Diagnostic Trouble Code (DTC) Information PHM-U210991
Condition
The Phone module (PHM) checks the status of the internal reserve system that contains microphone, speaker, SIM card reader, battery and antenna.
The diagnostic trouble code is stored if the control module detects:
- Capacity too low in the spare battery.
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
- Capacity of the internal reserve battery is too low.
Fault symptom[s]
- Volvo On Call/Does not work
- Text window and warning symbol/Text message