VOLVO
ECM-U012087 - Lost Communication with Starter/ Generator Control Module. Bus Signal / Message Failures. Missing message
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
7 modellerS60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Vis modeller per årsmodell og motor (13)
- Volvo S60 (2011–)2011–2014Kun motor: B6304T4
- Volvo S60 (2011–)2015Kun motor: B6304T3, B6304T4, B6304T5
- Volvo S80 (2007–)2007Kun motor: B6324S, B8444S
- Volvo S80 (2007–)2008–2009Kun motor: B6304T2, B6324S, B8444S
- Volvo V60 (2011–)2011–2014Kun motor: B6304T4
- Volvo V60 (2011–)2015Kun motor: B6304T3, B6304T4, B6304T5
- Volvo V70 (2008–)2008–2009Kun motor: B6304T2, B6324S
- Volvo XC60 (2009–)2009–2010Kun motor: B6304T2
- Volvo XC60 (2009–)2011–2015Kun motor: B6304T4
- Volvo XC70 (2008–)2008Kun motor: B6324S
- Volvo XC70 (2008–)2009Kun motor: B6304T2, B6324S
- Volvo XC90 (2003–)2005–2006, 2011Kun motor: B8444S
- Volvo XC90 (2003–)2007–2010Kun motor: B6324S, B8444S
Hva betyr feilkoden?
The engine control module (ECM) controls the alternator charging voltage via LIN communication with the alternator control module (ACM), on request from the central electronics control module (CEM). The code is set when the engine control module detects that communication with the alternator control module has stopped, meaning an expected message is missing. Although the code is titled lost communication with the starter/generator control module, it concerns the message from the alternator control module.
Mulige årsaker
- 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
- Alternator with a charge regulator that is not intended for LIN communication is fitted
Hva du kan gjøre
- 1Check that the fuses are intact and that the battery has good charge and voltage
- 2Check the connectors at the alternator and at the engine control module for contact resistance and oxidation
- 3Look for chafed or pinched LIN wires. Use a multimeter to check that the wires have no break and are not shorted to ground or supply voltage
- 4If the alternator has recently been replaced: check that it is intended for LIN communication
- 5If the fault returns: have a workshop with diagnostic equipment check the alternator control module and the communication on the LIN network
Symptomer du kan merke4
- The battery discharges
- Starter motor turns over slowly
- The engine jerks when the throttle is applied
- Charging warning light comes on or behaves abnormally
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