Rear eDiff fault Code

[rocket rod]

I have the following fault code which I'm trying to resolve

RDCM-Rear Differential

P0658-11 - Actuator supply voltage A - circuit low - General electrical failure - circuit short to ground (AC)
( on 26-06-2023 16:43:04 at 209743 km )

Just got back from a Canning Stock Route trip which broke a brakes sensor cable (easy fix) so it maybe a cable/mud issue I'm looking at. I've searched the forum with no joy. Clearing the code always comes back. A search of the service manual mentions the TCM which is not accessable (to me at least). Are there some connectors/wires etc I should be checking on the ediff?

[Graeme]

Yes there's an electrical connector above the actuator motor. Often LR's short to ground errors are instead broken wires when voltages are read on the device side of the break.

[rocket rod]

I can't get the connector off due to space restraints but all the wires look good so I'll have to leave that to a mechanic next service. The problem I "might" have is that every so often I hear a scuffing noise from the rear tyres going around a corner as though the diff was engaged. Of course the noise could be just a random one too. The question is, if the car sees a fault on the actuator what is the default position on the diff? Is it engaged or not. I would have thought not. The 4x4 info screen shows the diff as green (not engaged)