VOLVO
ECM-8400 - 5 volt power supply. Signal too low. Intermittent fault
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:
7 modellerC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 (2000–2008)
Vis modeller per årsmodell og motor (14)
- Volvo C70 Cabriolet (1998–2005)2000Kun motor: B5244S
- Volvo C70 Coupé (1998–2002)1999Kun motor: B5254S DENSO
- Volvo C70 Coupé (1998–2002)2000Kun motor: B5244S
- Volvo S60 (2001–2009)2001Kun motor: B5244S, B5244S2
- Volvo S60 (2001–2009)2002Kun motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S70 (1997–2000)1999Kun motor: B5254S DENSO
- Volvo S70 (1997–2000)2000Kun motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S80 (1999–2006)1999–2000Kun motor: B5244S, B5244S2
- Volvo S80 (1999–2006)2001Kun motor: B5244S, B5244S2, B5244SG
- Volvo S80 (1999–2006)2002Kun motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (1997–2000)1999Kun motor: B5254S DENSO
- Volvo V70 (1997–2000)2000Kun motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2001Kun motor: B5244S, B5244S2, B5244SG
- Volvo V70 (2000–2008)2002Kun motor: B5244S, B5244S2, B5244SG, B5244SG2
Hva betyr feilkoden?
The engine control module (ECM) monitors the supply voltage to several of the engine sensors. The code is set when the supply is too low, for example if a wire is shorted to ground. The fault is intermittent: it has occurred on an earlier occasion but is not present right now.
Mulige årsaker
- The signal wire is shorted to ground, so the signal becomes too low
- Intermittent short to ground in the wiring harness that only happens now and then
Hva du kan gjøre
- 1Read the code, clear it and road test the car to see whether it comes back
- 2Go through the sensor wiring and look for chafing or crushed areas where the cable can touch ground
- 3Check that the connectors are fully engaged and free from oxidation
- 4Use a multimeter to check that the signal wire has no contact with ground (the body), and move the harness while measuring so an intermittent fault can show up
- 5If you have diagnostic equipment, watch the sensor supply voltage in live data during a road test and see whether it drops when you move the cable
- 6If the wiring shows no fault, have a workshop continue the fault finding on the control module and the sensors
Symptomer du kan merke2
- Poor performance
- Uneven idle
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.