Diagnostic Trouble Code (DTC) Information CEM-6C55

Condition 

Fig 1: Identifying Keyless Vehicle Module (KVM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

The central electronic module (CEM) checks the functions in the start inhibiting system. The start inhibiting system includes a number of control modules. When attempting to start, the central electronic module (CEM) checks the included components via encrypted communication. The diagnostic trouble code (DTC) can be diagnosed in ignition positions 0, I, II and III.

The diagnostic trouble code (DTC) is stored if the Central Electronic Module (CEM) receives an incorrect answer from the Keyless Vehicle Module (KVM).

Substitute Value 

• None.

Possible Source 

• Incorrect programming of the Keyless Vehicle Module (KVM).
• Incorrect programming of the central electronic module (CEM).

Fault symptom[s] 

• The starter motor does not turn
• Starting/Engine does not start/Engine does not turn/Unsure when/at all times