Diagnostic Trouble Code (DTC) Information CEM-De54

Condition

Fig 1: Locating Infotainment Control Module (ICM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that communication with the infotainment control module (ICM) is not operating.

NOTE:

In the event of CEM-DEXX diagnostic trouble codes (DTCs) being stored the central electronic module (CEM) must not be replaced; the diagnostic trouble code (DTC) indicates a communication fault in the Control area network

The diagnostic trouble code (DTC) can be diagnosed when the ignition has been on for at least 10 seconds.

Substitute Value

None.

Possible Source

No power supply to the infotainment control module (ICM)
Open-circuit in the ground lead to the infotainment control module (ICM)
Contact resistance in the terminals
Open-circuit in the wiring for the CAN low speed network to the infotainment control module (ICM)
The infotainment control module (ICM) is not intended for this car (for example a used control module with different software/hardware).

Fault symptom[s]

Buttons on the keypad unit are not working
The VOLUME knob does not function.