Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information PHM-U300055

Condition
The Phone module (PHM) checks the internal components in the control module.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Faulty signal configuration in the control module.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Control module supplied with power.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.





Substitute value
- None.

Possible source
- Internal fault in the phone module (PHM).
- The Phone module (PHM) is not intended for this vehicle, for example a used control module with different software/hardware.

Fault symptom[s]
- Missing or reduced functionality for Volvo On Call