Automotive Diagnostics

Overview of the Profibus-DP Communication Protocol

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Overview of the Profibus-DP Communication Protocol

1. Overview PROFIBUS-DP, where DP stands for Decentralized Periphery, is a type of computer electronic component. It features high speed and low cost, used for communication between device-level control systems and decentralized I/O. It, along with PROFIBUS-PA (Process Automation) and PROFIBUS-FMS (Fieldbus Message Specification), constitutes the PROFIBUS standard. 2. Basic Information Specifications The PROFIBUS-DP protocol … Read more

The Internet of Everything | Small Size, Big Uses: Micro Robots Transition from Science Fiction to Reality

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The Internet of Everything | Small Size, Big Uses: Micro Robots Transition from Science Fiction to Reality

Author | Yufei Men Editor | New Story First Published | Global Intelligent Business ▍Image Source: Internet In the internet era, people often use the term “brain hole” to describe some of the strange ideas from netizens. In fact, even before the internet appeared, there were plenty of “brain holes”. For example, the Hollywood movie … Read more

EcuBus-Pro Comprehensive User Guide with PCAN-FD

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EcuBus-Pro Comprehensive User Guide with PCAN-FD

Introduction EcuBus-Pro is an open-source project designed to provide communication protocols and tools for automotive electronic control units (ECUs), enabling developers to interact with vehicle ECUs for diagnostics, debugging, data logging, and performance optimization. It has the following main features: Open-source and free User-friendly interface Cross-platform support (Windows, Linux, MacOS) Multi-hardware compatibility, including PEAK, KVASER, … Read more

Major Upgrade of Yuan Zheng Diagnostic Equipment UI: Optimization of the Diagnostic Process

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Major Upgrade of Yuan Zheng Diagnostic Equipment UI: Optimization of the Diagnostic Process

Yuan Zheng has added two practical features during the diagnostic process: displaying the car voltage and allowing continued diagnostics after Bluetooth reconnection during the diagnostic process. Voltage Display in the Upper Right Corner of the Diagnostic Process During vehicle repairs, technicians often need to connect an external power source to charge the car, to prevent … Read more

PLC Input/Output Not Responding? A Comprehensive 8-Step Troubleshooting Guide

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PLC Input/Output Not Responding? A Comprehensive 8-Step Troubleshooting Guide

The PLC system is like the human nervous system; its inputs and outputs are how it perceives and controls the world. However, sometimes this “nervous system” can encounter issues—buttons not responding, indicator lights not illuminating, motors not turning. These input/output response problems can be frustrating, especially during an emergency shutdown on the production line. Don’t … Read more

Warning on ECU Diagnostic Pitfalls: Is the 0x27 Key Algorithm the ‘Bricking’ Culprit? Discover the Efficiency Doubling Secrets of 0x28 Communication Control, Lessons Learned by Engineers!

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Warning on ECU Diagnostic Pitfalls: Is the 0x27 Key Algorithm the 'Bricking' Culprit? Discover the Efficiency Doubling Secrets of 0x28 Communication Control, Lessons Learned by Engineers!

In automotive electronic diagnostics, secure access (0x27) and communication control (0x28) are two key technologies. The former protects ECU data security, while the latter optimizes communication efficiency. Mastering these is essential for becoming a diagnostic expert! 1. Secure Access (SID 0x27): The ECU’s ‘Password Lock’ Mechanism The ECU stores critical vehicle data (such as program … Read more

Methods for Rapid Diagnosis of ECU Functionality

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Methods for Rapid Diagnosis of ECU Functionality

There are input and output circuits on the ECU hardware, while the software consists of programs and data. The assessment of ECU functionality should focus on these three aspects. Given the numerous pins and functions utilized by the ECU, it is advisable to create a project list and measure each item one by one. Measurement … Read more

Guide to Diagnosing and Repairing ECU Control Anomalies

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Guide to Diagnosing and Repairing ECU Control Anomalies

1. Core Fault Analysis of ECU Anomalies 1. Program Corruption: The “Amnesia” of Digital Neurons Typical Triggers: Unofficial ECU tuning (e.g., aggressive first/second-order program flashing leading to checksum failure) CAN bus signal conflicts (devices occupying diagnostic protocol IDs, such as permanent devices on the OBD interface) OTA upgrade interruptions (voltage fluctuations causing packet loss rate … Read more

Measurement Methods for LIN Bus Using Oscilloscope and Multimeter

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Measurement Methods for LIN Bus Using Oscilloscope and Multimeter

1. Self-Diagnosis of LIN BusWhen performing self-diagnosis on the LIN data bus system, the address code of the LIN master control module must be used. The self-diagnostic data is transmitted from the LIN slave control module to the LIN master control module via the LIN bus. All self-diagnostic functions can be completed on the LIN … Read more

A Handy Trick for Locating Breakpoints in Wires Using a Multimeter

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A Handy Trick for Locating Breakpoints in Wires Using a Multimeter

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