VOLVO
ECM-A20B - Engine control module (ECM). Signal missing
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
4 ModelleC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Modelle nach Baujahr und Motor anzeigen (9)
- Volvo C30 (2007–2013)2007Nur Motor: B5254T3
- Volvo C30 (2007–2013)2008–2013Nur Motor: B5254T7
- Volvo C70 (2006–2013)2006–2007Nur Motor: B5254T3
- Volvo C70 (2006–2013)2008–2013Nur Motor: B5254T7
- Volvo S40 (2004–2013)2005–2007Nur Motor: B5254T3
- Volvo S40 (2004–2013)2008Nur Motor: B5254T3, B5254T7
- Volvo S40 (2004–2013)2009–2012Nur Motor: B5254T7
- Volvo V50 (2004–2013)2005–2007Nur Motor: B5254T3
- Volvo V50 (2004–2013)2008–2012Nur Motor: B5254T7
Was bedeutet der Fehlercode?
The central electronic module (CEM) sends a timer value over the CAN network that tells the modules how long the engine has been off since its last shutdown. The engine control module uses it, for example, when restarting a warm engine. The code is set when the engine control module finds the timer value wrong or missing, and the malfunction indicator lamp comes on.
Mögliche Ursachen
- Fault in the central electronic module (CEM), which should be checked first
- Open or short circuit in the CAN wiring between the engine control module and the CEM
- Damaged central electronic module (CEM)
Was Sie tun können
- 1Read the fault codes in the CEM and in any other modules that may be involved, and note which are stored
- 2Remedy the faults in the CEM and the CAN network first; this code must not be cleared until the codes in the CEM and other affected modules are remedied and cleared
- 3Check the CAN wiring and connectors between the engine control module and the CEM for open circuits, short circuits and chafing
- 4After the repair, clear the code and start the car to see whether it returns
Symptome, die Sie bemerken können1
- Malfunction indicator lamp (MIL) on
Was der Fehler beeinflussen kann1
- The engine control module calculates a timer value instead
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.