VOLVO
DDM-6C1A - Child-proof lock motor. Signal too high
System
Driver Door Module (DDM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS40 (2004–2013), V50 (2004–2013)
Show models by year and engine (2)
What does this fault code mean?
The driver or passenger door module (DDM/PDM) has registered too high a signal to the child lock motor in the rear door, and the child lock does not work. The cause can be an open circuit in the signal wire or a short to supply voltage.
Possible causes
- Open circuit in the signal wire to the child lock motor
- Signal wire to the child lock motor short-circuited to supply voltage
What you can do
- 1Read out and note the fault code, clear it, then with ignition on check that the child lock works
- 2Check the wire to the lock motor in the rear door for chafing, crush damage and loose connections
- 3With ignition off, use a multimeter to check that the wire is not broken and has no contact with plus
- 4If you have a diagnostic tool, activate the child lock and listen for the lock motor in the rear door to run
- 5If no fault is found, have a workshop swap out the rear-door control unit
Symptoms you may notice1
- Child lock does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.