VOLVO
CEM-3F90 - Fuel pump relay. Open-circuit or short-circuit to ground
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
5 modellerS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Hva betyr feilkoden?
The CEM checks and activates the fuel pump relay after the immobilizer has approved its check. The relay sits inside the CEM. The code is set when the voltage on the fuel pump output is too low. The engine does not start.
Mulige årsaker
- A damaged power supply fuse
- An open circuit in the supply wire between the engine bay fuse box and the CEM
- The supply wire between the CEM and the fuel pump is shorted to ground
Hva du kan gjøre
- 1Check the fuse for the fuel pump power supply in the engine bay. If it has blown, replace it once
- 2Use a multimeter to check that the wire between the CEM and the fuel pump has no break or short to ground
- 3Warning: do not connect an external power source directly to the fuel pump without first disconnecting the CEM connector, since the CEM can be damaged
- 4After the work, clear the code and check that the engine starts
Symptomer du kan merke1
- The engine does not start
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