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Bus messages, Seat belt system

Bus messages, Seat belt system

For a detailed description of the car's bus system, see bus and diagnostics communication, detailed description .

The BCM uses the following information

Bus message Unit Transmitter Description
Seat-belt switch, driver On/Off ACM Detects if the belt is fastened or unfastened
Belt switch, passenger On/Off ACM Detects if the belt is fastened or unfastened


The BCM sends the following information

Bus message Unit Transmitter Description
Seat-belt warning lamp, passenger On/Off ICM The BCM sends an SID warning message via the ICM
Seat-belt warning lamp On/Off MIU The BCM sends an MIU warning message via the ICM