Electrical Faults
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2009 Volvo S60, 2008 Volvo S60, 2007 Volvo S60, 2006 Volvo S60, and 2005 Volvo S60. However, it is still accessible from the selected car via links, so may be relevant.
The communication circuits in the LIN control modules cannot detect electrical faults on the wire. However the master node continuously reads back the last message it sent itself to check that it has been sent correctly over the LIN bus.
Should the master node discover that the message last read back is incorrect, for example if the signal wire has been short-circuited to voltage or ground, the master node can set the diagnostic trouble code (DTC) denoting the message has not been sent correctly.