2011 Acura TL engine

Î
ÎThe 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.
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.
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 . 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.
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.
The Clean Air Act
Onboard Ref ueling
Vapor Recovery Evaporative Emissions
Control
Crankcase Emissions
Control
Emissions Cont rols
Technical Inf ormation
589
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System System
2011 TL

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
come out the tailpipe. The exhaust
emissions control systems are
separate from the crankcase and
evaporative emissions control
systems.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 for more
information.
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) in
automatic transmission vehicles or
the engine control module (ECM) in
manual transmission vehicles 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.
The 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 ), nitrogen
(N ), and water vapor. 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. This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.
2
2
Exhaust Emissions Controls Replacement Parts
PGM-FI System
Three Way Catalytic Converter
Exhaust Gas
Ignit ion T iming Cont rol Syst em
Emissions Cont rols
590
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Recirculation (EGR) System
2011 TL

Have your vehicle diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly. Keep the engine well maintained.
The three way catalytic converters
contain precious metals that serve as
catalysts, promoting chemical
reactions to convert the exhaust
gasses without af f ecting the metals.
The catalytic converters are ref erred
to as three-way catalysts, since they
act on HC, CO, and NOx.
Replacement units must be original
Acura parts or their equivalent.
The three way catalytic converters
must operate at a high temperature
for the chemical reactions to take
place. They can set on f ire any
combustible materials that come
near them. Park your vehicle away
f rom high grass, dry leaves, or other
f lammables.
Defectivethreewaycatalytic
converters contribute to air pollution,
and can impair your engine’s
perf ormance. Follow these
guidelines to protect your vehicle’s
three way catalytic converters.
Always use unleaded gasoline.
Even a small amount of leaded
gasoline can contaminate the
catalyst metals, making the three
way catalytic converters
inef f ective.
Three Way Catalytic Converters
Technical Inf ormation
591
THREE WAY CATALYTIC CONVERTER WARM UP THREE WAY CATALYTIC
CONVERTERS
10/07/29 12:57:53 31TK4620_596
2011 TL

Make sure the gas tank is nearly,
but not completely, f ull (around
3/4).Without touching the accelerator
pedal, start the engine, and let it
idle f or 20 seconds.
If you take your vehicle f or an
emissions test shortly af ter the
battery has been disconnected or
gone dead, it may not pass the test.
This is because of certain ‘‘readiness
codes’’ that must be set in the on-
board diagnostics f or the emissions
systems. These codes are erased
when the battery is disconnected,
and set again only after several days
of driving under a variety of
conditions. If the testing f acility determines that
the readiness codes are not set, you
will be requested to return at a later
date to complete the test. If you must
get the vehicle retested within the
next two or three days, you can
condition the vehicle f or retesting by
doing the f ollowing.
Make sure the vehicle has been
parked with the engine of f f or 6
hours or more.
Make sure the ambient
temperature is between 40° and
95°F (4° and 35°C). Keep the vehicle in Park
(automatic) or neutral (manual).
Increase the engine speed to 2,000
rpm,andholditthereuntilthe
temperature gauge rises to at least
1/4of thescale(about3minutes).
Without touching the accelerator
pedal, let the engine idle f or 20
seconds.
1.
2.
3. 4.
5.
6.
T esting of Readiness Codes
Emissions T esting
592
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2011 TL

Then drive in city/suburban
traffic for at least 10 minutes.
When traf f ic conditions allow, let
the vehicle coast f or several
seconds without using the
accelerator pedal or the brake
pedal.
If the testing f acility determines the
readiness codes are still not set, see
your dealer. Make sure the vehicle has been
parked with the engine of f f or 30
minutes.
Select a nearby lightly traveled
major highway where you can
maintain a speed of 50 to 60 mph
(80to97km/h)foratleast20
minutes. Drive on the highway in
D (automatic) or 5th (manual). Do
notusethecruisecontrol.When
traffic allows, drive for 90 seconds
without moving the accelerator
pedal. (Vehicle speed may vary
slightly; this is okay.) If you cannot
do this f or a continuous 90
seconds because of traf f ic
conditions, drive f or at least 30
seconds, then repeat it two more
times (for a total of 90 seconds).
7.
8.
9.
Emissions T esting
Technical Inf ormation
593
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2011 TL

T he publications shown below can be purchased f rom Helm
Incorporated. You can order by phone or online:Call Helm Inc. at 1-800-782-4356 (credit card orders only)
Go online at
If you are interested in other years or models, contact Helm Inc.
at 1-800-782-4356.
Covers maintenance and recommended procedures f or
repair to engine and chassis components. It is written
f or the journeyman mechanic, but it is simple enough
f or most mechanically inclined owners to understand.
Complements the Service Manual by providing in-depth
troubleshooting inf ormation f or each electrical circuit
in your vehicle.
Describes the procedures involved in the replacement
of damaged body parts.
Authorized Manuals
Purchasing Factory Authorized Manuals
(U.S. only) Service Manual:
Electrical T roubleshooting Manual:
Body Repair Manual:
Authorized Manuals
599
Form Description
2009-2011 Acura TL Service Manual 2009-2011 Acura TL
Electrical Troubleshooting Manual
2009 Model Series Acura TL Body Repair Manual 2011 Acura TL Owner’s Manual
2011 Acura TL Navigation Manual
2011 Acura TL Maintenance Journal
2011 Acura TL Advanced Technology Guide Order Form for Previous Years-
Indicate Year and Model Desired
Publication
Form Number 61TK402
61TK402EL
61TK430
31TK4620
31TK4820
31TK4M20 31TK4Q20 ACU-R
www.helminc.com
10/07/29 12:58:39 31TK4620_604
2011 TL

