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HOMESERVICE MANUALSSUBARU2014OUTBACK 2.5I, STANDARD TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESLAN SYSTEM - MECHANISM & FUNCTIONWHAT IS CAN?FEATURESMESSAGE TRANSFER
2014 Subaru Outback 2.5i, Standard Trans

Message Transfer

2014 Subaru Outback 2.5i, Standard TransSECTION Message Transfer
  • All messages on CAN bus are sent in fixed formats.
  • When the bus (communication line) is free, any unit connected to the bus may start to transmit a message.
  • If two or more units start to transmit messages at the same time, these messages are prioritized using the identifier.
  • The identifier does not indicate the destination of the message, but it signifies message priority for bus access.
  • If two or more units start to transmit messages at the same time, bitwise (smallest-unit) arbitration is performed over the identifiers carried by the messages. The unit that has won the arbitration as carrying a higher-priority message continues to send the message while the unit that has a lower priority stops sending the message, and starts sending the message again after waiting for a while.
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