by mux (Posted Mon, 05 Feb 2018 02:35:00 GMT+7)
First of all, I don't have an answer for you but I'm doing the same thing you're doing, so this is very informative. Your mistake is a learning opportunity for the rest.
What you almost certainly did is temporarily overloading the relay driver. Considering relays are fairly badly behaved in general, they will have engineered this with a PTC fuse or some kind of self-resetting mechanism for overload. The relays are normally open, so when you overloaded the driver, the relay coil voltage sagged and possibly the main pack relay has opened. The RLY P and RLY N signals opening unexpectedly is a critical fault, so the car will NOT restart after that happening. The car thinks the relays have failed short.
This explanation does not account for the charge level of the traction battery seeming to have dropped dramatically. 10% of your SoC is a LOT of energy, about 2kWh. You'll have noticed something vaporizing from that amount of energy being expended. I think either this is a red herring or my explanation is fundamentally flawed.
I think you should be able to see a RLY P failure in your DTCs when connecting to your car with LeafSpy. I don't know if this can be cleared, but other people have messed up much worse than this and got their packs working, so I wouldn't worry too much. Try clearing it and seeing if it works. If you cannot clear it, I believe the maker of LeafSpy has helped people like Leaf XPack clear them anyway with a modified clearing routine. That programmer is awesome.
If the problem persists or reappears immediately after clearing, you have most likely damaged the RLY P driver circuit, and you will have to remove the... I think VCM from your car, open it up (do NOT damage the weathersealing!) and replace most likely just a fuse, maybe some MOSFETs. I am not familiar with these parts, maybe there is an easier to service fuse box, so thoroughly study the service manual before doing anything. Don't take my word. I am currently just as experienced as you are.
