VOLVO
CEM-8A20 - Low beam left. Signal too low
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Feilkoden har ulik betydning avhengig av modell, årsmodell eller motor. Velg betydningen som gjelder din bil.
Gjelder følgende modeller:
5 modellerS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Hva betyr feilkoden?
The central electronic module (CEM) supplies the left-hand low beam directly from one output. The module has registered a current draw on that output that is too high, which points to the signal wire to the lamp being shorted to ground. If the fault keeps returning over several ignition cycles, the output is switched off completely until the code is cleared.
Mulige årsaker
- The signal wire to the left low beam lamp is short-circuited to ground
Hva du kan gjøre
- 1Check that the low beam fuse is intact and that the left bulb sits firmly in its holder
- 2With the ignition off and the connector to the left low beam unplugged, use a multimeter to check that the wire has no contact with ground (the body)
- 3Look for chafed or pinched spots along the wire, especially where it enters the headlamp and the wiring harness. A chafed spot can make contact with the body
- 4Clear the code and switch on the low beam to see whether the fault returns
- 5If the fault returns, have a workshop with diagnostic equipment check the wiring and the module
Symptomer du kan merke1
- The left low beam does not work
Hva feilen kan påvirke1
- The output to the left low beam is switched off permanently after repeated faults, until the code is cleared
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