Data Link Connector: Description and Operation

There are three modules which may be accessed with a Tech 1 Scan Tool through the Data Link Connector. The 800 CKT provides a path that allows the Scan Tool to read data from the Powertrain Control Module (PCM), Diagnostic Energy Reserve Module (DERM), and the Electronic Brake Control Module (EBCM). After communication is established, system operations can then be monitored for diagnostic purposes. The Serial Data Line (Class 2) allows a scan tool to directly access the Powertrain Control Module (PCM) to read emissions related data.