How does obd wired computer receive data?

Use GM diagnostic and test tools. It supports all OBD-II self-diagnosis systems and compatible communication protocol detection. The interface is a USB interface, which is connected to the USB interface of the notebook computer through RS232 conversion protocol.

Next, install the OBD detection software, PCMSCAN.

Run after installation. If you are not registered, a window will pop up. If it is not registered, the software can only read one parameter RPM, and the software will successfully find the ECU.

Run the function test in the software, and you can get the current parameters of the vehicle through the mobile phone.

OBD is the abbreviation of English On-Board Diagnostic, which is translated into "on-board diagnostic system" in Chinese. This system monitors the running state of the engine and the working state of the exhaust aftertreatment system at any time, and will give an alarm once it is found that the emission may exceed the standard. When the system fails, the MIL or Check Engine warning light will light up, the OBD system will store the failure information in the memory, and the relevant information can be read in the form of failure codes through the standard diagnostic instrument and diagnostic interface. According to the prompt of fault code, maintenance personnel can quickly and accurately determine the nature and location of the fault.