2003 Acura TL check engine

Youshouldalsohavethedealer
inspect your car if this indicator
comes on repeatedly, even though it
may turn of f as you continue driving. If the indicator remains on past three
driving trips, or the f uel cap was not
loose or missing, have the car
checked by the dealer as soon as
possible. Drive moderately until the
dealer has inspected the problem.
Avoid full-throttle acceleration and
driving at high speed. If you have recently ref ueled your
car, the cause of this indicator
coming on could be a loose or
missing f uel f ill cap. Check the cap
and tighten it until it clicks several
times. Replace the f uel f ill cap if it is
missing. Tightening the cap will not
make the indicator turn of f
immediately; it takes at least three
driving trips.
This indicator should light when the
ignition switch is ON (II), and go out
af ter the engine starts. If it comes on
at any other time, it indicates one of
the engine’s emissions control
systems may have a problem. Even
though you may f eel no dif f erence in
your car’s perf ormance, it can
reduce your f uel economy and cause
your car to put out excessive
emissions. Continued operation may
cause serious damage.
CONT INUED
Malf unction Indicator L amp
T aking Care of t he Unexpect ed303
M M A
AL
LFFUUN NCCTTI
IOON N I
INND DI
ICCA A T
TO
OR R L
LAA M
M P
P
If you keep driving with the
malf unction indicator lamp on, you can
damage your car’s emissions controls
and engine. Those repairs may not be
covered by your car’s warranties.

Your car has certain ‘‘readiness
codes’’ that are part of the on-board
diagnostics f or the emissions
systems. In some states, part of the
emissions testing is to make sure
these codes are set. If they are not
set, the test cannot be completed.
If your car’s battery has been
disconnected or gone dead, these
codes are erased. It takes several
days of driving under various
conditions to set the codes again.If possible, do not take your vehicle
f or a state emissions test until the
readiness codes are set. To check if
they are set, turn the ignition ON (II),
but do not start the engine. The
Malf unction Indicator Lamp will
come on f or 20 seconds. If it then
goes of f , the readiness codes are set.
If it blinks 5 times, the readiness
codes are not set. Ref er to State
Emissions Testing f or more
inf ormation.(See page .)
327
Malf unction Indicator L amp
T aking Care of t he Unexpect ed
Readiness Codes
304

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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:
334
NOTE: Dealers and Companies please provide dealer or company name,
and also the name of the person to whose attention the shipment should
be sent. For purchases outside U.S.A. please write to the address shown
below for a quotation.
P.O. BOX 07280·DETROIT, MICHIGAN 48207·1-800-782-4356
Customer Name Attention
Apartment Number
State & Zip Code
City
Daytime Telephone Number
Check or money order enclosed payable to Helm Inc U.S. funds only.
Do not send cash
Master
Card VISA
Check here if your billing address is different
from the shipping address shown above.
Account Number Expiration: Mo. Yr.
CUSTOMER SIGNATURE DATE
Street Address No P.O. Box Number
()
These Publications cannot be returned for credit without receiving advance authorization within 14
days of delivery. On returns, a restocking fee may be applied against the original order.

CONT INUED
...
Accessories and Modif ications . 181
................................
Accessories .181
.
Additional Safety Precautions . 182
............................
Modif ications .182
ACCESSORY (Ignition Key .......................................
Position) .79
............
Accessory Power Sockets . 110
....................
Additives, Engine Oil . 235
...............................
Airbag (SRS) .9, 47
.....................
Air Cleaner Element .248
......
Air Conditioning System . 118,123
..............................
Maintenance .258
.................................
Usage .118, 123
.......................
Air Pressure, Tires .261
.......................
Alcohol in Gasoline .322
......................................
Antif reeze .238
Anti-lock Brakes (ABS) ...............................
Indicator .60, 202
...................................
Operation .201
..............
Anti-thef t, Audio System . 151
.
Anti-thef t Steering Column Lock . 78
..........................
Appearance Care .279
................................
Audio System .129
...
Automatic Lighting Off Feature . 70 ...
Automatic Seat Belt Tensioners . 45
.............
Automatic Speed Control . 153
..............
Automatic Transmission . 190
..........................
Capacity, Fluid .318
...............
Checking Fluid Level . 244
.......................................
Shif ting .190
.
Shif t Lever Position Indicator . 190
................
Shif t Lever Positions . 191
....................
Shif t Lock Release . 197
Battery Charging System ...........................
Indicator .59, 302
............................
Jump Starting .296
..............................
Maintenance .253
............................
Specif ications .319
..............................
Bef ore Driving .173
....................................
Belts,Seat .8,44
...........................
Beverage Holder .108
...................................
Body Repair .286
Brakes ...........
Anti-lock System (ABS) . 201
.............
Break-in, New Linings . 174
....................
Bulb Replacement .273 ...........................................
Fluid .246
.......................................
Parking .104
.................
System Indicator . 59,305
........................
Wear Indicators .200
.............................
Braking System .200
........................
Break-in, New Car .174
..
Brightness Control, Instruments . 71
........................
Brights, Headlights .69
Bulb Replacement ..........................
Back-up Lights .273
..............................
Brake Lights .273
..............................
Ceiling Light .275
........................
Courtesy Lights .275
.................................
Fog Lights .272
........
Front Side Marker Lights . 270
.................................
Headlights .269
.........
High-mount Brake Light . 274
...................
License Plate Light . 274
............................
Specif ications .319
...................................
Spotlights .275
....................
Turn Signal Lights . 270
..............................
Bulbs, Halogen .269
Index
A
B
I

