VOLVO
ECM-4030 - Leak diagnostic unit, preheating. Signal missing
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Feilkoden har ulik betydning avhengig av modell, årsmodell eller motor. Velg betydningen som gjelder din bil.
Gjelder følgende modeller:
2 modellerS40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
The engine control module monitors the drive signal of the heater element inside the leak diagnostic unit. If the signal is above or below the expected range, or absent, the fault code is set, and it is only tested when the leak diagnosis runs. The fault normally gives no noticeable symptoms and no other effect on the car.
Mulige årsaker
- Signal wire short-circuited to ground
- Damaged leak diagnostic pump
- Signal wire short-circuited to supply voltage
- Open circuit in the signal wire
Hva du kan gjøre
- 1Clear the fault code and let the car run a new leak diagnostic to see if it returns
- 2Check the wiring to the heater element of the leak diagnostic unit for chafing, pinching and loose connectors
- 3Check the connector to the leak diagnostic unit for contact resistance and oxidation
- 4Use a multimeter to check that the signal wire has no contact with ground or positive and is not open-circuited
- 5Have you got a diagnostic tool: activate the leak diagnostic heater and check in live data that the control signal follows the activation
- 6Have a workshop check the leak diagnostic unit if the fault returns after the wiring check
Symptomer du kan merke1
- No noticeable symptoms for the driver
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