2000 Acura RL 3.5 Owner's Manual

294

Technica
l Informatio n

The diagrams in this section give you the dimensions and capacities of
your Acura, and the locations of theidentification numbers. The explana-
tions of several electronic and
mechanical systems on your Acura are for the more technically-oriented
owner. Identification Numbers................. 296
Specifications................................. 298
Vehicle Stability Assist (VSA) System......................................... 300
DOT Tire Quality Grading
(U.S. Cars).............................. 301
Treadwear.................................. 301
Traction....................................... 301
Temperature.............................. 302
Oxygenated Fuels.......................... 303
Driving in Foreign Countries....... 304 Emissions Controls........................ 305
The Clean Air Act...................... 305
Crankcase Emissions Control System..................................... 305
Evaporative Emissions Control System..................................... 305
Onboard Refueling Vapor Recovery................................. 305
Exhaust Emissions Controls.... 306 PGM-FI System..................... 306
Ignition Timing ControlSystem................................. 306
Exhaust Gas Recirculation (EGR) System.................... 306
Three Way Catalytic Converter............................ 306
Replacement Parts..................... 306
Three Way Catalytic Converter... 307

Technical Informatio n

Identificatio
n Number s

Your car has several identifying numbers located in various places.
The Vehicle Identification Number (VIN) is the 17-digit number your
Acura dealer uses to register your car for warranty purposes. It is also
necessary for licensing and insuring
your car. The easiest place to find the VIN is on a plate fastened to the
top of the dashboard. You can see it
by looking through the windshield on the driver's side. It is also on theCertification label attached to the
driver's doorjamb, and is stamped on
the engine compartment bulkhead.
The VIN is also provided in bar code on the Certification label.

Technica l Informatio n
VEHICL
E IDENTIFICATIO N NUMBE R
CERTIFICATIO N LABE L

Identificatio
n Number s

The Engine Number is stamped into the engine block. It is on the front
left, below the valve cover.
The Transmission Number is on a label on top of the transmission.

Technical Informatio n
TRANSMISSIO
N NUMBE R

ENGIN E NUMBE R

Specification
s

* 1 : Including the coolant in the reserve tank and that remaining in the

engine.

Reserve tank capacity:

0.172 US gal (0.65 l , 0.143 Imp gal)

* 2 : Excluding the oil remaining in the engine.

Technica l Informatio n

Specification
s

Technica l Informatio n

page 291

page 290 page 234

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

DO
T Tir e Qualit y Gradin g (U.S . Cars )
The tires on your car meet all U.S. Federal Safety Requirements. All
tires are also graded for treadwear,
traction, and temperature perform- ance according to Department of
Transportation (DOT) standards.
The following explains these
gradings.

Unifor m Tir e Qualit y Gradin g

Quality grades can be found where
applicable on the tire sidewall
between the tread shoulder and the
maximum section width. For
example:

Treadwea r 20 0

Tractio n A A

Temperatur e A
Treadwea
r

The treadwear grade is a compara- tive rating based on the wear rate of
the tire when tested under controlled
conditions on a specified government
test course. For example, a tire
graded 150 would wear one and one
half (1-1/2) times as well on the
government course as a tire graded 100. The relative performance of
tires depends upon the actual condi-
tions of their use, however, and may depart significantly from the norm
due to variations in driving habits,
service practices, and differences in
road characteristics and climate.
Tractio
n

The traction grades, from highest to lowest, are AA, A, B, and C. Those
grades represent the tire's ability tostop on wet pavement as measured
under controlled conditions onspecified government test surfaces
of asphalt and concrete. A tire
marked C may have poor traction
performance.
Warning: The traction grade assigned to this tire is based onstraight-ahead braking traction tests,
and does not include acceleration,
cornering, hydroplaning, or peak
traction characteristics.

Technical Informatio n