Description

C-3 systems include provisions for the use of a SCAN type diagnostic tool to interpret serial data available through terminal "E" of the ALDL connector. The SCAN tool is capable of monitoring sensor inputs to the ECM and ECM commands to the various system operating elements, and provides the means to save time in diagnosis and prevent replacement of satisfactory components. Successful use of the SCAN tool for diagnosis requires an understanding of how the C-3 system functions, a thorough acquaintance with the tool manufacturer's recommendations and knowledge of the SCAN tool's limitations.