Scan Tool Testing and Procedures: Description and Operation

A scan tool is used to read active and history diagnostic trouble codes and to clear all diagnostic trouble codes after a repair is completed. The scan tool must be updated to communicate with the SIR system. To use a scan tool, connect it to the data link connector and turn the ignition switch "On." The scan tool reads serial data from the Sensing and Diagnostic Module (SDM) "SERIAL DATA" output terminal A5" to the Data Link Connector terminal 9.