VOLVO
ECM-U007400 - Control module communication bus "B" Off. General Failure Information. No sub type information
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
8 ModelleS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Modelle nach Baujahr und Motor anzeigen (8)
- Volvo S60 (2011–)2014–2015Nur Motor: B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo S80 (2007–)2014–2015Nur Motor: B4204T11, B4204T12, B4204T15, D4204T5
- Volvo V40 (2013–)2015Nur Motor: B4204T11, D4204T14
- Volvo V40 Cross Country (2013–)2015Nur Motor: B4204T11, D4204T14
- Volvo V60 (2011–)2014–2015Nur Motor: B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo V70 (2008–)2014–2015Nur Motor: B4204T11, D4204T5
- Volvo XC60 (2009–)2014–2015Nur Motor: B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo XC70 (2008–)2014–2015Nur Motor: B4204T11, D4204T5
Was bedeutet der Fehlercode?
The engine control module (ECM) has stopped communicating on CAN network B and switched itself off (bus-off). The code is set when the module detects that CAN communication is blocked by a serious disturbance, and then the other control modules cannot reach it.
Mögliche Ursachen
- Contact resistance or oxidation in the connections
- Open circuit in one of the CAN wires
- Short circuit between the CAN wires
- Internal fault in the ECM
- Internal fault in another control module on the same part of the CAN network
Was Sie tun können
- 1Read the code with a diagnostic tool and see whether it is active or only stored
- 2Look at the codes in the other control modules, since they may show that they have also lost contact with the network
- 3Check the connections at the engine control module and at other control modules on the same network for contact resistance and oxidation
- 4Use a multimeter to check that the CAN wires have no break and no short to each other
- 5Have a workshop determine whether the engine control module or another control module on the network is communicating wrongly
Symptome, die Sie bemerken können4
- Check engine light comes on or behaves abnormally
- The engine lacks power, especially when pulling away from standstill
- The engine hesitates or surges on acceleration and at steady speed
- Red warning symbol and text message in the display
Was der Fehler beeinflussen kann2
- The engine control module stops communicating on the CAN network and switches itself off
- The engine control module stays off until the voltage supply has been broken, and makes new attempts to communicate when the voltage is connected again
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.