What is an OBDII connector in a car?

Owners of ECM cars are often confronted with such definitions, as: OBD connector, computer diagnostics of the car via OBDII, checking and scanning engine errors by OBD. However, not everyone knows, which means the presence of this system in the car, as well as why you need OBD in the car. Let's take a closer look, what is the OBD system, namely OBDII.

Let's start with that, that OBD (On board diagnostics, from English. Onboard diagnostics) requires a special diagnostic connector. This solution is required to connect the scanner, laptop or smartphone to the OBD system. The very presence of OBD in the car means the possibility of self-diagnosis of the vehicle, and also allows you to read certain information from different onboard systems: ECU engine, Airbag control units, ABS system, etc.. In other words, OBDs allow you to check the status of various systems.

This self-diagnosis appeared in the United States, it happened a long time ago (since the early 80's). The main task of implementation was the struggle for the environment, that is, control over the composition of exhaust gases and the serviceability of systems, which reduced exhaust toxicity. The first versions were only able to determine the presence or absence of problems, without localizing the problem itself. Let's add, that initially each car manufacturer had its own OBD-I diagnostic connector standard and diagnostic equipment required to read data, which significantly complicated the inspection of vehicles of different brands within one car service.