What does ECU mean and what are its functions?

[OPeyton]

ECU in automobiles refers to the onboard computer. ECU (Electronic-Control-Unit), also known as "vehicle computer" or "onboard computer". In terms of its purpose, it is a specialized microcomputer controller for automobiles. Like a regular computer, it consists of a microprocessor (MCU), memory (ROM, RAM), input/output interfaces (I/O), analog-to-digital converters (A/D), as well as shaping, driving, and other large-scale integrated circuits. Here are some common causes of ECU damage: 1. During welding repairs on the vehicle frame, the ECU wire connections were not disconnected. During welding repairs on the frame, changes in current can generate extremely high induced electromotive force, which can harm the ECU through the wiring. 2. When the battery is low, using a direct silicon-controlled rectifier (SCR) charger to charge it. The high-order harmonics produced by the SCR circuit can damage the ECU. 3. Alternatively, if the charger voltage is too high, the polarity is reversed, or the ignition switch is turned on or even the generator is started while charging. 4. If maintenance personnel disassemble the ECU without caution, touch the electronic control unit interfaces with their hands, or use a soldering iron without grounding function to solder the CMOS chip of the ECU, it can cause the CMOS chip to be damaged by static electricity. 5. If the positive and negative terminals of the battery are suddenly disconnected while the engine is running, the circuit can generate a very high induced electromotive force, which may cause the internal electronic components of the ECU to be damaged.