On-Board diagnostics (OBD) is a system that is based on sensors and computers in the car to display important information about how to work with your car. In the early period of the OBD took the form of the devices of the cooling system, tachometrów, sensors, oil pressure and fuel level sensors to get basic information about the condition of the vehicle. Currently, the OBD system can talk about everything from the crankshaft and camshaft position, until the pressure in the manifold, to the ignition plugs.
Automated OBD system began to appear on the Internet with models fuel injection Volkswagen already in 1969. These early versions were very simple and oświetliłyby indicator of the accident, if there is a problem, but did not provide any useful diagnostic information about the actual nature of the problem. Later, in the early 80-ies of General Motors has begun to implement computerized link Assembly line diagnostic (ALDL), which was able to read error codes. The new system and the OBD2 scanners use digital communication port, which is based on a series of diagnostic fault codes that identificeret problems, so it can quickly find and fix.
In 1991, the Council of the California Air Resources (CARB) introduced new rules that require every new car, owned a OBD1 system. These initial systems were not standardized, and every car manufacturer used their own connectors and transmission protocols. In 1994. Association of Automotive Engineers (SAE) zaleciło standardized connector and communication Protocol for all OBD systems, which became what is now known as OBD2. At the same time, CARB required that every car produced in 1996. And later was equipped with the standard OBD2 system, and the government of the United States followed by nationwide standards. The European Union sets norms OBD2 in October 1998.
How to use OBD2 scanner
The use of OBD2 scanner is actually quite simple and requires no mechanical knowledge. This is because the OBD2 scanners do not correct the problems , define them so that You or a mechanic can fix them without spending time trying to discover what it is not. The OBD2 scanners are just one diagnostic tool. Think about how the visit to the doctor by car.
The first step when using scanner OBD2 diagnostic connector or data link of the vehicle (DLC). It’s a little triangular connector 16-pin connector, which is similar to the old monitor of your computer, and printer ports. This files most often located under the left hand instrument panel near the steering column. Once you found plug the OBD2 scanner, it may be cable connected to the scanner or a separate device that wirelessly transmits information, it can initiate communications with on-Board computers. Will appear a message like “establishing connection with”, or “search Protocol”. If your screen is not illuminated with any news
Then you must specify information about the vehicle, which may include the make and model, VIN number and engine type. Each scanner requires different information depending on the device model and manufacturer. After connecting the scanner, enter information about the vehicle and its launch, you can start searching for the fault codes. Overview scanner window until you see the message “fault codes” or “cheats”. You can or not, you are free to select specific systems such as transmission, brakes, transmission, etc. If Yes, select the system you want to scan, and then you will get a code. If you do not have the ability to test systems, the scanner will immediately show you the error code.
Understanding OBD2 codes
The use of OBD2 scanner is only the first step. Then you must learn to read the code that is presented. Appears active code or backup code . Active code warns about the continuing vulnerability test lamp engine. Backup code means that the OBD2 scan over the action of an emission control system once, and if again fails, the light engine will burn. At the moment the fault becomes active code.
All displayed fault codes starts with one of four letters. “P” refers to powertrain codes and includes the layout of the emissions, ignition system, fuel system, gearbox and engine. “B” in relation to the body and includes a seat mounting, seat belts, airbags and others. “C” refers to the chassis and includes the axles, brakes, the pressure in the wheels, suspension, etc. “” refers to network and other problems associated with communication.
The second digit indicates whether this is a standard code standard OBD2, or is it the producer’s specification. 0 means that common, and 1 means that the specific manufacturer. The remaining numbers indicate what problem you faced in the car. Because there are literally thousands of error codes , nobody will have them all memorized, and the next step will be to familiarize with the list of OBD2 codes to see what is wrong with your car.