VOLVO
PHM-000B - Handset cradle. 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:
5 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013), XC90 (2003–)
What does this fault code mean?
The fault covers both a signal that is too high and a missing signal from the handset. The phone module (PHM) registers it when the cradle signal has a break or is shorted to supply voltage, and then the handset does not work.
Possible causes
- The cradle signal wire to the handset is shorted to supply voltage
- A break in the cradle signal wire running to the handset from the phone module (PHM)
What you can do
- 1With the ignition off, check that the connections to the handset and the holder are secure, with no play
- 2Look for breaks or chafing on the cradle signal wire
- 3Use a multimeter to check that the wire is not broken and has no contact with battery positive
- 4If the wire is sound, you can try replacing the handset or the holder
Symptoms you may notice2
- The handset does not work
- Message in the text display, on cars with Volvo On Call
What the fault can affect1
- Only hands-free works
General guidance for car owners. Diagnosis on the car can point to a different cause.