Understanding Toyota 1ZZFE Engine and Emission Control System
This is a picture which illustrates how Toyota 1ZZFE Engine and Emission Control System works. This system adopted technologies such as individual injection system with 4-hole injector, twin O2 sensor system, and knock sensor system for improving its driveability and emission control performance.
DIY Knowing Toyota 1ZZ-FE Engine Control System
The picture below shows the engine control system diagram of this 1ZZ-FE engine, a 1.8 L (1794 cc) version of The Toyota ZZ engine family