Diagnostic Procedure
WARNING: This page is about a different car, the 2003 Suzuki XL-7 and 2003 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM) under REMOVAL & INSTALLATION. Go to AIR BAG DIAGNOSTIC SYSTEM CHECK under DIAGNOSTICS.