With the continuous growth and spread of engine electronic control technology, you have become more and more aware of OBD diagnosis. Take the engine fault light on the dashboard of the car. In vehicles with electronic control engines, every time the ignition switch is turned on, this light will always light up for a few seconds. Within this time, the engine electronic control system will quickly complete the self-check, and the lamp will burn after the self-check is not successful. If the light turns on suddenly while the vehicle is driving, it is declared that the vehicle electronic control system is faulty and needs to be tested in real time, and this fault usually requires the use of a public diagnostic computer, adjacent to the OBD diagnostic interface on the car to read the fault Code and data stream, ability to perform fault diagnosis and analysis. Then this OBD and fault warning light Is it just a diagnostic interface to facilitate vehicle fault diagnosis and repair? If this were to be understood, it would be wrong. What is OBD? OBD refers to the on-board diagnostic (OBD) system for emission control. It must have the function of identifying areas that are likely to be faulty, and store the information in the memory of the electronic control unit in the form of a fault code. OBD is a system that monitors emission-related functions and components using hardware or software, and prompts the driver to implement response inspection and maintenance in the form of MIL lights and DTC fault codes. The final inspection is to meet environmental protection regulations. A system for whether vehicle emissions can exceed the standard. The common probation of OBD mainly has the following points 1. Detect the faults of the parts and systems at any time to ensure that the emissions from the vehicle during the use of lifecycles do not exceed the requirements of the OBD regulations 2. When a related emission problem is detected, the OBD system can use the MIL light on the dashboard to give an alarm. 3. Faulty vehicles can be repaired in real time to reduce vehicle emissions. 4. The OBD system helps technicians diagnose quickly, repair symptomatically, and reduce maintenance costs. When countries perform OBD are different, At the same time, OBD has different versions, The version difference also differs in its functionality. ●The first generation of OBD-many unsatisfactory The start date of the OBD will be back to the California Department of Atmospheric Resources (CARB) in 1988 and later on the emission regulations for California cars. Major automobile manufacturers adopt their own self-designed diagnostic sockets or self-defined diagnostic codes, which brings great convenience to maintenance. ●The second generation of OBD-unified standards, perfect monitoring field The California Department of Atmospheric Resources (CARB) implemented the LEV emission regulations in 1996 while leading the introduction of OBDII. The European Community also implemented the European No. 3 emission regulations in 2000, requesting all new cars and light trucks (under 2.5 tons). ) Necessary equipment EOBD system. ●The third generation of OBD-more comprehensive and strict monitoring After 2004, the OBD technique in developed countries implemented the third stage. The OBD Ⅲ system mainly uses a small vehicle-mounted wireless transceiver system. Through the wireless cellular communication, satellite communication or GPS system, the vehicle's body number, fault code and vehicle location and other information are actively announced to the management department. The management department will follow the vehicle emission class The instructions to withdraw include maintenance advocacy, time limit for handling emissions performance, etc. to sum up: As environmental protection requests become more stringent, the importance of OBD has become increasingly prominent. Its introduction is closely related to the four secondary aspects of utilization, fuel characteristics, driving customs, and vehicle conditions. Shortcomings in any of these links will affect the expansion and utilization of OBD. At the same time, the following relevant supporting levels are required to respond to progress: fuel quality, vehicle maintenance skills, consistency of relevant parts, improvement of driver standards, improvement of OBD skills and support from all aspects of society.
