Grand Prix V6-3100 3.1L MFI VIN M (1994)
Information Bus: Component Tests and General Diagnostics
There are two data lines that can be accessed with a scan tool. The 800 circuit data line is the Powertrain Control Module (PCM) Data Line. It allows the
Powertrain Control Module, Sensing and Diagnostic Module (SDM) and Electronic Brake Control Module (EBCM) (if equipped) to communicate by
transmitting data through CKT 800. The 835 circuit data line is the Entertainment and Comfort (E & C Bus) Data Line. It allows the Radio to
communicate via CKT 835.
A scan tool can be connected to the Data Link Connector (DLC); this allows the scan tool to communicate with both the PCM Data Line and E & C Data
Lines. System operations can then be monitored for diagnostic purposes.
