Electrical Engineering Learning Network: www.dgdqw.com Follow the official WeChat account of the Electrical Engineering Learning Network “Electrical Engineering and Electronics” to gain more experience and knowledge. The multimeter is the primary troubleshooting tool for electricians. Once accustomed to it, even when a fault occurs that could be diagnosed without a multimeter, one may feel uneasy … Read more
……….. Comprehensive instruments are diagnostic devices that integrate multiple testing functions into one, making it more convenient for on-site fault diagnosis with multi-parameter detection. Currently, there are mainly six combinations of testing functions for such instruments: ① combination of pressure and flow; ② combination of pressure, flow, and temperature; ③ combination of pressure, flow, and … Read more
May 2020 Introduction to the Equipment The pico automotive oscilloscope perfectly combines hardware and software, making it one of the most advanced automotive fault diagnostic devices available today. As shown in Figure 1, it mainly consists of the oscilloscope host (such as pico scope 4425, pico scope 4823, etc.), diagnostic software (pico scope 6 automotive … Read more
(Warm reminder: The article is quite long, totaling 3300 words; it is recommended to bookmark it for later reading.) During automobile maintenance, oscilloscopes are extremely useful, especially when performing non-disassembly diagnostics, troubleshooting analysis, and bus diagnostics, making them indispensable. When combined with other diagnostic tools (such as diagnostic computers, test lamps, multimeters, etc.), they can … Read more
Master Truck Repair ★ Learn Circuit Repair Series Course ★ 01 Lecture 1 – Detailed Practical Explanation 02 Lecture 2 – Computer Boards, Pins, Circuit Diagrams 03 Lecture 3 – ECU Power Communication Jumper and Car Diagnostic Port Definition 04 Lecture 4 – ECU Main Relay and Power Supply Module Explanation 05 Lecture 5 – … Read more
2017, Happy New Year! This Issue Guide: Many mechanics often ask me why the motor won’t start and there’s no response when trying to start the car. When I encounter such issues, I honestly feel reluctant, especially when there are no fault codes. This kind of problem is systemic and involves various aspects of the … Read more
Author | Diagnostic Expert The ECU is the brain of our vehicle. When a fault occurs, the ECU will report the corresponding fault code, allowing technicians to diagnose and repair the issue. However, some fault codes that affect the normal operation of the vehicle cannot be cleared even after repairs, causing confusion and frustration for … Read more
As people’s demands for automotive safety, comfort, exhaust emissions, and fuel economy become increasingly stringent, the amount of information exchanged between control units is growing, and the number of sensors and wires is rapidly increasing, making it more difficult to troubleshoot and repair. To ensure that the electronic systems in vehicles remain operational without taking … Read more
Detection Methods for CAN Bus ① Before checking the data bus system, ensure that all electronic control units (ECUs) connected to the data bus have no functional faults. Functional faults refer to those that do not directly affect the data bus system but will impact the functional process of a certain system. For example, if … Read more
When there are issues with the CAN bus, it is often accompanied by various faults, such as abnormal dashboard displays, the vehicle not starting, or not being able to turn off after starting, etc. We will mainly introduce the eight common types of CAN bus faults and specific troubleshooting methods. Below is the main text. … Read more