Read automotive fault code should pay attention to the following points

Clear fault codes correctly
Automobile troubleshooting, need to clear the fault code. For fault code clear, should be strictly in accordance with the provisions of specific models of fault code cleanup method, don't simply use removed battery negative strap to erase fault code. Otherwise, may result in the following two aspects: first, the trouble of some models to control the computer lost "experience memory", we know, control computer some car with automatic memory function, remove the battery negative strap, will automatically clear the storage engine operating experience with data in memory, thereby the automobile repair after a fairly long period of time performance is not good, or running after a period, and to reproduce the fault code has been removed; second, will cause the loss of some functions, such as audio lock is one of the most common examples. At this time, you need to decrypt the audio system in more cumbersome procedures, working to restore the audio system.

Suitable temperature control
Read the code, the engine to normal operating temperature can be used only for the self diagnostic test, especially the water temperature at 85 ～ 95 ℃ when reading the code is the most reliable. Otherwise, in the reading process, sometimes a non fault codes, such as temperature, exhaust gas recirculation, idling bad fault codes. It often makes people mistakenly think that electronic control system fault self diagnosis system of many that or malfunction.

Correct reading order
The electronic control system of static code reading and dynamic code reading, should pay attention to order two code reading and the conversion process, otherwise it will cause the fault code reading failure, many models have strict procedural requirements on the two kinds of code conversion. First of all, you must first read the static code, if static code after reading, the system does not output code "11" normal fault code, go read dynamic code, can appear the fault distortion, resulting in repair of the miscarriage of justice. And it often causes a kind of illusion to repair personnel, if fault code useless like. At the same time, should pay attention to, before reading dynamic code, the general need to remove static code. In the process of dynamic code self diagnosis before, should remove the read static code when connected to the diagnostic socket on the bridge, and then clear the static fault code, then start to accelerate to 2000r/min engine and, at least 2min, so as to enable the engine to normal operating temperature, and then close the ignition switch, after waiting 10s the self the diagnosis of joint inter connected, and start the engine again, this time to display fault code is the dynamic mode of fault codes.

Note that after reading the memory correction
Through the electronic control car for read code, clear code, and troubleshooting, if the car's acceleration performance declined, sometimes a normal phenomenon, but requires maintenance personnel to the control computer ECU correct driving position memory correction. In other words, is to restore control of the computer of the car's current position memory function. As long as the vehicle in a normal car, continuously repeated start, driving, turn off, up to a certain number of times, the relative performance cars will gradually be restored.

Say that buying a car easy, using a car difficult. Find more car tools like truck repair tools and b800 from www.vtoolshop.com. There also offer the key programmers and other parts which can help more.