CONT INUED
................................
AAC .261, 301,348
....................................
Accessories .453
ACCESSORY (Ignition Key .....................................
Position) .145
ACCESSORY Mode ...........................
(Power Mode) .178
............
Accessory Power Sockets . 207
................
Active Head Restraints . 159
....................................
AcuraLink
. 425
....................
Additives, Engine Oil . 510
...........................
Advanced Airbags .28
...............................
Airbag (SRS) .9, 24
..........
Airbag System Components . 24
......
Air Conditioning System . 216,217
.........................................
Usage .218
...............
Air Pressure, Tires . 535,536
......................................
Antif reeze .512
Anti-lock Brakes (ABS) ...............................
Indicator .66, 482
...................................
Operation .482
..............
Anti-thef t, Audio System . 373
Anti-thef t Steering Column ....................................
Lock .145, 183
................................
Audio System .225 .
Automatic Lighting Off Feature . 135
...
Automatic Seat Belt Tensioners . 22
.............
Automatic Speed Control . 383
..............
Automatic Transmission . 468
..........................
Capacity, Fluid .580
...............
Checking Fluid Level . 515
..........................
Paddle Shif ters .473
.......................................
Shif ting .469
Shif t Lever Position ...............................
Indicators .468
....................
Shif t Lock Release . 471
......................
Auxiliary Input Jack .372
Battery Charging System ...........................
Indicator .65, 561
............................
Jump Starting .557
..............................
Maintenance .542
............................
Specif ications .581
..............................
Bef ore Driving .443
....................................
Belts,Seat .8,20
.........................
Beverage Holders .206
...................
Audio . 269,359
...............
HandsFreeLink. 389, 406
..................................
Booster Seats .54
Brakes ...........
Anti-lock System (ABS) . 482
.............
Break-in, New Linings . 444
...........................................
Fluid .519
.......................................
Parking .204
.................
System Indicator . 65,563
........................
Wear Indicators .481
.............................
Braking System .481
.................
Break-in, New Vehicle . 444
Brightness Control, ...............................
Instruments .137
....................................
Built-In Key .195
Bulb Replacement ..........................
Back-up Lights .528
.........
Daytime Running Lights . 521
.................................
Fog Lights .526
.................................
Headlights .521
............................
Specif ications .581
............
Turn Signal Lights . 524,528
......................
Bulbs, Halogen .521, 526
Bluetooth Bluetooth
Index
A
B
INDEX
I
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2011 TL

...............
DANGER, Explanation of . iii
...................................
Dashboard .3, 62
..............
Daytime Running Lights . 136
.................................
Dead Battery .557
............
Def ects, Reporting Saf ety . 598
..............
Def ogger, Rear Window . 139
..............
Def rosting the Windows . 221
....................................
Dimensions .580
.............
Dimming the Headlights . 133
Dipstick ..........
Automatic Transmission . 515
..................................
Engine Oil .448
........................
Directional Signals .133
........
Disc Brake Wear Indicators . 481
.................................
Disc Changer .241
...
Disc Changer Error Messages . 251
.....................
Disposal of Used Oil .512
............................
Capacities Chart .580
.............
Carbon Monoxide Hazard . 57
............................
Carrying, Cargo .455
.............
CAUTION, Explanation of . iii
.........................................
CD Care .364
...................................
CD Changer .241
.......................................
CD Player .295
........................
Certif ication Label .578
............................................
Chains .541
....................
Changing a Flat Tire .549
Changing Oil ........................................
How to .510
......................................
When to .497
...
Charging System Indicator . 65,561
............
Checklist, Bef ore Driving . 460
.....................................
Child Saf ety .37
..............................
Booster Seats .54
...................................
Child Seats .45
..........................................
Inf ants .42
............................
Large Children .53
.........................................
LATCH .47
......................
Risks with Airbags .38
.............................
Small Children .43
.........................................
Tethers .51 .....................
Warning Labels .39, 59
.........
Where Should a Child Sit? . 38
.......................................
Child Seats .45
.........................................
LATCH .47
..........
Tether Anchorage Points . 51
................
Childproof Door Locks . 147
................
Cleaning the Seat Belts . 530
..........
Client Service Inf ormation . 596
.......
Climate Control System . 216,217
..........................
On/Off Button .219
..............................................
Clock .374
...................................
Clutch Fluid .520
..................
CO in the Exhaust . 57, 589
....
Cold Weather, Starting in . 461,463
......................
Compact Spare Tire .548
.........................................
Compass .379
.................
Console Compartment . 208
.................
Consumer Inf ormation . 596
.............
Controls, Instruments and . 61
Coolant ........................................
Adding .512
....................................
Checking .449
.........................
Proper Solution .512
...................
Temperature Gauge . 76
........
Water Temp Hot Message . 76Crankcase Emissions Control
........................................
System .589
................
Cruise Control Indicator . 72
............
Cruise Control Operation . 383
...................................
Cup Holders .206
.............
Customer Service Of f ice . 596
Index
D
C
II
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2011 TL