Diagnostic System Check

Circuit Description
The ignition switch supplies Ignition voltage to the Inflatable Restraint Sensing and Diagnostic and Seat Belt Pretensioner Module (SDM) at terminal 5. When the ignition switch is turned to the ON position, the SDM responds by performing tests on the SIR system and then turning the AIR BAG warning lamp OFF after it had flashed seven times.

Diagnostic Aids
You must diagnose the diagnostic trouble codes in the order specified by the SIR Diagnostic System Check. Failure to do so may result in the following:
^ Extended Diagnostic Time
^ Incorrect Diagnosis
^ Incorrect Parts Replacement

Test Description
The numbers below refer to the step numbers on the diagnostic table.
1. This step checks to see if the AIR BAG warning lamp flashes seven times when the ignition switch is turned to the ON position.
2. This step determines if the AIR BAG warning lamp stays ON at all times or if the AIR BAG warning lamp does not turn ON at all.
3. This step checks to see if the AIR BAG warning lamp turns OFF after it had flashed seven times.
4. This step checks to see if the scan tool can communicate with the Inflatable Restraint Sensing and Diagnostic and Seat Belt Pretensioner Module (SDM).
5. This step checks to see if there are any current DTCs present.
6. This step diagnoses all current DTCs.
7. This step checks to see if the scan tool can communicate with the SDM.
8. This step checks to see if there are any history DTCs present.
9. This step diagnoses all history DTCs.