VOLVO
ECM-U012D87 - Lost Communication With Generator Control Module. Bus Signal / Message Failures. Missing message
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) sets the alternator charging voltage over LIN, following requests from the central electronics control module (CEM) on CAN. The code is set when the engine control module detects that messages from the alternator control module (ACM) are missing, meaning an expected message does not arrive.
Mögliche Ursachen
- Contact resistance and oxidation in the connections
- Short circuit between the LIN wires
- Open circuit in one of the LIN wires
- Internal fault in another control module on the same part of the LIN network
- Faulty alternator control module (ACM), including its charge regulator
Was Sie tun können
- 1Read the codes in the engine control module and fix other LIN-related codes first
- 2Check that the fuses are intact and that the battery has good voltage
- 3Look for chafed or pinched LIN wires. Use a multimeter to check that they have no break or short to ground or supply voltage
- 4Check the connectors at the alternator and the engine control module for oxidation and loose contacts
- 5If you have a diagnostic tool: check the fault's status indicators and freeze-frame values to see when the fault occurred
- 6If the fault returns: have a workshop with diagnostic equipment check the alternator control module and the LIN network
Symptome, die Sie bemerken können4
- The battery is dead or shows low voltage
- The engine is hard to start and the starter turns over slowly
- The engine lacks power, especially when the car is moving off
- The engine hesitates, surges or runs unevenly
Was der Fehler beeinflussen kann1
- The alternator control module charges at a fixed voltage
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.