Bulb Test

The Instrument Panel Cluster (IPC) will flash the air bag warning indicator 7 times when the ignition switch is turned from OFF to RUN. The inflatable restraint Sensing And Diagnostic Module (SDM) then commands the IPC to turn the warning indicator OFF through serial data communication. This indicates that there are no malfunctions in the SIR system. If a malfunction is present, the IPC flashes the warning indicator seven times and the SDM then commands the IPC to turn the warning indicator ON.