Diagnostic Trouble Code Table
WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
Use Diagnostic Trouble Codes (DTCs) (from the DTC checks) in Fig 1 to determine the trouble area and proper inspection procedure. The Supplemental Restraint System (SRS) diagnostic trouble code table is shown below as an example.