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.
Tire Tech Information - Tread Depth - Why Too Little is Never Enough. â¦1.6mm) of remaining tread depth. U.S. law requires tires to have easy-to-see Tread Wear Indicator bars running from one side of their tread design to the other when the tire's tread has worn down to the minimum legal limit of 2/32 inch. However, in spite of the legal minimums, Tire Rack recommendsâ¦.