VOLVO
PDM-DD21 - LIN communication camera module Shorted
System
Passenger Door Module (PDM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
What does this fault code mean?
The passenger door module (PDM) talks to the camera on the passenger side over LIN. It has registered that the signal line for this communication is shorted to voltage or ground, and the code is set as a result.
Possible causes
- The LIN bus is shorted to voltage or ground
What you can do
- 1Activate the blind spot system and check that the LEDs flash three times; then start the engine and check that the LED works
- 2Read the code, clear it and run a test drive. If the code does not come back, no further action is needed, as the fault may have been temporary
- 3Check the connectors at the camera and the door module for moisture, oxidation and loose contact
- 4Use a multimeter to check that the communication cable to the camera has no contact with ground (the body) or voltage
- 5If the fault remains: have a workshop check the wiring and the door module
Symptoms you may notice2
- The LED does not light
- A message is shown in the information display
General guidance for car owners. Diagnosis on the car can point to a different cause.