Preliminary Inspection

IMPORTANT: The following steps must be completed before using the symptom tables.

1. Perform the A Diagnostic System Check Diagnostic System Check - SIR before using the Symptom Tables in order to verity that all of the following are true:
^ There are no DTCs set.
^ The control module(s) can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to SIR System Operation.

VISUAL/PHYSICAL INSPECTION
^ Inspect for aftermarket devices which could affect the operation of the SIR system. Refer to Checking Aftermarket Accessories in Diagram.
^ 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 Diagram.

SYMPTOM LIST
Refer to AIR BAG Warning Lamp Circuit Malfunction in order to diagnose the symptom. Symptom Related Diagnostic Procedures