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Bus messages, audio

Bus messages, audio

For a more in-depth description of the vehicle bus system, see Detailed description .

The head unit uses the following information

Transmitter Gateway Receiver Message
CIM BCM EHU Ignition key position
BCM - EHU Dimming 0 - 100 %. Night Panel ON/OFF
MIU BCM EHU Vehicle Identification Number
MIU BCM EHU Language selection
ECM BCM EHU Vehicle speed
CIM BCM EHU Status, steering wheel controls
BCM - EHU Low consumption position
ACM BCM EHU Airbag status
ECM BCM BTN Wheel rotation information
TCM BCM BTN Gear position information
CIM/UHP/BCM BCM EHU Radio mute
EHU BCM All Infotainment Operation Allowed
EHU BCM All Time format
EHU BCM All Date/Time
EHU BCM UHP/OnStar Voice activation active
EHU - OnStar OnStar active
EHU - SDAR SDAR/satellite radio active
EHU - OnStar Voice activation active/Remote control OnStar
EHU - SDAR SDAR/satellite radio information requested
EHU - TMC Traffic information requested