2008 Acura RL 2008 Acura RL

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µ Tires marked ‘‘M S’’ or ‘‘All
Season’’ on the sidewall have an all-
weather tread design suitable for
most winter driving conditions.
For the best perf ormance in snowy
or icy conditions, you should install
snow tires or tire chains. They may
be required by local laws under
certain conditions.
If you mount snow tires on your
vehicle, make sure they are radial
tires of the same size and load range
as the original tires. Mount snow
tires on all f our wheels. The traction
provided by snow tires on dry roads
maybelowerthanyouroriginaltires.
Check with the tire dealer f or
maximum speed recommendations.
Wheels:
Tires:
See page f or DOT tire quality
grading inf ormation, and page
f or tire size explanation.
It is best to replace all f our tires at
thesametime.If thatisnotpossible
or necessary, replace the two f ront
tires or two rear tires as a pair.
Replacing just one tire can seriously
af f ect your vehicle’s handling.
If you ever need to replace a wheel,
make sure the wheel’s specif ications
match those of the original wheel
that came on your vehicle.
Replacement wheels are available at
your Acura dealer.
There are no snow tires compatible
with the PAX system.
466
468
On models with the Michelin PAX system
On models with the Michelin PAXsystem
Tires
Winter Driving
Wheels and T ires
Snow T ires
424
17x8.0JAL(TPMS)
235 460A (TPMS)
P245/50R17 98V
245-680R460A 102V
Installing improper tires on your
vehicle can affect handling and
stability. This can cause a crash
in which you can be seriously
hurt or killed.
Always use the size and type of
tires recommended in this
owner’s manual.
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When installing cables, f ollow the
manuf acturer’s instructions, and
mount them as tight as you can.
Make sure they are not contacting
the brake lines or suspension. Drive
slowly with them installed. If you
hear them coming into contact with
the body or chassis, stop and
investigate. Remove them as soon as
you begin driving on cleared roads.
Mount tire chains on your tires when
required by driving conditions or
local laws. Install them only on the
f ront tires.
Because your vehicle has limited tire
clearance, Acura strongly
recommends using the chain listed
below, made by Security Chain
Company (SCC).
Tire chains cannot be used with a
flat front tire. If a front tire goes flat
when a tire chain is installed on it,
remove the chain, and f ollow the
precautions described under
Michelin PAX System (see page
).
Cable-type: SCC Radial Chain
CH2612T
426
Tires
T ire Chains
Maint enance
425
Using the wrong chains, or not
properly installing chains, can
damage the brake lines and
cause a crash in which you can
be seriously injured or killed.
Follow all instructions in this
owner’s manual regarding the
selection and use of tire chains.
Traction devices that are the wrong
size or improperly installed can
damage your vehicle’s brake lines,
suspension, body, and wheels. Stop
driving if they are hitting any part of
the vehicle.
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There are no snow tires compatible
with the PAX system, and not all tire
chains are suitable f or use on the
PAX system tires.If you must continue driving with a
f lat tire, f ollow all the procedures
and precautions described on page.
Never use a tire repair agent in a
PAX system tire, and never repair
a PAX system tire by yourself .
Repair or replacement must be
done by an Acura dealer or an
authorized Michelin PAX system
dealer.
Your vehicle is equipped with the
Michelin PAX system which,
together with the tire pressure
monitoring system (TPMS), enables
you to continue driving even if one or
more of your tires loses its pressure.
The tires and wheels on your vehicle
are specially designed f or the PAX
system, and the PAX system is
specif ically designed and f ine-tuned
foryourvehicle.
Because of these reasons, use only
the wheels and tires designated in
this owner’s manual. Never mix PAX
system wheels or tires with
conventional wheels or tires. If you mount snow chains on your
tires, use the chains recommended
by Acura (see page ).
Do not replace the PAX system tires
and wheels with conventional tires
andwheels.Doingsowoulddisable
the PAX system and the tire
pressure monitoring system (TPMS),
and may void your new vehicle
warranty.
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425
If equipped
MichelinPAX SystemImport ant Precaut ions
Tires
426
TM
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2008 RL

If you get a f lat tire, never try to
repair it yourself , and never replace a
flat tire with a compact spare tire.
With the PAX system tires, you can
drive up to about 125 miles (200 km)
even if one or more of your tires are
punctured. This allows you to drive
to the nearest Acura dealer or
authorized Michelin PAX system
dealer to have the tire(s) repaired.The above message shows that you
are driving your vehicle on a flat tire,
andshouldobservethe‘‘RUNFLAT
DRIVING’’ speed limit of 50 mph
(80 km/h). Drive to your nearest
Acura dealer or authorized Michelin
PAX system dealer, or call the PAX
help hotline at 1-877-PAXTIRE
(1-877-729-8473).If the display changes to the above
message, it means that ‘‘RUN FLAT
DRIVING’’ is nearing the limit, and
you have to stop driving soon. Take
your vehicle to the nearest Acura
dealer or authorized Michelin PAX
system dealer as soon as possible.
