Circuit Description
WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
When ignition switch is turned to RUN position, SDM fuse applies battery voltage to IGNITION POSITIVE VOLTAGE input, terminal No. A1. IPC fuse applies battery voltage to AIR BAG warning light through serial data line at terminal No. A13. SDM responds by flashing AIR BAG warning light 7 times. If IGNITION POSITIVE VOLTAGE is outside normal operating range (9-16 volts), AIR BAG warning light will come ON steady with no DTCs set.