2001 Acura TL engine

The exhaust emissions controls
include f our 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
comes out the tailpipe. The exhaust
emissions control systems are
separate f rom the crankcase and
evaporative emissions control
systems.The emissions control systems are
covered by warranties separate from
the rest of your car. Read your
warranty manual for more inf orma-
tion.
The PGM-FI System uses sequential
multiport f uel 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 f uel to inject under all operat-
ing 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 to-
gether in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Genuine Honda replacement parts or
their equivalent f or repairs. Using
lower quality parts may increase the
emissions f rom your car.
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 ), dinitrogen
(N ), and water vapor.
2
2
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
Emissions Cont rols
T echnical Inf ormation295

Keep the engine tuned-up.
Always use unleaded gasoline.
Even a small amount of leaded
gasoline can contaminate the
catalyst metals, making the three
way catalytic converter inef f ective.
The three way catalytic converter
contains platinum, palladium and
rhodium. These metals serve as
catalysts, promoting chemical
reactions to convert the exhaust
gasses without af f ecting the metals.
The catalytic converter is ref erred to
as a three-way catalyst, since it acts
on HC, CO, and NOx. A replacement
unit must be an original Acura part
or its equivalent.
The three way catalytic converter
must operate at a high temperature
for the chemical reactions to take
place. It can set on f ire any com-
bustible materials that come near it.
Park your car away f rom high grass,
dry leaves, or other f lammables.
A defective three way catalytic
converter contributes to air pollution,
and can impair your engine’s per-
f ormance. Follow these guidelines to
protect your car’s three way catalytic
converter. Have your car diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly.
Three Way Catalytic Converter
T echnical Inf ormation296
T T
H
H R
REEE
E W
WA AY
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CAA T
TA
A L
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ICC C
COON NVVE
ER
RT TE
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R

CONT INUED
If you take your vehicle f or a state
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 re-tested within the
next two or three days, you can
condition the vehicle for re-testing
by doing the f ollowing.
Make sure the gas tank is nearly,
but not completely, f ull (around
3/4).
Make sure the vehicle has been
parked with the engine of f f or 8
hours or more.
Make sure the ambient
temperature is between 20° and
95°F. Without touching the accelerator
pedal, start the engine and let it
idle f or 20 seconds.
Keep the vehicle in Park .
Increase the engine speed to 2,000
rpm and hold it there until the
temperature gauge rises to at least
1/4of thescale(approximately3
minutes).
T echnical Inf ormation
St at e Emissions T est ing
T esting of Readiness Codes
297

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#
) This manual complements the Service Manual by
providing in-depth troubleshooting inf ormation f or each
electrical circuit in your vehicle.
This manual describes the procedures involved in the
replacement of damaged body parts. This manual covers maintenance and recommended
procedures f or repair to engine and chassis components.
It is written f or the Journeyman mechanic, but is simple
enough f or most mechanically-inclined owners to under-
stand.
Authorized Manuals
Service Manual:
Electrical T roubleshooting Manual:
Body Repair Manual:
306
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CONT INUED
...
Accessories and Modif ications . 157
................................
Accessories .157
.
Additional Safety Precautions . 158
............................
Modif ications .158
ACCESSORY (Ignition Key .......................................
Position) .79
............
Accessory Power Sockets . 109
....................
Additives, Engine Oil . 207
...............................
Airbag (SRS) .9, 45
.....................
Air Cleaner Element .220
.................
Air Conditioning Filter . 230
......
Air Conditioning System . 114,121
..............................
Maintenance .229
.................................
Usage .116, 121
.......................
Air Pressure, Tires .232
.......................
Alcohol in Gasoline .292
......................................
Antif reeze .210
Anti-lock Brakes (ABS) ...............................
Indicator .57, 178
...................................
Operation .177
..............
Anti-thef t, Audio System . 146
.
Anti-thef t Steering Column Lock . 78
..........................
Appearance Care .249
................................
Audio System .127 ...
Automatic Lighting Off Feature . 66
...............
Automatic Speed Control . 72
..............
Automatic Transmission . 166
..........................
Capacity,Fluid .288
...............
Checking Fluid Level . 216
.......................................
Shif ting .166
.
Shif t Lever Position Indicator . 166
................
Shif t Lever Positions . 167
....................
Shif t Lock Release . 173
Battery Charging System ...........................
Indicator .56, 272
............................
Jump Starting .266
..............................
Maintenance .224
............................
Specif ications .289
..............................
Bef ore Driving .149
....................................
Belts,Seat .8,42
...........................
Beverage Holder .107
...................................
Body Repair .256
Brakes ...........
Anti-lock System (ABS) . 177
.............
Break-in, New Linings . 150
....................
Bulb Replacement .243 ...........................................
Fluid .218
.......................................
Parking .103
.................
System Indicator . 56,275
........................
Wear Indicators .176
.............................
Braking System .176
........................
Break-in, New Car .150
..
Brightness Control, Instruments . 67
........................
Brights, Headlights .65
Bulb Replacement ..........................
Back-up Lights .243
..............................
Brake Lights .243
..............................
Ceiling Light .245
........................
Courtesy Lights .245
........
Front Side Marker Lights . 241
.................................
Headlights .240
.........
High-mount Brake Light . 244
...................
License Plate Light . 244
............................
Specif ications .289
...................................
Spotlights .245
....................
Turn Signal Lights . 241
..............................
Bulbs, Halogen .240
Index
A
B
I

