VOLVO
IHU-B108783 - LIN Bus A. Bus Signal / Message Failures. Value of signal protection calculation incorrect
System
Infotainment Head Unit (IHU)
Volvo models this fault code applies to
Applies to the following models:
9 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
Signals from the steering wheel buttons travel to the infotainment head unit (IHU) over the LIN bus. The code is stored when a received message does not match the expected message.
Possible causes
- A fault in the transmitting control module, the one that sends the steering wheel button signals
What you can do
- 1Read and clear the code, then check whether it comes back
- 2Check that the relevant fuses are intact
- 3If there is another code from the same control module that concerns the same LIN bus, work on that one first
- 4If you have a diagnostic tool: read the steering wheel button status in live data while you press the buttons
- 5If the fault remains, have a workshop trace the LIN bus further
Symptoms you may notice1
- The steering wheel button panel for audio does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.