Nissan Sentra B18 (2020-2025) Owner's Manual: Uniform tire quality grading
DOT (Department of Transportation) Quality Grades apply to all passenger car tires and are intended to provide comparative information in addition to meeting federal safety requirements.
Where applicable, these quality grades are molded into the tire sidewall between the tread shoulder and the maximum section width. Example grading format:
Treadwear 200 Traction AA Temperature A
Treadwear
The treadwear grade is a comparative rating based on the rate of wear under controlled testing conditions on a specified government test course. For example, a tire graded 150 would wear one and one-half (1½) times as long on the test course as a tire graded 100.
Actual tire performance may vary significantly depending on driving habits, road conditions, maintenance practices, and regional climate differences.
Traction AA, A, B and C
Traction grades, from highest to lowest, are AA, A, B, and C. These grades represent the tire’s ability to stop on wet pavement under controlled conditions on specified asphalt and concrete test surfaces. A tire graded C may exhibit poor traction performance.
WARNING
The traction grade is based solely on straight-line braking tests and does not account for acceleration, cornering, hydroplaning, or peak traction capabilities.
Temperature A, B and C
Temperature grades indicate a tire’s resistance to heat buildup and its ability to dissipate heat when tested under controlled laboratory conditions. Grade A represents the highest level of performance, followed by B and C. Sustained excessive heat can degrade tire materials, reduce tire life, and potentially cause sudden tire failure.
Grade C meets the minimum performance level required under Federal Motor Vehicle Safety Standard No. 109, while grades B and A exceed the minimum requirements.
WARNING
The temperature grade is established for a properly inflated and non- overloaded tire. Excessive speed, under-inflation, or overloading—either individually or in combination—can cause excessive heat buildup and may result in tire failure.
Flat towing your vehicle
Flat towing
Towing a vehicle with all four wheels on the ground is commonly referred to as
flat towing, dinghy towing, or “four-down” towing. This method is sometimes used
when towing a vehic ...
Reporting safety defects
For USA
If you believe that your Nissan Sentra has a defect that could cause a crash
or could result in serious injury or death, you should immediately notify the National
Highway Traffic Safety ...
Other materials:
How to erase permanent DTC
Description
OUTLINE
When a DTC is stored in ECM
When a DTC is stored in ECM and MIL is ON, a permanent DTC is erased with MIL
shutoff if the same malfunction
is not detected after performing the driving pattern for MIL shutoff three times
in a raw.
*1: When the same malfunction is detec ...
Making a call
To make a call, follow the procedure below:
Press the button on the
control panel.
The “Phone” screen will appear on the display.
Select one of the following options to make a
call:
“Phonebook”: Select the name from an entry
stored in the vehicle phonebook.
“Call ...
Diagnosis System (combination Meter)
On Board Diagnosis Function
On Board Diagnosis Function
ON BOARD DIAGNOSIS
The following meter functions can be checked
during Combination Meter Self-Diagnosis Mode:
Pointer sweep of speedometer, tachometer and
gauges.
Illumination of LCD color patter ...
