VOLVO
ECM-U007400 - Control module communication bus "B" Off. General Failure Information. No sub type information
Układ
Sterownik silnika (ECM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
8 modeliS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Pokaż modele wg rocznika i silnika (8)
- Volvo S60 (2011–)2014–2015Tylko silnik: B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo S80 (2007–)2014–2015Tylko silnik: B4204T11, B4204T12, B4204T15, D4204T5
- Volvo V40 (2013–)2015Tylko silnik: B4204T11, D4204T14
- Volvo V40 Cross Country (2013–)2015Tylko silnik: B4204T11, D4204T14
- Volvo V60 (2011–)2014–2015Tylko silnik: B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo V70 (2008–)2014–2015Tylko silnik: B4204T11, D4204T5
- Volvo XC60 (2009–)2014–2015Tylko silnik: B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo XC70 (2008–)2014–2015Tylko silnik: B4204T11, D4204T5
Co oznacza ten kod błędu?
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.
Możliwe przyczyny
- 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
Co możesz zrobić
- 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
Objawy, które możesz zauważyć4
- 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
Na co może wpływać usterka2
- 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
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.