VOLVO
CEM-1E04 - Communication with the lamp switch module. Signal missing. Intermittent fault
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 lost communication with the light switch module (LSM) shortly after the ignition was switched on. The fault is intermittent, so it may not be present right now. The beam height control and the light switch may then stop working.
Mulige årsaker
- A broken or shorted wire between the light switch and the CEM
- A defective communication unit in the light switch
- A defective communication unit in the CEM
Hva du kan gjøre
- 1Check that the light switch responds: switch the headlights on and off and see whether they react to the controls
- 2Check that the connectors in the cable between the light switch and the CEM are seated and not chafed or corroded
- 3Use a multimeter to check that the cable to the light switch has no break or short to ground
- 4With a diagnostic tool, read the fault codes and see whether communication with the light switch works
- 5After the work, clear the code and check that the beam height control works
Symptomer du kan merke2
- The beam height control does not work
- The light switch does not work
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