300SE (140.032) L6-3.2L (104.990) (1992)
Information Bus: Description and Operation
CAN Data Bus
The controller area network (CAN) connects the control units electrically so information can be transmitted from one control unit to the other. This
exchange network results in more information for the control units, less wiring and lower vehicle weight.
GF54.00-P-0005-01A CAN Data Bus Data Telegram
GF54.00-P-0005-01A CAN Data Bus Data Telegram
During normal operation, messages consist of the following transfer frames:
^
Data frame
for transmitting CAN messages (such as coolant temperature, etc.).
^
Remote frame
for requesting CAN data from a different control unit.
^
Error frame
informs all connected control units that an error has occurred and that the most recent CAN message is invalid.
The CAN protocol supports two different data frame formats, with the only difference residing in the length of the identifier:
-
the standard format
-
the expanded format
Only the standard format is currently in use at DaimlerChrysler.