Diagnostic Trouble Code (DTC) Information

Condition 

Diagnostic trouble code (DTC) CEM-1A58 is stored if the central electronic module (CEM) registers that communication with the carphone module (PHM) is not operating.

Substitute Value 

None

Possible Source 

• No power supply to the carphone module (PHM)
• Contact resistance in the terminals
• Open-circuit in the control area network (CAN) bus
• Defective carphone module (PHM).

Fault symptom[s] 

• No or reduced functionality in the telephone.