Component Tests and General Diagnostics

Before proceeding to the network index charts to diagnose a network Diagnostic Trouble Code (DTC), review equipment level of vehicle. Make note of module and systems vehicle equipment. Before proceeding to a pinpoint test, make sure DTC being diagnosed is referencing a module or system with which the vehicle is equipped. The New Generation Star (NGS) tester may produce a network DTC for no communication if the vehicle is not equipped with the suspect module or system. The NGS tester will interpret a non-equipped module as a communication failure. If a DTC is retrieved for a nonequipped module or system, disregard this DTC. If a non-equipped DTC is the only DTC retrieved, the communication system self test should be considered passed.