What does fault code PDM-U300362 mean?

Diagnostic fault code details for PDM-U300362 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo V40 (2013–)). Repair service at OBD Tuning.

VOLVO

PDM-U300362 - Battery Voltage. Algorithm Based Failures. Signal compare failure

System

Passenger Door Module (PDM)

Volvo models this fault code applies to

Applies to the following models:

9 models

S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The door module (DDM/PDM) compares its own system voltage against the CEM voltage. The fault is stored when the two do not match, which can be caused by a short circuit to ground, too low supply voltage, or moisture and oxidation in the connections. The code is only worth troubleshooting if it has been active for a long time during the current drive or if you notice malfunctions. Otherwise it does not indicate a fault and can simply be cleared.

Possible causes

Power supply wiring short-circuited to ground
Supply voltage too low
Moisture and/or oxidation in the connections

What you can do

1Read and note the code, clear it and road test the car; if none of the problems above apply, the code can be cleared without further action
2Check that the fuses are intact; see the owner's manual for where they are
3Check that the battery is in good condition and the alternator is charging, and that the earth connection to the door module is secure and free from oxidation
4Check that the wiring to the door module has no chafing or short circuit to ground, and that the connectors are dry and clean
5If you have a diagnostic tool: follow the system voltage in live data while you activate the windows and mirrors, and check that it stays steady
6Have a workshop with diagnostic equipment compare the door module voltage with the CEM voltage if the fault remains

Symptoms you may notice5

Electric windows do not work
The door mirror defrost does not work
The windows work reduced or incorrectly
Locking, unlocking and central locking do not work
Doors and child lock do not work

General guidance for car owners. Diagnosis on the car can point to a different cause.