So just an update.... there is no update. The car has been in the shop for 3 weeks and they still don't know the root cause of the issue. I went there yesterday to get an update in-person as all I ever got on the phone was "we're still looking at it".
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Whatever the issue is, it's way beyond the skillset of the guys in the workshop and they are relying on Volvo Australia for everything. Last week they "decommissioned the battery", which I learnt was just doing a full discharge on the main battery so the car is safe to work on. Apparently this took some time because they can't drive it and had to draw out the power via some other method. They still have "13 more tests" to run on the car, and one reason they said it's taking a long time to get this resolved is because they do a test, send the info to Volvo Australia, wait for them to analyse the data, then they tell the workshop what to do next. So the delay is in this back and forth.
They are arranging a loan vehicle for me. Luckily I haven't been without transport because I still have my old ICE vehicle (which should be up for sale by now), but I've hung onto it while they sort the XC40 out. But after 3 weeks they can provide a loaner so I can finally put my ICE car up for sale and unlock the $$ value of that.
I'm not disappointed in the dealership that's working on the car...but I am a bit miffed that 3 weeks later they still haven't identified the problem. Maybe I'm over simplifying it in my mind...but the software threw an error and because that error condition was met, the software then shutdown the drivetrain of the vehicle. The software throws an error because it is told to throw the error by a signal it has received. That signal comes from one of several items. In my mind... you just look at those several items where the error has come from and test those components.
Surely that doesn't take 3 weeks?
And I get that this car needs more of a IT/Electrical support engineer rather than a "mechanic", but surely the car keeps an error log somewhere that can be looked at.
Also in the above picture you can't see it, but they have removed all the "frunk" plastic bits to expose the front drive motor. I didn't get a photo of it but the motor is literally fully exposed just under the frunk, complete with heaps of bright orange cables etc.