Scan Tool Testing and Procedures: Description and Operation

You must use a scan tool to read and clear the SIR DTCs. The scan tool may need to be updated to communicate with the SIR system before it can be used for SIR diagnostics. In order to use the scan tool, connect it to the data link connector and turn ON the ignition switch. The scan tool reads serial data from the DERM serial data output terminal B11 at the data link connector terminal 9. A scan tool can also provide SIR system circuit values are referred to in the diagnostic trouble code tables to aid in diagnosing certain SIR system malfunctions. For additional information, refer to the scan tool instruction manual. After completing a repair, use the scan tool to clear the DTC(s) and then perform the SIR Diagnostic System Check. SIR Diagnostic System Check