DTC B1610 & DTC B1620:
WARNING: This page is about a different car, the 2002 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.
If diagnostic trouble code B1610 is present, air bag control module is configured incorrectly. Replace air bag control module. See AIR BAG CONTROL MODULE under REMOVAL & INSTALLATION. Configure air bag control module. See AIR BAG CONTROL MODULE PROGRAMMING under DIAGNOSTICS.
If diagnostic trouble code B1620 is present, air bag control module is not configured. See AIR BAG CONTROL MODULE PROGRAMMING under DIAGNOSTICS.