VOLVO
CCM-B108783 - LIN Bus A. Bus Signal / Message Failures. Value of signal protection calculation incorrect
System
Climate Control Module (CCM)
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?
The climate control module (CCM) has received a checksum in a message on LIN bus 1 that does not match. This means the signal from a component on the bus is not correct. The fault may be caused by interference or by two components on the bus having the same ID.
Possible causes
- Communication interference
- Two LIN nodes with the same ID are installed in the car
- A damper motor may be installed in the wrong position, for example one for recirculation in place of one for air distribution
What you can do
- 1Check that the damper motors sit in the correct positions for their specific IDs
- 2Check that the seat heating module (SHM) sits in the correct position
- 3Has a damper motor recently been replaced? If so, check that it is fitted in the right place
- 4Clear the code and road test the car to see whether it returns
- 5Have a workshop read and check the ID of the connected control modules
Symptoms you may notice5
- Airflow does not work as it should
- No recirculation of the air
- Temperature control is uneven
- Poor heating in the cabin
- Temperature control or air conditioning does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.