2007 Acura MDX catalytic converter

This shows the temperature of the
engine’s coolant. During normal
operation, the pointer should rise to
about the middle of the gauge. In
severe driving conditions, the pointer
may rise to the upper zone. If it
reaches the red (hot) mark, pull
safely to the side of the road. For instru
ctions and precautions on
checking the engine’s cooling
system, see page . This shows how much f uel you
have. It may show slightly more
or less than the actual amount.
428
Gauges
Temperature Gauge Fuel Gauge
72
U.S. model is shown.SPEEDOMETER
FUEL GAUGE
TEMPERATURE
GAUGE TACHOMETER
Avoid driving with an extremely low
f uel level. Running out of f uel could
cause the engine to misf ire, damaging
the catalytic converter.
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Check the indicator on the
instrument panel to verif y that the
security system is set. If the vehicle is f acing uphill, turn
the front wheels away from the
curb. Never park over dry leaves, tall
grass, or other f lammable
materials. The hot three way
catalytic converter could cause
these materials to catch on fire.
Make sure the parking brake is
f ully released bef ore driving away.
Driving with the parking brake
partially set can overheat or
damage the rear brakes. If the vehicle is f acing downhill,
turn the front wheels toward the
curb, and set the parking brake.
Make sure the moonroof and the
windows are closed.
Turn of f the lights.
Place any packages, valuables, etc.
in the cargo area or take them
with you.
Lock the doors and the tailgate.
Always use the parking brake when
you park your vehicle. Make sure
the parking brake is set f irmly, or
your vehicle may roll if it is parked
on an incline.
Set the parking brake bef ore you put
the transmission in Park. This keeps
the vehicle from moving and putting
pressure on the parking mechanism
in the transmission.
Parking
Parking T ips
342
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Thediagramsinthissectiongive
you the dimensions and capacities of
your vehicle 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 .444
................................
Specif ications .446
DOT Tire Quality Grading
......................
(U.S. Vehicles) .448
Unif orm Tire Quality ..................................
Grading .448
.................................
Treadwear .448
......................................
Traction .448
.............................
Temperature .449
.................................
Tire Labeling .450
Tire Pressure Monitoring System
......................................
(TPMS) .451 .......................
Emissions Controls .453
.....................
The Clean Air Act .453
Crankcase Emissions Control
....................................
System .453
Evaporative Emissions Control ....................................
System .453
Onboard Ref ueling Vapor ................................
Recovery .453
...
Exhaust Emissions Controls .454
....................
PGM-FI System .454
Ignition Timing Control
................................
System .454
Exhaust Gas Recirculation ...................
(EGR) System .454
Three Way Catalytic ...........................
Converter .454
....................
Replacement Parts .454
..
Three Way Catalytic Converter .455
..............
State Emissions Testing .456
T echnical Inf ormation
Technical Inf ormation
443
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The exhaust emissions controls
include f our systems: PGM-FI,
ignition timing control, exhaust gas
recirculation, and three way catalytic
converter. These f our systems work
together to control the engine’s
combustion and minimize the
amount of HC, CO, and NOx that
come 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 f uel 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 ), nitrogen
(N ), and water vapor.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for 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 SystemIgnit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Three Way Catalytic Converter
454
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The three way catalytic converter
contains precious metals that 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
combustible materials that come
near it. Park your vehicle away from
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 vehicle’s three way
catalytic converter.
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. Keep the engine well maintained.
Have your vehicle diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly.
Three Way Catalytic Converter
Technical Inf ormation
455
THREE WAY CATALYTIC CONVERTER
WARM UP THREE WAY CATALYTIC
CONVERTER
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CONT INUED
..................
Storage Compartment .162
....................
Storing Your Vehicle .416
........................................
Sun Visor .164
Supplemental Restraint System
......................................
Servicing .35
.........................
SRS Indicator .33,66
...................
System Components .24
..................................
Synthetic Oil .388
.....................................
Tachometer .72
..........................................
Tailgate .131
...............................
Opening the .131
..............................
Open Monitor .11
.........................................
Power .132
......
Taillights, Changing Bulbs in .400
.
Taking Care of the Unexpected .417
Technical Descriptions
......
DOT Tire Quality Grading .448
.....
Emissions Control Systems .453
Three Way Catalytic
...............................
Converter .455
.......................
Temperature Gauge .72
........
Temperature, Inside Sensor .177
....................
Temperature, Outside .76 ...................
Tensioners, Seat Belts .22
..............
Tether Anchorage Points .51
................
Thef t Protection, Radio .231
..
Three Way Catalytic Converter .455
.
Tilt/Telescopic Steering Wheel .124
....................................
Timing Belt .396
....................................
Tire Chains .414
.........
Tire, How to Change a Flat .419
.................................
Tire Labeling .450
Tire Pressure Monitoring ............
System (TPMS) . 343, 451
Low Tire Pressure ...........................
Indicator . 68, 343
.......
Tire Pressure Monitor . 77, 343
...............................................
Tires .409
..............................
Air Pressure .409
.........................
Checking Wear .411
..........................
Compact Spare .418
......
DOT Tire Quality Grading . 448
......................................
Inf lation .409
..................................
Inspection .411
..............................
Maintenance .411
...................................
Replacing .412
......................................
Rotating .412
...........................................
Snow .414
............................
Specif ications .447 ................................
Tire Chains .414
...................
Tools, Tire Changing . 419
Torque Distribution Monitor .................................
(SH-AWD) .340
Towing .....................................
A Trailer .355
................
Emergency Wrecker . 433
....
Equipment and Accessories . 361
.............................
Weight Limit .356
.........................
Trailer Loading .356
..............
Trailer Stability Assist . 368
.................
Trailer Towing Tips . 364
..................
Trailer Stability Assist . 368
Transmission ...............
Checking Fluid Level . 393
...........................
Fluid Selection .394
..............
Identif ication Number . 444
.............
Shif ting the Automatic . 333
.....................................
Treadwear .411
................................
Trip Computer .78
.......................................
Trip Meter .75
....................................
Turn Signals .67
...................
Tools, Tire Changing . 419
Index
INDEX
T
IX
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