Symptoms of a Bad or Failing ECM-Power Relay. The ECM, or electronic control module, is the computer responsible for controlling all of the engine management functions. It is the central control unit of most vehicles and controls a variety of functions, such as electrical system power distribution, emissions, ignition, and fuel systems.
1 Replace the tire if the top of Abe's head becomes uncovered by any of the grooves.  If your tires are only partially worn, find out how much. Stick a tread-depth gauge (about $5 at auto-parts stores) into each of the grooves on all four tires, as shown in the photo below. Then check how many inches of usable tread remain and match your driving to the tread wear.
TIRES AND WHEELS 3951. New tires have between 9/32 in. and 15/32 in. tread depth. Wear bars (indicators) show up as a bald strip across thetread of the tire when the tread depth gets down to 2/32 in. 2. All tires are assembled by hand from many different materi-als and chemical compounds.