VOLVO
PHM-6B15 - Handset speaker Signal too high/Signal missing
System
Phone Module (PHM)
Volvo models this fault code applies to
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 loudspeaker signal to the handset is either too high or missing, depending on whether the wire is short-circuited to supply voltage or has an open circuit. The other party cannot be heard in the handset then, and only hands-free works. A warning symbol may appear in the text display.
Possible causes
- The loudspeaker signal wire between the handset and the control module is short-circuited to supply voltage
- The loudspeaker signal wire between the handset and the control module has an open circuit
What you can do
- 1Check the connections at the handset and at the carphone control module (PHM) for looseness
- 2Use a multimeter to check that the speaker wire has no open circuit, once the connections are checked
- 3If no open circuit is found, have a workshop check that the wire is not short-circuited to supply voltage
Symptoms you may notice2
- The other party cannot be heard when the handset is used
- A text message appears together with a warning symbol
What the fault can affect1
- Only hands-free operates
General guidance for car owners. Diagnosis on the car can point to a different cause.