CEM-DF03 - CAN-H, low speed network. Signal too high
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 measures CAN H on the low speed network as too high, which comes from a short to supply voltage in the network. Communication between the control modules is disturbed, so central locking, gauges, instrument lighting and the radio can be affected. The fault most often lies in the wiring, or in a control module sending faulty messages.
Mögliche Ursachen
- The CAN H wire on the low speed network is shorted to supply voltage
- Short to supply voltage somewhere else on the low speed network
Was Sie tun können
- 1Check that the cable harness is not chafed, pinched or damaged by moisture, especially where the CAN wires run close together
- 2Check the connectors on the CAN network for loose connections, corrosion and damage
- 3With a diagnostic tool, read the fault codes from all control modules. Communication faults in several modules point to a shared fault in the network
- 4Use a multimeter to check that the CAN H wire is not shorted to supply voltage. Compare it with the CAN L wire if in doubt
- 5If the fault remains after the wiring has been checked, a control module sending faulty messages may be the cause. A workshop with diagnostic equipment is then needed to find it
- 6The CEM should not be replaced for a CAN fault until a workshop has confirmed an internal fault in the CEM
Symptome, die Sie bemerken können4
- The central locking does not work at all
- Radio interference
- No gauges work
- The instrument panel lighting does not work
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.