The brief introduction of the second-generation on-board diagnostic system-OBD II

USA - As the type of the OBD auto diagnostic systems from world's major automobile plant are different with the different types of engine management system in each car, it has caused the greater inconvenience to the after-sales service and maintenance for cars. The most important is that the OBD such as the x431 diagun and gm mdi cannot self-test whether it working state could reach the factory technical requirements and this reason has making the car do not meet the original technical requirements after the repairing for them.

This phenomenon is very common in China which has seriously affecting the reliability and life of the car. The engineer from the auto diagnostic tools manufacturer which name is GO2OBD has told us that this board diagnostic system is also called the first-generation board diagnostic system. If you want to have more information about this, you could search the website http://www.go2obd.com/ to find everything you want.Since 1996, the major automobile manufacturers had begun to equip the unified second-generation on-board diagnostic system which we also call it OBD II.

The creation of OBD II is to compensate for the shortcoming of OBD I. nowadays, most of the auto diagnostic tools such as the gm mdi, autel maxiscan and tacho pro are all applied with the OBD II system.Although the OBD II technology is still relatively new and yet not to have a big impact on the after-sales and maintenance market of the car, in a word, this impact would be bound to happen. Government had warned to the failure of the emission control system. And then, all of the model cars in 1996 and light vehicles shall be equipped with OBD II. However, the first time of the first application of the OBD II is in 1994.

Now, the system of OBD II is very common equipment in our cars and the auto diagnostic systems such as the autocom cdp, bmw icom and vag k can are also very common.The difference between the OBD II and the former self-diagnostic system is its stringent emission targeted. In other words, when the vehicle emissions of HC, CO and NOx or fuel evaporative emission amount has become more than 1.5 times of the standard FTP, the MIL lamp would be lit.

This includes overall increasing of the HC emissions which caused by the random misfire engine; the efficiency of the catalytic converter is decreased to a certain limit under air leakage; the system detects sealed fuel system; the rising of the NOx emissions caused by the failure of the EGR system; In other words, even when the vehicle seems to be running normally without any real exercise performance issues, the MIL lamp will also be lit.

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URL: http://www.go2obd.com/