Was bedeutet der Fehlercode CEM-3F91?

Diagnose und Fehlercodedefinition für CEM-3F91 (Volvo S60 (2001–2009), Volvo S80 (1999–2006), Volvo V70 (2000–2008)). Steuergerätereparatur bei OBD Tuning.

VOLVO

CEM-3F91 - Fuel pump relay. Short-circuit to supply voltage

System

Zentralelektronik (CEM)

Volvo-Modelle, für die dieser Fehlercode gilt

Gilt für folgende Modelle:

5 Modelle

S60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)

Modelle nach Baujahr und Motor anzeigen (5)

Was bedeutet der Fehlercode?

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.

Mögliche Ursachen

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

Was Sie tun können

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

Symptome, die Sie bemerken können1

The battery discharges

Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.