Diagnostic Trouble Code (DTC) Information CEM-B102451

Condition 

Central electronic module (CEM) checks communication with Start control module (SCU). To enable vehicle start, the Start control module (SCU) and central electronic module (CEM) must be connected to each other via codes.

The diagnostic trouble code (DTC) is stored if the control module detects that:

• A message from Start control module (SCU) indicates that the control module has not been programmed.

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

• Communication with Start control module (SCU).

Fig 1: Identifying Start Control Unit (SCU)

Courtesy of VOLVO CARS CORPORATION

Substitute Value 

• None.

Possible Source 

• Start control module (SCU) is not programmed.

Fault symptom[s] 

• Starter motor does not operate
• Message in information display