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Home >> Chevrolet >> 2001 >> Impala Base, 3.8 K >> Repair and Diagnosis >> External Pages >> Different car >> Section 119 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> Sir Diagnostic System Check >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.

Ignition switch supplies ignition voltage to Sensing and Diagnostic Module (SDM) at terminal A1 via AIR BAG fuse, located in fuse block behind right side of instrument panel. When ignition is turned on, SDM responds by performing tests on SIR system while commanding Instrument Panel Cluster (IPC) to flash AIR BAG warning light 7 times. If no malfunctions exist in SIR system, AIR BAG warning light will turn off.

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