Circuit Description
The ignition switch supplies ignition 1 voltage to the inflatable restraint sensing and diagnostic module (SDM) using the F8 fuse. The ignition switch also supplies battery voltage to the AIR BAG indicator using the F4 fuse. The AIR BAG indicator is connected to the AIR BAG indicator output of the SDM. When the ignition switch is first turned to the ON position, the SDM responds by flashing the AIR BAG indicator seven times.
Diagnostic Aids
Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with a reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: SIR Schematics | |||||||||||
1 | Did you perform the Diagnostic System Check - SIR? | Go to Step 2 | |||||||||
2 | Do any of the other instrument cluster indicators or gages function? | Go to Step 3 | Go to Symptoms - Instrument Panel, Gages and Console in Instrument Panel, Gages, and Console | ||||||||
Does the AIR BAG indicator come ON? | Go to Step 5 | Go to Step 4 | |||||||||
4 |
Did you find and correct the condition? | Go to Step 7 | Go to Step 6 | ||||||||
5 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Did you complete the replacement? | Go to Step 7 | -- | ||||||||
6 | Repair the open or high resistance in the air bag indicator control circuit. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 7 | -- | ||||||||
7 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | ||||||||
