VOLVO
ECM-U007400 - Control module communication bus "B" Off. General Failure Information. No sub type information
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
8 modellerS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Vis modeller per årsmodell og motor (8)
- Volvo S60 (2011–)2014–2015Kun motor: B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo S80 (2007–)2014–2015Kun motor: B4204T11, B4204T12, B4204T15, D4204T5
- Volvo V40 (2013–)2015Kun motor: B4204T11, D4204T14
- Volvo V40 Cross Country (2013–)2015Kun motor: B4204T11, D4204T14
- Volvo V60 (2011–)2014–2015Kun motor: B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo V70 (2008–)2014–2015Kun motor: B4204T11, D4204T5
- Volvo XC60 (2009–)2014–2015Kun motor: B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo XC70 (2008–)2014–2015Kun motor: B4204T11, D4204T5
Hva betyr feilkoden?
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.
Mulige årsaker
- 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
Hva du kan gjøre
- 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
Symptomer du kan merke4
- 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
Hva feilen kan påvirke2
- 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
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