SIR Diagnostic Flow

CAUTION: In order to avoid deploying the air bag when troubleshooting the SIR system, use only the equipment specified and the instructions given. Failure to use the specified equipment as instructed could cause air bag deployment, personal injury to you or someone else, or unnecessary SIR system repairs.

The diagnostic procedures used in this section are designed to find and repair SIR system malfunctions. To get the best results, it is important to use the diagnostic tables and follow the sequence listed below.

A. PERFORM THE SIR DIAGNOSTIC SYSTEM CHECK. The SIR Diagnostic System Check must be the starting point of any SIR diagnostics. The SIR Diagnostic System Check checks for proper AIR BAG warning lamp operation, the ability of the inflatable restraint Sensing and Diagnostic Module (SDM) to communicate through the Serial Data line and whether diagnostic trouble codes exist.

B. REFER TO DIAGNOSTIC TABLES FOR THE PROPER DIAGNOSTIC TABLE AS DIRECTED BY THE SIR DIAGNOSTIC SYSTEM CHECK. Testing and Inspection
The SIR Diagnostic System Check will lead you to the correct table to diagnose any SIR system malfunctions. Bypassing these procedures may result in extended diagnostic time, incorrect diagnosis and incorrect parts replacement.

C. REPEAT THE SIR DIAGNOSTIC SYSTEM CHECK AFTER ANY REPAIR OR DIAGNOSTIC PROCEDURES HAVE BEEN PERFORMED. Performing the SIR Diagnostic System Check after all repair or diagnostic procedures will ensure that the repair has been made correctly and that no other malfunctions exist.