2003 Acura MDX sensor

The inside mirror can automatically
darken to reduce glare. To turn on
this feature, press the button on the
bottom of the mirror. The AUTO
indicator comes on as a reminder.
When it is on, the mirror darkens
when it senses the headlights of a
vehicle behind you, then returns to
normal visibility when the lights are
gone. Press the button again to turn
of f this sensing.
Keeptheinsideandoutsidemirrors
clean and adjusted f or best visibility.
Be sure to adjust the mirrors bef ore
you start driving.
Mirrors
Inst rument s and Cont rols115
SENSOR
AUTO SWITCH
INDICATOR

...............
Climate Control System . 134
.......
Fully-automatic Operation . 136
.......
Semi-automatic Operation . 137
........
Mode Button/Mode Icon . 139
Sunlight Sensor/ ............
Temperature Sensor . 141
...........................
Rear A/C Unit .142
................................
Audio System .145
AM/FM/Cassette/CD changer ........................
Audio System .145
.................
Operating the Radio . 146
.................
Adjusting the Sound . 149
............
Audio System Lighting . 149
..............................
Digital Clock .150
Operating the Cassette .....................................
Player .151
............
Tape Search Functions . 152
.....
Operating the CD Changer . 155
CD Changer Error .............................
Indications .162
................................
Audio System .163
AM/FM/Cassette/CD Stereo ........................
Audio System .163
.................
Operating the Radio . 164
.................
Adjusting the Sound . 168
............
Audio System Lighting . 169....................
Radio Frequencies . 169
........................
Radio Reception .169
.........
Operating the CD Player . 171
.....
Operating the CD Changer . 173
.......
Protecting Compact Discs . 174
....
CD Player Error Indications . 175
CD Changer Error .............................
Indications .176
Operating the Cassette .....................................
Player .177
............
Tape Search Functions . 178
Caring f or the Cassette .....................................
Player .180
...........
Remote Audio Controls . 181
.......................
Thef t Protection .182
Audio System (Optional on .....................
Touring model) .183
AM/FM/CD/DVD Audio ....................................
System .183
.................
Operating the Radio . 185
.................
Adjusting the Sound . 189
..............................
Digital Clock .190
............
Audio System Lighting . 190
Operating the Cassette .....................................
Player .191
.........
Operating the CD Player . 194 .....
Operating the CD Changer . 196
....
CD Player Error Indications . 197
CD Changer Error .............................
Indications .198
........
Rear Entertainment System . 199
............................
Security System .215
...............................
Cruise Control .216
..............................
Trip Computer .219
.
(Without Navigation System) . 219
HomeLink Universal .................................
Tranceiver .229
.
Rear View Camera and Monitor . 234
Comf ort and Convenience Features
Comf ort and Convenience Feat ures133

Theclimatecontrolsystemhastwo
sensors. A sunlight sensor is located
in the top of the dashboard and a
temperature sensor is next to the
steering column. Do not cover the
sensors or spill any liquid on them. Sunlight Sensor/T emperature
Sensor
Climat e Cont rol Syst em
Comf ort and Convenience Feat ures141
SUNLIGHT SENSORTEMPERATURE SENSOR

The temperature sensor is located
in the f ront bumper. Theref ore,
the temperature reading can be
affected by heat reflection from
the road surf ace, engine heat, and
the exhaust f rom the surrounding
traf f ic. Because of these
conditions, it may take a while f or
the temperature to read correctly.
Instantaneous f uel mileage
The Range, or estimated distance
you can travel on the fuel
remaining in the tank. This
distance is estimated from the fuel
economy you have gotten over the
last several miles, so it will vary
with changes in speed, traf f ic, etc. Outside temperature
Trip Computer
Comf ort and Convenience Feat ures220
ELAPSED TIMERANGEINSTANTANEOUS FUEL MILEAGE
CLOCK COMPASS
AVERAGE FUEL
ECONOMY TRIP METER
OUTSIDE TEMPERATURE

Two f actors normally contribute to
causing corrosion in your vehicle:Moisture trapped in body cavities.
Dirtandroadsaltthatcollectsin
hollows on the underside of the
vehicle stays damp, promoting
corrosion in that area.
Removal of paint and protective
coatings f rom the exterior and
underside of the vehicle. Repair chips and scratches in the
paint as soon as you discover them.
Inspect and clean out the drain
holes in the bottom of the doors
and body.
Check the f loor coverings f or
dampness. Carpeting and f loor
mats may remain damp f or a long
time, especially in winter. This
dampness can eventually cause
the f loor panels to corrode.Use a high-pressure spray to clean
the underside of your vehicle. This
is especially important in areas
that use road salt in winter. It is
also a good idea in humid climates
and areas subject to salt air. Be
caref ul of the ABS wheel sensors
and wiring at each wheel.
Have the corrosion-preventive
coatings on the underside of your
vehicle inspected and repaired
periodically.
Many corrosion-preventive measures
are built into your Acura. You can
help keep your vehicle f rom
corroding by perf orming some
simple periodic maintenance:
1.
2.
Corrosion Prot ect ion
Appearance Care357

If you are planning to take your
Acura outside the U.S., contact the
tourist bureaus in the areas you will
betravelingintofindoutaboutthe
availability of unleaded gasoline with
theproperoctanerating.
If unleaded gasoline is not available,
be aware that using leaded gasoline
in your Acura will af f ect perf or-
mance and fuel mileage, and damage
its emissions controls. It will no
longer comply with U.S. and
Canadian emissions regulations, and
will be illegal to operate in North
America. To bring your vehicle back
into compliance will require the re-
placement of several components,
such as the oxygen sensors and the
three way catalytic converter. These
replacements are not covered under
warranty.
Driving in Foreign Countries
T echnical Inf ormation396

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
Acura replacement parts or their
equivalent f or repairs. Using lower
qualitypartsmayincreasethe
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
Emissions Cont rols
T echnical Inf ormation398