Follow the instructions shown on the
multi-inf ormation display, and drive
very caref ully.
CONT INUED
Driving With a Flat Tire
T aking Care of t he Unexpect ed
433
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If you see the above message on the
multi-inf ormation display, you have
reached the limit of run f lat driving,
and you should stop driving
immediately. Be aware that if you
continue to drive, the noise and
vibration level f rom the tire will
increase signif icantly, and the tire
may no longer be repairable.Stop driving immediately when
you see a ‘‘RUN FLAT LIMIT
STOP DRIVING’’ message on the
multi-inf ormation display.
Continuous driving af ter this
message will make it impossible to
repair the tire.
Call a prof essional towing service
who can transport your vehicle on
f lat-bed equipment. Never tow your vehicle behind another vehicle with a
rope or chain. Flat-bed equipment is
the only way to transport your
vehicle.
Do not drive f aster than 50 mph
(80 km/h).
Drive caref ully. Your vehicle may
handle dif f erently f rom when the
tires are properly inf lated,
especially when cornering.
In its run f lat mode, a PAX system
tire is somewhat noisier than when
it is f ully inf lated, this is normal.
Although your vehicle is capable of
runflatdriving,youshouldalways
observe the f ollowing: If you cannot f ind an Acura dealer or
an authorized Michelin PAX system
dealer where you are driving, call the
PAX help hotline at 1-877-PAXTIRE
(1-877-729-8473).
Driving With a Flat Tire
Important Saf ety Precautions
434
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ÎÎ
The burning of gasoline in your
vehicle’s engine produces several by-
products. Some of these are carbon
monoxide (CO), oxides of nitrogen
(NOx), and hydrocarbons (HC).
Gasoline evaporating f rom the tank
also produces hydrocarbons. Con-
trolling the production of NOx, CO,
and HC is important to the environ-
ment. Under certain conditions of
sunlight and climate, NOx and HC
react to f orm photochemical ‘‘smog.’’
Carbon monoxide does not contri-
bute to smog creation, but it is a
poisonous gas.
In Canada, Acura vehicles comply
with the Canadian emission
requirements, as specif ied in an
agreement with Environment
Canada, at the time they are
manuf actured.
Your vehicle has a positive
crankcase ventilation system. This
keeps gasses that build up in the
engine’s crankcase f rom going into
the atmosphere. The positive crankcase ventilation valve routes
them from the crankcase back to the
intake manif old. They are then
drawn into the engine and burned.
As gasoline evaporates in the f uel
tank, an evaporative emissions
control canister f illed with charcoal
adsorbs the vapor. It is stored in this
canister while the engine is of f . Af ter
the engine is started and warmed up,
the vapor is drawn into the engine
and burned during driving.
The onboard ref ueling vapor
recovery (ORVR) system captures
the f uel vapors during ref ueling. The
vapors are adsorbed in a canister
f illed with activated carbon. While
driving, the f uel vapors are drawn
into the engine and burned of f .
The United States Clean Air Act
sets standards f or automobile
emissions. It also requires that
automobile manufacturers explain to
owners how their emissions controls
workandwhattodotomaintain
them. This section summarizes how
the emissions controls work.
Scheduled maintenance is on pages
and .
374394
The Clean Air Act
Crankcase Emissions Control
System Evaporative Emissions Control
System
Onboard Ref ueling Vapor
Recovery
Emissions Cont rols
472
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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 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
quality parts may increase the
emissions f rom your vehicle.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more informa-
tion.
The three way catalytic converters
are in the exhaust system. Through
chemical reactions, they convert HC,
CO, and NOx in the engine’s exhaust
to carbon dioxide (CO ), nitrogen
(N ), and water vapor.
2
2
Exhaust Emissions Controls Replacement Parts
PGM-FI System Ignit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Three Way Catalytic Converter
Emissions Cont rols
Technical Inf ormation
473
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The three way catalytic converters
contain precious metals that serve as
catalysts, promoting chemical
reactions to convert the exhaust
gasses without af f ecting the metals.
The catalytic converters are ref erred
to as three-way catalysts, since they
act on HC, CO, and NOx.
Replacement units must be original
Acura parts or their equivalent.
The three way catalytic converters
must operate at a high temperature
for the chemical reactions to take
place. They can set on f ire any
combustible materials that come
near them. Park your vehicle away
f rom 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 converters.
Always use unleaded gasoline.
Even a small amount of leaded
gasoline can contaminate the
catalyst metals, making the three
way catalytic converters
inef f ective.
Have your vehicle diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly.
Keep the engine well maintained.
Three Way Catalytic Converters
474
THREE WAY CATALYTIC CONVERTERSTHREE WAY CATALYTIC CONVERTER
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