VOLVO
CCM-B108888 - LIN Bus B. Bus Signal / Message Failures. Bus off
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 lost contact on LIN bus 2, so the components on the bus, such as the damper motors and seat heating modules, do not respond. The cause is a short circuit to ground or to supply voltage on the bus.
Possible causes
- Short circuit to ground
- Short circuit to supply voltage
What you can do
- 1Check that the fuses are intact
- 2Check that the connectors on the bus are secure, clean and undamaged
- 3Check with a multimeter that the LIN bus 2 wires touch neither ground (the bodywork) nor supply voltage when disconnected
- 4After repair, clear the code and check that the controls respond as expected
Symptoms you may notice5
- Mist on the windows and/or the outside mirrors
- Poor heating in the cabin
- Front seat heating does not operate
- Temperature control is uneven
- Temperature control or air conditioning does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.