Î
............................
Capacities Chart .318
.............
Carbon Monoxide Hazard . 53
............................
Carrying, Cargo .183
Cassette Player ............................................
Care .141
...................................
Operation .137
..............
CAUTION, Explanation of . ii
...................................
CD Changer .142
..................................
Ceiling Light .111
........................
Certif ication Label .316
............................................
Chains .266
Changing Oil ........................................
How to .235
......................................
When to .224
....................
Changing a Flat Tire .289
............
Changing Engine Coolant . 240
...
Charging System Indicator . 59,302
............
Checklist, Bef ore Driving . 188
..................
Childproof Door Locks . 84
.....................................
Child Saf ety .21
.......................................
Child Seats .26
..........
Tether Anchorage Points . 41
....................
Cleaner Element, Air . 248Cleaning
....................
Aluminum Wheels .281
...................................
Carpeting .282
......................................
Exterior .280
.................................
Floor Mats .282
.......................................
Interior .282
.......................................
Leather .283
...................................
Seat Belts .283
...........................................
Vinyl .283
....................................
Windows .284
.......
Climate Control System . 118,123
.........................
Clock, Setting the .105
..........................
CO in the Exhaust .53
........................................
Coin Box .106
............
Cold Weather, Starting in . 189
..............................
Compact Spare .288
.................
Console Compartment . 106
...............
Consumer Inf ormation . 330
.............
Controls, Instruments and . 55
Coolant ........................................
Adding .238
....................................
Checking .179
.........................
Proper Solution .238
...................................
Replacing .240
...................
Temperature Gauge . 66
....................
Corrosion Protection .285 Crankcase Emissions Control
........................................
System .324
............
Cruise Control Operation . 153
..........
Customer Relations Of f ice . 330
................
DANGER, Explanation of . ii
...................................
Dashboard .2, 56
................
Daytime Running Lights . 70
............
Def ects, Reporting Saf ety . 332
................
Def ogger, Rear Window . 74
......
Def rosting the Windows . 122,127
....................................
Dimensions .318
...............
Dimming the Headlights . 69
Dipstick ..........
Automatic Transmission . 244
..................................
Engine Oil .178
..........................
Directional Signals .71
........
Disc Brake Wear Indicators . 200
.....................
Disposal of Used Oil .237
Doors ..............................
Monitor Light .62
......................
Power Door Locks .79
..........
DOT Tire Quality Grading . 320
.....................................
Drive Belts .259
Index
C
D
II

CONT INUED
...........
Driver and Passenger Safety . 5
...........................................
Driving .187
....................................
Economy .180
.........................
In Bad Weather .209
................
In Foreign Countries . 323
Driving Position Memory ..........................................
System .96
..................
Dust and Pollen Filter . 259
..............................
Economy, Fuel .180
............
Emergencies on the Road . 287
.............
Battery, Jump Starting . 296
...........
Brake System Indicator . 305
................
Changing a Flat Tire . 289
.....
Charging System Indicator . 302
..................
Checking the Fuses . 307
.....
Low Oil Pressure Indicator . 301
...
Malf unction Indicator Lamp . 303
...
Manually Closing Moonroof . 306
..................
Overheated Engine . 299
.........................
Emergency Brake .104
......................
Emergency Flashers .73
......................
Emergency Towing .312
............
Emergency Trunk Opener . 86.......................
Emissions Controls .324
.............
Emissions Testing, State . 327
Engine ............................................
Belts .259
....
Coolant Temperature Gauge . 66
Malf unction Indicator ................................
Lamp .59, 303
........
Oil Pressure Indicator . 59,301
..............
Oil, What Kind to Use . 233
...............................
Overheating .299
............................
Specif ications .319
............................
Speed Limiter .197
.......................................
Starting .189
......................
Ethanol in Gasoline .322
.
Evaporative Emissions Controls . 324
...............................
Exhaust Fumes .53
Expectant Mothers, Use of Seat ........................................
Belts by .19
..................
Exterior, Cleaning the . 280
..........................
Fan, Interior .120, 125
Features, Comfort and ..............................
Convenience .115
....................
Filling the Fuel Tank . 175Filter
................................
Air Cleaner .248
.........................
Dust and Pollen .259
...............................................
Oil .235
.............
Flashers, Hazard Warning . 73
...................
Flat Tire, Changing a . 289
.....................................
Floor Mats .282
Fluids ..........
Automatic Transmission . 244
..........................................
Brake .246
..........................
Power Steering .247
................
Windshield Washers . 243
FM Stereo Radio ...................................
Reception .135
........................................
Fog Lights .70
.....
Foreign Countries, Driving in . 323
..........................
Four-way Flashers .73
..............................
Front Airbags .9 ,47
.................................................
Fuel .174
......................
Fill Door and Cap .175
...........................................
Gauge .66
................
Octane Requirement . 174
...............................
Oxygenated .322
........................
Reserve Indicator .63
........................
Tank, Filling the .175
Index
E
F
III

