Scan Tool Testing and Procedures: Description and Operation

A scan tool is used in order to read data lists, current and history diagnostic trouble codes. The tool is also used in order to clear all diagnostic trouble codes after a repair is completed. Before you can use the scan tool for SIR diagnostics, you must first update the tool in order to communicate with the SIR system through a replaceable cartridge. Connect the tool to the data link connector and turn the ignition switch to the ON position. The scan tool reads Serial Data from the inflatable restraint Sensing and Diagnostic Module (SDM) Serial Data output terminal 1 to the Data link Connector (DLC) terminal 9.

The scan tool displays information that the SDM sends to the scan tool over the UART serial data line. Refer to Scan Tool Data List.