Uniform tire quality grading
DOT (Department of Transportation) Quality
Grades: All passenger car tires must conform to
federal safety requirements in addition to these
grades.
Quality grades can be found where applicable on
the tire sidewall between tread shoulder and
maximum section width. For example:
Treadwear 200 ...
Pedal vibration or ABS operation
sound occurs
Diagnosis Procedure
CAUTION:
Under the following conditions, ABS is activated and vibration is felt when
brake pedal is lightly
depressed (just place a foot on it). However, this is normal.
When shifting gears
When driving on slippery road
During cornering at high speed
When passing o ...