Section 557 (On-Board Diagnostic [Air Bag System)): Foreword: Flowchart

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

While performing the inspection of the past malfunction code, the applicable DTCs may be added to memory by removing or disconnecting the related parts. Inspect only the DTCs that were indicated before inspecting.
When DTCs of present malfunction are no longer output after present and/or past malfunctions have been repaired, be sure to perform past malfunction display cancellation to prevent repair of malfunctions that have already been repaired.

Fig 1: Air Bag System Troubleshooting Flow Chart

Courtesy of MAZDA MOTORS CORP.