VOLVO
CCM-DD12 - Left seat heater. No communication
System
Climate Control Module (CCM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
5 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
What does this fault code mean?
The climate control module (CCM) loses contact with the left seat heating module over LIN bus 1, so the left front seat heating cannot be controlled. The fault only applies to cars with seat heating and may appear together with fault codes for other components on the bus.
Possible causes
- Break in LIN bus 1 wiring between the module and the left seat heater
- Poor contact, corrosion or loose connections at the connectors
What you can do
- 1Check that the fuse for the seat heater is intact
- 2Check that the seat heating module connector is secure and clean
- 3Check with a multimeter that the LIN bus 1 wire between the module and the seat heater is not open when the connectors are disconnected
- 4Clear the code and road test the car to see whether it returns
- 5If the fault remains and the wiring is intact, have a workshop replace the seat heating module
Symptoms you may notice1
- Front seat heating does not operate
General guidance for car owners. Diagnosis on the car can point to a different cause.