Diagnostic Aids
WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
If ignition voltage is out of normal range, (9-16 volts), AIR BAG warning light will stay on with no Diagnostic Trouble Codes (DTC's) set. Loss of serial data communication between SDM and Instrument Panel Cluster (IPC) will also cause AIR BAG warning light to come on.
NOTE:
For circuit number and wire color identification, see WIRING DIAGRAMS .