Diagnostic trouble code (DTC) information CEM-4F48

Condition 

Fig 1: Identifying Left Camera Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

The central electronic module (CEM) controls communication with the blind spot indication system (BLIS) camera modules.

A diagnostic trouble code will be generated if the central electronic module (CEM) detects an internal fault in the right camera module (RCM).

The diagnostic trouble code can be diagnosed when the ignition is on.

Substitute Value 

• Nothing.

Possible Source 

• Dirty lens.
• Loose connection or oxidation in signal connections to Right Camera Module (RCM).
• Internal fault in right camera module (RCM).

Fault symptom[s] 

• The LED does not come on.
• LED flashing rapidly.