Probing into the ECU circuits of Toyota 4S-FE engine, this paper introduces the working principle and the structure of the engine ECU chips in detail, which can be used to analyse the ECU working condition.

• 对TOYOTA4S－FE发动机电脑的内部电路进行了较完整的探讨，详略介绍了本发动机电脑芯片的工作原理和外部结构，依据此可分析电脑的工作状况