Description & Operation

Vehicle has 2 module communications networks. The Powertrain Control Module (PCM) and Passive Anti-Theft System (PATS) module are connected to the multiplex communications network through a pair of twisted wires or BUS (also referred to as Standard Corporate Protocol). The BUS consists of a (+) circuit No. 914 and a (-) circuit No. 915. The air bag diagnostic monitor and all other optional modules (Generic Electronic Module (GEM), Remote Anti-Theft Personality (RAP) module, 4-Wheel Anti-Lock Brake System (4WABS) module and 4-Wheel Air Suspension (4WAS) module) are connected to the Standard Corporate Protocol (ISO) 9141 diagnostic communications network through a single wire (circuit No. 70). Both networks are connected to the Data Link Connector (DLC).

For module locations, see COMPONENT LOCATIONS TABLE. In the event that a system failure exists, a Diagnostic Trouble Code (DTC) will be stored in the module. A New Generation Star (NGS) scan tester and Data Link Connector (DLC) may be used for retrieving and clearing DTCs from the module. DTC may be used for system diagnosis.