VOLVO
CEM-3F91 - Fuel pump relay. Short-circuit to supply voltage
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 the fuel pump relay, which sits inside the CEM. The fault is set if the fuel pump output is shorted to supply voltage, or if the supply wire has a break or the pump is not connected. Older cars with a CEM up to model year 2006 can also have an internal ground path damaged by a short.
Mulige årsaker
- The supply wire to the fuel pump is shorted to supply voltage
- A break in the supply wire to the fuel pump, or the pump is not connected
Hva du kan gjøre
- 1Do not connect the fuel pump or any outside supply without first unplugging the CEM connector. An internal ground path in the CEM can otherwise break
- 2Use a multimeter to check that the wire to the fuel pump has no short to supply voltage or break
- 3Check that the fuel pump is connected and that the connectors are clean and tight
- 4If the fault remains after checking the wire, have a workshop check the CEM, since a short to supply voltage can damage it
- 5After the work, clear the code and check that it does not return
Symptomer du kan merke1
- The battery discharges
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