2005 Acura RL air condition

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The burning of gasoline in your
vehicle’s engine produces several by-
products. Some of these are carbon
monoxide (CO), oxides of nitrogen
(NOx), and hydrocarbons (HC).
Gasoline evaporating f rom the tank
also produces hydrocarbons. Con-
trolling the production of NOx, CO,
and HC is important to the environ-
ment. Under certain conditions of
sunlight and climate, NOx and HC
react to f orm photochemical ‘‘smog.’’
Carbon monoxide does not contri-
bute to smog creation, but it is a
poisonous gas.
In Canada, Acura vehicles comply
with the Canadian emission
requirements, as specif ied in an
agreement with Environment
Canada, at the time they are
manuf actured.
Your vehicle has a positive
crankcase ventilation system. This
keeps gasses that build up in the
engine’s crankcase f rom going into
the atmosphere. The positive crankcase ventilation valve routes
them from the crankcase back to the
intake manif old. They are then
drawn into the engine and burned.
As gasoline evaporates in the f uel
tank, an evaporative emissions
control canister f illed with charcoal
adsorbs the vapor. It is stored in this
canister while the engine is of f . Af ter
the engine is started and warmed up,
the vapor is drawn into the engine
and burned during driving.
The onboard ref ueling vapor
recovery (ORVR) system captures
the f uel vapors during ref ueling. The
vapors are adsorbed in a canister
f illed with activated carbon. While
driving, the f uel vapors are drawn
into the engine and burned of f .
The United States Clean Air Act
sets standards f or automobile
emissions. It also requires that
automobile manufacturers explain to
owners how their emissions controls
workandwhattodotomaintain
them. This section summarizes how
the emissions controls work.
Scheduled maintenance is on pages
and .300
299
Emissions Cont rols
The Clean Air Act
Crankcase Emissions Control
System Evaporative Emissions Control
System
Onboard Ref ueling Vapor
Recovery
T echnical Inf ormation
371

The exhaust emissions controls
include f our systems: PGM-FI,
ignition timing control, exhaust gas
recirculation, and three way catalytic
converter. These f our systems work
together to control the engine’s
combustion and minimize the
amount of HC, CO, and NOx that
comes out the tailpipe. The exhaust
emissions control systems are
separate f rom the crankcase and
evaporative emissions control
systems.
The PGM-FI system uses sequential
multiport f uel injection.
It has three subsystems: air intake,
engine control, and f uel control. The
powertrain control module (PCM)
uses various sensors to determine
how much air is going into the
engine. It then controls how much
f uel to inject under all operating
conditions.This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.
The exhaust gas recirculation (EGR)
system takes some of the exhaust
gas and routes it back into the intake
manif old. Adding exhaust gas to the
air/f uel mixture reduces the amount
of NOx produced when the f uel is
burned.
The emissions control systems are
designed and certif ied 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 f or repairs. Using lower
qualitypartsmayincreasethe
emissions f rom your vehicle.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual f or more informa-
tion.
The three way catalytic converters
are in the exhaust system. Through
chemical reactions, they convert HC,
CO, and NOx in the engine’s exhaust
to carbon dioxide (CO ), nitrogen
(N ), and water vapor.
2
2
Emissions Cont rols
Exhaust Emissions Controls Replacement Parts
PGM-FI Syst emIgnit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Three Way Catalytic Converter
372

....................................
Accessories .255
ACCESSORY (Ignition Switch .....................................
Position) .115
............
Accessory Power Sockets . 156
.....................................
Acura Link .208
Adaptive Front Lighting System ..........................................
(AFS) .107
....................
Additives, Engine Oil . 305
.............................
Airbag (SRS) .11, 25
............................
Air Conditioning .162
.........................................
Usage .163
.......................
Air Pressure, Tires .326
.......................
Alcohol in Gasoline .248
......................................
Antif reeze .308
Anti-lock Brakes (ABS) ...............................
Indicator .62, 275
...................................
Operation .275
..............
Anti-thef t, Audio System . 199
Anti-thef t Steering Column ............................................
Lock .115
.........................................
Ashtrays .157
................................
Audio System .171
Auto Control Mode, Starting ........................................
Engine .263 .......................
Automatic Lighting .105
...
Automatic Seat Belt Tensioners . 22
.............
Automatic Speed Control . 201
..............
Automatic Transmission . 265
..........................
Capacity, Fluid .366
...............
Checking Fluid Level . 310
.......................................
Shif ting .265
Shif t Lever Position ...............................
Indicators .265
................
Shif t Lever Positions . 265
....................
Shif t Lock Release . 270
Battery Charging System ...........................
Indicator .60, 348
............................
Jump Starting .343
..............................
Maintenance .331
..........................................
Cover .322
............................
Specif ications .367
..............................
Bef ore Driving .247
..................................
Belts, Seat .10, 21
.........................
Beverage Holders .154
..................................
Booster Seats .51 Brakes
Anti-lock Brake ........................
System (ABS) .275
.............
Break-in, New Linings . 248
...........................................
Fluid .311
.......................................
Parking .151
.................
System Indicator . 61,350
........................
Wear Indicators .274
.............................
Braking System .274
.................
Break-in, New Vehicle . 248
Brightness Control, ...............................
Instruments .109
......................
Brights, Headlights .104
Bulb Replacement ..........................
Back-up Lights .320
.......................
Front Fog Lights .318
...............
Front Position Lights . 317
........
Front Side Marker Lights . 317
.................................
Headlights .314
............................
Specif ications .367
............
Turn Signal Lights . 316,320
.....................................
Built-in-key .128
..............................
Bulbs, Halogen .314
Index
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B
INDEX
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