VOLVO
ECM-0641 - Reference voltage A. Faulty signal
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
3 modellerC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (3)
Hva betyr feilkoden?
The ECM keeps watch on the reference voltage that feeds a number of components. If that voltage is not stable, the code is set. The fault may lie in a component's signal wire, which is shorted, or in the control module's own supply of reference voltage. The malfunction indicator lamp may light.
Mulige årsaker
- Component signal wire short-circuited to battery voltage or reference voltage
- Open circuit in the signal wire, or a short to earth in it
- Internal fault in the control module's supply of reference voltage
Hva du kan gjøre
- 1Check the connectors to the components for looseness, contact resistance and oxidation
- 2With the ignition on, check the signal wire to the component for breaks and chafing
- 3Use a multimeter to check that the signal wire has no contact with earth or supply voltage
- 4If the fault remains after these checks, the engine control module is a possible cause; a workshop should decide whether it needs replacing
Symptomer du kan merke1
- Malfunction indicator lamp (MIL) lit
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