Scan Tool Testing and Procedures: Description and Operation

A scan too] is used to read data lists, current 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 through a replaceable cartridge before it can be used for SIR diagnostics. To use the scan tool, connect it to the data link connector and turn the ignition switch to RUN. The scan tool reads Serial Data from the inflatable restraint sensing and diagnostic module Serial Data output terminal 5 to the Data Link Connector (DLC) terminal 9.

The Tech 2 scan tool displays information that the inflatable restraint sensing and diagnostic module sends to the Tech 2 over the serial data line.