In principle, the suitcase and connectivity
Regarding the principle, the computer continuously receives information from the various sensors on the vehicle. It has a range of correct value beyond this range or the total absence of signal, it considers the item out of service. It therefore causes the indicator light diagnostic. It can also compare information from different sensors and see an anomaly.
Suitcase "diag" allows connecting to the diagnostic socket as OBD 2, read the findings of abnormalities. These jacks allow reprogramming of the car, but require more sophisticated car diagnostic tools. The software interface translates the error code in French to facilitate understanding for the user.
These bags often come with auto assorted plug and adapter to connect to all systems existents. Lors playback, the user can know if the fault is transient (time X appeared and disappeared) or permanent (present on vehicle at the time of diagnosis).
How to get autocom
cdp pro
The ideal case is the manufacturer but it is very difficult to get one. Nevertheless, there are on the market a variety of bags for universal car. There is a choice between acquiring the USB cable and connect it to a PC which has installed a software interface, or directly buy a box portable to read the fault codes.
Unfortunately, the majority of these cases and interface has a fairly limited range of actions and will mainly as reading and erasing fault codes.
It is quite understandable that access further functions such as reprogramming key and disabling the immobilizer are difficult to obtain due to the misuse of it (car theft).
It is this kind of tool obd2china.com for an affordable price, however, but it is possible to find less expensive models as a reader OBD II launch x431 diagun.