How does car diagnostic work?
Since the 1980s, all vehicles are equipped with On-Board Diagnostics or OBD systems. The OBD 1.5 was a partial successor to the earlier technology and was implemented during the mid-1990s.
Later, in 1994, came OBD II, which is the current version used in all vehicles.
The OBD primarily consists of an electronic control unit (ECU) that is connected with several sensors and actuators connecting different parts of a car. These sensors and actuators relay information about the vehicle’s condition to the ECU.
Any faults in a car can be diagnosed through the OBD by reading the outputs.
To do that, technicians use a scanner tool by connecting the OBD through a Diagnostic Link Connector (DLC).
An OBD communicates with the scanner by sending Diagnostic Trouble Codes or DTCs. These codes, when read by our technicians, can be used to identify the source of an issue.