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Class 2 Circuit Description

WARNING: This page is about a different car, the 2005 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

The data link connector (DLC) allows a scan tool to communicate with the class 2 serial data circuit. Class 2 serial data is transmitted on a single wire at an average of 10.4 Kbps. The bus is active at 7 volts nominal and inactive at ground potential. When the ignition switch is in RUN, and a scan tool is connected to the DLC, the 2.5L (L61) powertrain control module (PCM) will start communicating diagnostic information over the class 2 serial data circuit. The 3.5L (LX9) PCM does not use a class 2 serial data circuit.

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