Î
............................
Capacities Chart .288
.............
Carbon Monoxide Hazard . 51
............................
Carrying, Cargo .159
Cassette Player ............................................
Care .144
...................................
Operation .141
..............
CAUTION, Explanation of . ii
...................................
CD Changer .137
.......................................
CD Player .135
..................................
Ceiling Light .110
........................
Certif ication Label .286
............................................
Chains .237
Changing Oil ........................................
How to .207
......................................
When to .196
....................
Changing a Flat Tire .259
............
Changing Engine Coolant . 212
...
Charging System Indicator . 56,272
............
Checklist, Bef ore Driving . 164
..................
Childproof Door Locks . 84
.....................................
Child Saf ety .21
.......................................
Child Seats .26
..........
Tether Anchorage Points . 41
....................
Cleaner Element, Air . 220Cleaning
....................
Aluminum Wheels .251
...................................
Carpeting .252
......................................
Exterior .250
.......................................
Interior .252
.......................................
Leather .253
...................................
Seat Belts .253
...........................................
Vinyl .253
....................................
Windows .254
.......
Climate Control System . 114,121
.........................
Clock, Setting the .104
..........................
CO in the Exhaust .51
........................................
Coin Box .105
............
Cold Weather, Starting in . 165
..............................
Compact Spare .258
.................
Console Compartment . 105
...............
Consumer Inf ormation . 300
.............
Controls, Instruments and . 53
Coolant ........................................
Adding .210
....................................
Checking .155
.........................
Proper Solution .210
...................................
Replacing .212
...................
Temperature Gauge . 62
....................
Corrosion Protection .255 Crankcase Emissions Control
........................................
System .294
..............
Cruise Control Operation . 72
..........
Customer Relations Of f ice . 300
................
DANGER, Explanation of . ii
...................................
Dashboard .2, 54
................
Daytime Running Lights . 66
............
Def ects, Reporting Saf ety . 303
................
Def ogger, Rear Window . 70
......
Def rosting the Windows . 120,125
....................................
Dimensions .288
...............
Dimming the Headlights . 65
Dipstick ..........
Automatic Transmission . 216
..................................
Engine Oil .154
..........................
Directional Signals .67
........
Disc Brake Wear Indicators . 176
.....................
Disposal of Used Oil .209
Doors ..............................
Monitor Light .58
......................
Power Door Locks .79
..........
DOT Tire Quality Grading . 290
.....................................
Drive Belts .230
Index
C
D
II

