Control Module Connection Via CAN

Function
All control modules with a control function for the automatic air conditioning are connected with one another by the passenger compartment bus (CAN class B). The CAN data bus is a bidirectional bus, i.e. each control module connected is capable of transmitting and receiving information.
A defined data protocol specifies how and when the control modules can transmit and receive information.
The CAN data bus has a message-related address system. This means that each message is assigned a fixed address (identifier), indicating the contents of the message. The receiver evaluates only the messages (data telegrams) stored in its list of messages to be received (acceptancy check).