Acura RLX Sport Hybrid 2020 Owner's Manual page 78

MAINTENANCE
Temperature A
All passenger car tires must conform to Federal Safety Requirements in
addition to these grades.
Treadwear
n
The treadwear grade is a comparative 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 conditions 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.
Traction
n
The traction grades, from highest to lowest, are AA, A, B, and C. Those
grades represent the tire's ability to stop on wet pavement as measured
under controlled conditions on specified 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 on straight-
ahead braking traction tests, and does not include acceleration, cornering,
hydroplaning, or peak traction characteristics.
n Temperature
The temperature grades are A (the highest), B, and C, representing the
tire's resistance to the generation of heat and its ability to dissipate heat
when tested under controlled conditions on a specified indoor laboratory
test wheel. Sustained high temperature can cause the material of the tire
to degenerate and reduce tire life, and excessive temperature can lead to
sudden tire failure. The grade C corresponds to a level of performance
which all passenger car tire must meet under the Federal Motor Vehicle
Safety Standard No. 109. Grades B and A represent higher levels of
performance on the laboratory test wheel than the minimum required by
law.
WARNING: The temperature grade for this tire is established for a tire
that is properly inflated and not overloaded. Excessive speed,
underinflation, or excessive loading, either separately or in combination,
can cause heat buildup and possible tire failure.
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Testing of Readiness Codes
Your vehicle has readiness codes as part of the onboard self-diagnostic
system. Some states use these codes for testing to verify whether your
vehicle's emissions components are working properly. The codes may not be
read if you go through the testing just after the battery has gone dead or been
disconnected.
To check if they are set, set the power mode to ON without starting the
engine. The malfunction indicator lamp will come on for several seconds. If it
goes off, the readiness codes are set. If it blinks five times, the readiness codes
are not set.
If you are required to have your vehicle tested before the readiness codes are
set, prepare the vehicle for retesting by doing the following:
1. Fill the gas tank to approximately 3/4 full.
2. Park the vehicle and leave the power system off for 6 hours or more.
3. Make sure the ambient temperature is between 40°F and 95°F (4°C and
35°C).
4. Turn the power system on.
5. Select a nearby, lightly traveled major highway where you can maintain a
speed of 50 mph (80 km/h) for at least 20 minutes. Drive on the highway
in DRIVE (D) . Do not use cruise control. When traffic allows, drive for 90
seconds without moving the accelerator pedal. (Vehicle speed may vary
slightly; this is okay.) If you cannot do this for a continuous 90 seconds
because of traffic conditions, drive for at least 30 seconds, then repeat it
two more times (for a total of 90 seconds).
6. Drive in city or suburban traffic for at least 10 minutes. When traffic
conditions allow, let the vehicle coast for several seconds without using
the accelerator pedal or the brake pedal.
7. Park the vehicle and leave the power system off for 40 minutes .
The readiness codes are erased when the battery is disconnected. The codes
are set again only after several days of driving under a variety of conditions.
If a testing facility determines that the readiness codes are not set, you may be
requested to return at a later date to complete the test or see your dealer.
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