VOLVO
CEM-DD41 - Communication with the steering wheel module (SWM). Signal missing
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
What does this fault code mean?
The steering wheel module (SWM) does not respond to signals from the central module. If the LIN wire is short-circuited, either to ground or to voltage, communication is blocked, and several functions in and around the steering wheel may stop working.
Possible causes
- The LIN wire is short-circuited to ground
- The LIN wire is short-circuited to voltage
- Internal fault in another unit on the same part of the LIN network
What you can do
- 1Check the wipers, washers, indicators, cruise control and the steering wheel buttons, and note which ones do not work
- 2The wires to the steering wheel module sit close to the airbag, so have a workshop check them
- 3If the fault remains, have a workshop replace the steering wheel module (SWM)
Symptoms you may notice4
- The wipers only work at the lowest speed
- Washing does not work
- The indicator switch does not work
- Cruise control does not work at all
General guidance for car owners. Diagnosis on the car can point to a different cause.