Service Manual Toyota Technical Training Introduction To Engine Control Systems Lessons

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Section 1 Introduction to Engine Control Systems T852f005 Lesson Objectives 1. Identify major control systems/components 2. Locate needed engine control systems service information 3. Familiar with engine control systems terms Engine Control Systems I - Course 852 Section 1 TOYOTA Technical Training Section 1 Introduction to Engine Control Systems Basic Engine The need to achieve high power output, high fuel economy, and the Operation lowest amount of emission gases from today’s engines has led to very sophisticated engine control systems. A computer, referred to as an Engine Control Module (ECM), manages a variety of engine systems. These systems are basically divided into the following areas: • Air induction systems. • Fuel system. • Ignition system. • Exhaust/Emission control system. All the above and other systems are controlled or sensed by the ECM. The ECM with its sensors and actuators is often referred to as the electronic control system. It is important to keep in mind while diagnosing engine concerns that the fundamentals of engine operation (correct mixture of air and fuel sufficiently compressed and ignited at the proper time) are not different. The following is an…