2002 Acura MDX ignition

If the indicator remains on past three
driving trips, or the f uel cap was not
loose or missing, have the vehicle
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.
Youshouldalsohavethedealer
inspect your vehicle if this indicator
comes on repeatedly, even though it
may turn of f as you continue driving.
This indicator comes on when you
turn the ignition switch ON (II) and
goes of f 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 vehicle’s
perf ormance, it can reduce your f uel
economy and cause your vehicle to
put out excessive emissions.
Continued operation may cause
serious damage. If you have recently ref ueled your
vehicle, 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 may also come on
along with the ‘‘D ’’ indicator.
5
Malf unction Indicator L amp
T aking Care of t he Unexpect ed329
M MA
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 vehicle’s emissions
controls and engine. Those repairs may
not be covered by your vehicle’s
warranties.
01/09/07 12:47:43 31S3V610_334

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 .)
Your vehicle 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 vehicle’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.
351
T aking Care of t he Unexpect ed
Malf unction Indicator L amp
Readiness Codes
330
01/09/07 12:47:49 31S3V610_335

However, if the brake pedal does not
f eel normal, you should take
immediate action. Because of the
brake system’s dual-circuit design, a
problem in one part of the system
will still give you braking at two
wheels. You will f eel the brake pedal
go down much f arther bef ore the
vehicle begins to slow down, and you
will have to press harder on the
pedal. The distance needed to stop
will be much longer. If it comes on at any other time, it
indicates a problem with the vehicle’s
brake system. In most cases, the
problem is a low f luid level in the
brake f luid reservoir. Press lightly on
the brake pedal to see if it f eels
normal. If it does, check the brake
f luid level the next time you stop at a
service station (see page ). If the
f luid level is low, take the vehicle to
your dealer and have the brake
system inspected f or leaks or worn
brake pads.Slow down by shif ting to a lower
gear, and pull to the side of the road
when it is saf e. Because of the
longer distance needed to stop, it is
hazardous to drive the vehicle. You
should have it towed, and repaired as
soon as possible. (See
on page .)
If you must drive the vehicle a short
distance in this condition, drive
slowly and cautiously.
The Brake System Indicator comes
on when you turn the ignition ON
(II). If the parking brake is not set, it
goes of f af ter you start the engine. If
the parking brake is set, it goes of f
when you f ully release the parking
brake with the engine running. 273
338Emergency
Towing
Brake System Indicator
T aking Care of t he Unexpect ed331
B BR RAA K
KEE S
SYYSSTTE
EM
M I
INND DI
ICCA A T
TO
OR R
U
U. .S
S. .i
inn d
di
icca at too r
r s
shh o
ow
wn n
01/09/07 12:47:58 31S3V610_336

If something electrical in your
vehicle stops working, the first thing
youshouldcheckforisablownfuse.
Determine f rom the chart on pagesand , or the diagram on the
f use box lid (the diagram f or the
driver’s side interior f use box is on
the kick panel below the f use box),
which f use or f uses control that
component. Check those f uses f irst,
but check all the f uses bef ore
deciding that a blown f use is not the
cause. Replace any blown f uses and
check the component’s operation.
Turn the ignition switch to LOCK
(0). Make sure the headlights and
all other accessories are off.
Remove the cover f rom the f use
box.
The secondary f use box is in the
engine compartment next to the
battery.
The primary under-hood f use box is
located in the back of the engine
compartment on the passenger’s side.
To open it, push the tabs as shown. 1.
2.336 337
CONT INUED
Checking and Replacing Fuses
Fuses
T aking Care of t he Unexpect ed333
U UN
NDDE
ER
R- -H
H O
OO ODD
U
UN NDDE
ER
R- -H
H O
OO ODD
01/09/07 12:48:15 31S3V610_338

Thediagramsinthissectiongive
you the dimensions and capacities of
your Acura, and the locations of the
identif ication numbers. It also
includes inf ormation you should
know about your vehicle’s tires and
emissions control systems.................
Identif ication Numbers .340
................................
Specif ications .342
..........
DOT Tire Quality Grading .344
Unif orm Tire Quality ..................................
Grading .344
.................................
Treadwear .344
......................................
Traction .344
.............................
Temperature .345 .........................
Oxygenated Fuels .346
......
Driving in Foreign Countries .347
.......................
Emissions Controls .348
.....................
The Clean Air Act .348
Crankcase Emissions Control
....................................
System .348
Evaporative Emissions Control ....................................
System .348
Onboard Ref ueling Vapor ................................
Recovery .348
...
Exhaust Emissions Controls .349
....................
PGM-FI System .349
Ignition Timing Control
................................
System .349
Exhaust Gas Recirculation ...................
(EGR) System .349
Three Way Catalytic ...........................
Converter .349
....................
Replacement Parts .349
..
Three Way Catalytic Converter .350
..............
State Emissions Testing .351
....
Testing of Readiness Codes .351
T echnical Inf ormat ion
T echnical Inf ormation339
01/09/07 12:49:10 31S3V610_344

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 vehicle. Read your
warranty manual f or more informa-
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 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.
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 Acura replacement parts or
their equivalent f or repairs. Using
lowerqualitypartsmayincreasethe
emissions f rom your vehicle.
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
T echnical Inf ormation
Emissions Cont rols
349
01/09/07 12:50:56 31S3V610_354

