What does that mean? Rather than the 16-pin port connector you’ll find with an OBD-II port, you’ll have an OBD-I port with two blue connectors: a two-pin service check connector and a three-pin data link connector. You’ll want to use the blue three-pin connector with an OBD-I scanner to retrieve diagnostic information.
The OBD system maintains all vital vehicle data, such as emissions and speed information. The main difference between the first and second-generation OBD systems is that the OBD-I system (equipped in your Civic) was externally linked to the vehicle’s console, while the OBD-II system is integrated into the vehicle itself.
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