CEM-DF05 - CAN-H, low speed network. Signal too low
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Dieser Fehlercode hat je nach Modell, Modelljahr oder Motor unterschiedliche Bedeutungen. Wählen Sie die Bedeutung, die für Ihr Fahrzeug gilt.
Gilt für folgende Modelle:
10 ModelleC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), S60 (2001–2009), S80 (1999–2006), V50 (2004–2013), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Modelle nach Baujahr und Motor anzeigen (10)
- Volvo C30 (2007–2013)2007–2013
- Volvo C30 Electric (2011–2013)2011–2013
- Volvo C70 (2006–2013)2006–2013
- Volvo S40 (2004–2013)2004–2012
- Volvo S60 (2001–2009)2005–2009
- Volvo S80 (1999–2006)2005–2006
- Volvo V50 (2004–2013)2004–2012
- Volvo V70 (2000–2008)2005–2008
- Volvo V70 XC / XC70 (2001–2007)2005–2007
- Volvo XC90 (2003–)2005–2015
Was bedeutet der Fehlercode?
The CEM detects that CAN H in the low speed network has contact with earth, so the signal becomes too low. Communication between the control modules can then break down, and the gauges, instrument lighting, central locking and remote control may stop working. The fault most often lies in the network wiring.
Mögliche Ursachen
- Short to earth on the CAN H wire in the low speed network
Was Sie tun können
- 1With the ignition on, check whether the gauges and instrument lighting work. Which functions are lost shows which control modules are affected
- 2With a diagnostic tool, read the fault codes from all control modules. Communication faults in several modules point to a shared fault in the network
- 3Use a multimeter to check that the CAN H wire has no contact with earth or the body along its length
- 4Check the connectors on the CAN network for loose connections, corrosion and moisture
- 5Gently flex the cable harness while watching the communication, to see whether the fault disappears or changes
- 6The CEM should not be replaced for a CAN fault unless a workshop has confirmed an internal fault in the CEM
Symptome, die Sie bemerken können4
- No gauges work
- The instrument lighting does not work
- Locking and unlocking with the remote control does not work
- The central locking does not work at all
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.