.....................
Fuses, Checking the .307
...............
Gas Mileage, Improving . 180
..........................................
Gasohol .322
.........................................
Gasoline .174
...............
Fuel Reserve Indicator . 63
...........................................
Gauge .66
................
Octane Requirement . 174
........................
Tank, Filling the .175
................
Gas Station Procedures . 174
Gauges ...
Engine Coolant Temperature . 66
...............................................
Fuel .66
...............................
Speedometer .64
.................................
Tachometer .64
GAWR (Gross Axle Weight .......................................
Rating) .212
Gearshif t Lever Positions ..........
Automatic Transmission . 190
..............................
Glass Cleaning .284
........................................
Glove Box .87
GVWR (Gross Vehicle Weight .......................................
Rating) .212 .............
Halogen Headlight Bulbs . 269
..............
Hazard Warning Flashers . 73
........................................
Headlights .69
........................................
Aiming .269
Automatic Lighting Off .....................................
Feature .70
............
Daytime Running Lights . 70
..................
High Beam Indicator . 62
.........................
Reminder Chime .69
........
Replacing Halogen Bulbs . 269
...................................
Turning on .69
..............................
Head Restraints .91
.............
High Altitude, Starting at . 189
.................
High-Low Beam Switch . 69
HomeLink Universal ................................
Transceiver .157
....................................
Hood Latch .247
.......................
Hood, Opening the .176
.................................
Hydroplaning .210
...
Identif ication Number, Vehicle . 316Ignition
..............................................
Keys .76
...........................................
Switch .78
............
Timing Control System . 325
........................
Immobilizer System .77
.........
Important Safety Precautions . 6
.........
Indicators, Instrument Panel . 57
...............................
Inf ant Restraint .30
......................................
Inf ant Seats .30
..........
Tether Anchorage Points . 41
...................
Inf lation, Proper Tire . 261
...................................
Inside Mirror .94
.............................
Inspection, Tire .262
............................
Instrument Panel .57
........
Instrument Panel Brightness . 71
...........................
Interior Cleaning .282
...............................
Interior Lights .111
........................................
Introduction .i
........................
Jacking up the Car .291
.......................................
Jack, Tire .290
................................
Jump Starting .296
Index
G H
IJ
IV

CONT INUED
..................................................
Keys .76
.......................
Label, Certif ication .316
.................
Lane Change, Signaling . 71
..................
Lap/Shoulder Belts . 15,44
Lights ....................
Bulb Replacement .269
.......................................
Indicator .57
.........................................
Parking .69
..................................
Turn Signal .71
.....................................
Load Limit .184
......
LOCK (Ignition Key Position) . 78
........................
Lockout Prevention .80
Locks .......
Anti-thef t Steering Column . 78
............................
Fuel Fill Door .175
....................................
Glove Box .87
.................................
Power Door .79
...........................................
Trunk .85
........................
Low Coolant Level .179
...
Low Oil Pressure Indicator . 59,301
...
Lubricant Specif ications Chart . 318.........................................
Luggage .183
..................................
Maintenance .219
...
Owner Maintenance Checks . 231
........................................
Record .229
......................
Required Indicator .67
..........................................
Saf ety .220
.............................
Schedule .224-228
Malf unction Indicator ....................................
Lamp .59, 303
.............
Memory, Driving Position . 96
...............................
Meters, Gauges .64
...................
Methanol in Gasoline . 322
..........................
Mirrors, Adjusting .94
.......................................
Moonroof .103
......................
Closing Manually .306
...................................
Operation .103
...................
Neutral Gear Position . 193
..................
New Vehicle Break-in . 174
...................
NOTICE, Explanation of . i
...............
Numbers, Identif ication . 316 ...
Octane Requirement, Gasoline . 174
.........................................
Odometer .65
...............................
Odometer, Trip .65
Oil ........................
Change, How to .235
......................
Change, When to .224
......................
Checking Engine .178
..............
Pressure Indicator . 59,301
Selecting Proper Viscosity ......................................
Chart .234
...........
ON (Ignition Key Position) . 79
Onboard Ref ueling Vapor ....................................
Recovery .324
............................................
OnStar .162
..
Operation in Foreign Countries . 323
..............................
Outside Mirrors .94
....................
Overheating, Engine .299
.......
Owner Maintenance Checks . 231
.........................
Oxygenated Fuels .322
Index
K
L
NO
M
V