Table 1. Communication Table Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method Airbag ECU Assembly ECM Crash detection signal CAN Airbag ECU Assembly Combination Meter Assembly SRS warning light on demand signal Diagnosis signal (DTC) Airbag ECU Assembly Main Body ECU (Multiplex Network Body ECU) Driver seat buckle switch signal ECM Airbag ECU Assembly Engine speed signal Shift position signal Stop signal Test mode signal Skid Control ECU (Brake Actuator Assembly) Airbag ECU Assembly Vehicle speed signal Main Body ECU (Multiplex Network Body ECU) Airbag ECU Assembly Trip count signal Time count signal