VOLVO
CEM-1C0A - Alternator control module (ACM). Voltage too high
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–)
Vis modeller per årsmodell og motor (16)
- Volvo S60 (2001–2009)2005Alle motorer unntatt: B5244S6
- Volvo S60 (2001–2009)2006Alle motorer unntatt: B5244S6, D5244T4, D5244T5, D5244T6, D5244T7
- Volvo S60 (2001–2009)2007–2009Alle motorer unntatt: D5244T4, D5244T5, D5244T7
- Volvo S80 (1999–2006)2005–2006
- Volvo V70 (2000–2008)2005Alle motorer unntatt: D5244T3
- Volvo V70 (2000–2008)2006Alle motorer unntatt: D5244T4, D5244T5, D5244T6, D5244T7
- Volvo V70 (2000–2008)2007Alle motorer unntatt: D5244T4, D5244T5, D5244T7
- Volvo V70 (2000–2008)2008Alle motorer unntatt: D5244T5, D5244T7
- Volvo V70 XC / XC70 (2001–2007)2005
- Volvo V70 XC / XC70 (2001–2007)2006Alle motorer unntatt: D5244T4
- Volvo V70 XC / XC70 (2001–2007)2007Kun motor: B5254T2
- Volvo XC90 (2003–)2005Alle motorer unntatt: B8444S
- Volvo XC90 (2003–)2006Alle motorer unntatt: B8444S, D5244T4
- Volvo XC90 (2003–)2007–2012Kun motor: B5254T2
- Volvo XC90 (2003–)2013–2014Kun motor: B5254T9
- Volvo XC90 (2003–)2015
Hva betyr feilkoden?
The CEM checks the charging status of the battery. The battery voltage is measured by the rear electronic module (REM) and sent to the CEM over the CAN network, so faulty data from the REM can trigger this code. It may also be caused by a damaged charge regulator in the generator control module.
Mulige årsaker
- A battery charger with too high charging voltage was connected earlier
- A damaged generator control module (charge regulator)
Hva du kan gjøre
- 1Check that the battery terminals and cable connections are clean and tight
- 2Use a multimeter to measure the battery voltage with the engine off and running. Large differences point to a charging fault
- 3Check that the connectors to the REM are seated and free of corrosion
- 4If you have a diagnostic tool, compare the battery voltage in live data with the voltage the REM reports. The values should match
- 5After the work, clear the code and check that the charging voltage is normal
Symptomer du kan merke3
- The battery electrolyte boils with the engine running
- The headlight bulb burns out
- The engine starts unreliably or not at all
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