatic Transmission Fluid . 264
..............................
Dif f erential Oil .265
....................................
Brake Fluid .266
............................
Brake System .266
..............................
Power Steering .266
....................................
Hood Latch .267
.....................
Air Cleaner Element .267
....................................
Spark Plugs .269
..............................
Replacement .269
............................
Specif ications .272 ...........................................
Battery .272
.................................
Wiper Blades .275
..............
Air Conditioning System . 277
..................
Dust and Pollen Filter . 278
.....................................
Drive Belts .278
....................................
Timing Belt .279
...............................................
Tires .279
......................................
Inf lation .279
..................................
Inspection .281
..............................
Maintenance .282
.............................
Tire Rotation .282
...
Replacing Tires and Wheels . 283
......................
Wheels and Tires .284
..........................
Winter Driving .284
.............................
Snow Tires .285
............................
Tire Chains .285
.............................................
Lights .286
........................
Replacing Bulbs .288
...........................
Storing Your Car .297
355
Maintenance
Maint enance239

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.
The coolant you add should always
be a mixture of 50 percent antif reeze
and 50 percent water. Never add
straight antif reeze or plain water.If the reserve tank is completely
empty, you should also check the
coolant level in the radiator.
Make sure the engine and radiator
are cool.
Always use Honda All Season
Antif reeze/Coolant Type 2. This
coolant is pre-mixed with 50 percent
antif reeze and 50 percent water. It
does not require any additional
mixing.
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.
However, 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.
1.
A dding Engine Coolant
Cooling Syst em
Maint enance256
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.

The coolant level should be up to
the base of the f iller neck. Add
coolant if it is low.
Remove the radiator cap by
pushing down and turning
counterclockwise. Turn the radiator cap counter-
clockwise, without pressing down
on it, until it stops. This relieves
any pressure remaining in the
cooling system. Put the radiator cap back on.
Tighten it f ully.
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 car’s cooling
system. They may not be compatible
with the coolant or engine compo-
nents.
Pour the coolant slowly and caref ully
so you do not spill. Clean up any
spills immediately. Spilled coolant
could damage components in the
engine compartment.
2.
3.
4.5.
6.
CONT INUED
Cooling Syst em
Maint enance257
RADIATOR CAP
RESERVE TANK