CONT INUED
...
Accessories and Modif ications .201
................................
Accessories .201
...
Additional Safety Precaution .202
............................
Modif ications .202
ACCESSORY (Ignition Key .......................................
Position) .82
............
Accessory Power Sockets .115
....................
Additives, Engine Oil .262
...............................
Airbag (SRS) .9,50
.....................
Air Cleaner Element .275
..............
Air Conditioning System .124
..............................
Maintenance .284
.....................
Rear A/C Control .130
.........................................
Usage .124
.......................
Air Outlets (Vents) .122
.......................
Air Pressure, Tires .286
.......................
Alcohol in Gasoline .346
.......
Aluminum Wheels, Cleaning .307
......................................
Antif reeze .265
Anti-lock Brakes (ABS)
....................
Indicator Light .63,222
...................................
Operation .221
..............
Anti-thef t, Audio System .170
.
Anti-thef t Steering Column Lock .81 ..........................
Appearance Care .305
........................
Audio System .133,151
...
Automatic Seat Belt Tensioners .48
...
Automatic Lighting Off Feature .73
.............
Automatic Speed Control .172
..............
Automatic Transmission .211
..........................
Capacity, Fluid .342
...............
Checking Fluid Level .271
.......................................
Shif ting .212
.
Shif t Lever Position Indicator .211
................
Shif t Lever Positions .212
....................
Shif t Lock Release .215
Battery Charging System ...........................
Indicator .62,328
............................
Jump Starting .323
..............................
Maintenance .280
............................
Specif ications .343
..............................
Bef ore Driving .193
....................................
Belts,Seat .8,46
.........................
Beverage Holders .110
...................................
Body Repair .312 Brakes
...........
Anti-lock System (ABS) .221
.............
Break-in, New Linings . 194
...........................................
Fluid .273
....................
Bulb Replacement .298
.......................................
Parking .106
.................
System Indicator . 63,331
........................
Wear Indicators .220
.............................
Braking System .220
.................
Break-in, New Vehicle . 194
..
Brightness Control, Instruments . 73
........................
Brights, Headlights .72
Bulb Replacement ..........................
Back-up Lights .298
..............................
Brake Lights .298
......................
Cargo Area Light .301
................
Front Parking Lights . 296
........
Front Side Marker Lights . 296
.................................
Headlights .295
.........
High-mount Brake Light . 299
..............
Individual Map Lights . 300
...................
License Plate Light . 300
.................................
Rear Bulbs .298
............................
Specif ications .343
............
Turn Signal Lights . 296,298
Index
A
B
I
01/09/07 12:52:14 31S3V610_364

.................................................
Fuel .194
......................
Fill Door and Cap .195
...........................................
Gauge .68
................
Octane Requirement .194
...............................
Oxygenated .346
........................
Reserve Indicator .65
........................
Tank, Filling the .195
.....................
Fuses, Checking the .333
...............
Gas Mileage, Improving .200
..........................................
Gasohol .346
.........................................
Gasoline .194
...............
Fuel Reserve Indicator .65
...........................................
Gauge .68
................
Octane Requirement .194
........................
Tank, Filling the .195
................
Gas Station Procedures .195
Gauges
...
Engine Coolant Temperature .68
...............................................
Fuel .68
...............................
Speedometer .67
.................................
Tachometer .67
GAWR (Gross Axle Weight .......................................
Rating) .227 GCWR (Gross Combined Weight
.......................................
Rating) .227
............
Gearshif t Lever Positions .212
..............................
Glass Cleaning .310
........................................
Glove Box .89
GVWR (Gross Vehicle Weight
.......................................
Rating) .227
.............
Halogen Headlight Bulbs . 295
..............
Hazard Warning Flashers . 76
........................................
Headlights .72
........................................
Aiming .295
..............
Automatic Lighting Off . 73
............
Daytime Running Lights . 73
..................
High Beam Indicator . 65
...........
High Beams, Turning on . 72
............
Low Beams, Turning on . 72
.........................
Reminder Chime .72
........
Replacing Halogen Bulbs . 295
...................................
Turning on .72
..............................
Head Restraints .94
...............................
Heated Mirror .106
.....................
Heating and Cooling .122
.............
High Altitude, Starting at . 210.................
High-Low Beam Switch . 72
HomeLink Universal ...............................
Transmitter .188
....................................
Hood Latch .277
.......................
Hood, Opening the .196
..................................................
Horn .71
.................................
Hydroplaning .225
...
Identif ication Number, Vehicle . 340
Ignition ..............................................
Keys .79
...........................................
Switch .81
............
Timing Control System . 349
........................
Immobilizer System .80
.........
Important Safety Precautions . 6
.........
Indicators, Instrument Panel . 61
..................
Individual Map Lights . 119
.........................
Inf ant Restraint .26, 30
................................
Inf ant Seats .26, 30
...................
Inf lation, Proper Tire . 286
.................................
Inside Mirror .104
.............................
Inspection, Tire .288
........................
Instrument Panel .2 ,60
........
Instrument Panel Brightness . 73
Index
G HI
IV
01/09/07 12:52:32 31S3V610_367