Preliminary Inspection

IMPORTANT: Complete the following steps before using the symptom tables:
1. Perform the Diagnostic System Check - SIR before using the symptom tables in order to verity that all of the following are true:
^ There are no diagnostic trouble codes (DTCs) set.
^ The Inflatable Restraint Sensing And Diagnostic Module (SDM) can communicate via the serial data link. Diagnostic System Check
2. Review the SIR system description and operation in order to familiarize yourself with the system functions. Refer to SIR System Description and Operation.

VISUAL/PHYSICAL INSPECTION
^ Inspect for aftermarket devices which could affect the operation of the SIR system. Refer to Checking Aftermarket Accessories in Diagrams.
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

INTERMITTENT
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent and Poor Connections in Diagrams.

SYMPTOM LIST
Refer to the following symptoms in order to properly diagnose the symptom:
^ Air Bag Indicator Always On AIR BAG Indicator Always On
^ Air Bag Indicator Does Not Come ON AIR BAG Indicator Does Not Come ON