The ECU, short for Electronic Control Unit, refers to all electronic control systems in a car. With the increasing number of electronic components in new energy and autonomous vehicles, the wiring has become more complex. Currently, data exchange between multiple ECUs in a vehicle is connected via the CAN bus, forming a network system for … Read more
I have always been curious about what the warning lights on a car dashboard mean, when they appear, and when they disappear. Over the past two years, I have gained some knowledge in this area, and I would like to share it with interested friends. This article will introduce the automotive controller (ECU) fault diagnosis … Read more
Fault Phenomenon A 2017 Mercedes-Benz V260L vehicle, equipped with a 2.0T engine, has a navigation system with version number NTG5.2 of the COMAND (Cockpit Management and Data) system, with a total mileage of approximately 35,000 km. The owner reports that the COMAND display is black, with no display or sound, and all the system’s switch … Read more
Industrial robots are the “crown jewel” of China’s manufacturing industry. In the research and manufacturing of core components for robots, China has approached the international top level in many areas. However, some core technologies still fail to meet the application needs of complex high-end fields. Issues such as unclear competition mechanisms between the transmission precision … Read more
In recent years, with the development of society, PLC (Programmable Logic Controller) has been widely used in industrial production, and the requirements for its use by technical personnel have been increasing year by year. Therefore, the requirements for the normal and stable operation of the system are also getting higher. The Programmable Logic Controller (PLC) … Read more
Siemens All-Subject + TIA Portal + EPLAN Electrical Drawing Video Recordings for Sale at Low Prices! Chuangkong Education Siemens All-Subject Class Course Introduction Many people encounter situations where the touchscreen cannot be used due to faults while using it. This is mainly because the touchscreen is a relatively precise device, and due to its nature … Read more
When the CAN bus malfunctions or data transmission is abnormal, various strange fault phenomena often occur, such as abnormal dashboard displays, inability to start the vehicle, failure to turn off after starting, decreased vehicle performance, and loss of certain electronic control system functions. This is because relevant data or information is transmitted through the CAN … Read more
4. Short Circuit of CAN L to Ground When a short circuit occurs between CAN L and ground, due to the fault tolerance characteristics of the CAN bus, the entire CAN network may be unable to communicate or generate related fault codes. However, for certain vehicle models, such as Haima, the fault tolerance characteristics of … Read more
To begin with, let’s recall what the normal operating voltages of CAN_H and CAN_L are. When there are issues with the CAN bus, it is often accompanied by various faults, such as abnormal dashboard displays, the vehicle failing to start, or failing to turn off after starting, etc. We will mainly introduce the 8 common … Read more
5. Short Circuit of CAN L to Power (Positive) When a short circuit occurs between CAN L and the power (positive), due to the fault tolerance characteristics of the CAN bus, the entire CAN network may be unable to communicate or generate related fault codes. Because of the short circuit of CAN L to the … Read more