The computer or ECM [electronic control module] or ECU[electronic control unit] is designed to manage the fuel system, ignition system, and depending on the design, it also manages the automatic transmission as well as turning on the air conditioning. The computer is programmed to collect information and make about 11,000 decisions every minute. It may also store fault codes for the technician to decipher and rectify problems as required.
THINGS TO LOOK FOR
The computer is located in a cool ...