CONT INUED
...........
Driver and Passenger Safety . 5
...........................................
Driving .163
....................................
Economy .156
.........................
In Bad Weather .182
................
In Foreign Countries . 293
..............................
Economy, Fuel .156
............
Emergencies on the Road . 257
.............
Battery, Jump Starting . 266
...........
Brake System Indicator . 275
................
Changing a Flat Tire . 259
.....
Charging System Indicator . 272
..................
Checking the Fuses . 277
.....
Low Oil Pressure Indicator . 271
...
Malf unction Indicator Lamp . 273
...
Manually Closing Moonroof . 276
..................
Overheated Engine . 269
.........................
Emergency Brake .103
......................
Emergency Flashers .69
......................
Emergency Towing .282
............
Emergency Trunk Opener . 86
.......................
Emissions Controls .294
.............
Emissions Testing, State . 297Engine
............................................
Belts .230
....
Coolant Temperature Gauge . 62
Malf unction Indicator ................................
Lamp .56, 273
........
Oil Pressure Indicator . 56,271
..............
Oil, What Kind to Use . 205
...............................
Overheating .269
............................
Specif ications .289
............................
Speed Limiter .173
.......................................
Starting .165
......................
Ethanol in Gasoline .292
.
Evaporative Emissions Controls . 294
...............................
Exhaust Fumes .51
Expectant Mothers, Use of Seat ........................................
Belts by .19
..................
Exterior, Cleaning the . 250
..........................
Fan, Interior .118, 123
Features, Comfort and ..............................
Convenience .113
....................
Filling the Fuel Tank . 151
Filter ................................
Air Cleaner .220 .......................
Air Conditioning .230
...............................................
Oil .207
.............
Flashers, Hazard Warning . 69
...................
Flat Tire, Changing a . 259
.....................................
Floor Mats .252
Fluids ..........
Automatic Transmission . 216
..........................................
Brake .218
..........................
Power Steering .219
................
Windshield Washers . 215
FM Stereo Radio ...................................
Reception .128
.....
Foreign Countries, Driving in . 293
..........................
Four-way Flashers .69
..............................
Front Airbags .9 ,45
.................................................
Fuel .150
......................
Fill Door and Cap .151
...........................................
Gauge .62
................
Octane Requirement . 150
...............................
Oxygenated .292
........................
Reserve Indicator .59
........................
Tank, Filling the .151
.....................
Fuses, Checking the .277
Index
E
F
III

...
Identif ication Number, Vehicle . 286Ignition
..............................................
Keys .76
...........................................
Switch .78
............
Timing Control System . 295
........................
Immobilizer System .77
.........
Important Safety Precautions . 6
.........
Indicators, Instrument Panel . 55
...............................
Inf ant Restraint .30
......................................
Inf ant Seats .30
..........
Tether Anchorage Points . 41
...................
Inf lation, Proper Tire . 232
.................................
Inside Mirror .101
.............................
Inspection, Tire .233
............................
Instrument Panel .55
........
Instrument Panel Brightness . 67
...........................
Interior Cleaning .252
...............................
Interior Lights .110
........................................
Introduction .i
........................
Jacking up the Car .261
.......................................
Jack, Tire .260
................................
Jump Starting .266
.............
Halogen Headlight Bulbs . 240
..............
Hazard Warning Flashers . 69
........................................
Headlights .65
........................................
Aiming .240
Automatic Lighting Off .....................................
Feature .66
............
Daytime Running Lights . 66
..................
High Beam Indicator . 58
....................
Lights On Indicator .58
.........................
Reminder Chime .65
........
Replacing Halogen Bulbs . 240
...................................
Turning on .65
..............................
Head Restraints .95
.............
High Altitude, Starting at . 165
.................
High-Low Beam Switch . 65
HomeLink Universal .................................
Transmitter .88
....................................
Hood Latch .219
.......................
Hood, Opening the .152
.................................
Hydroplaning .183
...............
Gas Mileage, Improving . 156
..........................................
Gasohol .292
.........................................
Gasoline .150
...............
Fuel Reserve Indicator . 59
...........................................
Gauge .62
................
Octane Requirement . 150
........................
Tank, Filling the .151
................
Gas Station Procedures . 150
Gauges ...
Engine Coolant Temperature . 62
...............................................
Fuel .62
...............................
Speedometer .60
.................................
Tachometer .60
GAWR (Gross Axle Weight .......................................
Rating) .185
Gearshif t Lever Positions ..........
Automatic Transmission . 166
..............................
Glass Cleaning .254
........................................
Glove Box .87
GVWR (Gross Vehicle Weight ............................................
Rating) .185
Index
GH
IJ
IV