VOLVO
ECM-0651 - Reference voltage B. 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 monitors reference voltage B, which goes to several components, and sets the code when that voltage is unstable. The fault may lie in a component's signal wire, or in the control module's own supply of the reference voltage. The malfunction indicator lamp lights.
Mulige årsaker
- Component signal wire shorted 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 affected components for looseness, contact resistance and oxidation
- 2Check the component's signal wire for breaks and chafing
- 3With the ignition off, use a multimeter to check that the signal wire has no short to earth or to voltage
- 4If this does not remedy the fault, a workshop should decide whether the engine control module needs replacing
Symptomer du kan merke1
- Malfunction indicator lamp is on
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