2000 Acura RL sensor

Corrosion
Protectio n

Two factors normally contribute to causing corrosion in your car:
1. Moisture trapped in body cavities. Dirt and road salt that collects in
hollows on the underside of the
vehicle stays damp, promoting corrosion in that area.
2. Removal of paint and protective coatings from the exterior and
underside of the car. Many corrosion-preventive measures
are built into your Acura. You can
help keep your car from corroding
by performing some simple periodic

maintenance:
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 floor coverings for
dampness. Carpeting and floor
mats may remain damp for a long
time, especially in winter. This dampness can eventually cause
the floor panels to corrode. Use a high-pressure spray to clean
the underside of your car. 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 carefulof the ABS wheel sensors and
wiring at each wheel. Have the corrosion-preventive
coatings on the underside of your
car inspected and repaired
periodically.

Appearanc e Car e

Vehicl
e Stabilit y Assis t (VSA ) Syste m

The Vehicle Stability Assist system (VSA) monitors the car's actions
during straight-line acceleration and
cornering behavior. It reduces
engine power and applies selective
braking if it senses any loss of
traction.
Controllin g Tractio n Durin g
Straight-lin e Acceleratio n
If one drive wheel is turning faster
than the other, or both drive wheels
are turning faster than the non- driven wheels, VSA senses
wheelspin. It reduces engine power and applies braking at the wheels as
necessary to increase traction.
To do this, VSA monitors the pulse frequencies from the wheel speed sensors. It also uses information
from the steering wheel angle sensor
and the lateral acceleration sensor to determine if the car is accelerating in
a straight line or if it is cornering.
VSA can then calculate how much wheelspin, if any, to allow. It signals
the ECU to reduce fuel flow andretard ignition timing. This reduces
available engine power. The ECU
will also apply braking at the wheels as necessary. When wheelspin has
been controlled, braking and engine
control return to normal.
Controllin g Tractio n Durin g
Cornerin g
VSA monitors steering input and the car's expected response to that input.
VSA's yaw rate sensor measures the car's actual cornering behavior. If VSA determines that the car is
turning more or less than expected,
the system reduces engine power
and applies braking at the
appropriate wheel to try and
maintain adequate traction during
cornering.
VSA uses the same wheel speed sensor assemblies as the ABS.
Additional sensors measure steering wheel angle, lateral acceleration, and
yaw rate.
The control unit monitors the VSA circuitry while driving. If it senses a
problem, it turns off the system and illuminates the VSA System
Indicator on the instrument panel.
Technica l Informatio n

Drivin
g in Foreig n Countrie s

If you are planning to take your
Acura outside the U.S. or Canada, contact the tourist bureaus in the
areas you will be traveling in to findout about the availability of unleaded
gasoline with the proper octane

rating.

If unleaded gasoline is not available,
be aware that using leaded gasoline
in your Acura will affect perfor-
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 car back into compliance will require the replace-
ment of several components, such as
the oxygen sensors and the three
way catalytic converter. These re-
placements are not covered under
warranty.
Technica l Informatio n

Emission
s Control s

Exhaus t Emission s Control s
The exhaust emissions controls include four systems: PGM-FI,
Ignition Timing Control, ExhaustGas 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 areseparate from the crankcase and
evaporative emissions control

systems.

PGM-FI System

The PGM-FI System uses sequential multiport fuel 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 fuel to inject under all operat-
ing conditions. Ignition Timing Control System
This system constantly adjusts the ignition timing, reducing the amountof HC, CO and NOx produced.
Exhaust Gas Recirculation (EGR)
System

The Exhaust Gas Recirculation (EGR) system takes some of the
exhaust gas and routes it back into
the intake manifold. Adding exhaust
gas to the air/fuel mixture reduces
the amount of NOx produced when
the fuel is burned.
Three Way Catalytic Converter
The three way catalytic converter is in the exhaust system. Throughchemical reactions, it converts HC,
CO, and NOx in the engine's exhaust
to carbon dioxide (CO 2), dinitrogen
(N 2), and water vapor. Replacemen
t Part s

The emissions control systems are designed and certified 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 newGenuine Acura replacement parts or
their equivalent for repairs. Using
lower quality parts may increase the emissions from your car.
The emissions control systems are covered by warranties separate from
the rest of your car. Read your
warranty manual for more informa-
tion.

Technica l Informatio n