Operation CHARM: Car repair manuals for everyone.

General System Description


These vehicles are equipped with a PGM-FI Electronic Control Unit (ECU). The Electronic Control Unit (ECU) controls all phases of engine operation. In order to accomplish this control, the ECU relies on the input from a variety of engine operation sensors. It then compares these input signals with those stored in memory to determine what steps should be taken to achieve maximum performance, maximum fuel economy, and meet all emission control standards. The ECU then outputs the necessary signals to the fuel system, ignition system, air control system, plus the emission control systems. The end result is a very reliable vehicle which requires a minimum of maintenance while delivering good smooth engine performance.