VOLVO
CEM-9F20 - Twilight sensor. Short-circuit to supply voltage
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode 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 twilight sensor gives the central electronic module (CEM) information about the light conditions. This information sets the brightness of the symbols and the instrument lighting. The fault code is stored when the signal wire from the sensor is shorted to battery voltage.
Mögliche Ursachen
- Signal wire from the twilight sensor shorted to supply voltage
- Damaged twilight sensor
Was Sie tun können
- 1Check that the twilight sensor is firmly fitted and not covered or damaged
- 2With the ignition off, check the sensor connector and wiring for chafing, pinching and loose connections
- 3With the ignition off, use a multimeter to check whether the signal wire has voltage to earth. Voltage there points to a short circuit to supply voltage
- 4Remedy the short circuit if it is found, then clear the fault code
- 5If no fault is found in the wiring, the twilight sensor may need replacing; have a workshop do this
Symptome, die Sie bemerken können1
- The instrument lighting stays on at full brightness all the time
Was der Fehler beeinflussen kann1
- The control module uses the night brightness setting
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.