The scan tool provides the following capabilities:

Before communicating with the SIR system, ensure the scan tool contains the latest software In order to use the scan tool, connect the scan tool to the Data Link Connector (DLC), and turn the ignition switch to the ON position. The scan tool reads serial data from the inflatable restraint Sensing and Diagnostic Module (SDM).The serial data comes from the SDM output terminal 1 to the DLC terminal 9.

The SIR Scan Tool Data List contains all restraint-related parameters that are available on the scan tool. The list is in alphabetical order.

Use the SIR Scan Tool Data List, only after the following conditions are met:

Compare the scan tool values from a system that operates correctly with the values from the SIR system that you are diagnosing. The SIR Scan Tool Data List presents the values of a system that operates correctly.

Important: Verify that the scan tool that you are using operates correctly. Use of a malfunctioning scan tool can result in misdiagnosis and in unnecessary parts replacement.

Only the parameters below are referenced in this service manual for use in diagnosis. If the values match the values of a system that operates correctly, refer to Testing for Intermittent Conditions and Poor Connections for diagnosis.