Was bedeutet der Fehlercode CEM-DE49?

Diagnose und Fehlercodedefinition für CEM-DE49 (Volvo C30 (2007–2013), Volvo C30 Electric (2011–2013), Volvo C70 (2006–2013)). Steuergerätereparatur bei OBD Tuning.

VOLVO

CEM-DE49 - Communication with the steering wheel module (SWM). Signal missing

System

Zentralelektronik (CEM)

Volvo-Modelle, für die dieser Fehlercode gilt

Gilt für folgende Modelle:

5 Modelle

C30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)

Modelle nach Baujahr und Motor anzeigen (5)

Was bedeutet der Fehlercode?

The CEM has lost contact with the steering wheel module (SWM), so functions controlled from the steering wheel do not work properly. This covers cruise control, the indicators, the steering wheel buttons and the wipers, which may only run at the lowest speed. The fault lies in communication on the low speed network.

Mögliche Ursachen

No supply to the steering wheel module (SWM)
Open circuit in the earth wire to the steering wheel module
Contact resistance in the connections
Open circuit in the LS-CAN wires to the steering wheel module
The steering wheel module does not suit the car, for example a used module with other software or hardware

Was Sie tun können

1With the ignition on, operate the indicator stalk. The indicators should flash. If they do not, the supply or communication to the steering wheel module is probably faulty
2Check that the steering wheel module fuses in the engine bay fuse box and in the CEM are intact
3Use a multimeter to check that the supply wire from the CEM to the steering wheel module has no break and is not shorted to earth
4Check the earth point of the steering wheel module for loose contact or oxidation
5With a diagnostic tool, read the steering wheel module ID. If it reads, the communication is probably fine. Press the wheel buttons and watch for changes in live data
6Do not replace the CEM before the communication fault with the steering wheel module has been checked

Symptome, die Sie bemerken können4

Cruise control does not work at all
The wipers only run at the lowest speed
The turn signals do not work
The buttons on the steering wheel do not work

Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.