Diagnostic Trouble Code (DTC) Information CEM-De54

Condition 

Fig 1: Locating Infotainment Control Module (ICM)

Courtesy of VOLVO CARS CORPORATION

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.

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).

HINT: If several diagnostic trouble codes (DTCs) are stored in the central electronic module (CEM) for communication faults with other control modules in the low speed network, this indicates a common fault in the Control area network. 

Fault symptom[s] 

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