Diagnostic trouble code (DTC) information CEM-1C05

Condition 

Fig 1: Identifying Central Electronic Module (CEM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

The central electronic module (CEM) continuously monitors its own power supply.

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that the power supply from the battery (30-supply) is too low.

The diagnostic trouble code (DTC) can be diagnosed with the ignition key in position II and with the engine running.

Substitute Value 

• None.

Possible Source 

• Poor battery charging
• The battery is fully discharged.

Fault symptom[s] 

• Non definable symptom.