Diagnostic Trouble Code (DTC) Information

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.