WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Data Link Communications Schematic Icons
Courtesy of GENERAL MOTORS CORP.
Fig 2: Data Link Connector (DLC) Schematics (Power & Ground)
Courtesy of GENERAL MOTORS CORP.
Fig 3: Data Link Connector (DLC) Schematics (Star Connectors)