VOLVO
PDM-C1B1511 - Sensor Supply Voltage B. General Electrical Failures. Circuit short to ground
System
Passenger Door Module (PDM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (4)
What does this fault code mean?
The Hall sensors in the window lifts of the rear doors measure how fast each window motor rotates, which is how the window position is determined. The control module supplies power to the Hall sensor in each window lift. It has registered a signal from the output that is lower than expected, which points to the supply cable being shorted to ground.
Possible causes
- Supply cable is shorted to ground
What you can do
- 1Read the code, clear it and run the rear door windows to see whether the code comes back
- 2Check the fuses for the window lifts in the fuse box; if a fuse has blown, look for a short to ground before a new fuse is fitted
- 3Check the connectors at the rear door window lifts and the door module for moisture, oxidation and loose contact
- 4Use a multimeter to check that the supply wire to the Hall sensor has no contact with ground (the body)
- 5If you have diagnostic equipment, read the window position in live data while you run the rear door windows up and down
- 6If the wire is intact but the code comes back: have a workshop check the rear door window lifts and the door module
Symptoms you may notice1
- Automatic closing of the windows does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.