VOLVO
ECM-U012087 - Lost Communication with Starter/ Generator Control Module. Bus Signal / Message Failures. Missing message
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
7 ModelleS60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Modelle nach Baujahr und Motor anzeigen (13)
- Volvo S60 (2011–)2011–2014Nur Motor: B6304T4
- Volvo S60 (2011–)2015Nur Motor: B6304T3, B6304T4, B6304T5
- Volvo S80 (2007–)2007Nur Motor: B6324S, B8444S
- Volvo S80 (2007–)2008–2009Nur Motor: B6304T2, B6324S, B8444S
- Volvo V60 (2011–)2011–2014Nur Motor: B6304T4
- Volvo V60 (2011–)2015Nur Motor: B6304T3, B6304T4, B6304T5
- Volvo V70 (2008–)2008–2009Nur Motor: B6304T2, B6324S
- Volvo XC60 (2009–)2009–2010Nur Motor: B6304T2
- Volvo XC60 (2009–)2011–2015Nur Motor: B6304T4
- Volvo XC70 (2008–)2008Nur Motor: B6324S
- Volvo XC70 (2008–)2009Nur Motor: B6304T2, B6324S
- Volvo XC90 (2003–)2005–2006, 2011Nur Motor: B8444S
- Volvo XC90 (2003–)2007–2010Nur Motor: B6324S, B8444S
Was bedeutet der Fehlercode?
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.
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
- Alternator with a charge regulator that is not intended for LIN communication is fitted
Was Sie tun können
- 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
Symptome, die Sie bemerken können4
- The battery discharges
- Starter motor turns over slowly
- The engine jerks when the throttle is applied
- Charging warning light comes on or behaves abnormally
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.