2004 Acura MDX sensor

Theclimatecontrolsystemhastwo
sensors. A sunlight sensor is 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.
Press the RR A/C MANUAL button
to enable the rear A/C control panel.
The light in the button will come on.
A passenger in the second row can
then use the temperature control dial,
f an speed dial, and mode buttons to
adjust the temperature and airflow to
their pref erence. This is limited by
the system’s minimum and
maximum temperature.
Comf ort and Convenience Feat ures
Rear Climate Control, Climate Control Sensors
Sunlight and T emperature
Sensors
Using the Rear A /C Unit
109
SUNLIGHT SENSOR TEMPERATURE SENSOR
TEMPERATURE CONTROL DIAL
MODE BUTTONS
FAN SPEED CONTROL DIAL

Clock
Direction of travel
Outside temperature
Instantaneous f uel mileageTheAvgdisplayshowsyouthe
average f uel economy since you
last reset the display.
The E/T is the elapsed time that
the ignition has been on. It
automatically resets to 0.0 when it
reaches twelve hours. This display
can be reset at any time.
The display also has manual
f unctions f or the Climate Control
System. Ref er to page .
All models of MDX have a trip
computer. To operate the trip
computer on models with the
navigation system, ref er to the
navigation manual.
The Trip Computer displays the
f ollowing inf ormation.
The temperature sensor is located
in the f ront bumper, and can be
affected by heat 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. The Range, or estimated distance
you can travel on the fuel
remaining in the tank estimated
f rom the f uel economy you have
gotten over the last several miles
(kilometers).
The Trip display shows you the
total distance you have driven
since it was last reset.
Press the TRIP button to show either
the range and Avg f uel economy, or
the E/T and Trip odometer.
To reset the Avg f uel economy, E/T,
and Trip odometer, press and hold
the RESET button until you hear a
beep.
The outside temperature, f uel
economy, range, and trip odometer
can be displayed in either English or
Metric units. To change between
units, press the TRIP button and
hold it f or f ive seconds.
104
Trip Computer
Comf ort and Convenience Feat ures
(Without Navigation System) Changing and Resetting the
Display
Changing Units of Measurement
147

Your Acura is equipped with a Tire
Pressure Monitoring System
(TPMS) that turns on every time you
start the engine and monitors the
pressure in your tires while driving.
Each tire has its own pressure
sensor. If the air pressure of a tire
becomes signif icantly low, the
sensor in that tire immediately sends
a signal that causes the low tire
pressure indicator and the
appropriate tire on the Tire Pressure
Monitor to come on.Driving on a signif icantly under-
inf lated tire causes the tire to
overheat and can lead to tire failure.
Under-inf lation also reduces f uel
efficiency and tire tread life, and may
af f ect the vehicle’s handling and
stopping ability.
When the tire pressure monitoring
system warning light is lit, one or
more of your tires is signif icantly
under-inf lated. You should stop and
check your tires as soon as possible,
and inflate them to the proper
pressureasindicatedonthevehicle’s
tire inf ormation placard. Each tire, including the spare should
be checked monthly when cold and
set to the recommended inf lation
pressure as specif ied in the vehicle
placard and owner’s manual (see
page ).
Although your tire pressure is
monitored, you must manually check
thetirepressuresmonthly.
If you think you can saf ely drive a
short distance to a service station,
proceed slowly to the station and
inflate the tire to the recommended
pressure shown on the driver’s
doorjamb.
If the tire is f lat, or if the tire
pressure is too low to continue
driving, replace the tire with the
compact spare tire.
222
Tire Pressure Monitoring System (TPMS)
Driving
Low Tire Pressure
Indicator
177

The appropriate tire indicator and
Low Tire Pressure Indicator will
come on if a tire becomes
signif icantly underinf lated. Follow
the instructions under ‘‘Low Tire
Pressure Indicator’’.The indicator comes on and stays on
when there is a problem with the
Tire Pressure Monitoring System.
If this happens, the system will shut
of f and no longer monitor tire
pressures. Have the system checked
by an Acura dealer as soon as
possible.
If you have a f lat tire, the Low Tire
Pressure and Tire monitor indicators
will come on. Replace the indicated
flat tire with the compact spare tire
(see page ).Each wheel is equipped with a tire
pressure sensor mounted inside the
tire behind the valve stem. You must
use TPMS specif ic wheels. It is
recommended that you always have
your tires serviced by your Acura
dealer or qualif ied technician.
Af ter you replace the f lat tire, the
Low Tire Pressure indicator will stay
on.Thisisnormal;thesystemisnot
monitoring the spare tire pressure.
Manually check the spare tire
pressure to be sure it is correct.
Never use a puncture-repairing agent
in a f lat tire. If used, you will have to
replace the tire pressure sensor.
Havetheflattirerepairedbyan
Acura dealer as soon as possible.
231
Tire Pressure Monitoring System (TPMS)
Driving
Tire Pressure Monitor
Tire Pressure Monitoring
System (T PMS) Indicator
ChangingtheTirewithTPMS
178

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 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
operating 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
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual f or more informa-
tion. 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.
2
2
Emissions Cont rols
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 ormation260