The OBD-II is a type of computer that collects information on the vehicle’s speed, mileage, emissions, and other data that are related to the car. The check engine unit and the OBD-II are connected. The role of the check engine unit is to illuminate whenever there is a problem in the system. Depending on the issue in the system the light will go away entirely, flash, or stay on. The mechanics usually use the scan tools to understand the diagnostic trouble codes.
The onboard diagnostics can be defined as the ability of the vehicle to record and send the problems that have occurred or may occur in the system. One of its advantages is that it can detect problems long before they occur. This, therefore, helps the vehicle owner to take proactive steps in fixing the problem; before it becomes worse. Some of the signs that show a car is faulty like heavy emissions, low-fuel economy, and low-performance can be avoided if the OBD is used.
One of the most common queries is how the OBD works. Well the OBD stores the diagnostic trouble codes commonly referred to as the DTC in the system. These codes are not standard because we have various manufacturers in various countries who use slightly different codes. Anyone in possession of the tool and connects to the port can read the diagnostic trouble codes and identify the issues with the vehicle. For instance, issues to do with transmission, emission controls, and air metering just but to mention a few can be easily identified by the DTC codes.
The other name for the port is the diagnostic connector which usually comes in two colors: black or white. It is generally placed above the brake pedal and behind the dashboard. It has available spaces for 16 pins; however, not all the 16 pins must be used. The positions of the pin vary and depend on the signal protocol and supported by the car. The law of the United States, for example, require that the driver must quickly reach the port. You can use the port with anything that is compatible with the OBD-II or the scan tool. It only needs the user to plug into the port, and all the information about the vehicle will be received.