VOLVO
PHM-0063 - Illumination buttons Signal too high/Signal missing
System
Phone Module (PHM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
6 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013), XC90 (2003–)
What does this fault code mean?
The carphone control module (PHM) checks the backlight of the SOS On Call switch, and the code is set when the control signal has an incorrect value. The fault can come from an open circuit in the wire or from the wire being short-circuited to supply voltage. It mainly shows up as problems with Volvo On Call and the mobile phone.
Possible causes
- Open circuit in the wire that lights the SOS On Call switch
- Short circuit to supply voltage in the wire that lights the SOS On Call switch
What you can do
- 1Check that the connectors to the SOS On Call switch are secure and free from corrosion
- 2Read and note the code, clear it and road test the car to see whether it returns
- 3If it returns, have a workshop with diagnostic equipment check the lighting wires and the connectors
Symptoms you may notice2
- Other Volvo On Call problems
- Other mobile phone problems
General guidance for car owners. Diagnosis on the car can point to a different cause.