VOLVO
CEM-8F12 - Beam setting control. Signal too low. Intermittent fault
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Dieser Fehlercode hat je nach Modell, Modelljahr oder Motor unterschiedliche Bedeutungen. Wählen Sie die Bedeutung, die für Ihr Fahrzeug gilt.
Gilt für folgende Modelle:
5 ModelleS60 (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 fault is intermittent: the signal from the beam height control was too low on one occasion but is no longer present. The central electronic module (CEM) compares the signal with its own voltage and records the fault when the difference is too large. A connection that briefly loses contact can cause this, so the low beam adjustment can stop working for a while.
Mögliche Ursachen
- Defective beam height control actuator
- Poor contact in the connector
- Open circuit in the wire or short-circuit to ground
Was Sie tun können
- 1Clear the code and check whether it returns; a single intermittent fault can be a temporary disturbance
- 2With the ignition off, gently move the wiring and connectors to find any play
- 3Check that the connectors are clean, dry and firmly seated
- 4Use a multimeter to check that the wire has no break and no contact with ground (the body)
- 5If you have a diagnostic tool, run the actuator motor and listen for it starting without jerking
- 6If the fault returns although the connectors and wire are in order, have a workshop replace the actuator motor
Symptome, die Sie bemerken können1
- The beam height adjustment does not work
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.