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What is the pinout definition of the OBD interface?

1 Answers

SanReed

07/29/25 11:58pm

OBD stands for On-Board Diagnostics, which translates to 'vehicle self-diagnosis system' in Chinese. 'OBD-II' refers to 'On-Board Diagnostics II'. Here are the functions of the OBD interface: 1. Continuously monitor component and system failures to ensure vehicle emissions do not exceed OBD regulatory requirements throughout its service life. 2. When detecting emission-related faults, the OBD system can trigger the MIL (Malfunction Indicator Lamp) on the dashboard as a warning. 3. Enable timely repairs of faulty vehicles to reduce emissions. 4. The OBD system assists technicians in rapid diagnosis and targeted repairs, thereby reducing maintenance costs.

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